LTC3524 Просмотр технического описания (PDF) - Linear Technology

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LTC3524

Adjustable TFT Bias Supply with WLED Driver

Linear Technology 

LTC3524

BLOCK DIAGRAM

10μH

2.5V TO 6V

4.7μH

+5V

R2

324k

+10V

+12.5V

10μF

5

SW1

VBEST

2 VIN

4

VOUT

R1

1M

SHDN

SYNCHRONOUS

PWM BOOST

CONVERTER

HIGH

VOLTAGE

PWM BOOST

CONVERTER

FBVO 1.225V

3

21

SW2

VLED

20

STRING ENABLE

LED CURRENT

SHARING

OVP

LED1

19

LED2

18

C2+

7

C2–

6

V2x

8

IN

CHARGE

PUMP

DOUBLER

OUT

SHDN

16 CH+

17 CH–

VH

15

IN

REGULATED

CHARGE

PUMP

QUADRUPLER

OUT

R3

SHDN

2M

VOUT

CHARGE

PUMP

SEQUENCER

OSCILLATOR

CONTROL

PROG

23

ELED2

22

SHUTDOWN WHEN

ELCD = ELED1 = ELED2 = 0V

ELED1

24

ELCD

1

IN

REGULATED

CHARGE

PUMP

INVERTER

OUT

VNIN

9

CN+

10

NC

11

VN

12

SHDN

R4

220k

FBH 1.225V

14

GND,

EXPOSED PAD

25

FBN

1V

13

3524 BD

10μF

RPROG

ANALOG DIMMING

ENABLE/PULSE DIM LED2 STRING

ENABLE/PULSE DIM LED1 STRING

LCD BIAS ENABLE

V2x

–7.5V

R6

1M

R5

470k

VOUT

3524f

8

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