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BQ27510DRZR-G2

System-side Impedance Track Li-Ion fuel gauge, 1-cell, I2C, 12-SON, direct battery conn

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Manufacturer Part：

BQ27510DRZR-G2

Package：

12-VFDFN/SON (2.5 x 4 x 0.95 mm)

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Description

Product Overview

The BQ27510DRZR-G2 from Texas Instruments is a system-side Impedance Track fuel gauge for single-cell Li-Ion batteries with direct battery connection. Housed in a 12-SON (2.5×4 mm) package, it uses TI’s patented Impedance Track algorithm to provide accurate state-of-charge (SOC), remaining capacity, and time-to-empty predictions via I2C.

Key Specifications

Function Battery Fuel Gauge / Monitor
Battery Chemistry Lithium-Ion (single cell)
Algorithm Impedance Track
Interface I2C (7-bit address: 0x55)
Supply Voltage 2.7V to 5.5V
Sense Resistor 5-20 mOhm typical
Memory 96 bytes non-volatile scratchpad Flash
Operating Temperature -40°C to +85°C
Package 12-VFDFN/SON (2.5 x 4 mm)

Features

  • Patented Impedance Track algorithm for less than 1% SOC error
  • Automatic adjustment for battery aging and temperature
  • Low-value sense resistor (10 mOhm or less) for minimal power loss
  • Battery low interrupt warning to host processor
  • Battery insertion indicator
  • 96 bytes of non-volatile scratchpad Flash memory

Applications

  • Smartphone and tablet battery management
  • Portable medical device fuel gauging
  • Industrial handheld instruments
  • Embedded system battery monitoring
  • E-reader and wearable fuel gauging

The Texas Instruments BQ27510DRZR-G2 is a system-side Impedance Track fuel gauge IC designed for accurate remaining capacity and state-of-charge measurement of single-cell lithium-ion batteries. It resides on the system main board and manages an embedded or removable battery pack through direct PACK+ and PACK- connections plus a thermistor input. The patented Impedance Track algorithm models the battery discharge curve and automatically adjusts for aging, self-discharge, temperature, and discharge rate inefficiencies, achieving less than 1% SOC prediction error. Communication with the host processor occurs via I2C at address 0x55, providing access to standard and extended command registers for real-time battery status, configuration, and data flash programming.

The BQ27510-G2 fuel gauge operates using the Impedance Track algorithm, which combines coulomb counting with impedance modeling for superior accuracy. It measures cell voltage, current through a low-value sense resistor (5-20 mOhm), and temperature to compute state-of-charge in real time. During relaxation periods, the device determines the cell’s open-circuit voltage (OCV) and compares it against a preloaded OCV-SOC lookup table to establish an accurate SOC reference point. During charge/discharge, coulomb counting tracks charge flow while the impedance model compensates for rate and temperature effects. The Ra table in data flash stores impedance profiles at different SOC levels, which are automatically updated during field operation. The device transitions between NORMAL, SLEEP, and HIBERNATE power modes based on activity to minimize power consumption.

Pin Name Description
1 SRP Current Sense Resistor Positive Input
2 SRN Current Sense Resistor Negative Input
3 BAT Battery Voltage Input (PACK+)
4 TS Thermistor Input (Semitec 103AT)
5 BAT_LOW Battery Low Interrupt Output
6 BAT_INSERT Battery Insert Indicator
7 SDA I2C Data (Open-Drain)
8 SCL I2C Clock Input
9 GND Ground
10 VCC Supply Voltage (2.7-5.5V)
11 BT/TOUT Thermistor Bias / Test Output
12 PAD Exposed Thermal Pad (GND)
  • Smartphone/Tablet Battery: System-side fuel gauging with direct battery connection providing less than 1% SOC accuracy for accurate runtime display
  • Portable Medical Devices: Precise remaining capacity tracking in infusion pumps and patient monitors where unexpected shutdown is unacceptable
  • Industrial Handhelds: Robust fuel gauging in barcode scanners and field instruments operating across wide temperature ranges
  • Embedded Battery Backup: Monitoring non-removable Li-Ion cells in smart meters and IoT gateways with sleep mode for minimal drain
  • E-Readers/Wearables: Ultra-low sleep current extends standby time in always-connected consumer devices
Model Brand Chemistry Algorithm Package
BQ27510DRZT-G3 TI Li-Ion Impedance Track 12-SON
BQ27520-G4 TI Li-Ion Impedance Track 12-SON
BQ27421-G1 TI Li-Ion Impedance Track Lite 9-SON
LC709203F onsemi Li-Ion HDQ 12-TWQFN
MAX17048 ADI Li-Ion ModelGauge 8-TDFN
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Quality Assurance

Quality is the core foundation of our long-term global cooperation. With over 20 years of experience in the electronic component industry, Materialparts has built a strict and standardized quality management system covering component sourcing, incoming inspection, full-batch testing, packaging and delivery. We are committed to delivering 100% genuine, high-reliability electronic components for industrial control, automotive electronics, consumer electronics and medical device industries, and fully safeguarding your production and R&D projects.

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Shipping & Payment

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5. Local Pickup in Shenzhen

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Contact Information

Email: info@materialparts.com

Tel / WhatsApp: +86 13760382860

Service & Packaging

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Contact Information

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Email: info@materialparts.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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