BQ769142 3-Series to 14-Series High Accuracy Battery Monitor and Protector for Li-
Ion, Li-Polymer, and LiFePO
4
Battery Packs
1 Features
• Battery monitoring capability for 3-series to 14-
series cells
• Integrated charge pump for high-side NFET
protection with optional autonomous recovery
• Extensive protection suite including voltage,
temperature, current, and internal diagnostics
• Two independent ADCs
– Support for simultaneous current and voltage
sampling
– High-accuracy coulomb counter with input
offset error < 1 µV (typical)
– High accuracy cell voltage measurement < 10
mV (typical)
• Wide-range current applications (±200-mV
measurement range across sense resistor)
• Integrated secondary chemical fuse drive
protection
• Autonomous or host-controlled cell balancing
• Multiple power modes (typical battery pack
operating range conditions)
– NORMAL mode: 286 µA
– Multiple SLEEP mode options: 24 µA to 41 µA
– Multiple DEEPSLEEP mode options: 9 µA to 10
µA
– SHUTDOWN mode: 1 µA
• High-voltage tolerance of 85 V on cell connect and
select additional pins
• Tolerant of random cell attach sequence on
production line
• Support for temperature sensing using internal
sensor and up to nine external thermistors
• Integrated one-time-programmable (OTP) memory
programmable by customers on production line
• Communication options include 400-kHz I
2
C, SPI,
and HDQ one-wire interface
• Dual-programmable LDOs for external system
usage
• 48-pin TQFP package (PFB)
2 Applications
•
•
•
Cordless power tools and garden tools
•
•
Other industrial battery pack (≥10S)
3 Description
The Texas Instruments BQ769142 device is a highly
integrated, high-accuracy battery monitor and
protector for 3-series to 14-series Li-ion, Li-polymer,
and LiFePO
4
battery packs. The device includes a
high-accuracy
monitoring
system,
a
highly
configurable protection subsystem, and support for
autonomous or host controlled cell balancing.
Integration includes high-side charge-pump NFET
drivers, dual programmable LDOs for external system
use, and a host communication peripheral supporting
400-kHz I
2
C, SPI, and HDQ one-wire standards. The
BQ769142 device is available in a 48-pin TQFP
package.
Device Information
PART NUMBER
PACKAGE
BODY SIZE (NOM)
BQ769142xx
PFB (48-pin)
7 mm × 7 mm
(1)
for information on the
device family. For all available devices, see the orderable
addendum at the end of the data sheet.
PACK-
VDD
3.3V
COMM
COMM TO
SYSTEM
5V
VC7
VC6
VC5
VC4
VC10
VC9
VC8
VC11
VC12B
VC12A
VC13B
VC13A
BREG
PCHG
PDSG
P
ACK
FUSE
VC14
CHG
DSG
BA
T
CP1
LD
NC
REG18
TS1
TS2
NC
TS3
VC3
VC0
SRP
VC2
VC1
SRN
VSS
SDA
REG1
RST_SHUT
DDSG
DCHG
DFETOFF
SCL
REG2
CFETOFF
HDQ
REGIN
ALERT
PACK+
GND
MCU
CAN
TRANSCEIVER
CHG
DSG
+
+
+
+
+
+
+
+
+
+
+
+
+
+
Simplified Schematic
SLUSE91A – SEPTEMBER 2020 – REVISED FEBRUARY 2021
Copyright © 2021 Texas Instruments Incorporated
1
Product Folder Links:
SLUSE91A – SEPTEMBER 2020 – REVISED FEBRUARY 2021
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
Summary of Contents for BQ769142
Page 79: ......
