Техническая Спецификация для Texas Instruments Evaluation Module for BQ25060 1A, Single-Input, Single Cell Li-Ion Battery Charger with 50mA LDO BQ250 BQ25060EVM

Модели

BQ25060EVM

www.ti.com

Procedure

4.1.5

Increase PS#2 until D1 turns off indicating charger termination, to ~4.5 Vdc to raise VBAT to
~4.22 V.

Observe

→

D1(/CHG) off – Once terminated, the adapter powers the system. If the BAT pin is
driven too high in voltage by P/S#2, the battery overvoltage protection kicks in and
turns off the input FET, and the battery powers the system. This condition does not
normally occur with a battery in place of the battery bias circuit.

Measure

→

Iin = 180 mA ±50 mA

Measure

→

V(J2(OUT)) = 4.2 V ±200 mV

4.1.6

Decrease PS#2 to ~4.1 Vdc to lower VBAT to 3.8 V ±50 mV.

Observe

→

D1(/CHG) on – this shows refresh of the cell once some of the charge is
removed.

For -001 Measure

→

Iin = 285 mA ±50 mA

For -002 Measure

→

Iin = 467 mA ±50 mA

Measure

→

V(J2(OUT)) = 3.8 V ±200 mV

4.2

Input Current Setting

4.2.1

For HPA577-001 (bq25050 EVM) only:

In the software interface window, select 7 on "Number of Pulses," and click on "Send Pulses" to
bq25050EVM.

Measure

→

Iin = 374 mA ±50 mA

4.2.2

For HPA577-002 (bq25060 EVM) only:

PUT JP1 between EN and LO; trim R6 and observe the input current change.

Set

→

Iin = 374 mA ±50 mA

4.3

Charger Cut-Off by Thermistor

4.3.1

For HPA577-001 (bq25050 EVM) only:

Slowly trim R7 until V(J3(TS)) = 0.675 V ± 50 mV.

Observe

→

D1 (/CHG) flashing. This indicates a temperature fault that was tripped by the cold
temperature threshold comparator.

Trim R7 CW until V(J3(TS)) = 0.5 V ±50 mV.

Observe

→

D1 (/CHG) on.

Trim R7 CW until V(J3(TS)) = 0.75 V ±50 V.

Observe

→

D1 (/CHG) flashing. This indicates a temperature fault which was tripped by the hot
temperature threshold comparator.

SLUU438 – July 2010

bq25050/bq25060EVM