PAM2701 Datasheet, PDF (2/14 Pages) Power Analog Micoelectronics – 4-Channel Regulated Charge Pump White LED Driver

PAM2701
4-Channel Regulated Charge Pump White LED Driver
Block Diagram
1μF
1μF
C1-
C1+ C2- C2+
VIN
C_IN
1μF
EN
RSET
R_SET
24KΩ _CTR0
CTR1
CTR2
1.2V Ref
Current
Setting
LED
Output
Select
1x Mode(LDO)
1.5x Charge Pump
1MHz
Oscillator
Mode
Control
VOUT
LED1
LED2
LED3
LED4
C_O
1μF
20mA
4 Current
Sink Regulators
Table 1:LED Enable Logic
CTR2
0
0
0
0
1
1
1
1
Control Lines
CTR1
0
0
1
1
0
0
1
1
CTR0
0
1
0
1
0
1
0
1
Note:1=logic high(or V_IN)
0=logic low(or GND)
- =LED output off
LED4
-
-
-
ON
-
-
ON
-
LED Outputs
LED3
LED2
-
-
-
ON
ON
-
-
-
-
ON
ON
ON
ON
ON
-
-
LED1
ON
-
-
-
ON
ON
ON
-
Power Analog Microelectronics,Inc
www.poweranalog.com
2
09/2008 Rev 1.3