Datasheet

Test Summary

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Figure 5. Main Window of bq2427x EVM Evaluation Software

2.4 Recommended Test Procedure

The following test procedure is useful in evaluating the charger IC outside of a real system, especially

when no battery is available to connect to the output (i.e., Load #1).

2.4.1 System Voltage and Default Charge Settings

1. Ensure that the Section 2.3 steps are followed.

2. Connect the output of PS #1 in series with CM #1 to J2 (USB, GND).

3. Connect voltage meter 1 (VM #1) across J1 or TP2 and J3 (USB, GND).

4. With PS #2 disabled, turn on PS #1.

5. Ensure the electronic load is on current mode and set the current to 1 A or turn down the resistor

decade box until CM #3 measures 1000 ±100 mA.

QFN-Packaged bq24270/271 Evaluation Modules SLUU924–April 2012

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