System side Impedance Track™ fuel gauge with integrated LDO.
Product details
Parameters
Package | Pins | Size
Features
- Single-Series Cell Li-Ion Battery Fuel Gauge
Resides on System Board- Integrated 2.5 VDC LDO
- External Low-Value 10-mΩ Sense Resistor
- Patented Impedance Track™ Technology
- Adjusts for Battery Aging, Self-Discharge,
Temperature, and Rate Changes - Reports Remaining Capacity, State-of-Charge
(SOC), and Time-to-Empty - Optional Smoothing Filter
- Battery State-of-Health (Aging) Estimation
- Supports Embedded or Removable Packs with
up to 32A hr Capacity - Accommodates Pack Swapping With 2
Separate Battery Profiles
- Adjusts for Battery Aging, Self-Discharge,
- Microcontroller Peripheral Supports:
- 400-kHz I2C Serial Interface
- 32 Bytes of Scratch-Pad FLASH NVM
- Battery Low Digital Output Warning
- Configurable SOC Interrupts
- External Thermistor, Internal Sensor, or Host-
reported Temperature Options
- Tiny 15-pin, 2610 × 1956 µm, 0.5-mm pitch
NanoFree™ (DSBGA) Package
Description
The Texas Instruments bq27520-G4 system-side Li-Ion battery fuel gauge is a microcontroller peripheral that provides fuel gauging for single-cell Li-Ion battery packs. The device requires little system microcontroller firmware development. The fuel gauge resides on the main board of the system and manages an embedded battery (non-removable) or a removable battery pack.
The fuel gauge uses the patented Impedance Track™ algorithm for fuel gauging, and provides information such as remaining battery capacity (mAh), state-of-charge (%), run-time to empty (minimum), battery voltage (mV), temperature (°C), and state of health (%).
Battery fuel gauging requires only PACK+ (P+), PACK– (P–), and optional Thermistor (T) connections to a removable battery pack or embedded battery circuit. The device uses a 15-ball NanoFree™ (DSBGA) package in the nominal dimensions of 2610 × 1956 µm with 0.5-mm lead pitch. It is ideal for space-constrained applications.
Technical documentation
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
This evaluation module (EVM) is a complete evaluation system for the bq27520. The EVM includes one bq27520 circuit module, a current sense resistor, and one thermistor. The circuit module includes one bq27520 integrated circuit and all other onboard components necessary to monitor and predict (...)
Features
- Complete evaluation system for the bq27520 gas gauge with Impedance Track™ technology
- Populated circuit module for quick setup
- Personal computer (PC) software and interface board for easy evaluation
- Software that allows data logging for system analysis
- Ability to upgrade to the latest firmware version (...)
Software development
Features
- Real-time Gauge Dashboard for monitoring basic registers
- Full register access and logging
- Full data memory access and logging
- Product configuration and monitoring tools
- Import and export of product configurations
- Calibration and test automation
- Export of FS files for the target production environment
Gauging Parameter Calculator Chemistry ID matching for Impedance track gas gauges (GPCCHEM) is a math calculation and (...)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
DSBGA (YZF) | 15 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
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