cat3604a ON Semiconductor, cat3604a Datasheet - Page 4

• Manufacturer Part Number: cat3604a
• Description: Cat3604a 4-channel Regulated Charge Pump White Led Driver
• Manufacturer: ON Semiconductor

Block Diagram
3 V to 4.2 V
Battery
V
IN
24 kW
R
+
−
SET
C
1 μF
CTR0
CTR1
CTR2
RSET
IN
VIN
EN
1.2 V Ref
Current
Output
Setting
Select
LED
Figure 2. CAT3604A Functional Block Diagram
C1−
Oscillator
1 MHz
1.5x Charge Pump
1 μF
1x mode (LDO)
C1+ C2−
http://onsemi.com
4
Mode Control
1 μF
GND
C2+
V
4 Current
Sink Regulators
LED1
LED2
LED3
LED4
OUT
20 mA
C
1 μF
OUT