Product category:
Power Supply ICs and Controllers
News Release from: Prema Semiconductor | Subject: PR4402
Edited by the Electronicstalk Editorial
Team on 23 April 2007
Boost driver does more with single cells
LED boost driver is the latest member of a family of devices for operating white LEDs from a single battery cell.
New from Prema Semiconductor, the PR4402 0.9V LED boost driver is the latest member of a family of devices for operating white LEDs from a single battery cell Whereas the existing PR4401 is best suited for LED currents up to 20mA, the PR4402 is capable of 40mA
This article was originally published on Electronicstalk on 8 May 2007 at 8.00am (UK)
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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.
The current is set by the inductor value, resulting in a low number of external components.
Applications are pocket torches, key ring pendants or headlights and LCD backlighting in single-cell devices like MP3 players.
Single-cell battery operation is very attractive.
It allows design of smaller and lightweight products at lower cost.
In multiple-cell operation using rechargeable batteries, one cell can be destroyed by a deep discharge.
With the PR4401/4402, the driven LED current is almost independent from the supply voltage, which guarantees a constant brightness even with a discharging battery.
PR4401 and PR4402 samples are available on request in SOT23 packages.
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