M62253BGP Datasheet, PDF (5/13 Pages) Renesas Technology Corp – Charge Control IC for Li-Ion Batteries

M62253BGP
(6) Regulated power supply block
Regulated 4.53 V is provided at V_DD terminal. Detecting battery temperature is done by this regulated voltage
together with external resistor and thermistor.
(7) Output block
External PNP transistor should be connected to OUT terminal because of an opened collector output circuit
configuration.
Maximum output current is 30 mA, so charging can be done with charging current up to 30 mA multiplied by hFE
of external transistor.
(8) LED driving block
Output configuration of this block is opened collector by NPN Tr.
Charging states are indicated by using two LEDs. LED1 is on during charge, LED2 is on at the completion of
charge, where "on" refers to turning on of LED, "off" turning off of LED.
LED indication changes from "charge" to "completion of charge" 2.21 second (C2 = 2.2 µF) after the completion is
confirmed by monitoring the charging current.
Once charge completion is indicated (LED1 = OFF, LED2 = ON), LED1 continues to be OFF, and LED2 continues
to be ON until non-connection of battery is confirmed at T_IN terminal. Such is also the case with the period for
recharging.
REJ03F0243-0200 Rev.2.00 Sep 14, 2007
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