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AS3691
Datasheet
Pin Number
Pin Number
QFN
ePTSSOP
Pin Name
Type
Description
Package
Package
Current source CURR4 control; internal pullup
resistor to VREG (can be left open, if CURR4 is
7
16
ON4
DI
always switched on)
High … 100% Current
Low … 5% Current
8
9
10
17
18
19
UV4
TEST
UV3
AO
AI
AO
Automatic supply regulation for CURR4; if not
used, leave open
Digital Test input; Leave open or connect to
VSS; internal pulldown to VSS
Automatic supply regulation for CURR3; if not
used, leave open
Current source CURR3 control; internal pullup
resistor to VREG (can be left open, if CURR3 is
11
20
ON3
DI
always switched on)
High … 100% Current
Low … 5% Current
12
13
14
15
16
17
18
21
22
23
24
1
2
3
RES3
CURR3
RFB3
VREG
RFB2
CURR2
RES2
AI/O
AI/O
AI
S
AI
AI/O
AI/O
Connect to current set resistor R3
Current Source 3 Output
Connect to current set resistor R3 directly at
resistor itself
Shunt regulator supply; connect to Rvdd and
Cvdd
Connect to current set resistor R2 directly at
resistor itself
Current Source 2 Output
Connect to current set resistor R2
Current source CURR2 control; internal pullup
resistor to VREG (can be left open, if CURR2 is
19
4
ON2
DI
always switched on)
High … 100% Current
Low … 5% Current
20
21
22
5
6
7
UV2
VSS
UV1
AO
S
AO
Automatic supply regulation for CURR2; if not
used, leave open
VSS Supply connection
Automatic supply regulation for CURR1; if not
used, leave open
Current source CURR1 control; internal pullup
resistor to VREG (can be left open, if CURR1 is
23
8
ON1
DI
always switched on)
High … 100% Current
Low … 5% Current
24
Pad
9
Pad
RES1
VSS
AI/O
S
Connect to current set resistor R1
VSS Supply connection; add as many vias to
ground plane as possible
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Obsolescence Mitigation Program 标准包装:2,500 系列:- 恒定电流:- 恒定电压:- 拓扑:升压（升压），切换式电容器（充电泵） 输出数:1 内部驱动器:是 类型 - 主要:背光 类型 - 次要:白色 LED 频率:625kHz ~ 875kHz 电源电压:2.7 V ~ 5.3 V 输出电压:5V 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-µMAX 包装:带卷 (TR) 工作温度:-40°C ~ 85°C
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