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PT4121 - Step-down High Brightness LED Controller

General Description

The PT4121 is a high efficiency step-down controller.It is designed to operate in continuous conduction mode and drive single or multiple series connected LED efficiently from a voltage source higher than the total LED chain voltage.

Key Features

  • Simple low parts count.
  • Wide input voltage range: 6V to 60V.
  • High efficiency (up to 97%).
  • Single pin on/off and brightness control using DC Voltage or PWM.
  • Up to 1MHz switching frequency.
  • Adjustable Constant LED Current.
  • Typical 3% output current accuracy.
  • High-Side Current Se.

📥 Download Datasheet

Datasheet Details

Part number PT4121
Manufacturer PowTech
File Size 82.28 KB
Description Step-down High Brightness LED Controller
Datasheet download datasheet PT4121 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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PT4121 60V，Step-down High Brightness LED Controller with 2500:1 Dimming GENERAL DESCRIPTION The PT4121 is a high efficiency step-down controller.It is designed to operate in continuous conduction mode and drive single or multiple series connected LED efficiently from a voltage source higher than the total LED chain voltage. It operates with a wide input voltage from 6V to 60V and provides an externally adjustable output current. The PT4121 includes a high-side output current sense circuit, which uses an external resistor to set the nominal average output current, and a dedicated DIM input accepts either a DC voltage or PWM dimming. The PT4121 is available in SOT23-6 packages.