CAT32TDI-GT3 ON Semiconductor, CAT32TDI-GT3 Datasheet

CAT32TDI-GT3

Manufacturer Part Number

CAT32TDI-GT3

Description

IC WHITE LED DRIVER TSOT-23-6

Manufacturer

ON Semiconductor

Type

Backlight, White LEDr

Datasheet

1.CAT32TDI-T3.pdf (11 pages)

Specifications of CAT32TDI-GT3

Topology

PWM, Step-Up (Boost)

Number Of Outputs

Internal Driver

Yes

Type - Primary

Backlight

Type - Secondary

White LED

Frequency

800kHz ~ 1.6MHz

Voltage - Supply

2 V ~ 7 V

Mounting Type

Surface Mount

Package / Case

TSOT-23-6, TSOT-6

Operating Temperature

-40°C ~ 85°C

Current - Output / Channel

40mA

Internal Switch(s)

Yes

Efficiency

83%

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Voltage - Output

Lead Free Status / Rohs Status

Details

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

CAT32TDI-GT3

Manufacturer:

ON Semiconductor

Quantity:

Company:

H&T Electronics

Part Number:

CAT32TDI-GT3

Quantity:

1 989

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Download datasheet (190Kb)

CAT32

CMOS White LED Driver

Description

output current. Operation at a constant switching frequency of

1.2 MHz allows the device to be used with very small value external

inductor and ceramic capacitors.

(LEDs) connected in series and provides the necessary regulated current

to control the brightness and the color purity. An external resistor R

controls the output current level. LED currents of up to 40 mA can be

supported over a wide range of input supply voltages from 2 V to 7 V,

making the device ideal for battery−powered applications.

in series. Series drive provides inherent current matching.

a pulse width modulation (PWM) signal. The shutdown input pin

allows the device to be placed in power−down mode with “near zero”

quiescent current.

includes detection circuitry to ensure protection against open−circuit

load fault conditions.

TSOT−23 package.

Features

•

Applications

•

March, 2010 − Rev. 4

The CAT32 is a DC/DC step up converter that delivers a regulated

The CAT32 is targeted to drive multiple white light−emitting diodes

A high voltage output stage allows up to 4 White LEDs to be driven

LED dimming can be done by using a DC voltage, a logic signal, or

In addition to overcurrent limiting protection, the device also

The device is available in a low profile (1 mm max height) 6−lead

Compliant

Low Quiescent Ground Current (0.5 mA Typical)

Power Efficiency Over 80%

Compatible Pinout with LT1932

Adjustable Output Current (up to 40 mA)

High Frequency 1.2 MHz Operation

Input Voltage Operation down to 2.0 V

Low Resistance (0.5 W) High Voltage Power Switch

Drives up to 4 White LEDs in Series

Shutdown Current Less than 1 mA

Load Fault Protection Against Open−circuits

Low Value External Components

Low Profile (1 mm) TSOT−23 6−lead Package

These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS

Color LCD and Keypad Backlighting

Cellular Phones

Handheld Terminals

Digital Cameras

PDAs/Games

Portable MP3 Players

SET

CAT32TDI−T3

CAT32TDI−GT3

Device

LL = CAT32TDI−T3

VF = CAT32TDI−GT3

Y = Production Year (Last Digit)

M = Production Month (1−9, A, B, C)

ORDERING INFORMATION

GND

LED

MARKING DIAGRAMS

LLYM

PIN CONNECTIONS

1 mm Maximum Height

http://onsemi.com

= 250°C/W (free air)

CASE 419AF

TD SUFFIX

(Top View)

TSOT−23

(Pb−Free)

TSOT−23

Package

Publication Order Number:

VFYM

VIN

SHDN

RSET

Tape & Reel

Shipping

3,000/

CAT32/D

Related parts for CAT32TDI-GT3

CAT32TDI-GT3 Summary of contents

Page 1

... SW GND LED TSOT− Maximum Height q = 250°C/W (free air) JA (Top View) MARKING DIAGRAMS LLYM LL = CAT32TDI− CAT32TDI−GT3 Y = Production Year (Last Digit Production Month (1− ORDERING INFORMATION Device Package CAT32TDI−T3 TSOT−23 (Pb−Free) CAT32TDI−GT3 TSOT−23 (Pb−Free) ...

Page 2

Typical Application Circuit VIN 2 4 4.7 mF PWM DIMMING CONTROL TSOT−23 Pin Numbers Figure 1. Li−Ion Driver for Four High−Brightness White LEDs Table 1. PIN DESCRIPTION Pin Number Pin Number SOT23 TDFN ...

Page 3

Table 2. ABSOLUTE MAXIMUM RATINGS V , LED, SHDN voltage IN SW voltage RSET voltage Storage Temperature Range Junction Temperature Lead Soldering Temperature (10 secs) ESD Rating – Human Body Model Stresses exceeding Maximum Ratings may damage the device. Maximum ...

Page 4

25° AMB 600 500 400 300 200 INPUT VOLTAGE (V) Figure 2. Quiescent Current vs. Input Voltage 2.0 1.6 1.2 0.8 0 INPUT ...

Page 5

25° AMB 1.0 0.8 0.6 0.4 0 INPUT VOLTAGE (V) Figure 8. Switch Resistance vs. Input Voltage 300 250 200 150 100 ...

Page 6

Operation The CAT32 device is a high efficiency, constant frequency, current regulating boost converter. The device includes a switch and an internally compensated loop for the regulation of the LED current. Operation can be best understood by examining the block ...

Page 7

... For the best accuracy better resistor is SET recommended. Table 8 shows several typical 1% R values. http://onsemi.com 7 Vendor Web Panasonic www.panasonic.com 714.373.7334 Murata www.murata.com 770.436.1300 Taiyo Yuden www.t−yuden.com 408.573.4150 Sumida www.sumida.com 847.956.0666 Part Supplier ON Semiconductor www.onsemi.com 800.282.9855 Zetex , to 225 times the value of LED SET ...

Page 8

Table 8. R RESISTOR VALUES SET I (mA) LED For other LED current values, use the following equation to choose R . SET 0 255 SET I LED Most white ...

Page 9

TSOT−23 packages.) VIN C1 4 DIMMING CONTROL Figure 16. Two LEDs with DC Level Dimming Control L 6.8 mH VIN 1 6 VIN CAT32 C1 5 SHDN 4.7 ...

Page 10

TOP VIEW SIDE VIEW Notes: (1) All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC MO-193. PACKAGE DIMENSIONS TSOT−23, 6 LEAD CASE 419AF−01 ISSUE O SYMBOL MIN A A1 0.01 A2 ...

Page 11

... All packages are RoHS−compliant (Lead−free, Halogen−free). 2. The standard lead finish is NiPdAu. 3. The device used in the above example is a CAT32TDI−GT3 (TSOT−23, Industrial Temperature Range, NiPdAu, Tape & Reel, 3,000 / Reel). 4. For additional package and temperature options, please contact your nearest ON Semiconductor Sales office. ...

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