Manual
AP3156
HIGH EFFICIENCY 1X/1.5X/2X CHARGE PUMP
FOR WHITE LED APPLICATIONS
AP3156 Rev. 1 3 of 15 SEPTEMBER 2009
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Pin Descriptions
Pin Name
Pin
Number
Description
D6 1 Current Sink Input #6. Connected to VOUT when un-used.
SDI 2 Serial Digital Interface Control Pin
NC 3 No Connection
VOUT 4
Charge pump output to drive load circuit. Requires 1µF capacitor connected between
this pin and
g
round
C2P 5
Positive Terminal of Flying Capacitor 2. Connects a 1µF capacitor between C2
P and
C2
N.
C1P 6
Positive terminal of Flying Capacitor 1. Connects a 1µF capacitor between C1
P and
C1
N.
C1N 7 Negative Terminal of Flying Capacitor 1
C2N 8 Negative Terminal of Flying Capacitor 2
GND 9, 11 Ground.
VIN 10 Input Power Supply. Requires 1µF capacitor between this pin and ground.
D1 12 Current sink input #1. Connected to VOUT when un-used.
D2 13 Current sink input #2. Connected to VOUT when un-used.
D3 14 Current sink input #3. Connected to VOUT when un-used.
D4 15 Current sink input #4. Connected to VOUT when un-used.
D5 16 Current sink input #5. Connected to VOUT when un-used.
GND EP PAD Exposed Pad (bottom). Connected to GND directly underneath the package.
Functional Block Diagram