Product category: Power Supply ICs and Controllers
News Release from: Maxim Integrated Products | Subject: MAX1583
Edited by the Electronicstalk Editorial Team on 14 April 2004
Single chip powers up cellphone camera
flashes
The MAX1583 is a high-efficiency, step-up DC/DC convertor that drives up to five white LEDs in series with a high constant current to provide camera flash/strobe power handheld devices.
The MAX1583 is a high-efficiency, step-up DC/DC convertor that drives up to five white LEDs in series with a high constant current to provide camera flash/strobe power in cellphones, PDAs and other handheld devices The MAX1583 integrates a 1MHz, 24V, step-up DC/DC convertor and a high-voltage, low-dropout (LDO) current regulator
This article was originally published on Electronicstalk on 27 Aug 2002 at 8.00am (UK)
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It operates from input voltages of 2.6 to 5.5V.
Two logic inputs control four modes of operation: shutdown mode (0.5uA maximum); movie mode (programmable up to 100mA); precharge mode for charging a reservoir capacitor up to 24V while the LEDs are off; and strobe mode for firing the flash with a regulated current (programmable up to 300mA) during an exposure.
The MAX1583 also features overvoltage and thermal shutdown protection.
The MAX1583 is available in a space-saving 3 x 3mm, 10-pin TDFN package screened for the extended temperature range (-40 to +85C).
It is available with three preset input-current limits, MAX1583X (1A), MAX1583Y (500mA), and MAX1583Z (250mA).
Prices start at $1.70 (1000-up, FOB USA).
An evaluation kit is available to speed designs.
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