BQ24075T Datasheet, PDF (8/29 Pages) Texas Instruments – 1.5A USB-Friendly Li-Ion Battery Charger and Power-Path Management IC

bq24075T
bq24079T
SLUS937 – DECEMBER 2009
SIMPLIFIED BLOCK DIAGRAM
IN
Short Detect
ILIM
USB100
USB5 00
USB-susp
EN2
EN1
EN2
VIN- LOW
VREF- ILIM
V O(REG)
VO(SC1)
Q1
CHARGEPUMP
225mV)
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OUT- SC 1
250mV
V BAT
t _DGL(SC2)
OUT- SC2
OUT
225mV
Precharge
2.25V
Fastcharge
TJ
TJ(REG)
V DPPM
Q2
VOUT
V BAT (REG)
V OUT
V LOWV
40mV
Supplement
V RCH
V _BAT(SC)
ISET
Short Detect
VBAT
BAT
SYSOFF
VIN
V _BAT + V_IN-DT
V _UVLO
V OVP
EN1
EN2
CE
TMR
V IPRECHG
VI CHG
V ISET
Dynamically
Controlled
Oscillator
t_{DGL(NO- IN)}
tDGL( PGOOD)
tBLK(OVP)
USB Suspend
Charge Control
BAT-SC
t DGL(TS)
Halt timers
Reset timers
Fast- Charge
Timer
Pre- Charge
Timer
Timer fault
V_IN
VCOLD
TS
V HOT
CHG
PGOOD
8
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