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www.silan.com.cn

LED Illumination Solutions (2010)

LED Driver Solution with Low Voltage Input (MR16, etc.) Intelligent Solar Lawn Lamp Solution High Voltage Spotlight/Bulb Lamp/PAR Light Solution Fluorescent Lamp Solution

2010-10-22

Silan

Silan Overview

Silan Profile

Silan was founded in Oct. 1997 with head office in Hangzhou, China. In March 2003, Silan made a successful IPO as the first IC design company on the Shanghai Stock Exchange (SSE) . At the end of the third quarter of 2010, Silan had a total assets of more than RMB2 billion. The total share capital of Silan amounted to 434.08 million shares.

Engaged in semiconductor IC design and manufacture, Silan provides high quality ICs and semiconductor devices to customers. During 13-year development, Silan has become a comprehensive company in IC design, manufacture and marketing and joined the front ranks of IC industry in China. Silan has become unique in the high voltage &high power special IC process developed in IDM mode.

Silan's present three core business: devices based on Silan's own special process of high voltage, high power and high frequency; audio/video based on Disc technology; SOC servo

ICs and discrete

Digital

High-brightness LED chips;

Company Confidential, don't copy

page2

Silan

LOCATION

Silan Profile

Silan Microelectronics Korea

Hangzhou

Shenzhen Shenlan Microelectronics Silan R&D Center in USA Silan Microelectronics Taiwan

Process platform develop & manufacture Silan-IC Co.,Ltd

Silan Azuer Co.,Ltd

High brightness LED Silan Microelectronics LED driver & solution design

Company Confidential, don't copy page3

Silan Test Factory in Binjiang

Youwang Microelectronics

Silan

Product Line

Silan Profile

Product line management

AC-DC Products

Power management & Driver

LED Drivers

Digital Audio/Video Products

Motor Drivers(IPM) Finer

Safety Surveillance Products

Maxed Signal & R.F. Products Using product line management mode, based on IPD (integrated product development) system, Silan emphasizes the construction of the process flow and strives to make us more professional, finer and stronger.

MCU Products

Discrete Chips Business Unit

Company Confidential, don't copy

page4

Silan

Development mode: From platform to products

Car GPS charger Adapter

Silan Profile

Solar lawn light

Daylight lamp

LED illumination

Low voltage spotlight High voltage spotlight

Platforms

DC-DC product

AC-DC product

IPM product

Technical platform

Process platform

Package Design

Core Modules

Application development

System Topology

Company Confidential, don't copy

page5

Silan

Core technology

Silan Profile

650V constant current source (can be shutdown) design to support low standby power AC-DC products 600V HVIC design to support LLC power supply, IPM and solar inverter 100V Single-chip integrated technology to support DC LED driver, car power supply and communication power supply Integrated module DBC packaging technology to support multi-chip power module design Discrete devices such as HV MOSFET, IGBT, FRD, SBD, support

power module design

Company Confidential, don't copy

page6

Silan

LED product process platform

9V-25 BICMOS process platform

12V-100V BCD process platform 650V BCD process platform

LED Product Line

0.8u 650V BCD (Power DMOS) 650V BCD 2u 650V BCD 0.8u 100V BCD 100V BCD 0.8u 60V BCD 0.8u 25VBCD With the powerful ability to develop its own process, Silan-IC has completed the development and verification of 0.8um 25V/60V/SCD650V BCD process which supports the design of new generation power supply, LED driver and motor driver etc. 0.8u 650V BCD

0.8u 25V BiCMOS BICMOS 0.8u 9V BiCMOS

2008

2009

2010

2011

Company Confidential, don't copy

page7

Silan

LED product topology

LED Product Line

DC-DC technology platform, including topology of BUCK, BOOST, BUCK-BOOST

AC-DC technology platform, including topology of flyback (SSR/PSR), forward, LLC etc. PFC technology platform, including PSR+PFC

Single-Stage PFC and Primary-Side Constant Current Control

PFC

CRM PFC

5W-25W SSR AC-DC AC-DC 3W-5W PSR AC-DC

LLC AC-DC PFC+PWM COMBO AC-DC

LED

36V BUCK- BOOST LED DRIVER

100V BUCK LED DRIVER

5V-36V BUCK DC-DC

60V BUCK LED DRIVER

2008 Company Confidential, don't copy

2009 page8

2010

2011

Silan

LED driver products

PFC Boost SA7527 SA7528 SVD10N60T

400V Bus

LED Product Line

DC/DC LLC Half-Bridge SDH6299

CC/CV Drive LEDs

12/24V Bus

DC/DC SD16808 SD16809

CC/CV Drive LEDs

AC Input 85~265V

Electronic Transformer and Rectifier

12/24V Bus

Electronic transformer

PFC Flyback SA7527 SD7529 SVD4N65T

24/36/48V Bus

DC/DC SD42522 SD42524 SD42525 SD42560 SD42528 SD42618

CC/CV Drive LEDs

Triac Dimming

SCR dimming

CC/CV Drive LEDs

PSR PFC SD6855 SD6856 SD6858 SVD2N65 SVD4N65

CC/CV Drive LEDs

DC/DC SD42608 SD42609

CC/CV Drive LEDs

Black Parts: Mass Production Red Parts: Under design

Company Confidential, don't copy

page9

Silan

DC-DC LED Driver

Pow er supply Application Max. output pow er 24W 24W AC 12V/24V DC 12V~60V Electronic transformer MR16 spotlight secondary constant current Input voltage 6-36V 6-36V Output voltage Vin*0.95 Vin*0.95 Max. output current 1000mA 1000mA CC Accuracy ±1.5% ±1.5% LED Qty. in series 10 10 Efficiency max.96% max.96%

LED Product Line

Pow er factor -

Part No. SD42522 SD42524

Features * Linear dimming PWM dimming hysteresis loop linear dimming PWM dimming

18W

6-36V

Vin*0.95

1000mA

±3%

10

max.96%

-

SD42525

28W 24W 6W 36W

6-36V 6-36V Note 1 6-36V 6-60V

Vin*0.95 Boost Buck-Boost Boost Vin*0.95

1200mA 1000mA 400mA Note 2 1000mA

±1.5% ±1.5% ±2% ±2% ±2%

10 10 10 15

max.96% Max.95% max.82% Max.95% max.96%

SD42618 SD42528 external MOSFET PWM dimming w ide voltage input SD42560 PWM dimming

0.5W 2.4V-5.0V law n lamp 0.6W

2.4-5.0V 2.4-5.0V

Buck-Boost Boost

150mA 100mA

±1% ±1%

1 2

Max.85% Max.90%

-

2.4V-5.0V

law n lamp

0.6W

2.4-5.0V

Boost+CC

200mA

±1%

1

Max.90%

-

asynchronous charge/dischar SD42608 ge control current reduced on synchronous current SD42609 reduced on schedule SD16808 SD16809 linear dimming PWM dimming linear dimming PWM dimming

DC12V/24V DC12V/24V

Backlight Backlight

8W 23W

4.5-28V 8.0-28V

40V 60V

30mA 60mA

±3% ±3%

8*10 12*10

Max.90% Max.90%

-

Note 1: input voltage +output voltage <36V; Note 2: output current is externally defined; Company Confidential, don't copy page10

Silan

AC-DC LED Driver

Pow er supply Application High-voltage spotlight 85V-265V Bulb lamp Max. output pow er 5W Input voltage 85V-265V Max. output current 1000mA CC accuracy ± 5% Efficiency 75%(3*1W)

LED Product Line

Pow er factor -

Part No. SD6855

Features PSR Driver TR PSR Driver MOSFET PSR PFC dimming

7W

85V-265V

1000mA

± 5%

77%(3*1W)

-

SD6856

PAR lamp

12W

85V-265V

1000mA

± 5%

-

-

SD6858

85V-265V

Fluorescent lamp Fluorescent lamp

36W 36W

85V-265V 85V-265V

-

-

87% 87%

>0.96 >0.96

SA7527 SD7529

PFC PFC

100W 85V-265V Street lamp 150W 150W

85V-265V 85V-265V 85V-265V

-

-

-

SDH6128 SD7528 SDH6299

PFC+PWM PFC LLC

Company Confidential, don't copy

page11

Silan

LED Product Line

Silan's LED driver solution

1 LED driver solution with low-voltage input (MR 16 etc.) 2 Intelligent solar lawn lamp driver solution 3 High-voltage spotlight, bulb lamp, PAR lamp driver solution 4 Fluorescent lamp driver solution

Company Confidential, don't copy

page12

Silan

36V 1A BUCK structure 48V/60V MOSFET 3 strings MR16/stage lamp/secondary CC 36V 1A BUCK hysteresis loop 48V MOSFET 3 strings MR16, landscape lighting

MR16, Electronic transformer, secondary constant current

1. Low-voltage input LED driver solution

36V BOOST structure external power MOSFET electronic transformer lighting secondary CC

BCD1536 BIC0809 BCD1560

2009

Applications Power Supply

2010 Q4 Q1 Q2 Q3 Q4 Q1

2011 Q2 Q3 Q4

Q1

Q2

Q3

LED Spotlight Landscape Lighting LED streed Lamp

SD42522/4

6V-75V

SD42618 SD42525 SD42560 SD42528 60V 1A BUCK structure 75V MOSFET T8-T10, street lamp

the voltage withdraw of MOSFET are 48V/60V/75V except that used in SD42618 CC accuracy ±1.5% ±1.5% ±3% ±1.5% ±1.5% ±1.5% PWM dimming no/yes no/yes no yes yes yes Linear dimming no/yes no/yes no yes yes yes Packa ge SOP8 ESOP 8 SOT89 ESOP 8 SOP16 ESOP 8

The whole product series, including topology of BUCK, BOOST and BUSK-BOOET.

36V BUCK-BOOST structure 48V MOSFET electronic transformer lighting/5 strings MR16 Solar LED lamp

Typ. maximum operating voltage: 36V, max. operating voltage: 60V,product with 100V is under design.

Part No. SD42522/4 SD42522/4EH SD42525 SD42560 SD42618 SD42528

Topology BUCK, average BUCK, average BUCK, hysteresus loop Buck-Boost average BOOST, average BUCK, average

Operating voltage 6V~36V 6V~36V 6V~36V 6V~36V 6V~36V 6V~60V

Output current 1A(Max) 1A(Max) 1A(Max) 1.5A(Max) Externally defined 1A(Max)

VIN-VOUT [email protected] [email protected] [email protected] * * [email protected]

MOSFET [email protected] [email protected] [email protected] [email protected] Externally defined [email protected]

Company Confidential, don't copy

page13

Silan

Block diagram

VIN

MR16, Electronic transformer, secondary constant current

,

1.0 Average current mode, hysteretic mode, constant-on mode

Inductive current sense

COMP

Inductive current sense

VIN SENSE VIN R1 + A1 VREF VDD 7V SW

4

3

SENSE

5

7

VDD

+ -

SW

1

M3 VIN VREF DIM R2 CPS

ADJ

8

OSC S Vsense Q

Vgate M1

+ -

R

+

M1

6

PWM

PWM

R3 M2

GND

2

Average current

Switching current sense

Hysteretic mode

CC characteristics are OK with three structures in ideal status.

Id1

Inductive current

Fixed frequency ON

Average inductive current Iavg

Turn off if the peak value is up to threshold value

+ -

Turn off when higher then the upper threshold value

Rising slopes of inductive current are different with different power supplies and different loads, and Idl is different, as the same, Id2 is different in different conditions.

Constant ON

Turn off after ON period

Td1 Imax

Ton Iavg

Ton

Toff t

Iavg

Imin Td2

Id2

Vref/Rs

t

Turn on when lower than threshold value

Td2

t

Average current

Turn on when lower than threshold value

Hysteretic mode

Constant ON

Company Confidential, don't copy

page14

Silan

Characteristics

Average current mode Load regulation Line regulation Current ripple current vs. external inductor

Load has little effect on open-loop gain, and output current has small change Supplier voltage little effect on open-loop gain, and output current has small change

MR16, Electronic transformer, secondary constant current

1.0 Comparison of average current mode, hysteretic mode and constant-on mode

Hysteretic mode Constant on mode

I I

Vout * (Td1 Td 2) 2* L Vin * Td1 2* L V Rs

I (

Td 2 K ) * Vout L 2 * L *Vin

I

Vo * K * Vin 2 L *Vin 2

Vout * Toff L

In continuous mode, the effect on current caused by inductor can be ignored

Vin Vout K * L Vin I ( Vout K K *Vout * Td 2 ) * L 2 2 L 2 * L 2 * L2 *Vin

I

Vin * Td1 Vout * (Td1 Td 2) * L 2 * L2

I: current change Vout: output voltage change Td1: off-delay Td2: on-delay L: inductance L: inductance change V: hysteresis voltage Rs: sense resistance Vout: output voltage Toff: off time Ton: on time K: time coefficient for fixed on

Conclusion

Average current mode Hysteretic mode Constant on mode

Line regulation Load regulation Current ripple

current vs. external inductor

Good Good Small can be ignored Fixed frequency common complex

page15

Bad Bad Large great influence inverted frequency Fast simple

Bad Bad Affected by Ton great influence inverted frequency Fast simple

Frequency dimming response loop

Company Confidential, don't copy

Silan

1.1 Buck LED driver­ SD42522/4 Features

MR16, Electronic transformer, secondary constant current

TYPICAL APPLICATION CIRCUIT

1. 2. 3. 4. 5. 6. 7. 8. 9.

6V~36V input voltage range Buck average current mode Maximum 1A output current Efficiency up to 96% Excellent constant current accuracy ±1.5% Built-in temperature shutdown and over current protection Frequency jitter Linear/PWM dimming, and the ratio is 500:1 Temperature balance

Vin Cin

4

VIN

3

SENSE

6 PWM 8 TADJ

SD42524

7 VDD 5 COMP

GND 2

SW

1

Application MR16 (1*1W,1*3W,3*1W)

Package: SOP8/ESOP8

LED illumination secondary CC (Max. 24W)

Company Confidential, don't copy

page16

Silan

1.1 Buck LED driver­ SD42522/4 (continued)

Line regulation/load regulation

MR16, Electronic transformer, secondary constant current

350mA 1 LED

2.0

370

SD42524 Output 350mA

8 LEDs 7 LEDs

LED current variation from setting current (%)

Output current (mA)

1.5 1.0 0.5 0

360

Average current mode

350 340

Hysteretic mode

6 LEDs 5 LEDs 4 LEDs 3 LEDs 2 LEDs 1LED

330 320 310

-0.5 -1.0 -1.5 -2.0

5

10

15

20 25 30 Input voltage (V)

35

40

0

22

47 Inductance (uH)

100

Figure 1: the CC accuracy is controlled within ±1.0% with different input voltages and different loads

Figure 2: inductance vs. constant current (hysteretic mode is marked in red)

Conversion efficiency

100

Efficiency (%)

100

SD42524 Output 350mA 8 LEDs

95

Efficiency (%)

95 90 85 80

SD42524 Output 700mA

8 LEDs

90 85 80 75 70

6 LEDs

6 LEDs

3 LEDs

3 LEDs

1LED

75 70

1LED

5

10

15

20 25 30 Input voltage (V)

35

40

5

10

15

20 25 30 Input voltage (V)

35

40

Figure 3: efficiency is up to 96%

Company Confidential, don't copy

page17

Silan

Temperature balance

MR16, Electronic transformer, secondary constant current

VA DJ 1.22V Iout

VA DJ 1.22V

ILED 100%

0.088 Rs

Vin 6~36V Cin RS

4

VIN

3

SENSE

Iout

0.088 VA DJ Rs 1.22

R1

6 PWM 7 VDD

SD42524

SW COMP

1 5

8 ADJ

RNTC GND 2

Tth

T

Figure 4: LED temperature can be reflected on thermal resistor. Temperature balance is available through selecting proper R1/NTC.

Frequency jitter

Low-voltage current characteristics

350mA 3 LED

Output current (mA)

400 350

Hysteretic SD42524

0

8

9

10

11

12

Figure 5: current will not exceed the preset value with low dropout.

Company Confidential, don't copy page18

Input voltage (V)

Figure 6: frequency jitter for low EMI. Generally, magnetic beads are needed for flywheel diode, then the peak value will be increased. MOSFET: 48V/60V

Silan

1.1 Buck LED driver­ SD42522/4 (continued) MR16(3*1W)

D5 C4 R1 + C1 L1

MR16, Electronic transformer, secondary constant current

4

VIN

3

SENSE SW

6 NC

D1 D2

1

7 VDD

D4 D3

SD42522

COMP GND 2

8 NC

C3

5

C2

2*18W External fluorescent lamp

PFC

PWM

PFC+PWM

SD42522

Figure 7: PWM+PFC+SD42522

Company Confidential, don't copy page19

Silan

1.2 Buck (hysteretic mode) LED driver­ SD42525

Features

1. 2. 3. 4. 5. 6. 7. 8. 9. 5V~36V input voltage range Buck hysteretic mode Maximum 1A output current Efficiency up to 96% Excellent constant current accuracy ±3% Built-in temperature shutdown and over current protection Linear /PWM dimming, the ratio is 1000:1 Built-in line voltage compensation (patent), improving the line regulation Low dropout overshoot current compensation (patent)

MR16, Electronic transformer, secondary constant current

TYPICAL APPLICATION CIRCUIT

Vin Cin

5

VIN

4

SENSE

SD42525

SW

1

GND 2

Application

Package: SOT89/SOT23

MR11/16 (1*1W,1*3W,3*1W)

Company Confidential, don't copy

page20

Silan

1.2 Buck (hysteretic mode) LED driver­ SD42525 (continued) Line regulation and load regulation

4 3

Change in output current (%)

MR16, Electronic transformer, secondary constant current

Low dropout overshoot current

350mA 3 LED

2 1 0 -1 -2 -3 -4 -5 -6 -7 -8

1LED 2 LEDs 3 LEDs 4 LEDs

SD42525 Output 350mA

Output current (mA)

400 365 350

Hysteretic mode SD42525

6 LEDs 6 LEDs

5

10

15 20 25 Input voltage (V)

30

35

0

8

9

10

11

12

Input voltage (V)

SD42525 voltage regulation (line voltage compensation)

Voltage regulation in common hysteretic mode

D1

Current before/after compensation

MR11/16(3*1W)

Rs L1

5

VIN Vin AC12~24V D2

4

SENSE

D3 3 NC

SD42525E

SW

1

D4

D5

C1 GND 2

Company Confidential, don't copy

page21

Silan

1.3 Buck-boost LED driver-SD42560 Features

1. 2. 3. 4. 5. 6. 7. 8. 9. 5V~36V input voltage range Buck-boost average current mode Maximum 1.2A output current (Buck mode) Efficiency up to: Buck 96%/ Boost 95%/Buck-Boost 83% Excellent constant current accuracy ±1.5% Threshold value of over voltage protection: 40V(Boost/Buck-Boost) Built-in temperature shutdown and over current protection PWM dimming and the ratio is 500: 1 Frequency jitter

MR16, Electronic transformer, secondary constant current

TYPICAL APPLICATION CIRCUIT

Vin Cin

Rs

8

VIN

3

SENSE-

4

SENSE+

6 PWM

SW

1

SD42560

7 VDD

GND 2 COMP

5

Application

Package: SOP8/ESOP8

MR16 (4*1W, 5*1W) Electronic transformer Solar LED illumination

Company Confidential, don't copy

page22

Silan

1.3 Buck-boost LED driver-SD42560 (Continued)

Vin

MR16, Electronic transformer, secondary constant current

BoostBuckBuck-Boost

Vin Cin 10µF 4.7µF 47µH 0.28

Cin 10µF

47µH

2.2µF Vin Rs Cin 10µF 0.28 47µH

4.7µF

0.14

Rs

Rs

8

VIN

4

3

8

VIN

8

VIN

3

SENSE-

4

SENSE+

SENSE+ SENSE-

4

3

SENSE+ SENSE-

6 PWM

6 PWM

SW

SW

1

6 PWM

SW

1

SD42560

7 VDD

COMP GND

SD42560

5

7 VDD

GND 2 100nF COMP

1

SD42560

5

2 100nF

1µF

7 VDD

GND 2

COMP

5

100nF

Buck-Boost mode

Buck mode

Boost mode

Conversion efficiency (Buck-Boost)

100

Output Current Change Rate (%)

CC accuracy (Buck-Boost)

2.0 1.5 1.0 0.5 0

6 LEDs SD42560 BUCK /BOOST Output 350mA

90 80

Efficiency (%)

SD42560 BUCK /BOOST Output 350mA 3 LEDs 6 LEDs

75

1LED

70 60 50 5 10 15 20 25 30 35 40 Input Voltage(V)

-0.5

3 LEDs

-1.0

1LED

-1.5 -2.0 5 10 15 20 25 30 35 Input Voltage (V) 40

IOUT=350mA Company Confidential, don't copy page23

IOUT=350mA

Silan

1.3 Buck-boost LED driver-SD42560 (Continued) Application of electronic transformer

MR16, Electronic transformer, secondary constant current

Figure 1. waveform output from electronic transformer

In LED illumination powered by electronic transformer, the frequent questions are failure in power on and power shortage with light load SD42560 adopts Buck-Boost for enlarging operating voltage range and improving the energy efficiency. Other patents relating to electronic transformer are under application.

Figure 2. uncontinuous waveform from electronic transformer with light load,

MR16(AC 12V 5*1W)

C1 AC1 R1 C4 D5

Waveform (6V14V) after rectification

Abnormal waveform after rectification will cause power shortage

8

D1 D2 VIN

3

SENSE-

4

SENSE+

6 PWM

D4 D3

SD42560E 0

7 VDD 5 COMP

GND C3 C2 2

SW

1

AC2

Company Confidential, don't copy

page24

Silan

1.4 Boost LED driver ­ SD42618 Features

1. 2. 3. 4. 5. 6. 7. 8. 9. 6V~36V input voltage range Boost average current mode External MOSFET, and the current is decided by sense resistor Built-in short-circuit protection Built-in over voltage prtoection (the threshold value is externally defined) Built-in temperature shutdown and over current protection PWM/linear dimming Frequency jitter Thermal balance compensation

MR16, Electronic transformer, secondary constant current

TYPICAL APPLICATION CIRCUIT

VIN EN VDD

GATE CS

SD42618

OVP FAULT FB GND

ADJ PWMD SLOPE RT COMP

Application LED illumination secondary constant current (External MOSFET) Electronic transformer

Package: SOP16

Company Confidential, don't copy

page25

Silan

1.4 Boost LED driver ­ SD42618 (Continued) Conversion efficiency

100 95 90

Efficiency (%)

SD42618 Output 350mA 8 LEDs 6 LEDs 12 LEDs

MR16, Electronic transformer, secondary constant current

CC accuracy

2.0 1.5

Change in output current (%)

SD42618 Output 350mA

15 LEDs

1.0 0.5

6 LEDs

85 80 75 70 5 10 15

Input voltage (V)

IOUT=350mA

Company Confidential, don't copy

`

20 25 30 35 40

0

8 LEDs

-0.5

12 LEDs

-1.0 -1.5 -2.0 5 10 15 20 25 30 35 Input voltage (V)

15 LEDs

40

IOUT=350mA

page26

Silan

1.5 Buck LED driver ­ SD42528

Features 1. 2. 3. 4. 5. 6. 7. 8. 9. 6V~60V input voltage range Buck average current mode Maximum 1.0A output current Efficiency up to 96% Excellent constant current accuracy ±2% Built-in temperature shutdown and over current protection PWM dimming and the ratio is 500: 1 Frequency jitter Thermal balance compensation

MR16, Electronic transformer, secondary constant current

TYPICAL APPLICATION CIRCUIT

Vin Cin

4

VIN

3

SENSE

6 PWM 8 ADJ

SD42528

7 VDD 5 COMP

GND 2

SW

1

Application T8-T10 secondary constant current (Max. 36W) Street lamp Automobile illumination

Package: ESOP8

Company Confidential, don't copy

page27

Silan

1.5 Buck LED driver ­SD42528 (Continued)

Conversion efficiency

100

SD42528 Output 700mA 10 LEDs 12 LEDs

MR16, Electronic transformer, secondary constant current

CC accuracy

2.0 1.5

95

6 LEDs

Change in output current (%)

90

Efficiency (%)

3 LEDs

1.0 0.5 0 -0.5 -1.0 -1.5 -2.0 5 10

SD42528 Output 700mA 12 LEDs 10 LEDs

85 80 75 70

8 LEDs 6 LEDs 3 LEDs 2 LEDs 1LED

1LED

5

10

15

20

25

30

35

40

50

15

20

25

30

35

40

50

Input voltage (V)

Input voltage (V)

IOUT=700mA

IOUT=700mA

T8-T10 Application (secondary constant current)

PFC

Company Confidential, don't copy page28

SD42528

Silan

Intelligent solar lawn lamp

BCD1536 BIC0809 BCD1560

2. LED driver for intelligent solar lawn lamp

2009

Applications Power Supply

2010 Q4 Q1 Q2 Q3 Q4 Q1

2011 Q2 Q3 Q4

Q1

Q2

Q3

SD42608

Solar Law n Light 2.4V-5.5V

SD42609

BUCK-BOOST structure Flexible application Efficiency is average with full voltage range Intelligent illumination control BOOST+CC topology Single string LED connected in parallel Highest efficiency when input voltage is 2.8-3.4V Intelligent illumination control

Solar lawn lamp system consists of solar battery, rechargeable battery, photosensitive switch and LED illumination etc. Lithium lron Phosphate Battery is widely used in solar LED lawn lamp because of its reliability, high temperature resistant, charging/recharging with large current and no memory effect. Silan's solution is especially for Lithium lron Phosphate Battery. The topology is necessary to be optimized due to similar voltage drop of single LED and Lithium lron Phosphate Battery .

Part No. SD42608 SD42609

Topology SPEIC+CC BOOST+CC

Operating voltage 2.4V-5.0V 2.4V-5.5V

Output current 0.15A 0.2A

CC accuracy ±1% ±1%

Charge function Yes Yes

Photosensitive detection Yes Yes

Fixed current reduce Yes Yes

Package SOP16 SOP16

Company Confidential, don't copy

Page 29

page29

Silan

Features

1. 2. 3. 4. 5. 6. 7. 8. 2.4V~5V input voltage (Lithium lron Phosphate Battery) Buck-Boost average current mode Maximum 150mA output current Efficiency up to: Boost 90/Buck-Boost 85 Excellent constant current accuracy ±1% Enable controlled by environment light External set for selecting operating mode Timing can be set through pin

Intelligent solar lawn lamp

2.1 LED driver for intelligent solar lawn lamp­ SD42608

TYPICAL APPLICATION CIRCUIT

C1

LED current is decided by Rs

RS Lithium lron Phosphate Battery VBAT R1 12 BAT 13 CDS 3 CS1 CS+ SW 8 LED L1 D1

20mA/40mA/80mA/100mA

Environment light is detected automatically by photosensitive resistor

4 COMP C2

CON 14

MODE

Pins MODE/TIMER are used for setting fixed current reducing to enlarge illumination period

SD46208

VSOL Solar battery

10 SOL MODE 9 GND 5

TIMER TIMER 16 PGND 6

Automatic control during charging on rechargeable batteries (Li-ion battery, Lithium lron Phosphate Battery etc.) by solar battery Automatic control on operating mode, such as driver off, LED current reducing after exact timing.

Application

Solar lawn lamp

LED current can be externally set for application with different types; the current is constant with fullrange input. Automatic control is available through automatic detection (such as feedback of photosensitive resistance or voltage of solar battery) Various protections: input under-voltage/over voltage/over temperature protections low standby current (not working during daytime) to reduce ineffective power dissipation.

Package: SOP16

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Line regulation

Change in output current (%)

2 1 0 -1 -2 2.5 2.6 2.7 2.9 3.0 3.1 3.2 3.3 3.4

Floating

Iout=20mA Iout=40mA Iout=80mA

Intelligent solar lawn lamp

2.1 LED driver for intelligent solar lawn lamp­ SD42608 (Continued)

Mode selection

Pin TIMER Mode Pin MODE Time 04h After 4h 04h After 4h 06h After 6h 06h After 6h 08h After 8h 08h After 8h Output current (RS=1) 100mA 25mA 100mA 0mA 100mA 25mA 100mA 0mA 100mA 25mA 100mA 0mA

Connec ted to GND

Connected to GND Or floating Connected to BAT Connected to GND or floating Connected to BAT Connected to GND or floating Connected to BAT

Input voltage (V)

Conversion efficiency

95.00 92.50 90.00 87.50 85.00 2.5

Iout=20mA Iout=40mA Iout=80mA

Connec ted to BAT

Boost drives 2LED

2.6

2.7

2.9

3.0

3.1

3.2

3.3

3.4

Input voltage (V)

Company Confidential, don't copy page31

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Features

1. 2. 3. 4. 5. 6. 7. 8. 2.4V~5V input voltage range Boost+constant current synchronous mode Maximum 200mA output current Efficiency up to 90%(single lamp) Excellent constant current accuracy ±1% Enable controlled by environment light External set for selecting operating mode Timing can be set through pin

Intelligent solar lawn lamp

2.2 LED driver for intelligent solar lawn lamp-SD42609

TYPICAL APPLICATION CIRCUIT

R4

CS

LED NC NC NC

1 2 3

16 15 14

AGND COMP CDS MODE R3 SOL BAT PGND SW L1 R1 C3 R2 MODE VSOL

SD42609

4 5 6 7 8

13 12 11 10 9

LED NC

VBAT 2.4~3.7V

C2 C4

VBAT

OUT

C1 NC

Application Solar lawn lamp

Package: SOP16

Company Confidential, don't copy

page32

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Line regulation

Change in output current (%)

2 1 0 -1 -2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8 4

Iout=20mA Iout=40mA Iout=80mA

Intelligent solar lawn lamp

2.2 LED driver for intelligent solar lawn lamp-SD42609 (Continued)

Mode selection

Mode Pin MODE Time 05h Connected to GND

Input voltage (V)

Output current (Rs=1) 80 mA 40 mA 0mA 100 mA 50 mA 0mA

510h After 10h 06h

Conversion efficiency

95

Iout=20mA Iout=40mA Iout=80mA

The highest efficiency is available with 2.8~3.4V input

Connected to BAT

612h After h

Efficiency (%)

90 85 80 75

2.4

2.6

2.8

3.0

3.2

3.4

3.6

3.8

4

Input voltage (V)

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Silan

HV spotlight, bulb lamp, PAR lamp

BCD10700 BIC0809

3. PSR PFC LED controller

2009

Applications Output Power

2010 Q4 Q1 Q2

SD6855

2011 Q4 Q1 Q2 Q3 Q4

Q1

Q2

Q3

Q3

HV spotlight

3W-7W

PAR lamp

5W-12W

Output power: 5-7W external driver MOSFET HV spotlight, bulb lamp, PAR lamp

Output power: 3-5W external driver HV spotlight

SD6856 SD6858

GU10 spotlight

Output power: 5-12W External driver MOSFET PFC function Triac dimming HV spotlight, bulb lamp, PAR lamp

E27 spotlight Bulb lamp Part No.

SD6855 SD6856 SD6858

PAR38

Output power (Max.)

3W-5W 5W-7W 5W-12W

Start mode

Resistor Resistor Resistor

Control mode

PFM PFM PFM

MOSFET

External External External

Package

SOT23-6 SOT23-6 SOP8

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page34

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Features

1. 2. 3. 4. 5. 6. 7. 8.

HV spotlight, bulb lamp, PAR lamp

3.1 PSR LED driver­ SD6855(transistor), SD6856 (MOSFET)

Application

(V)

30 25 20 15 10 5 0

SD6856 Output 25V/300mA

Low start current: < 3uA Spotlight, bulb lamp, PAR lamp PFM mode Successive current limit Package: SOT23-6 CV/CC control mode Over voltage, under voltage, open-circuit and over temperature protections CC accuracy: ±5% Output power: 5W (transistor), 7W (MOSFET) No need of opto-coupler and 431 The output voltage should be

Resistor start, the low start current is helpful to reduce power dissipation and improve the efficiency. Resistor: 5M-10M

L L1 FR C1 BO1 N R3 R2 ns2 C2 R1

0

50

100

150 200 250 (mA)

300

350

400

LED works in CC mode

set considering the LED quantity to ensure VO>LED VF and to make the IC working in CC mode. Also, the no-load voltage should be taken into consideration. 2.1(R 2 R3) ns1

R4 is used for adjusting current consistency with high/low voltage inputs.

Vo

R3

ns 2

Vd1

R9 Tdel R 4 R5 Lm

D1

R8 is used for controlling no-load voltage

D3

R4

C4

R7 C5 R6 np ns1 D2 R8

VCC (Vo Vd1)

ns 2 Vd 3 ns1

C3

FB VCC DRV

R9

Q1

VCC setting

SD6855/6

GND ISEN

Io

R5

1 Vpk np Ds 2 R5 ns1

Company Confidential, don't copy

R5 is used for determining LED output current

page35

Silan

HV spotlight, bulb lamp, PAR lamp

3.2 PSR LED driver­ SD6855(transistor), SD6856 (MOSFET)(Continued)

3×1W current accuracy

390 380

Output current (mA)

1×3W current accuracy

74

340

SD6855 Output 5V/700mA

Output current (mA)

7×1W current accuracy

330

SD6856 Output 25V/300mA

SD6855 Output 12V/350mA

73

Drive TR

Drive MOS

370 360

72

Efficiency (%)

320 310 300 290 280 85

T=50

71 70 69 68 85

Drive TR

Drive MOS

350 340 330 85

115

130

150 180 200 Input voltage (V)

230

245

265

115

130

150

180

200

230

245

265

115

130

Input voltage (V)

150 180 200 Input voltage (V)

230

245

265

3×1W current accuracy

740 730

Output current (mA)

1×3W Efficiency

81 80

SD6855 Output 12V/350mA Drive MOS

7×1W Efficiency

84 82

Efficiency (%)

SD6856 Output 25V/300mA T=50

SD6855 Output 5V/700mA

720 710 700 690 680 85

Drive TR

79

Efficiency (%)

Drive TR

Drive MOS

80 78 76 74

78 77 76 75 85

115

130

150 180 200 Input voltage (V)

230

245

265

115

130

150

180

200

230

245

265

72 85

115

130

150

180

200

230

245

265

Input voltage (V)

Input voltage (V)

Driver MOSFET features high efficiency, suitable for large power needed

Company Confidential, don't copy page36

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3.1 PSR PFC LED driiver­ SD6858

Features 1. 2. 4. 5. 6. 7. Integrated PFC function SCR dimming Built-in VCC under voltage protection Cycle-by-cycle current limit Output short-circuit and over-voltage protections Maximum output power:12W

HV spotlight, bulb lamp, PAR lamp

TYPICAL APPLICATION CIRCUIT

Vin VO

85 ~ 265 VAC

3. Built-in soft start

VCC FB DRV VR

SD6858

ISEN GND

Patent of PSR PFC CC control with dimming is under application

Application

Package: SOP8

Spotlight, bulb lamp, PAR lamp

Company Confidential, don't copy

page37

Silan

Fluorescent light

BCD1525 BCD10700

4. PFC LED controller

2009

Applications Output Power

2010 Q4 Q1 Q2 Q3 Q4 Q1

2011 Q2 Q3 Q4

Q1

Q2

Q3

LED fluorescent lamp

12W-36W

SA7527

SD7529

TM PFC for LED fluorescent lamp (Flyback application)

To reduce no-load standby power dissipation To increase OCP to increase source over current protection

Part No.

SA7527 SD7529

Description

CRM PFC controller No-load standby/OCP/source over current

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4.1 PFC LED driver­SD7529

Features 1. 2. 3. 4. 5. 6. Low start current: 30uA High-quality linear multiplier Over voltage adjustment with high accuracy. Built-in soft start Source over current protection Output short-circuit protection (patent is under application)

AC

Fluorescent lamp

TYPICAL APPLICATION CIRCUIT

MULT GND

SD7529

IDET VCC OUT CS

Vin

SW SEN

SD42528

EA_OUT INV

VCC

GND VDD COMP

Application Built-in 18W fluorescent lamp Built-in 18W*2 fluorescent lamp

Package: SOP8

Company Confidential, don't copy

page39

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Fluorescent lamp

4.2 15W-18W isolated single-stage PFC driver solution

Single Stage Co AC Source EMI Filter Rectifier Bridge Isolated AC/DC PFC Flyback

PFC output ripple is large and it is needed to reduce ripple by large output capacitor Co

Amplifier CC

LED Lighting

Figure 1 Block diagram Features(10 strings 550mA) 85265V input voltage range PF>0.96

SA7527

TYPICAL APPLICATION CIRCUIT

Change in output current is less than ±3% with full-range input Efficiency: >86 Standby power dissipation< 0.5W Output voltage ripple< 1.35V Output current ripple< 175mA Co=330uF*3 H=12mm,W=18mm,L=260mm

page40

AC

MULT GND

IDET VCC OUT CS

EA_OUT INV

VCC

CC/CV

Figure 2 Schematic diagram of single-stage LED fluorescent lamp driver

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Single-stage DEMO test results (25 )

Fluorescent lamp

90.00% 89.00% 88.00%

87.00% 86.00% 85.00% 84.00% 83.00% 90 120 150 190 (V) 220 250

Figure 3 Output voltage ripple and current ripple

Figure 4 Input voltage ripple and current ripple

Figure 5 Efficiency

DEMO appearance

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4.3 15W-18W isolated two-stage PFC driver solution

Fluorescent lamp

Two Stage AC Source Rectifier Bridge Isolated AC/DC PFC Flyback Co DC/DC converter Buck LED Lighting

EMI Filter

Figure 1 Block diagram for two stage solution Features (10 strings 550mA) 85265V input voltage range PF>0.96 Output current is less than ±1.5% with full-range input Efficiency: >85 Standby power dissipation< 0.5W>0.3W Output voltage ripple < 200mV Output current ripple< 20mA Co=330uF*1 H=12mm,W=18mm,L=260mm

AC

Patent of two-stage solution without opto-coupler/431 is under application SCR dimming patent is under application

BUCK structure is used for decreasing ripple and reducing PFC output capacitance

TYPICAL APPLICATION CIRCUIT

Reduced Cap

MULT GND

Inductor

SD7529

IDET VCC OUT CS

Vin

SW

SD42528

SEN

EA_OUT INV

VCC

GND VDD COMP

Figure 2 Schematic diagram of two-stage LED fluorescent lamp driver

page42

Company Confidential, don't copy

Silan

Two-stage DEMO test results (25 )

Fluorescent lamp

90.00% 89.00% 88.00%

87.00% 86.00% 85.00% 84.00% 83.00% 90 120 150 190 220 250

(V)

Figure 3 Output voltage ripple and current ripple

Figure 4 Input voltage ripple and current ripple

Figure 5 Efficiency

DEMO appearance

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page43

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Features of LED driver products

High reliability:

Ending

ABICMOS/BCD is adopted for improving ESD, Latch Up ability and voltage withdraw of IC BVarious protections available: thermal shutdown, load abruptly connected/disconnected CFew peripheral components, especially no use of short-life component, such as opto-coupler, output electrolytic capacitor etc.

High power density:

BCD technology with internal MOSFTER and high-efficiency system structure are adopted for improving power density, meeting requirements of LED illumination with small volume.

High CC accuracy:

Average current mode is used for improving CC accuracy.

Wide voltage range:

Maximum voltage with BUCK structure can be up to 60V, and the objective is 100V.

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Advantage of LED driver product

High performance-cost ratio:

LED product line

Driver product features high performance-cost ratio, and IDM mode is also adopted for low cost.

System solution support:

LED illumination is a new field and the application solution should be supported by IC company. Silan has the professional AE/FAE groups covering Hangzhou/Shenzhen/Taipei/ Korea Seoul, providing services for customers.

Perfect solution: Silan has whole LED product line and provide perfect solutions for customers, including AC input, DC input, discrete devices of CRD, MOSFET etc.

Hangzhou AE manager: Shenzhen FAE manager:

Cai Yoongjun Cao Jingping

Tel: 0571-88210880 Tel: 0755-83476058

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Thank you

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