Diodes AP3608E - Manual (Page 4)

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)