Product category:
Power Supply ICs and Controllers
News Release from: Catalyst Semiconductor | Subject: CAT3614
Edited by the Electronicstalk Editorial
Team on 14 February 2006
Backlight driver claims reduced flicker
Targeted at portable backlight applications, the CAT3614 drives up to four white LEDs across inputs from 2.5 to 5.5V.
New from Catalyst Semiconductor, the CAT3614 is a tiny 3 x 3mm, low-noise LED driver with a single-wire EZDim interface Targeted at portable backlight applications, the CAT3614 drives up to four white LEDs across inputs from 2.5 to 5.5V
This article was originally published on Electronicstalk on 7 Feb 2002 at 8.00am (UK)
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Battery life is maximised with the use of an automatic 1x/1.5x charge pump which delivers up to 91% power efficiency.
A "zero" current-shutdown limits battery drain in shutdown mode.
Chip enable, shutdown and LED dimming are each done using a new single-wire digital interface.
This simple serial interface eliminates the need for PWM or multiple-wire control methods.
LED current can be controlled in 32 accurate steps of 1mA each.
Unlike competing devices, the CAT3614's current regulation method reduces flicker and maintains backlight integrity during battery spikes - a common problem in portable systems using media drive, LAN or audio power amps.
Further improvements in noise reduction are made by eliminating the LED current setting resistor, which can couple noise during cellphone data transmission.
A tiny RoHs-compliant, 3 x 3mm TDFN package, low external parts count and high fixed frequency operation all contribute to the reduction of system board area.
The CAT3614 is offered in RoHs compliant, environment friendly "green and gold" packages that are halogen and lead free.
Pricing in 1000-piece quantities is $0.94.
Samples, evaluation kits and production quantities are available at the time of this publication.
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