Product category: Power Supply ICs and Controllers
News Release from: Maxim Integrated Products | Subject: MAX1573
Edited by the Electronicstalk Editorial Team on 12 May 2003
Top efficiency for compact white LED
driver
The MAX1573 is a highly efficient white LED driver in a tiny, low-profile UCSP.
The MAX1573 is a highly efficient white LED driver in a tiny, low-profile UCSP This device drives up to four white LEDs with a regulated, constant current for uniform intensity
This article was originally published on Electronicstalk on 27 Aug 2002 at 8.00am (UK)
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By using an adaptive 1x/1.5x charge pump and ultralow- dropout-current regulators on the low-side feedback, the MAX1573 maintains the highest possible efficiency over the full, single-cell lithium (Li+) battery input-voltage range.
To ensure uniform backlighting of colour LCDs, it also matches brightness to within 0.3%.
This charge pump is an ideal choice when generating white LED supplies for cellphones, PDAs, and digital still cameras, camcorders, and other hand-held devices with colour displays.
The 1MHz fixed-frequency switching allows for tiny, external components.
The regulation scheme is optimised to ensure low EMI and low input ripple.
The MAX1573 features digital logic or analogue PWM LED-dimming control, soft-start to limit inrush current, and complete input-to-output disconnect during shutdown (0.1uA shutdown current).
The MAX1573 is available in a space-saving, 2.1 x 2.1 x 0.6mm, 14-ball UCSP, screened for the extended-industrial temperature range (-40 to +85C).
Prices start at $2.09 (1000-up, FOB USA).
An evaluation kit is available to speed designs.
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