Product category:
Analogue and Mixed Signal ICs
News Release from: Prema Semiconductor | Subject: Prema Semiconductor PR4402
Edited by the Electronicstalk Editorial
Team on 08 May 2007
White LEDs operated from one battery
cell
The one-cell battery operation of Prema Semiconductor's PR4402 allows smaller and light weighted products at lower cost.
Prema Semiconductor's PR4402 is the next IC in a family of 0.9V LED boost drivers, operating white LEDs from one battery cell While the PR4401 is best suited for LED currents of up to 20mA, the PR4402 is capable of 40mA
This article was originally published on Electronicstalk on 30 Jun 2008 at 8.00am (UK)
Related stories
LED driver handles wide voltage range
An optional external temperature sensor reduces the output current at high temperatures and protects the LEDs from overheating.
The current is set by the inductor value, resulting in a low number of external components.
Applications include pocket torches, key ring pendants or head lights and LCD back lighting in single-cell devices like MP3 players.
The one-cell battery operation allows smaller and light weighted products at lower cost.
In multiple-cell operation of rechargeable batteries often one cell can be destroyed by a deep discharge.
With the PR4401 / PR4402 there is no more reason for using several battery cells or for implementing the traditional light bulb.
The driven LED current is almost independent from the supply voltage, which guarantees a constant brightness even with a discharging battery.
• Prema Semiconductor: contact details and other news
• Email this article to a colleague
• Register for the free Electronicstalk email newsletter
• Electronicstalk Home Page
Search the Pro-Talk network of sites
