Datasheet

Test Summary

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Figure 3. Main Window of bq24725A/735 Evaluation Software

2.4 Procedure

2.4.1 AC Adapter Detection Threshold

1. Ensure that Section 2.3 steps are followed. Turn on PS#2.

Note: Load #1 and Load #2 are not connected during this step.

2. Turn on PS#1.

3. Increase the output voltage of PS#1 to 19.5 V.

Measure → V(TP(ACDET)) = 2.6 V ± 0.1 V

Measure → V(TP(ACOK)) = 3.3 V ± 0.1 V

Measure → V(J2(SYS)) = 19.5 V ± 0.5 V

Measure → V(TP(REGN)) = 6 V ± 0.5 V

Measure → V(TP(ACDRV, CMSRC)) = 6 V ± 0.5 V

Measure → V(J2(BAT, GND)) = 2 V ± 2 V

2.4.2 Charger Parameters Setting

1. In the software main window, click all the Read buttons. Ensure that no error information is

generated.

2. If the error information window pops up and you see USB Error. Insure USB cable is connected

and Driver is working., do the following steps.

a) Click OK. Then, close main window, as shown in Figure 3, and disconnect USB cable.

b) Check 3.3-V power supply (PS#2) and power supply #1 (PS#1) voltage on the EVM board.

bq24735/725A Battery Charger Evaluation Module SLUU507A–June 2011–Revised September 2011

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