Table of Contents
Advertisement
www.ti.com
4.7 F
CVDD
N
CVSS
N
1 F
N
DVDD
N
DVSS
1 F
REFHP
N
REFHM
N
1 F
N
AVDD
0.1 F
NEG5V
N
0.1 F
AVSS
N
LDOIN
NPNB
200
100
30
BAT
10 nF
100
N
VC16
0.47 uF
100
+
CELL 16
VC15
0.47 uF
+
CELL 15
100
VC1
0.47 uF
100
VC0
+
0.47 uF
CELL 1
10
CELL 16
CB16
0.47 uF
10
CELL 15
CB15
10
CB1
CELL 1
0.47 uF
10
CB0
CELL 1-
New recommendation to add 470 nF/16 V from CB16 to BAT for hotplug robustness not shown in
figure, see data sheet for details.
2.2 Design Summary
•
Decouple bypass capacitors on AVDD, CVDD, DVDD, and REFHP pins to the ground plane. (Refer to layout
guidelines for details.)
•
Bypass the NEG5V pin to AVSS with a 0.1-µF/10-V capacitor.
•
Put all capacitors as close to pins as possible.
SLVAE87A – DECEMBER 2020 – REVISED OCTOBER 2023
Submit Document Feedback
To COML of the
North Device
Isolation
Circuit
COMHP
COMHN
1
10 k
TSREF
GPIO1
10 k
GPIO2
GPIO3
GPIO4
GPIO5
GPIO6
GPIO7
GPIO8
If communication device is used on the system side
RX
To CVDD
TX
NFAULT
AVSS
1
HV to LV
Isolation
(Transformer)
COMLN
COMHP
COMHN
COMLP
Communication Device
To COMH of the
Top of Stack
COMLN
COMLP
Isolation
circuit
OPTIONAL: Only necessary for ring
architecture applications
BBP
BBN
Figure 2-1. Regulator Connection for Base Device
Copyright © 2023 Texas Instruments Incorporated
AVDD, CVDD outputs and DVDD, NEG5, REFHP and REFHM
1
1
PMIC
RX
VCC
BAT
TX
RS
TX
NFAULT
TX
RX
optional
NFAULT
MCU
BQ79600
(Base Device)
Note
BQ7961x-Q1 Design Recommendations for High Voltage Automotive BMS
If NO (system side) communication device is in use
To CVDD
VCC1
100 k
100 k
OUTA
INA
OUTB
OPTIONAL
INB
OUTC
optional
INC
GND2
GND1
SYS
ISO774x
1
VCC
TX
RX
INT
GND
MCU
5
Advertisement
Table of Contents
