CAT3604

http://onsemi.com

2

Figure 1. Typical Application Circuit

GND

Battery

20 mA

LED2

LED3

LED1

LED4

RSET

CAT3604

VIN

VOUT

C1−

C1+

C2−

C2+

1 μF

EN

EN

CTR0

Control 0

Control 1

Control 2

CTR1

CTR2

1 μF

1 μF

24 kW

1 μF

+

−

3 V to 4.2 V

Table 1. PIN DESCRIPTION

Pin #

Name

Function

1

EN

Enable input, active HIGH

2

CTR0

Digital control input 0

3

CTR1

Digital control input 1

4

CTR2

Digital control input 2

5

RSET

The LED output current is set by the current sourced out of the RSET pin

6

VOUT

Charge pump output connected to the LED anodes

7

VIN

Supply voltage

8

C1+

Bucket capacitor 1 terminal

9

C1

Bucket capacitor 1 terminal

10

C2

Bucket capacitor 2 terminal

11

C2+

Bucket capacitor 2 terminal

12

GND

Ground reference

13

LED4

LED 4 cathode terminal

14

LED3

LED 3 cathode terminal

15

LED2

LED 2 cathode terminal

16

LED1

LED 1 cathode terminal

Pad

GND Pad

Ground reference