Product category:
Power Supply ICs and Controllers
News Release from: Catalyst Semiconductor | Subject: CAT3604V
Edited by the Electronicstalk Editorial
Team on 18 December 2007
LED driver gains a fractional advantage
Fourth mode of operation at 1.33x delivers higher average efficiency, without the need for the additional capacitor required by all existing four-mode charge pumps.
New from Catalyst Semiconductor, the CAT3604V is a four-channel LED driver that provides an alternative to the industry-standard 604 with similar functionality and the added benefits of Catalyst's patented Quad-Mode switching architecture, including improved average efficiency Quad-Mode technology delivers the high efficiency levels normally associated with inductor-based LED drivers, and eliminates the associated high-profile inductors and unwanted EMI
This article was originally published on Electronicstalk on 7 Feb 2002 at 8.00am (UK)
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Most charge-pump LED drivers today offer three modes of operation corresponding to the ratio of the output voltage to the input voltage: 1x, 1.5x and 2x.
The Quad-Mode architecture of the CAT3604V adds a fourth mode of operation, 1.33x, to deliver the higher average efficiency, without the need for the additional capacitor required by all existing four-mode charge pumps.
The 1.33x fractional operating mode also reduces the input switching currents seen at the battery, minimising the overall supply noise - a critical parameter in portable devices such as cellphones.
The new CAT3604V is a four-channel charge pump with a PWM dimming interface and channel diagnostics, which include automatic detection for both short and open LED channel conditions to ensure the device maintains the highest efficiency level in all operating modes.
The CAT3604V joins the CAT3636 six-channel, CAT3644 four-channel and CAT3643 three-channel, 1-wire EZDim products in Catalyst's Quad-Mode family of LED drivers.
The CAT3604V LED driver is priced at US $0.48 each in 10,000 piece quantities.
Samples and evaluation boards are also available.
Projected lead-time for production quantities is currently 6 to 8 weeks ARO.
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