BQ24072 Datasheet, PDF (8/38 Pages) Texas Instruments – 1.2A USB-FRIENDLY Li-Ion BATTERY CHARGER AND POWER-PATH MANAGEMENT IC

bq24072, bq24073
bq24074, bq24075
SLUS810A – SEPTEMBER 2008 – REVISED DECEMBER 2008...................................................................................................................................... www.ti.com
SIMPLIFIED BLOCK DIAGRAM
IN
Short Detect
ILIM
USB100
USB500
USB-susp
EN2
EN1
ITERM
bq24074
VO(SC1)
Q1
EN2
VIN- LOW
VREF- ILIM
V O(REG)
IBIAS- ITERM
CHARGEPUMP
225mV
(’72, ’73, ’75)
~3V
I TERM-floating
OUT-SC1
250mV
VBAT
t _DGL(SC2)
OUT-SC2
OUT
225mV
Precharge
2.25V
Fastcharge
TJ
TJ(REG)
V DPPM
V OUT
V BAT (REG)
V_OUT
VLOWV
40mV
Supplement
VRCH
V_BAT(SC)
Short Detect
Q2
VBAT
ISET
BAT
SYSOFF
bq24075
VIN
V_BAT + V_IN-DT
V _UVLO
V OVP
t_DGL(NO-IN)
t DGL(PGOOD)
tBLK(OVP)
Charge Control
CE
TMR
VIPRECHG
VICHG
V ISET
~100mV
EN1
USB Suspend
EN2
Dynamically
Controlled
Oscillator
Halt timers
Reset timers
Timers disabled
Fast-Charge
Timer
Pre-Charge
Timer
BAT-SC
t DGL(TS)
Timer fault
INTC
V HOT
TS
VCOLD
VDIS(TS)
TD
(bq24072,
bq24073)
CHG
PGOOD
8
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