Product category:
Power Supply ICs and Controllers
News Release from: Catalyst Semiconductor | Subject: CAT3604
Edited by the Electronicstalk Editorial
Team on 25 August 2004
LED driver promises flicker-free
backlighting
The CAT3604 regulated charge pump is designed to deliver uniform, flicker-free backlighting for LCD displays and keypads.
Catalyst Semiconductor has expanded its family of solid state illumination products with a new high efficiency white LED driver The CAT3604 regulated charge pump is designed to deliver uniform, flicker-free backlighting for LCD displays and keypads
This article was originally published on Electronicstalk on 18 Dec 2007 at 8.00am (UK)
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Optimised for use with lithium ion systems, the CAT3604 maximises power transfer by achieving very high efficiencies of up to 93%.
Each output channel is current regulated to provide precise matching of up to four LEDs, guaranteeing even brightness control across the panel.
Soft start, combined with a unique fractional charge pump topology ensures stable output voltage over the life of the battery by automatically switching between 1x LDO mode and 1.5x boost mode.
Digital inputs provide the user with full control of each LED channel for dimming, or system shutdown, where the device draws less than 1uA.
A 1MHz fixed frequency control scheme enables the use of small external capacitors.
The combination of the CAT3604's high efficiency, low noise and space saving 4 x 4mm thin QFN package make it the ideal white LED driver for cellphones, smart phones, PDAs, digital cameras, and portable MP3 players.
"Stable, efficient backlighting is critical to optimise the performance of today's portable LCD panels".
"The CAT3604 white LED driver leverages our expertise in mobile imaging system power management, to supply flicker-free regulation with maximum power transfer", said Jamie White, Senior Technical Marketing Manager.
The CAT3604 is available in a space-saving 4 x 4mm 16-lead thin QFN package with a maximum height of 0.8mm; price in 1000 piece quantities is $1.68.
The CAT3604 is available in environment friendly "green" packages that are halogen and lead free.
Samples are available now; production quantities will be available in September, 2004.
The CAT3604EVAL1 evaluation board and application note (AN20) are available to facilitate designs.
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