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• Set Write On Change to ON if not already set.
• 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. For the bq24160 EVM, enable PS #2 and adjust PS #2 so that the voltage measured by VM #2, across
BAT and GND, measures 3.2 V ± 50 mV. For the bq24161/163/168 EVMs, enable PS #2 and adjust
PS #2 so that the voltage measured by VM #2, across BAT and GND, measures 2.5 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. Ensure that the Section 2.3 steps are followed.
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. For the bq24160 EVM, enable PS #2 and adjust PS #2 so that the voltage measured by VM #2, across
BAT and GND, measures 3.2 V ± 50 mV. For the bq24161/163/168 EVMs, enable PS #2 and adjust
PS #2 so that the voltage measured by VM #2, across BAT and GND, measures 2.5 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.
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WCSP-Packaged bq24160/161/163/168 Evaluation Modules SLUU496A – December 2011– Revised January 2012
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