Hardware Connection; Bq27742 Circuit Module Connection To Cell And System Load/Charger - Texas Instruments bq27742EVM User Manual

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6

Hardware Connection

Use of the bq27742EVM-001 requires three hardware components:
• bq27742 circuit module
• EV2300 or EV2400 PC interface board
• Windows PC
.
6.1 Connecting the bq27742 Circuit Module to a Battery Cell
Figure 6 shows how to connect the bq27742 circuit module to the cell and system load/charger.
J4
J1
CELL+
TP2
Power
Supply
3.6V
TB1
CELL-
TP1
Figure 6. bq27742 Circuit Module Connection to Cell and System Load/Charger
6.2 PC Interface Connection
The bq27742 fuel gauge can be configured as an HDQ communication device or left in default as an I
device. Once the bq27742 fuel gauge is configured for HDQ communication, it cannot be reverted to I
mode. See Section 10
SLUUAX8 – March 2014
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R18
J9
HDQ PULLUP
INT. 1.8V Pull up
R8
R10
R4
D2
R7
J7
J10
TP6 TP11
BAT
C4
REG25
C2
VPWR
TP8
C1
TS
C7
RA0
TP5
TP3
DSG
C5
R3
TP7
R2
CHG
RT1
BYPASS
RT2
bq27742 EVM
for information on configuring the bq27742 fuel gauge to HDQ mode.
bq27742EVM Single-Cell Impedance Track™ Technology Evaluation Module
Copyright © 2014, Texas Instruments Incorporated
USB
J8
J2 J3
AUX
TEMP
R9
R6
J15
J14
Q2
Q4
Q3
J12
J13
J11
HDQ
Q1
THERM
J6
TP10
PACK-/
FET
LOAD-
J5
PACK-/
Hardware Connection
EV2300
TP9
TB2
Load
Charger
2
C
2
C
9