PRODUCT DATASHEET
AAT3105178
ChargePump
TM
Pin Description
Pin #
1
2
3
4
5
6
7
8
9
10
Low Cost 1x/2x 4 Channel Charge Pump WLED Driver
Name
D2
D1
OUT
C-
C+
GND
EN/PWM
IN
D4
D3
Function
LED2 Current Source Output. D2 is the output of LED2 current source. Connect LED2’s anode to D2 and its
cathode to GND.
LED1 Current Source Output. D1 is the output of LED1 current source. Connect LED1’s anode to D1 and its
cathode to GND.
Charge Pump Output. OUT is the output of the charge pump. Bypass OUT to GND with a 1μF or larger ce-
ramic capacitor.
Charge Pump Capacitor Negative Node.
Charge Pump Capacitor Positive Node. Connect a 1μF ceramic capacitor between C+ and C-.
Analog Ground. Connect this pin to the system’s analog ground plane.
LED Enable and control input. EN/PWM is the ON/OFF control for the LED and the PWM input for the AAT3105
to control the LED brightness.
Power source input. Connect IN to the power source, typically the battery. Bypass IN to GND with a 1μF or
larger ceramic capacitor.
LED4 Current Source Output. D4 is the output of LED4 current source. Connect LED4’s anode to D4 and its
cathode to GND.
LED3 Current Source Output. D3 is the output of LED3 current source. Connect LED3’s anode to D3 and its
cathode to GND.
Pin Configuration
SC70JW-10
(Top View)
D2
D1
OUT
C-
C+
1
2
3
4
5
10
9
8
7
6
D3
D4
IN
EN/PWM
GND
2
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3105.2008.10.1.0
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