Mfr Part #:

bq2031

The Texas Instruments BQ2031 is a switch-mode lead-acid battery charger IC. It offers user-selectable charge algorithms and termination methods for optimized battery charging.

✓ Total Stock: 52 pcs

$ Price Range: $1.29

bq2031 Available from 1 distributor

✓ Authorised

✓ Non-Authorised

Distributor		Stock	Pricing	MOQ	PKG	Lead Time	Date Code	On Order Quantity	On Order Delivery
Optech Co.,Limited ✓ Non-Authorised Inventory information	52 pcs On Request	52 pcs	On Request	1	On Request	On Request	07+	On Request	On Request

bq2031 Specifications Quick View

Most important parameters for selection – full specs in datasheet.

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Category	New Products
Manufacturer Name	Texas Instruments
Control Interface	Standalone (RC-Settable)
Features	Conforms to battery manufacturers' charge recommendations for cyclic and float charge, Pre-charge qualification detects shorted, opened, or damaged cells and conditions battery, Charging continuously qualified by temperature and voltage limits, Internal temperature-compensated voltage reference, Pulse-width modulation control (Ideal for high-efficiency switch-mode power conversion, Configurable for linear or gated current use), Direct LED control outputs display charge status and fault conditions
Operating Temperature Range	-20 to 70°C

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bq2031 Description

Short technical summary and product information.

The Texas Instruments BQ2031 is a dedicated IC designed for optimizing the charging of lead-acid chemistry batteries. It utilizes a flexible pulse-width modulation regulator, enabling constant-voltage, constant-current, or pulsed-current charging modes.

Key features include pin-selectable charge algorithms such as Two-Step Voltage, Two-Step Current, and Pulsed Current. Charge termination can be configured by maximum voltage, Δ2V, minimum current, or maximum time. The device incorporates pre-charge qualification to detect and condition battery cells before high-current charging, and continuously monitors temperature and voltage limits for safety.

Designed for high-efficiency switch-mode power conversion, the BQ2031 minimizes power dissipation, making it suitable for high charge current applications. It operates within a 4.5V to 5.5V input voltage range and supports up to 6 series lead-acid cells, with a maximum charge current of 2A. The IC provides direct LED control outputs for displaying charge status and fault conditions.

The BQ2031 is available in a 16-pin narrow DIP or SOIC package. Its switch-mode buck control topology and standalone interface offer design flexibility.

bq2031 Quick Information

Product Type: Battery Charger IC

Canonical Name: BQ2031 Lead-Acid Fast-Charge IC

Subcategory: Lead-Acid Battery Charger

bq2031 Compliance

RoHS Status: RoHS Compliant

Moisture Sensitivity Level (MSL): 1 Unlimited

REACH Status: REACH Unaffected

bq2031 Estimated Pricing

Qty	Low	High
1+	$1.29	$1.29

Estimated market price range - modelled values for guidance only, not live distributor offers.

bq2031 Features

Optimizes charging for lead-acid batteries.
User-selectable charge algorithms and termination.
Pre-charge qualification for battery conditioning.
High-efficiency switch-mode power conversion.
Direct LED outputs for status and fault indication.

bq2031 Applications

Ideal for lead-acid battery charging systems.
Suitable for cyclic and float charge applications.
Used in portable power devices.
Applicable in uninterruptible power supplies.

bq2031 FAQs

7 frequently asked questions generated from this part’s specifications.

What type of batteries does the BQ2031 charge?

The BQ2031 is designed to optimize charging of lead-acid chemistry batteries.

What are the selectable charge algorithms for the BQ2031?

The BQ2031 offers pin-selectable charge algorithms including Two-Step Voltage with temperature-compensated constant-voltage maintenance, Two-Step Current with constant-rate pulsed current maintenance, and Pulsed Current (hysteretic, on-demand).

How does the BQ2031 terminate fast charging?

Fast (bulk) charging is terminated based on maximum voltage, Δ2V, minimum current, or maximum time.

What is the maximum charge current for the BQ2031?

The maximum charge current for the BQ2031 is 2A.

What is the input voltage range for the BQ2031?

The BQ2031 operates with an input voltage range from 4.5V to 5.5V.

What is the operating temperature range of the BQ2031?

The BQ2031 operates within a temperature range of -20°C to 70°C.

What package options are available for the BQ2031?

The BQ2031 is available in a 16-pin narrow DIP or SOIC package.