Texas Instruments BQ2463X EVM, BQ2461X manual Procedure, AC Adapter Detection Threshold

Test Summary www.ti.com

2.4Procedure

2.4.1AC Adapter Detection Threshold

1.Make sure EQUIPMENT SETUP steps are followed. Turn on PS#2.

2.Turn on PS#1

Measure → V(J5(SYS)) = 0 ± 500mV Measure → V(TP(VREF)) = 0V ± 1000mV Measure → V(TP(REGN)) = 0V ± 500mV

3.Increase the output voltage on PS#1 until D5 (PG) on but do not exceed 5V. Set the power supply #2 to 1.8V ± 100mVDC

Measure → V(J1(VIN)) = 4.5V ± 0.5V Measure → V(J5(SYS)) = 4.5V ± 0.5V Measure → V(TP(VREF)) = 3.3V ± 200mV Measure → V(TP(REGN)) = 0V ± 500mV Measure → D4 (/ACDRV) on, D5 (PG) on

2.4.2Charger Regulation Voltage

1.Increase the voltage of PS#1 until V(J1(VIN)) = 24V ± 0.1V. Measure → V(J5(BAT, GND)) = 0V ± 1V

2.Put JP5 on (Enable the charging). Observe → D3 (CE) on.

Measure → Peak V(J5(BAT)) = 21.0V ± 1V (bq2461x) Peak V(J5(BAT)) = 18.0V ± 1V (bq2463x)

Measure → V(TP(REGN)) = 6V ± 500mV

2.4.3Charge Current and AC Current Regultion (DPM)

1.Take off JP5 (Disable the charging).

2.Connect the Load #2 in series with a current meter (multimeter) to J5 (BAT, GND). Make sure a voltage meter is connected across J5 (BAT, GND). Turn on the Load #2. Set the output voltage to 12V (bq2461x) or 2V (bq2463x).

3.Connect the output of the Load #1 in series with a current meter (multimeter) to J5 (SYS, GND). Make sure a voltage meter is connected across J5 (SYS, GND). Turn on the power of the Load #1. Set the load current to 3.0A ± 50mA but disable the load #1. The setup is now like Figure 1 for HPA422. Make sure Ibat = 0A ± 10mA and Isys = 0A ± 10mA.

4.Put JP5 on (Enable the charging). Observe → D3 (CE) on

Measure → Ibat = 300mA ± 200mA (bq2461x) Ibat = 125mA ± 60mA (bq2463x)

Observe → D7 (STAT1) on; D8 (STAT2) off.

5.Set the Load #2 output voltage to 16.5V. Measure → Ibat = 3000mA ± 300mA Observe → D7 (STAT1) on; D8 (STAT2) off.

6.Enable the output of the Load #1

Measure → Isys = 3000mA ± 200mA, Ibat = 1400mA ± 500mA, Iin = 4000mA ± 500mA

7.Turn off the Load #1.

Measure → Isys = 0 ± 100mA, Ibat = 3000mA ± 300mA.

8.Increase the Load #2 output voltage from 16.5V to 22V (61x) or 19V (63x). Measure → Isys = 0 ± 100mA, Ibat = 0mA ± 100mA.

Observe → D7 (STAT1) off; D8 (STAT2) on.

9.Decrease the Load #2 output voltage back to 16.5V. Observe → D7 (STAT1) on; D8 (STAT2) off.

6 bq2461x/bq2463x EVM (HPA422) Multi-Cell Synchronous Switch-Mode Charger SLUU396A –January 2010 –Revised July 2010

Copyright © 2010, Texas Instruments Incorporated