BQ25050 Datasheet, PDF (6/28 Pages) Texas Instruments – 1A, Single-Input, Single Cell Li-Ion Battery Charger with 50-mA LDO, External Power Path

bq25050
SLUSA33 – MARCH 2010
SIMPLIFIED BLOCK DIAGRAM
DEVICE INFORMATION
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LDO
VIN
IMON
Q1
Q2
Charge
Pump
1.5V
+ _IIN(REG)
VIN_DPM
+
125C
TJ
VOUT(REG)
Precharge
Current Source
2.9V
External Power
Path Control
Mode
OUT
BAT
Charge
Pump
CTRL
150mV
TERMINATION
COMPARATOR
+
V_IN-DPM
Enable
Digital
Decode
260k
OVP Comparator
V_OVP
+
V_IN
VREF
VREF
+ ^{TS COLD}
+ ^{TS HOT}
ILIM
VREF
V_OUTMIN
External Power Path
Control Mode
CHARGE
CONTROL
TS Current
Source Control
STATUS
OUTPUT
DISABLE
Sleep Comparator
75mV
V _IN
V_BAT
V_OUTMIN Enable
Comparator
V_BAT
3.5V
TS
VSS
VOUT(MIN)
+
BGATE
/CHG
6
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