CAT3604 Datasheet, PDF (4/11 Pages) Catalyst Semiconductor – 4-Channel Regulated Charge Pump White LED Driver

Block Diagram
CAT3604
1 μF
1 μF
C1−
C1+ C2−
C2+
Battery ⁺
V_IN −
3 V to 4.2 V
VIN
C_IN
1 μF
EN
R_SET
24 kW
RSET
CTR0
CTR1
CTR2
1x mode (LDO)
1.5x Charge Pump
V_OUT
1 MHz
Oscillator
1.2 V Ref
Current
Setting
LED
Output
Select
Mode Control
LED1
LED2
LED3
LED4
4 Current
Sink Regulators
GND
Figure 2. CAT3604 Functional Block Diagram
C_OUT
1 μF
20 mA
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