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BQ27742YZFR-G1

Single cell Li-ion battery fuel gauge with integrated protection | battery gas gauge

Manufacturer:

Texas Instruments, Inc
Mfr.Part #:

BQ27742YZFR-G1
Datasheet:

BQ27742YZFR-G1 Datasheet (PDF)
Function:

Multi-Function Controller
Battery Chemistry:

Lithium Ion
Number of Cells:

1
Fault Protection:

Over Current, Over/Under Voltage, Short Circuit
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BQ27742YZFR-G1 General Description

The Texas Instruments bq27742-G1 is a fuel gauge for single-cell Li-Ion battery packs that uses patented Impedance Track™ technology to deliver rate-, temperature-, and aging-compensated predictions of remaining battery capacity and system runtime with highest accuracy. The device also includes a fully integrated high-side protector that eliminates the need for a separate Li-Ion protection circuit and provides a full suite of high-accuracy fault detections for overvoltage, undervoltage, overcurrent in charge, overcurrent in discharge, and short-circuit in discharge conditions. The hardware protection functions offer built-in data flash-based programmability, allowing simple reconfiguration of existing devices for varying end equipment needs.

The fuel gauge provides information such as remaining battery capacity (mAh), state-of-charge (%), runtime to empty (minutes), voltage (mV), current (mA), and temperature (°C), as well as recording vital parameters throughout the lifetime of the battery. The device also supports interrupts to the host to indicate detection of a variety of important battery conditions to the system.

The DSBGA is a 15-ball package (2.78 mm × 1.96 mm) that is ideal for space-constrained applications.

Key Features

Battery Fuel Gauge and Protector for Single-Cell Li-Ion Applications
Microcontroller Peripheral Provides:
- Precision 16-Bit, High-Side Coulomb Counter with Low-Value Sense Resistor
  (5 mΩ to 20 mΩ)
- External and Internal Temperature Sensors for Battery Temperature Reporting
- Lifetime and Current Data Logging
- 64 Bytes of Non-Volatile Scratch Pad Flash
- SHA-1 Authentication Capability
Battery Fuel Gauging Based on Patented Impedance Track™ Technology
- Models Battery Discharge Curve for Accurate Time-To-Empty Predictions
- Automatically Adjusts for Aging, Self-Discharge, and Temperature- and Rate-Induced Effects on Battery
Integrated High-side NMOS Protection FET Drive
Hardware-based Safety and Protection:
- Overvoltage (OVP)
- Undervoltage (UVP)
- Overcurrent in Charge (OCC)
- Overcurrent in Discharge (OCD)
- Short-Circuit in Discharge (SCD)
I²C and HDQ Interface Formats for Communication with Host System
Ultra-Compact, 15-Ball NanoFree™ DSBGA

Specifications

Category	Integrated Circuits (ICs)Power Management (PMIC)Battery Management	Series	-
Function	Multi-Function Controller	Battery Chemistry	Lithium Ion
Number of Cells	1	Fault Protection	Over Current, Over/Under Voltage, Short Circuit
Interface	HDQ, I²C	Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount	Base Product Number	BQ27742