BQ27520-G4 System Side Impedance Track™ Fuel Gauge With Integrated LDO.

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.

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
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

Parametrics

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Part number	Order	Number of series cells	Cell chemistry	Battery capacity (Max) (mAh)	Communication interface	Battery capacity (Min) (mAh)	External capacity indication	Implementation	Gas gauge algorithm	Features	Operating temperature range (C)	Package Group	Package size: mm2:W x L (PKG)
BQ27520-G4	Order now	Single Cell	Li-Ion/Li-Polymer	32000	I2C	100	None	System	Impedance Track		-40 to 85	DSBGA \| 15	15DSBGA: 5 mm2: 2.75 x 1.75 (DSBGA \| 15)
BQ27220	Order now	Single Cell	Li-Ion/Li-Polymer	29000	I2C	100	None	Pack System	CEDV	CEDV	-40 to 85	DSBGA \| 9	9DSBGA: 3 mm2: 1.75 x 1.75 (DSBGA \| 9)
BQ27320	Order now	Single Cell	Li-Ion/Li-Polymer	29000	I2C	100	None	Pack System	CEDV		-40 to 85	DSBGA \| 15	15DSBGA: 5 mm2: 2.75 x 1.75 (DSBGA \| 15)
BQ27426	Order now	Single Cell	Li-Ion/Li-Polymer	14000	I2C	100	None	System	Impedance Track		-40 to 85	DSBGA \| 9	9DSBGA: 3 mm2: 1.75 x 1.75 (DSBGA \| 9)
BQ27546-G1	Order now	Single Cell	Li-Ion/Li-Polymer	32000	HDQ I2C	100	None	Pack	Impedance Track	SHA-1 Authentication	-40 to 85	DSBGA \| 15	15DSBGA: 5 mm2: 2.75 x 1.75 (DSBGA \| 15)
BQ27621-G1	Order now	Single Cell	Li-Ion/Li-Polymer	32000	I2C	100	None	System	Dynamic Voltage Correlation	No Sense Resistor Required	-40 to 85	DSBGA \| 9	9DSBGA: 3 mm2: 1.75 x 1.75 (DSBGA \| 9)
BQ35100	Order now	Single Cell	Primary Lithium	32000	I2C	100	None	Pack System	Primary	Accumulated Coulomb Count	-40 to 85	TSSOP \| 14	14TSSOP: 32 mm2: 6.4 x 5 (TSSOP \| 14)

BQ27520-G4 ACTIVE This product has been released to the market and is available for purchase. For some products, newer alternatives may be available. System Side Impedance Track™ Fuel Gauge With Integrated LDO.

Description

Features

Parametrics

BQ27520-G4
ACTIVE

This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.

System Side Impedance Track™ Fuel Gauge With Integrated LDO.