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AP3152
120mA HIGH EFFICIENCY WHITE LED DRIVER
Block Diagram
C2 P
C2 N
C1 P
C1 N
V OUT
V IN
CHARGE PUMP
SWITCHES
SHORT
CIRCUIT
PROTECTION
OVER
VOLTAGE
PROTECTION
SDI
SERIAL
DIGITAL
INTERFACE
BANDGAP
DIGITAL
CONTROL
BLOCK
OUTPUT VOLTAGE REGULATION
&
LED SHORT CIRCUIT DETECTION
D1
D2
OSCILLATOR
D3
OVER
TEMPERATURE
CURRENT
CONTROL
D4
PROTECTION
UNDER
VOLTAGE
LOCKOUT
GND
Typical Application Circuit
V IN
1uF
C IN
8
V IN
C2 P
C2 N
C1 P
6
7
3
1uF
C 2
1uF
C1 N
4
C 1
AP3152
V OUT
5
D4
LED
D3
LED
D2
LED
D1
LED
1uF
C OUT
SDI
2
SDI
GND
D4
D3
D2
D1
1
12
11
10
9
AP3152 Rev. 3
3 of 13
FEBRUARY 2009
www.diodes.com
?
Diodes Incorporated
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