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UM1350 - LED Lighting Driver

General Description

The UM1350 is capable of driving single or multiple series connected LEDs efficiently from a voltage source higher than the LED voltage.

This step-down converter provides an externally adjustable output current of up to 350mA from an input supply between 6V and 30V.

Key Features

  • z Built in Thermal and Over-Current Shutdown z Internal 40V NDMOS Switch z 350mA Output Current z Single Pin On/Off and Dimming Control Using DC Voltage or PWM at VSET Pin z Internal PWM Filter z Soft-Start z High Efficiency (Up to 95%) z Wide Input Voltage Range: 6V to 30V z 40V Transient Capability z Output Shutdown z Up to 1MHz Switching Frequency z Inherent Open-Circuit LED Protection z Typical 5% Output Current Accuracy Pin Configurations Top View M: Month Code UM1350 SOT23-5 __________.

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Datasheet Details

Part number UM1350
Manufacturer Union Semiconductor
File Size 384.71 KB
Description LED Lighting Driver
Datasheet download datasheet UM1350 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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UM1350 350mA, LED Lighting Driver UM1350 SOT23-5 General Description The UM1350 is capable of driving single or multiple series connected LEDs efficiently from a voltage source higher than the LED voltage. This step-down converter provides an externally adjustable output current of up to 350mA from an input supply between 6V and 30V. It can even reach 8 watts of output power, depending on supply voltage and external components. The UM1350 consists of an output switch and a high-side output current sensing circuit that uses an external resistor to set the nominal average output current. Through applying an external control signal to the VSET pin, it can adjust the output current below the set value.