PT4115 Datasheet PDF – 30V, 1.2A, Step-down LED Driver

Part Number: PT4115

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

Package: SOT89-5 , ESOP8 Pin Type

Manufacturer: PowTech

See the preview image and the file for more information.

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PT4115 image


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 IC can 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.

PT4115 Pinout

PT4115 pinout


1. Simple low parts count

2. Wide input voltage range: 6V to 30V

3. Up to 1.2A output current

4. Single pin on/off and brightness control  using DC voltage or PWM

5. Up to 1MHz switching frequency

6. Typical 5% output current accuracy

7. Inherent open-circuit LED protection

8. High efficiency (up to 97%)

9. High-Side Current Sense

10. Hysteretic Control: No Compensation

11. Adjustable Constant LED Current

12. ESOP8 package for large output power application

13. RoHS compliant


PT4115 circuit

Other data sheets are available within the file: PT4115B89E, PT4115B89E-B, PT4115BSOH, PT4115BSOH-B

PT4115 Datasheet PDF Download