Balancing Controller IC for Battery Management

Product Specifications

Technical details and manufacturing context for Balancing Controller IC

Definition

A balancing controller IC is a specialized integrated circuit designed to monitor and control the voltage levels of individual battery cells within a series-connected pack. Its primary function is to ensure balanced charging and discharging, preventing overcharging, undercharging, and capacity degradation. The IC continuously measures cell voltages using precision sensing circuits. When imbalances exceed predetermined thresholds, it activates balancing mechanisms—typically passive dissipation through resistors or active charge redistribution—to equalize cell voltages, thereby optimizing battery performance and lifespan. This component is used in battery management systems for applications such as electric vehicles, energy storage systems, and portable electronics. The IC supports various battery chemistries including Li-ion, LiFePO4, and lead-acid, with a cell voltage range of 0.5–5.0 V. It provides a balancing current of 50–200 mA and achieves balancing accuracy of ±5 mV. The supply voltage ranges from 2.7 to 5.5 V, and quiescent current is 10–50 µA. Operating temperature spans -40 to 85 °C, suitable for automotive-grade environments. The IC can manage 4–16 cells, making it scalable for different pack sizes. It comes in a QFN-32 package, offering a compact footprint for space-constrained designs. The device features an I2C communication interface for standard monitoring and control. It has an ESD rating of ±2 kV (HBM) per IEC 61000-4-2. All specifications are reference values; verify model-specific parameters and standards with the legal manufacturer or supplier before procurement.

Working Principle

The IC continuously monitors cell voltages through precision voltage sensing circuits. When voltage imbalances exceed predetermined thresholds, it activates balancing mechanisms (typically passive dissipation through resistors or active charge redistribution) to equalize cell voltages, optimizing battery performance and lifespan.

Common Materials

Silicon, Copper, Plastic encapsulation

Technical Parameters

Parameter	Typical range	Notes & selection driver
Cell Voltage Range	0.5–5.0 V	Supports Li-ion, LiFePO4, and lead-acid chemistries
Balancing Current	50–200 mA	Higher current reduces balancing time
Balancing Accuracy	±5 mV	Ensures uniform cell voltages
Supply Voltage	2.7–5.5 V	Wide operating range for various battery systems
Quiescent Current	10–50 µA	Low power consumption for battery longevity
Operating Temperature	-40–85 °C	Automotive grade
Number of Cells	4–16 cells	Scalable for different pack sizes
Package Type	QFN-32	Compact footprint for space-constrained designs
ESD Rating	±2 kV	HBM modelIEC 61000-4-2
Communication Interface	I2C	Standard interface for monitoring and control

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Voltage Reference Part
Provides stable reference voltage for accurate cell voltage measurements

Material: Silicon
ADC (Analog-to-Digital Converter)
Converts analog cell voltage signals to digital values for processing

Material: Silicon
Balancing MOSFETs Part
Switching transistors that control current flow during balancing operations

Material: Silicon
Communication Interface
Enables data exchange with external microcontroller or BMS

Material: Copper/Silicon

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Cell Balancing Circuit

View system integration details

Manufacturers of Balancing Controller IC

Manufacturer profiles associated with Balancing Controller IC.

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Frequently Asked Questions

What is the purpose of a balancing controller IC?

It ensures that all cells in a battery pack maintain similar voltage levels during charging and discharging, preventing overcharge or undercharge and extending battery life.

Which battery chemistries are supported?

According to the directory, it supports Li-ion, LiFePO4, and lead-acid chemistries, with a cell voltage range of 0.5–5.0 V.

What is the balancing accuracy?

The balancing accuracy is ±5 mV, ensuring uniform cell voltages. This is a reference value; confirm with the manufacturer for specific models.

How many cells can this IC manage?

It can manage 4 to 16 cells, making it scalable for different battery pack sizes. Verify the exact number for your application with the supplier.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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temperature:	-40°C to +125°C (operating), -55°C to +150°C (storage)
voltage range:	2.5V to 5.5V (supply), up to 5V per cell (balancing)
current handling:	Up to 300mA per cell channel (typical)
communication interface:	I2C, SPI, or proprietary serial

Balancing Controller IC

Product Specifications

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

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