CAT4137 datasheet(1/14 Pages) CATALYST

部品番号	CAT4137

部品情報	CMOS Boost Converter - White LED Driver

Download	14 Pages

Scroll/Zoom	100%

メーカー	CATALYST [Catalyst Semiconductor]

ホームページ	http://www.catalyst-semiconductor.com

Logo

1 / 14 page

CAT4137

1

Doc. No. MD-5012 Rev. B

Characteristics subject to change without notice

CMOS Boost Converter – White LED Driver

FEATURES

Drives up to 5 White LEDs from 3V

Power Efficiency up to 87%

Low Quiescent Ground Current 0.1mA

Adjustable Output Current (up to 30mA)

High Frequency 1MHz Operation

“Zero” current shutdown mode

Operates down to 2V (from two AA batteries)

Soft start power-up

Open LED low power mode

Automatic shutdown at 1.9V (UVLO)

Thermal shutdown protection

Thin SOT23 5-Lead (1mm max height)

APPLICATIONS

LCD Backlighting

Cellular Phones

Handheld Devices

Digital Cameras

ORDERING INFORMATION

Part Number

Package

Quantity

per Reel

Package

Marking

CAT4137TD-T3

TSOT23-5

(1)

3000

LX

CAT4137TD-GT3

TSOT23-5

(2)

3000

UE

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

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

DESCRIPTION

The CAT4137 is a DC/DC step-up converter that

delivers a regulated output current. Operation at a

constant switching frequency of 1MHz allows the

device to be used with small value external ceramic

capacitors and inductor.

The device drives a string of white LEDs connected

in series and provides the regulated current to control

the LEDs with inherent uniform brightness and

matching. An external resistor R1 sets the output

current and allows up to 30mA current to be

supported over a wide range of input supply voltages

from 2.2V to 5.5V, making the device ideal for

battery-powered applications.

LED dimming can be done by using a DC voltage, a

logic signal, or a pulse width modulation (PWM)

signal. The shutdown control pin allows the device to

be placed in power-down mode with “zero” quiescent

current.

In addition to thermal protection and overload current

limiting, the device also enters a very low power

operating mode during “Open LED” fault conditions.

The device is housed in a low profile (1mm max

height) 5-lead thin SOT23 package for space critical

applications.

For Ordering Information details see page 15.

PIN CONFIGURATION

TSOT-23 5-Lead

1mm max height

(Top View)

TYPICAL APPLICATION CIRCUIT

VIN

CAT4137

VIN

LD

VOUT

R1

15Ω

VFB = 300mV

1µF

C1

0.22µF

C2

FB

SHDN

SW

GND

ON

22µH

OFF

2.2 to

5.5V

L: Murata LQH32CN220

D: Central CMDSH2-3 (rated 30V)

VIN

FB

2

3

1

SHDN

5

4

SW

GND

同様の部品番号 - CAT4137

メーカー	部品番号	データシート	部品情報
Catalyst Semiconductor	CAT4137	867Kb / 28P	Catalyst Semiconductor
ON Semiconductor	CAT4137	179Kb / 16P	CMOS Boost Converter - White LED Driver February, 2010 ??Rev. 2
	CAT4137	170Kb / 15P	CMOS Boost Converter - White LED Driver November, 2011 ??Rev. 3
	CAT4137TD-GT3	251Kb / 16P	CMOS Boost Converter - White LED Driver Doc. No. MD-5012 Rev. C
	CAT4137TD-GT3	179Kb / 16P	CMOS Boost Converter - White LED Driver February, 2010 ??Rev. 2

More results

同様の説明 - CAT4137

メーカー	部品番号	データシート	部品情報
Catalyst Semiconductor	CAT37	168Kb / 13P	CMOS White LED Driver Boost Converter
ON Semiconductor	CAT37	149Kb / 11P	CMOS White LED Driver Boost Converter February, 2010 ??Rev. 21
	CAT37TDI-T3	187Kb / 13P	CMOS White LED Driver Boost Converter Doc. No. MD-5005 Rev. V
	CAT4137TD-T3	251Kb / 16P	CMOS Boost Converter - White LED Driver Doc. No. MD-5012 Rev. C
	CAT4137	170Kb / 15P	CMOS Boost Converter - White LED Driver November, 2011 ??Rev. 3
Catalyst Semiconductor	CAT37	557Kb / 12P	CMOS White LED Driver Boost Converter
ON Semiconductor	CAT4137	179Kb / 16P	CMOS Boost Converter - White LED Driver February, 2010 ??Rev. 2
Texas Instruments	CAT37	248Kb / 13P	[Old version datasheet] CMOS White LED Driver Boost Converter
ON Semiconductor	CAT4237	279Kb / 13P	High Voltage CMOS Boost White LED Driver February, 2010 ??Rev. 2
Catalyst Semiconductor	CAT4237	533Kb / 13P	High Voltage CMOS Boost White LED Driver