bq24070
bq24071
www.ti.com
SLUS694B–MARCH 2006–REVISED AUGUST 2006
FUNCTIONAL BLOCK DIAGRAM
Short−Circuit Recovery
500 Ω
BAT
Short−Circuit
Recovery
V
O(OUT)
OUT
100 mA /
Q1
IN
500 mA
V
1 kΩ Fault
Recovery
3.3 V
REF
10 mA
V
SET
+
I
(SNS)
V
IO(AC)
Charge
Enable
V
I(BAT)
AC
Q2
V
I (SNS)
BAT
V
O(OUT)
O(OUT−REG)
+
GND
V
V
I(ISET1)
ISET1
UVLO
V
O(BAT−REG)
TMR
Oscillator
V
I(BAT)
+
V
(OUT)
I
V
O(BAT−REG)
V
I(ISET1)
+
V
O(OUT)
Fast Precharge
BAT
DPPM
Charge
Enable
V
DPPM
SET
I
(DPPM)
Scaling
+
V
+
DPPM
60 mV
Disable−
Sleep
+
V
T
J
I(BAT)
+
+
+
1 V
V
V
T
O(OUT)
(HTF)
J(REG)
*
200 mV
I
(TS)
Suspend
Thermal
Shutdown
TS
1 V
*
V
(LTF)
280 kΩ
Power Source Selection
MODE
CE
AC Charge Enable
BAT Charge Enable
500 mA/ 100 mA
V
O(BAT−REG)
Charge
Control
Timer
and
Display
Logic
Fast Precharge
Recharge
Precharge
V
BAT
*
1C − 500 mA
C/S − 100 mA
ISET2
V
BAT
*
PG
V
(SET)
V
GND
Term
I(ISET1)
*
STAT1
STAT2
Sleep
V
BAT
*
V
IN
VSS
*
Signal Deglitched
UDG−04084
8
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