DRV134UA/1K

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