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UM1361S - Hysteretic Buck High Brightness LED Driver

Datasheet Summary

Description

The UM1361S is a PWM step-down converter with internal power switch, designed for driving single or multiple series connected LEDs efficiently from a voltage source higher than the LED voltage.

Features

  • z Hysteretic Control with High Side Current Sensing z Integrated 40V 0.5Ω NDMOS z > 90% Efficiency z Wide Input Voltage Range: 6V to 40V z ± 5% LED Current Accuracy z Adjustable Constant LED Current z Analog or PWM Control Signal for PWM Dimming z Over Temperature, Open Circuit LED Protection z Up to 1MHz Switching Frequency z Pb-Free SOT23-5 Package ________________________________________________________________________ http://www. union-ic. com Rev.06 May.2016 1/13 Pin Configurations Top V.

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Datasheet Details

Part number UM1361S
Manufacturer UniON Semiconductor
File Size 431.51 KB
Description Hysteretic Buck High Brightness LED Driver
Datasheet download datasheet UM1361S Datasheet
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Full PDF Text Transcription

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UM1361S Hysteretic Buck High Brightness LED Driver with Internal Switch UM1361S SOT23-5 General Description The UM1361S is a PWM step-down converter with internal power switch, designed for driving single or multiple series connected LEDs efficiently from a voltage source higher than the LED voltage. The device operates from an input supply between 6V and 40V and employs hysteretic control with a high side current sense resistor to set the constant output current up to 1A. The device is well suited for applications requiring a wide input range. The high side current sensing and an integrated current sensing circuitry minimize the number of external components while delivering an accurate average output current.
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