CAT3604V

© Catalyst Semiconductor, Inc.

1

Doc. No. MD-5029, Rev. B

Characteristics subject to change without notice

4-Channel Quad-Mode™ LED Driver

with Open/Short LED Detection

FEATURES

Quad-mode charge pump: 1x, 1.33x, 1.5x, 2x

Drives up to 4 LEDs at 30mA each

Pin compatible with industry standard ‘604

Open/short LED automatic detection

Power efficiency up to 92%

High resolution PWM dimming

Low noise supply ripple in all modes

Soft start and current limiting

Short circuit and thermal overload protection

16-Pad TQFN package, 4mm x 4mm

APPLICATION

LCD Display Backlight

Cellular Phones

Digital Still Cameras

Handheld Devices

ORDERING INFORMATION

Part Number

Package Qty per Reel Marking

CAT3604VHV4-GT2 TQFN-16

(1)

4 x 4mm

2000

CDAK

CAT3604VHV4-T2

TQFN-16

4 x 4mm

2000

CDAF

Note:

(1) NiPdAu Plated Finish, RoHS compliant

For other finishes, please contact factory

DESCRIPTION

The CAT3604V is a high efficiency Quad-Mode

TM

fractional charge pump that can drive up to four LEDs

with input supply voltages as low as 2.5V.

An external RSET resistor is used to control the LED

channel brightness while channel diagnostics include

automatic detection for both short and open LED

channel conditions, ensuring the CAT3604V maintains

the highest efficiency level in all operating modes.

Each operating mode uses a constant high frequency

switching scheme which allows the use of small form

factor external ceramic capacitors while delivering

excellent low noise input supply ripple up to 5.5 volts.

The EN input control supports direct PWM dimming

and can accommodate dimming frequencies in excess

of 10kHz thereby providing extremely high resolution

brightness levels.

The device is available in the 16-pad low profile

0.8mm thin QFN (4mm x 4mm).

PIN CONFIGURATION

TYPICAL APPLICATION CIRCUIT

For Ordering Information details, see page 14.

GND

2.4V

to

5.5V

20mA

4.02kΩ

ON OFF

LED1

LED2

LED3

LED4

RSET

EN

CAT3604V

VIN

VOUT

1µF

1µF

C1-

C1+

C2-

C2+

1µF

1µF

16

15

14

13

12

11

10

9

1

2

3

4

56

7

8

EN

NC

NC

NC

GND

C2+

C2-

C1-

LED1 LED2 LED3 LED4

RSET VOUT

VIN

C1+

GND