BQ27441DRZR-G1A - Battery Management System-Side Impedance IC SON-12

Resources:

Datasheet

System-Side Single-Cell Lithium-Ion Battery Fuel Gauge IC with Impedance Track Algorithm for Accurate Power Monitoring

The BQ27441DRZR-G1A is a system-side battery fuel gauge IC designed to provide accurate battery capacity monitoring for single-cell lithium-ion batteries. Developed by Texas Instruments, this device operates as a microcontroller peripheral and simplifies battery monitoring in embedded systems with minimal configuration and firmware requirements. It integrates the advanced Impedance Track algorithm to measure and predict battery parameters with high accuracy across varying load conditions.

The IC provides essential battery data such as remaining capacity in mAh, state-of-charge percentage, and battery voltage, enabling efficient power management in portable electronic devices. Fuel gauging requires only connections to PACK+ (P+) and PACK– (P–), making it ideal for both removable battery packs and embedded battery designs. Its compact SON-12 package with a small 2.50 mm × 4.00 mm footprint allows easy integration into space-constrained applications like wearables, IoT devices, and handheld electronics.

Key Features

• System-Side Fuel Gauge Architecture – Designed to work directly with the host system rather than inside the battery pack.
• Impedance Track Algorithm – Provides highly accurate battery capacity and state-of-charge estimation.
• Minimal Configuration Required – Simplifies integration with microcontrollers and embedded systems.
• Single-Cell Lithium Battery Support – Optimised for Li-Ion and Li-Polymer batteries.
• Real-Time Battery Information – Reports remaining capacity (mAh), state-of-charge (%), and battery voltage (mV).
• Simple Electrical Connections – Requires only PACK+ and PACK– connections for operation.
• I2C Communication Interface – Enables easy communication with host processors.
• Compact SON-12 Package – 2.50 mmx4.00 mm footprint for space-limited designs.