Texas Instruments 2.5A, Dual-Input, Single Cell Switchmode Li-Ion Battery Charger with Power Path Evaluation Module BQ24 BQ24160EVM-742 Hoja De Datos
Los códigos de productos
BQ24160EVM-742
Test Summary
•
Set Reset Watchdog Timer to update every 5 seconds.
•
Set Supply Precedence to IN if not already set.
•
Uncheck Disable Charging if checked.
•
Check Enable STAT/INT Outputs.
•
Set Battery Regulation Voltage to 4.20 V.
•
Set IN Input Current Limit to 2.5 A.
•
Set Charge Current to 1000 mA.
•
Click the READ button at the top of the window and confirm that the previous settings remain.
8. Enable PS #2 and adjust PS #2 so that the voltage measured by VM #2, across BAT and GND,
measures 3.3 V ± 50 mV.
9. Adjust the power supply so that VM #1 still reads 6 V ± 100 mV, if necessary, then
Measure on CM#2
→
I
CHRG
= 1000 mA ± 100 mA
Measure on CM#1
→
I
IN
= 700 mA ± 70 mA
10. Turn off PS #1 and PS #2.
2.4.2
Charge Voltage and Current Regulation of USB
1. Be sure to follow
steps .
2. Connect the output of Power Supply #1 (PS #1) in series with current meter (multimeter) #1 (CM #1) to
J8 and J11 or J9 (USB, GND).
3. Connect a voltage meter 1 (VM #1) across J8 or TP4 and J11 or TP8 (USB, GND).
4. Move JP5 to HI.
5. Turn on PS #1 and PS #2 if used.
6. Return JP5 to LO.
7. Software setup:
•
Press the READ button to obtain the current settings.
•
Set Write On Change to ON if not already set.
•
Set Reset Watchdog Timer to update every 5 seconds.
•
Set Supply Precedence to USB if not already set.
•
Uncheck Disable Charging if checked.
•
Check Enable STAT/INT Outputs.
•
Set Battery Regulation Voltage to 4.20 V.
•
Set USB Input Current Limit to 1500 mA.
•
Set Charge Current to 1000 mA.
•
Click the READ button at the top of the window, and confirm that the previous settings remain.
8. Enable PS #2 and adjust PS #2 so that the voltage measured by VM #2, across BAT and GND,
measures 3.3 V ± 50 mV.
9. Adjust the power supply so that VM #1 still reads 6 V ± 100 mV if necessary then
Measure on CM#2
→
I
CHRG
= 1000 mA ± 100 mA
Measure on CM#1
→
I
IN
= 700 mA ± 70 mA
10. Turn off PS #1 and PS #2.
2.4.3
Helpful hints
1. To observe the taper current as the battery voltage approaches the set regulation voltage, allow the
battery to charge or, if using BAT_Load (PR1010), slowly increase the PS #2 voltage powering
BAT_Load (PR1010). Use VM #2 across BAT and GND to measure the battery voltage seen by the IC.
BAT_Load (PR1010). Use VM #2 across BAT and GND to measure the battery voltage seen by the IC.
2. To observe the V
INDPM
function, lower the current limit on PS #1.
3. To observe battery supplement mode, apply a resistive load across SYS and GND that is higher than
11
SLUU668 – March 2012
QFN-Packaged bq24160/161/162A/63EVM Evaluation Modules
Copyright © 2012, Texas Instruments Incorporated