delay time for overdischarge current 2 or load short-circuiting, the HM5465A stops discharging. When battery

voltage falls below overdischarge detection voltage due to overdischarge current, the HM5465A stop

discharging by overdischarge current detection. In this case the recovery of battery voltage is so slow that if

battery voltage after overdischarge voltage detection delay time is still lower than overdischarge detection

voltage, the HM5465A shifts to power-down.

This function enables the charging of a connected battery whose voltage is 0V by self-discharge. When a

or higher is connected between B+ and B-

pins, the charging control FET gate is fixed to VDD potential. When the voltage between the gate and the

source of the charging control FET becomes equal to or higher than the turn-on voltage by the charger voltage,

the charging control FET is turned on to start charging. At this time, the discharging control FET is off and the

charging current flows through the internal parasitic diode in the discharging control FET. If the battery voltage

◼ TYPICAL APPLICATION

100ohm

C1 10nf

Battery

UP6455

Charger+

Charger-

VT

VDD

VM

VM

GND

HM5465A