BQ25060_1 Datasheet, PDF (6/24 Pages) Texas Instruments – 1A, Single-Input, Single Cell Li-Ion Battery Charger with 50-mA LDO, and External Power Path Control

bq25060
SLUSA32 – MAY 2010
PIN CONFIGURATION
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IN ₁
ISET ²
VSS ₃
LDO 4
TS 5
bq 25060
10 OUT
9 _BGATE
8 CHG
7 EN
6 BAT
10-pin 2mm x 3mm SON
PIN
NAME
NO.
IN
1
ISET
2
VSS
3
LDO
4
TS
5
EN
7
CHG
8
BAT
6
BGATE
9
OUT
10
Thermal Pad
PAD
PIN FUNCTIONS
I/O
DESCRIPTION
I Input power supply. IN is connected to the external DC supply (AC adapter or USB port). Bypass IN to VSS with
at least a 0.1µF ceramic capacitor.
I Current programming input. Connect a resistor from ISET to VSS to program the input current limit when the user
proagammable mode is selected by the EN pin. The resistor range is between 1kΩ and 10kΩ to set the current
between 100 mA and 1A.
– Ground terminal. Connect to the thermal pad and the ground plane of the circuit.
O LDO output. LDO is regulated to 4.9V and drives up to 50mA. Bypass LDO to VSS with a 0.1µF ceramic
capacitor. LDO is enabled when V_UVLO < V_IN < V_OVP.
I Battery pack NTC monitoring input. Connect the battery pack NTC from TS to VSS to monitor battery pack
temperature. The default pack temperature range is 0°C to 45°C thresholds.
I Enable input. Drive EN high to disable the IC. Connect EN to VSS to place the bq25060 in the user pgrammable
mode where the input current is programmed using the ISET input. Leave EN flaoting to place the bq25060 in
USB500 mode. See the Charger Enable section for details on using the EN interface.
O Charge status indicator open-drain output. CHG is pulled low while the device is charging the battery. CHG goes
high impedance when the battery is fully charged and does not indicate subsequent recharge cycles.
O Battery connection output. BAT is the sense input for the battery as well as the precharge current output. Connect
BAT to the battery and bypass BAT to VSS with a 0.1µF ceramic capacitor.
I/O Battery P-Channel FET gate drive output. Connect BGATE to the gate of the external P-Channel FET that
connects the battery to OUT. Connect BGATE to VSS if the external FET is not used. No external capacitor is
recommended from BGATE to GND.
O System output connection. OUT supplies the system with a minimum voltage of 3.4V (min.) to ensure system
operation whenever an input adapter is connected regardless of the battery voltage. Bypass OUT to VSS with a
minimum 1µF ceramic capacitor.
– There is an internal electrical connection between the exposed thermal pad and the VSS pin of the device. The
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 device. VSS pin must be connected to ground at all times.
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