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A708YFT Datasheet(PDF) 6 Page - ADDtek Corp |
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A708YFT Datasheet(HTML) 6 Page - ADDtek Corp |
6 / 8 page A708 Copyright © 2007 ADDtek Corp. 6 DD076_A -- AUGUST 2007 Li-ion Battery Voltage Supply 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. Enable A708 EN LED2 VDD GND LED1 LED3 VDD Li-ion Battery |
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