BQ76920 Datasheet, PDF (1/63 Pages) Texas Instruments – 15-Series Cell Battery Monitor Family

Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
bq76920, bq76930, bq76940
SLUSBK2F – OCTOBER 2013 – REVISED NOVEMBER 2015
bq769x0 3-Series to 15-Series Cell Battery Monitor Family
for Li-Ion and Phosphate Applications
1 Introduction
1
1.1 Features
• AFE Monitoring Features
– Pure digital interface
– Internal ADC measures cell voltage, die
temperature, and external thermistor
– A separate, internal ADC measures pack
current (coulomb counter)
– Directly supports up to three thermistors
(103AT)
• Hardware Protection Features
– Overcurrent in discharge (OCD)
– Short circuit in discharge (SCD)
– Overvoltage (OV)
– Undervoltage (UV)
– Secondary protector fault detection
• Additional Features
– Integrated cell balancing FETs
– Charge, discharge low-side NCH FET drivers
– Alert interrupt to host microcontroller
– 2.5-V or 3.3-V output voltage regulator
– No EEPROM programming necessary
– High supply voltage abs max (up to 108 V)
– Simple I²C™ compatible interface (CRC option)
– Random cell connection tolerant
1.2 Applications
• Light Electric Vehicles (LEV): eBikes, eScooters,
Pedelec, and Pedal-Assist Bicycles
• Power and Gardening Tools
• Battery Backup and UPS Systems
• Wireless Base Station Backup Systems
• 12-V, 18-V, 24-V, 36-V, and 48-V Battery Packs
1.3 Description
The bq769x0 family of robust analog front-end (AFE) devices serves as part of a complete
pack monitoring and protection solution for next-generation, high-power systems, such as light electric
vehicles, power tools, and uninterruptible power supplies. The bq769x0 is designed with low power in
mind: Sub-blocks within the IC may be enabled/disabled to control the overall chip current consumption,
and a SHIP mode provides a simple way to put the pack into an ultra-low power state.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
bq76920
TSSOP (20)
bq76930
TSSOP (30)
bq76940
TSSOP (44)
(1) For all available packages, see the orderable addendum at the end of the data sheet.
1.4 Simplified System Diagram
BODY SIZE (NOM)
6.50 mm × 4.40 mm
7.80 mm × 4.40 mm
11.00 mm × 4.40 mm
Rc
Cc
Rc
Cc
Rc
Cc
Rc
Cc
Rc
Cc
Cc
Rc
VC 5
VC 4
VC 3
VC 2
VC 1
VC 0
SRP
SRN
ALERT
BAT
REGSRC
REGOUT
CAP1
TS1
SCL
SDA
VSS
CHG
DSG
0.1 µF 0.1 µF 0.1 µF
PACK +
Rf
10 kΩ
10k
1 µF 1 µF Cf
4.7 µF
PUSH-BUTTON FOR BOOT
1M
VCC
SCL
SDA
Companion
Controller
GPIO
VSS
100
100
1M
1M
Rsns
PACK–
1
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. UNLESS OTHERWISE NOTED, this document contains
PRODUCTION DATA.