LT3492EFE-TRPBF Ver la hoja de datos (PDF) - Linear Technology

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LT3492EFE-TRPBF

Triple Output LED Driver with 3000:1 PWM Dimming

Linear Technology 

LT3492

TYPICAL APPLICATIONS

Triple LED Driver Driving LED Strings in Buck, Boost and Buck-Boost Modes

VIN

10V TO 16V

C1

3.3μF

s3

TG1

ISP1

330mΩ

ISN1

M1

2 LEDs

0.3A

C2

0.47μF

L1

6.8μH

D1

L2

22μH

L3

33μH

4 LEDs

0.1A

C3

1μF

TG2

10 LEDs

D2

ISP2

1Ω

ISN2

M2

825k

OVP2

0.1A

20k

TG3

ISN3

ISP3

D3

C4

0.1μF

M3

1Ω

3.9M

C5

1μF

VIN

OVP3

100k

SW1

SW2

SW3

ISP1-3

ISN1-3

VIN

PWM1-3

SHDN

LT3492

GND

C1: MURATA GRM55DR71H335KA0193

C2: MURATA GRM21BR71H474KA88

C3, C5: MURATA GRM31MR71H105KA88

C4: MURATA GRM21BR71H104KA01B

D1: DIODES DFLS130

D2, D3: ROHM RB160M-60

L1: TDK VLF5014AT-6R8MR99

L2: TDK VLF5014AT-229MR62

L3: TDK VLF5014AT-330MR50

M1: ZETEX ZXMP3A13F

M2, M3 ZETEX ZXMP6A13F

TG1-3

OVP2-3

VC1-3

VREF

CTRL1-3

FADJ

OVP1

150k

18.2k

49.9k

1.3MHz

2.2nF

3492 TA05

3000:1 PWM Dimming at 100Hz for CH1 (Buck Mode)

3000:1 PWM Dimming at 100Hz for CH2 (Boost Mode)

PWM

5V/DIV

ILED

0.5A/DIV

IL

0.5A/DIV

1μs/DIV

3492 TA05b

PWM

5V/DIV

ILED

0.1A/DIV

IL

0.5A/DIV

1μs/DIV

3492 TA05c

3000:1 PWM Dimming at 100Hz for CH3 (Buck-Boost Mode)

16

PWM

5V/DIV

ILED

0.1A/DIV

IL

0.5A/DIV

1μs/DIV

3492 TA05d

3492f

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