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PT4115B89E-B

30V, 1.2A Step-down High Brightness LED Driver with 5000:1 Dimming

Unspecified 

PT4115

30V, 1.2A Step-down High Brightness

LED Driver with 5000:1 Dimming

GENERAL DESCRIPTION

The PT4115 is a continuous conduction mode inductive

step-down converter, designed for driving single or

multiple series connected LED efficiently from a

voltage source higher than the total LED chain voltage.

The device operates from an input supply between 6V

and 30V and provides an externally adjustable output

current of up to 1.2A. Depending upon the supply

voltage and external components, the PT4115can

provide more than 30 watts of output power.

The PT4115 includes the power switch and a high-side

output current sensing circuit, which uses an external

resistor to set the nominal average output current, and a

dedicated DIM input accepts either a DC voltage or a

wide range of pulsed dimming. Applying a voltage of

0.3V or lower to the DIM pin turns the output off and

switches the device into a low current standby state.

The PT4115 is available in SOT89-5 and ESOP8

packages.

FEATURES

 Simple low parts count

 Wide input voltage range: 6V to 30V

 Up to 1.2A output current

 Single pin on/off and brightness control using DC

voltage or PWM

 Up to 1MHz switching frequency

 Typical 5% output current accuracy

 Inherent open-circuit LED protection

 High efficiency (up to 97%)

 High-Side Current Sense

 Hysteretic Control: No Compensation

 Adjustable Constant LED Current

 ESOP8 package for large output power application

 RoHS compliant

APPLICATIONS

 Low voltage halogen replacement LEDs

 Automotive lighting

 Low voltage industrial lighting

 LED back-up lighting

 Illuminated signs

 SELV lighting

 LCD TV backlighting

ORDERING INFORMATION

PACKAGE

SOT89-5

TEMPERATURE

RANGE

-40 oC to 85 oC

ORDERING PART

NUMBER

PT4115B89E:A type

PT4115B89E-B:B type

ESOP8

-40 oC to 85 oC

PT4115BSOH:A type

PT4115BSOH-B:B type

Note:

xxxxxX

Assembly Factory Code

Lot Number

TRANSPORT

MEDIA

Tape and Reel

1000 units

Tape and Reel

2500 units

MARKING

PT4115

xxxxxX

PT4115

xxxxxX

TYPICAL APPLICATION CIRCUIT

DC6-30V

VIN

AC12-18V

CIN

100uF

RS

0.13Ω

D

LED

3W

L

68uH

VIN

CSN

SW

DIM

PT4115

GND

China Resources Powtech (Shanghai) Limited

PT4115_DS Rev EN_2.9

WWW.CRPOWTECH.COM

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