CAT4004VP2-GT3 datasheet(1/11 Pages) CATALYST

Part #	CAT4004VP2-GT3

Description	4-Channel Constant Current LED Driver with EZDim?

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Manufacturer	CATALYST [Catalyst Semiconductor]

Direct Link	http://www.catalyst-semiconductor.com

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CAT4004

1

Doc. No. MD-5024 Rev. B

Characteristics subject to change without notice

FEATURES

Four LED current sinks with tight matching

Low Dropout Driver 130mV at 30mA

No switching noise

Shutdown current < 1μA

LED current set by external resistor

Dimming via 1-wire EZDim

TM interface

Thermal shutdown protection

RoHS Compliant

8-lead 2mm x 3mm TDFN package

APPLICATIONS

LCD Display Backlight

Cellular Phones

Digital Still Cameras

Handheld Devices

ORDERING INFORMATION

Part Number

Package

Quantity

per Reel

Package

Marking

CAT4004VP2-T3

TDFN-8

(1)

3000

FT

CAT4004VP2-GT3 TDFN-8

(2)

3000

HA

Notes: (1) Matte-Tin Plated Finish (RoHS-compliant).

(2) NiPdAu Plated Finish (RoHS-compliant).

DESCRIPTION

The CAT4004 provides four matched low dropout current

sources to drive LEDs. An external resistor on RSET sets

the current in the LED channels. Each LED channel

includes an individual control loop allowing the device to

handle a wide range of LED forward voltages while still

maintaining tight current matching.

The EN/DIM logic inputs supports device enable and a

digital dimming interface for current setting of all LEDs.

Six different current dimming ratios are available.

The device is aimed at “direct drive” battery applications.

It is required that the battery or voltage source have

enough headroom to drive the LED forward voltage and

current sink (>150mV).

The device is available in a tiny 8-lead TDFN 2mm x 3mm

package with a max height of 0.8mm.

For Ordering Information details, see page 10.

PIN CONFIGURATION

TYPICAL APPLICATION CIRCUIT

8-lead TDFN Package

(Top View)

EN/DIM 1

8

VIN

GND 2

7

RSET

LED1 3

CAT4004

6

LED4

LED2 4

5

LED3

4-Channel Constant Current LED Driver with EZDim™

CAT4004

VIN

EN/DIM

RSET

GND

LED1 LED2 LED3 LED4

RSET

3.8kΩ

One wire

programming

20mA

VIN

1µF

2.4V

to

5.5V

CIN

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CAT4004VP2-GT3 Datasheet(PDF) 1 Page - Catalyst Semiconductor

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