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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.
bq76920, bq76930, bq76940
SLUSBK2G –OCTOBER 2013–REVISED MAY 2016
bq769x0 3-Series to 15-Series Cell Battery Monitor Family
for Li-Ion and Phosphate Applications
1 Introduction
1.1 Features
1
1
• 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 Absolute Maximum (Up to
108 V)
– Simple I
2
C™ 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 packmonitoring
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 BODY SIZE (NOM)
bq76920 TSSOP (20) 6.50 mm × 4.40 mm
bq76930 TSSOP (30) 7.80 mm × 4.40 mm
bq76940 TSSOP (44) 11.00 mm × 4.40 mm
(1) For all available packages, see the orderable addendum at the end of the data sheet.
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