Data sheet, Functional block diagram – Diodes AP3608E User Manual

Page 4

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EIGHT-CHANNEL CONSTANT CURRENT SINK WITH CURRENT MATCH AP3608E

Data Sheet

4

Mar. 2011 Rev. 1. 5

BCD Semiconductor Manufacturing Limited

Functional Block Diagram

Figure 3. Functional Block Diagram of AP3608E

A (B)
A for QFN-4

×

4-24

B for TSSOP-20(EDP)/SOIC-20

PWM Dimming

SDB

DFF

Bandgap

UVLO

EN

OTP

EN

Logic

Time

Out

3V

100mV

CH1

FB

CH2

Disable

or

All STG

or

Synchronous

with PWM

Signal

8

10

0:1

ISET

Current Sink

EN

Current Sink

Current Sink

CH3

Current Sink

CH4

Current Sink

CH5

Current Sink

CH6

Current Sink

CH7

Current Sink

CH8

CH2

Min.(CH1...CH8, FBx)

CH3

CH4

CH5

CH6

CH7

CH8

V

CC

Max.(CH1...CH8)

STG

(Short To GND)

COMP

EN

100mV

Test

CH1...CH8

8

CH1...CH8

V

REF

EN

8

CH1

VCC

GND

PWM

16

V

REF

V

CC

+

OPA

4

SDBX

FBX

1 (1)

5 (11)

8 (13)

9 (14)

10

(15)

11

(16)

12

(17)

14, 21 (5, 6, 18)

15 (19)

16

(20)

17

(10)

18

(9)

19

(8)

20

(7)

22

(4)

23

(3)

24

(2)

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