A708YF Просмотр технического описания (PDF) - ADDtek Corp
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A708YF Datasheet PDF : 8 Pages
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Li-ion Battery Voltage Supply
A708
The A708 can work with Li-ion battery. The supply voltage of Li-ion battery ranges from 4.5V down to lower
than 3V while the white/blue LED forward voltage (VF) is in the range of 2.9V to 3.5V at 20mA current. The supply
voltage range and LED forward voltage can be set to fully utilize Li-ion battery energy. For example, if the forward
voltage of white LED is 3.2V at 20mA, the Li-ion battery can discharge until output voltage reaches 3.275V (normally
around 1% ~ 3% power left in the battery). When Li-ion battery voltage is lower than the 3.275V, the LED current
(brightness) will start to decrease.
VDD
Li-ion
Battery
Enable
LED1 LED2 LED3
VDD
EN
A708
GND
Copyright © 2007 ADDtek Corp.
6
DD076_A -- AUGUST 2007
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