M62253BGP Datasheet, PDF (1/13 Pages) Renesas Technology Corp – Charge Control IC for Li-Ion Batteries

M62253BGP
Charge Control IC for Li-Ion Batteries
REJ03F0243-0200
Rev.2.00
Sep 14, 2007
Description
M62253BGP is a charge control IC dedicated to Lithium-ion batteries. Constant current/voltage charging suitable for
Li-Ion batteries are available by utilizing on-chip current/voltage control circuits.
It also includes charge inhibit function for over discharged battery and charge control function detecting battery
temperature, allowing for easy configuration of Li-Ion battery charging circuit.
Features
• Available for 4.2 V battery
• High precision reference voltage 4.2 V ± 30 mV
• Constant current and constant voltage charging
• Charge completion detection voltage settable by external resistors
• Charging inhibit and protection function for over discharged battery
• Charging inhibit and protection function for both high and low temperature battery
• Dual LED indications monitoring charging status
• Recharging function (LED2 remains turned on after recharging)
• Delay circuit to prevent erroneous detection
Applications
Li-Ion battery charger for hand-held instruments such as cellular phones and notebook computers
Block Diagram
V_DD
C1
V_CC
LED2
LED1
4.2 V
+
−
Regulated supply
4.53 V
4.1 V⇔3.99 V
−
+
Erroneous
detection
prevention
−
+
3.07 V
+
−
1.54 V
OE
OUT
Constant current
control
ISENSE+
ISET
ISENSE-
OUT
SENSE+
OE
OUT
Constant voltage
control
VSET
VSENSE
Erroneous
detection
prevention
Erroneous
detection
prevention
Current
detection
1.49 V
3.21 V
SENSE−
V_SENSE
ADJ
T_IN
GND
C3 C2
REJ03F0243-0200 Rev.2.00 Sep 14, 2007
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