Texas Instruments bq24720 EVM, User Manual, Page: 6 / 34

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V
POS
J1
GND
VSYS
J8
GND
VBAT
IOUT
GND
REF
J3
J2
J11 J10 J9
J7
Power
supply #2
ACGD
J4
GND
ALARM
CHGEN
SDA
SCL
POS
J6
J5
D8 D10 D11 D7 D9
D18
J12
APPLICATION CIRCUIT
V
USB
V
EV2300
Iin
I
Power
supply #1
BQ24720 EVM
Oscilloscope
L1
PH
V
POS
J1
GND
VSYS
J8
GND
VBAT
IOUT
GND
REF
J3
J2
J11 J10 J9
J7 J7 J7
Power
supply #2
ACGD
J4
GND
ALARM
CHGEN
SDA
SCL
POS
J6 J6 J6
J5
D8 D10 D11 D7 D9
D18
J12
APPLICATION CIRCUIT
V
USB
V
EV2300
Iin
I
Power
supply #1
BQ24720 EVM
Oscilloscope
L1
PH
Test Summary
16. (For bq24721 only) Set the power supply number 3 for 2.5 V
±
100 mVDC, 1 A
±
0.1 A current limit
and then turn off the supply.
17. (For bq24721 only) Connect the output of the power supply number 3 to J8 (ACGD, GND).
After the steps above, the test setup for bq24720 EVM is shown in Figure 2 . The test setup for bq24721
EVM is shown in Figure 3 .
Figure 2. Original Test Setup for bq24720 EVM
6 bq24720/21 EVM (HPA104) for Multi-Cell Synchronous SLUU237 – January 2006
Switch-Mode Charger With System Power Selector and SMBus SBS-Like Interface