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Schematic diagram of a 1-cell or 2-cell powered flashlight
Source: InternetPublisher:宋元浩 Keywords: Battery powered Updated: 2012/08/26
IES is an independent company from PHILIPS Semiconductor in Australia. It has been designing LED drivers for 25 years. Currently, it has launched a two-stage LED driver for LED flashlights with an operating voltage of 1"3.5V and an average driving current of 250mA. , peak current is 500mA, price is less than $0.3. SOT23 package 
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