BQ2406X Datasheet, PDF (9/31 Pages) Texas Instruments – 1A SINGLE-CHIP Li-Ion/Li-Pol CHARGE MANAGEMENT IC WITH THERMAL REGULATION

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FUNCTIONAL BLOCK DIAGRAM
bq2406x
SLUS689 – JUNE 2006
V(IN)
IN
V(OUT)
V _{PRE_CHARGE}
O(REG)
V(ISET)
BACKGATE BIAS
I(OUT)
IOUT) / K_(SET)
I(DETECT)
I(FAULT )
OUT
ISET
V_(SET)
V_(PRECHG)
T_J
T _J(REG)
V(IN)
V_{(SET) ,} V_(PRECHG)
TMR
VCC
TS
V(IN)
+
V_TMR(OFF)
-
+
-
+
-
BAT
+
V(OVP)
-
+
V (RCH)
-
+
V(LOW)
-
V _(TAPER)
+
V(ISET)
-
Thermal
Shutdown
TDGL(OVP)
Deglitch
TDGL( RCH)
Deglitch
TDGL( TERM)
Deglitch
CHG ENABLE
BATTERY ABSENT DETECTION
AND SHORT RECOVERY
V(IN)
Dynamically
Controlled
Oscillator
T_{DGL( CHOVC)}
Deglitch
+
- _VOC
Over_current
TDGL( INDT)
+
Deglitch
-
Input Power
Detected
V(IN)
V(OUT)+VIN(DT )
Timer
Fault
Timer
Disable
Suspend
Input Over-Voltage
VCC
POR
REFERENCE
AND
BIAS
Internal
Voltage
References
Recharge
Precharge
CHARGE
CONTROL,
TIMER and
DISPLAY LOGIC
Terminate
CE
PG
STAT1
VSS
STAT 2
APPLICATION CIRCUITS
The typical application diagrams shown here are configured for 750 mA fast charge current, 75 mA pre-charge
current, 5 hour safety timer and 30 min pre-charge timer.
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