BQ2406X Datasheet, PDF (6/31 Pages) Texas Instruments – 1A SINGLE-CHIP Li-Ion/Li-Pol CHARGE MANAGEMENT IC WITH THERMAL REGULATION

bq2406x
SLUS689 – JUNE 2006
PIN ASSIGNMENT
VSS STAT 2 STAT 1 TMR
IN
5
4
3
2
1
DEVICE INFORMATION
VSS STAT 2 STAT 1 TMR
IN
5
4
3
2
1
VSS STAT 2 STAT 1 TMR
IN
5
4
3
2
1
www.ti.com
VSS STAT 2 STAT 1 TMR
IN
5
4
3
2
1
bq24060/64/65 DRC
(TOP VIEW)
bq24061/66 DRC
(TOP VIEW)
bq24062 DRC
(TOP VIEW)
bq24063 DRC
(TOP VIEW)
6
7
ISET PG
8
9
10
TS BAT OUT
6
7
ISET PG
8
9
10
CE BAT OUT
6
7
ISET CE
8
9
10
TS BAT OUT
6
7
ISET CE
8
9
10
TE BAT OUT
TERMINAL FUNCTIONS, REQUIRED COMPONENTS
NAME
IN
TERMINAL NO.
bq24060/64/65 bq24061/66
1
1
TMR
2
2
STAT1
3
3
STAT2
4
4
VSS
5
5
ISET
6
6
PG
7
7
CE
—
8
TE
—
—
TS
8
—
BAT
9
9
OUT
10
10
Exposed
Thermal
Pad
Pad
Pad
I/O
bq24062 bq24063
DESCRIPTION AND REQUIRED COMPONENTS
1
1
I
Charge Input Voltage and internal supply. Connect a 1- µF
(minimum) capacitor from IN to VSS.
2
2
I
Safety Timer Program Input, timer disabled if floating. Connect
a resistor to VSS pin to program safety timer timeout value
3
3
O Charge Status Output 1 (open-collector, seeTable 3)
4
4
O Charge Status Output 2 (open-collector, see Table 3)
5
5
I Ground
Charge current set point, resistor connected from ISET to VSS
6
6
O sets charge current value. Connect a 0.47-µF capaciator from
BAT to ISET.
—
—
O Power Good status output (open-collector), active low
7
7
I
Charge enable Input. CE = LO enables charger. CE = HI
disables charger.
Termination enable Input. TE = LO enables termination
—
8
I detection and battery absent detection. TE = HI disables
termination detection and battery absent detection.
Temperature Sense Input, connect to battery pack thermistor.
8
—
I Connect an external resistive divider to program temperature
thresholds.
9
9
I
Battery Voltage Sense Input. Connect to the battery positive
terminal. Connect a 200-Ω resistor from BAT to OUT.
10
10
O
Charge current output. Connect to the battery positive terminal.
Connect a 1- µF (minimum) capacitor from OUT to VSS.
Pad
Pad
There is an internal electrical connection between the exposed
thermal pad and Vss pin of the IC. The exposed thermal pad
must be connected to the same potential as the Vss pin on the
printed circuit board. Do not use the thermal pad as the primary
ground input for the IC. Vss pin must be connected to ground
at all times.
FUNCTIONAL DESCRIPTION
The charge current is programmable using external components (R_ISET resistor). The charge process starts
when an external input power is connected to the system, the charger is enabled by CE = LO and the battery
voltage is below the recharge threshold, V(BAT) < V_(RCH). When the charge cycle starts a safety timer is
activated, if the safety timer function is enabled. The safety timer timeout value is set by an external resistor
connected to TMR pin.
6
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