Datasheet

Ibat
V
Isys
V
I
Load
#1
Load
#2
I
DCIN
J1
GND
J2
GND
BAT
IOUT
J3
SYS
J4
GND
ACOK
3.3V
SDA SCL
APPLICATION CIRCUIT
HPA710
bq247xxEVM
TP1
U1
Power
supply #2
USB
V
EV2300
I
in
I
Power
supply #1
www.ti.com Test Summary
c) Disconnect any other unsure SMBus connection. Plug USB cable back to the original
EVM2300 installation USB port.
d) Open the bq24725A/735 evaluation software. The main window of the software is shown in
Figure 3.
3. In the software main window, click all the Read buttons.
a) Type in 512 (mA) in the Charge Current DAC, and click Write. This sets the battery charge
current regulation threshold.
b) Type in 12592 (mV) in the Charge Voltage DAC, and click Write. This sets the battery voltage
regulation threshold.
c) Measure → V(J2(BAT)) = 12.6 V ± 200 mV
2.4.3 Charge Current and ac Current Regulation, DPM
1. Type in 7801 in the Charge Option, and click Write; this disable
charging.
2. Connect the Load #2 in series with a current meter (multimeter) to J2 (BAT, GND).
Ensure that a voltage meter is connected across J2 (BAT, GND). Turn on the Load #2. Use the
constant voltage mode. Set the output voltage to 10.5 V.
3. Connect the output of the Load #1 in series with a current meter (multimeter) to J2 (SYS, GND).
Ensure that a voltage meter is connected across J2 (SYS, GND). Turn on the power of the Load
#1. Set the load current to 3 A ± 50 mA but disable the output. The setup is now like Figure 4 for
HPA710. Ensure that Ibat = 0 A ± 10 mA and Isys = 0 A ± 10 mA.
Figure 4. Test Setup for HPA710
4. Type in 7800 in the Charge Option, and click Write, this enable charging.
Measure → Ibat = 500 mA ± 100 mA
7
SLUU507A–June 2011–Revised September 2011 bq24735/725A Battery Charger Evaluation Module
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