Texas Instruments BQ77307 Instruction Manual

BQ77307 2-Series to 7-Series High Accuracy Battery Primary or Secondary Protector
for Li-Ion, Li-Polymer, LiFePO

1 Features

• Primary or secondary voltage, current, and
temperature protection for 2-series to 7-series cells
with an autonomous recovery option
• Voltage protection:
– Cell overvoltage (COV): 0 V–5.5 V in 1-mV
steps, ±4-mV accuracy
– Cell undervoltage (CUV): 0 V–5.5 V in 1-mV
steps, ±4-mV accuracy
• Current protection:
– Short circuit in discharge (SCD): 10 mV–500
mV, varying steps
– Overcurrent in charge (OCC): 3 mV–123 mV,
2-mV steps
– Overcurrent in discharge 1 and 2 (OCD1 and
OCD2): 4 mV–200 mV, 2-mV steps
• Temperature protection using external NTC
thermistor:
– Overtemperature in charge and discharge
(OTC and OTD)
– Undertemperature in charge and discharge
(UTC and UTD)
– Internal die overtemperature
• Integrated low-side drivers for NFET protection
with an optional autonomous recovery
• Low power operation:
– NORMAL mode, both FETs enabled: 8 μA
– NORMAL mode, FETs disabled: 5 μA
– SHUTDOWN Mode: < 1 μA
• High voltage tolerance of 45 V on cell connect and
select additional pins
• Integrated one-time-programmable (OTP) memory
for device settings, programmed by TI
• Programmable interrupt for host processor, status
information available through I
2
• 400-kHz I C serial communications with optional
CRC support
• Programmable LDO for external system usage
• 20-pin QFN 3.5 mm × 3.5 mm × 0.9 mm (RGR)
package

2 Applications

• Cordless power tools and garden tools
• Vacuum cleaners
• Non-military drones
• Other industrial battery packs (2 series to 7 series)
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.
(LFP), and LTO Battery Packs
4

3 Description

The Texas Instruments BQ77307 family of products
features a highly integrated, high-accuracy primary
protector for 2-series to 7-series Li-ion, Li-polymer,
LiFePO
device includes a high-accuracy voltage, current, and
temperature protection subsystem with integrated low-
side protection NFET drivers and a programmable
LDO for external system use. The BQ77307 provides
an interrupt to a host processor and integrates an
2
I
400-kHz operation with optional CRC to read status
information and program settings. The BQ77307 is
available in a 20-pin QFN package.
(1)
2
C
(LFP), and LTO battery packs. Each
4
C host communication interface, supporting up to
Device Information
PART NUMBER PACKAGE
BQ77307 RGR (20 pins)
See the orderable addendum at the end of the data sheet.
+
+
+
VC4
+
VC3
+
VC2
+
VC1
+
VC0
TS
Simplified Schematic
BQ77307
SLUSF60 – DECEMBER 2023
PACKAGE SIZE
(1)
(NOM)
3.5 mm × 3.5 mm × 0.9
mm, 0.5-mm pitch
PACK+
External
REGOUT
Circuitry
ALERT
SDA
SCL
VSS
PACK–