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LM3842 - step-down constant current LED driver

Datasheet Summary

Description

The LM3842 is a step-down constant current LED driver.

When the input voltage down to lower than LED forward voltage, then LM3842 run into LDO mode.

Features

  • n n n n n n n n n n n n Efficiency up to 93% 180 μA(TYP. ) Quiescent Current Output Current: Up to 1A Internal Synchronous Rectifier 1.5MHz Switching Frequency Soft Start Under-Voltage Lockout Short LED Protection Open LED Protection Thermal Shutdown 5-pin Small SOT23-5 Packages Pb-Free Package General.

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Datasheet preview – LM3842

Datasheet Details

Part number LM3842
Manufacturer ETC
File Size 367.53 KB
Description step-down constant current LED driver
Datasheet download datasheet LM3842 Datasheet
Additional preview pages of the LM3842 datasheet.

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Full PDF Text Transcription

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LM3842 Features n n n n n n n n n n n n Efficiency up to 93% 180 μA(TYP.) Quiescent Current Output Current: Up to 1A Internal Synchronous Rectifier 1.5MHz Switching Frequency Soft Start Under-Voltage Lockout Short LED Protection Open LED Protection Thermal Shutdown 5-pin Small SOT23-5 Packages Pb-Free Package General Description The LM3842 is a step-down constant current LED driver. When the input voltage down to lower than LED forward voltage, then LM3842 run into LDO mode. The LM3842 supports a range of input voltages from 2.5V to 6.0V, allowing the use of a single Li+/Li-polymer cell, 3AA or 4AA cell, USB, and other standard power sources. The FB voltage is only 0.1V to achieve high efficiency.
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