Use A Boost Converter To Create An Auto-Dimmable LED Flashlight

Focus:

A boost converter automatically dims an LED flashlight when battery voltage is low, providing users with a warning about the need for battery replacement and extending battery life.

What you’ll learn:

• How to automatically dim an LED flashlight as battery voltage falls
• How to build a boost converter with automatic dimming for powering an LED flashlight

Notes:

ED's Ideas For Design

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Author & Publication:

Jianwen Shao, applications engineer, STMicroelectronics, Schaumberg, Ill., Electronic Design, Jul 24 2008

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