Texas Instruments BQ76907-Q1 Manual

BQ76907-Q1 2-Series to 7-Series High Accuracy Automotive Battery Monitor and
Protector for Li-Ion, Li-Polymer, LiFePO
1 Features
• Battery and supercap monitoring capability for 2-
series to 7-series cells
• Integrated low-side drivers for NFET protection
with optional autonomous recovery
• Extensive protection suite including voltage,
temperature, current, and internal diagnostics
• 16-bit delta-sigma voltage ADC
– High accuracy cell voltage measurement of
1mV (typical)
• Dedicated 16- or 24-bit delta-sigma coulomb
counter ADC
• – High-accuracy current measurement with low
input offset error
– Wide-range current applications (±200mV
measurement range across sense resistor)
– 48bit accumulated charge integrator with timer
• Host-controlled cell balancing
• Multiple power modes (typical battery pack
operating range conditions)
– NORMAL mode (with Coulomb counting): 32μA
to 175μA
– SLEEP mode (with protections active): 6μA
– DEEPSLEEP mode: 2.7μA
– SHUTDOWN mode: <1μA
• Supply voltage from 3V to 38.5V
• High-voltage tolerance of 45V on cell connect and
select additional pins
• Support for temperature sensing using an internal
sensor and an external thermistor
• Integrated one-time-programmable (OTP) memory
for device settings, programmed by TI
2
• 400kHz I C serial communications with optional
CRC support
• Programmable LDO for external system usage
• 20-pin QFN (RGR) package
2 Applications
• Door handle supercap module
• Automotive 12V auxiliary battery
• Automotive backup battery
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. ADVANCE INFORMATION for preproduction products; subject to change
without notice.
(LFP), and LTO Battery Packs and
4
Supercaps
3 Description
The Texas Instruments BQ76907-Q1 provides a
highly integrated, high-accuracy battery monitor
and protector for 2-series to 7-series Li-ion, Li-
polymer, LiFePO
and supercaps. The device includes a high-accuracy
monitoring system with a dedicated coulomb counter
and accumulated charge integration, a highly
configurable protection subsystem, and support for
host-controlled cell balancing. Integration includes
low-side protection NFET drivers, a programmable
LDO for external system use, and an I
communication interface supporting up to 400kHz
operation with optional CRC. Continuous Coulomb
counting is available in multiple power modes ranging
down to 32μA. The BQ76907-Q1 operates over a
supply voltage from 3V to 38.5V and is available in
a 20-pin QFN package.
PART NUMBER
BQ76907-Q1
(1) For more information, seeMechanical, Packaging, and
Orderable information at the end of the datasheet.
+
+
+
VC4
+
VC3
+
VC2
+
VC1
+
VC0
Simplified Schematic
SLUSFM5 – JANUARY 2024
(LFP), and LTO battery packs
4
2
C host
Device Information
(1)
PACKAGE PACKAGE SIZE (NOM)
3.5mm × 3.5mm × 0.9mm,
RGR (20-pin)
0.5mm pitch
VDD
REGOUT
ALERT INTP
SDA
SDA
SCL
SCL
VSS
TS
BQ76907-Q1
PACK+
MCU
GND
PACK–