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HM5669 Datasheet step-up DC/DC converter

Manufacturer: H&M Semiconductor

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General Description

HM5669 develops a step-up DC/DC converter that delivers an accurate constant current for driving LEDs.

Operating at a fixed switching frequency of 1MHz allows the device to be used with small value external ceramic capacitors and inductor.

The LED current is programmable through the external resistor.

Overview

HM5669 General.

Key Features

  • Input voltage range: 2.8 to 30V.
  • Switch current limit: 4A.
  • Drives LED strings up to 30V.
  • 1MHz fixed frequency minimizes the external components.
  • 20kHz~1MHz wide dimming frequency range for EN/PWM pin.
  • Internal softstart limits the inrush current.
  • Open LED over voltage protection.

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