BQ24070 Datasheet, PDF (8/26 Pages) Texas Instruments – SINGLE-CHIP CHARGE AND SYSTEM POWER-PATH MANAGEMENT IC

bq24070
SLUS694A – MARCH 2006 – REVISED MARCH 2006
FUNCTIONAL BLOCK DIAGRAM
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IN
GND
500 Ω
100 mA /
500 mA
V_SET
+
V_IO(AC)
AC Charge
Enable
V_{I (SNS)}
V_O(OUT)
+
V_{O(OUT−REG)}
Short−Circuit Recovery
BAT
Short−Circuit
Recovery
Q1
1 kΩ Fault
Recovery
10 mA
V_O(OUT)
3.3 V
I_(SNS)
Q2
V_I(BAT)
V_I(ISET1)
OUT
V_REF
BAT
ISET1
TMR
V_{O(BAT−REG)}
UVLO
Oscillator
V_I (OUT)
V_I(BAT)
+
V_{O(BAT−REG)}
V_O(OUT)
V_{I(ISET1) +}
Fast Precharge
DPPM
DPPM
+ ^{I(DPPM) Scaling}
+
1V
V_(HTF)
I_(TS)
TS
1V
V_(LTF)
V_SET
*
V_DPPM +
Disable−
T_J
+ ^Sleep
T_J(REG)
Thermal
Shutdown
Suspend
*
V_I(BAT)
V_O(OUT)
BAT
Charge
Enable
60 mV
+
200 mV
+
MODE
CE
VSS
280 kΩ
Power Source Selection
V_{O(BAT−REG)}
V_BAT
V_BAT
V_I(ISET1)
V_BAT
V_IN
*
*
V_(SET)
*
*
Recharge
Precharge
Term
Sleep
* _{Signal Deglitched}
Charge
Control
Timer
and
Display
Logic
AC Charge Enable
BAT Charge Enable
500 mA/ 100 mA
Fast Precharge
1C − 500 mA
C/S − 100 mA
ISET2
PG
GND
STAT1
STAT2
UDG−04084
8
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