Texas Instruments BQ24080DRCR

Overview

BQ24080DRCR from Texas Instruments is a single-chip, 1-A linear Li-ion/Li-polymer battery charger IC with integrated power FET, current sensing, and dual open-drain status outputs (STAT1, STAT2). It delivers ±0.35% voltage regulation accuracy at 4.2 V, supports precharge/fast-charge/constant-voltage charging phases, and features automatic recharge when battery voltage drops below 4.085 V. It is used in space-constrained portable devices such as MP3 players and digital cameras.

For engineers reviewing the BQ24080DRCR datasheet, BQ24080DRCR pinout, BQ24080DRCR application, or BQ24080DRCR equivalent, key selection considerations include its 1-A programmable charge current via external R_SET, 7-hour fast-charge safety timer, sleep-mode current of ≤5 µA, PG output for input power detection, and CE input for charge enable control.

Technical Context

The BQ24080DRCR implements a three-phase linear charging algorithm: preconditioning (2–100 mA at V_OUT < 2.8–3.2 V), constant-current (up to 1 A set by R_SET), and constant-voltage (4.2 V ±0.35%). Charge termination occurs at minimum current (2–100 mA) with backup 7-hour timer fault protection.

It integrates an internal power FET and current-sense circuitry, eliminating external MOSFETs and sense resistors. The ISET pin provides both charge-current programming and real-time analog current monitoring via proportional current sourcing, enabling host microcontroller feedback without additional ADC channels.

Key Specifications

Pinout & Package

Package: 10-pin VSON (DRC), 3.00 mm × 3.00 mm, exposed thermal pad electrically connected to VSS.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Li-ion linear charger applications.

Compared with BQ24080DRCR, BQ24081DRCR adds temperature qualification but removes PG/CE control, while TP4056 offers lower cost at the expense of status visibility, programmable precharge, and hardware-enforced timing safety-making BQ24080DRCR optimal for balanced performance, safety, and system integration in portable consumer devices.

Availability

BQ24080DRCR is available at Aetrix Electronics and suitable for MP3 players, digital cameras, and internet appliances requiring stable component supply, long-term production continuity, and automotive-grade reliability validation.

Supply support for BQ24080DRCR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor company specializing in analog and embedded processing technologies, with leadership in power management ICs and battery charging solutions.

The BQ24080DRCR belongs to TI's bq240xx family of highly integrated linear Li-ion chargers, designed specifically for space-constrained portable electronics requiring autonomous, safe, and low-component-count battery management.

FAQ

What is the maximum input voltage rating for the BQ24080DRCR?

The BQ24080DRCR has an absolute maximum input voltage rating of 7 V on the IN pin. Operation above this level risks permanent damage. The recommended operating range is 4.5 V to 6.5 V, aligning with standard 5-V USB adapters and 6-V wall adapters. Exceeding 7 V-even briefly-can trigger latch-up or gate oxide breakdown in the internal power FET.

How does the BQ24080DRCR determine when to terminate charging?

The BQ24080DRCR terminates charging when the battery current drops to the programmed termination threshold (2–100 mA), detected during the constant-voltage phase. This threshold is set by the same R_SET resistor used for fast-charge current. A fixed 7-hour safety timer provides hardware backup-if termination isn't achieved within that window, the BQ24080DRCR disables charging and asserts FAULT on STAT1/STAT2.

Can the BQ24080DRCR be used without connecting the PG pin?

Yes, the BQ24080DRCR operates fully without the PG pin connected. PG is an optional open-drain output indicating valid input voltage presence. Leaving it unconnected (with appropriate pull-up if interfaced to a microcontroller) does not affect charging functionality, status reporting via STAT1/STAT2, or safety features. Its omission only forfeits system-level power-good signaling capability.

What is the purpose of the CE pin on the BQ24080DRCR?

The CE (Charge Enable) pin on the BQ24080DRCR is an active-low digital input that controls charger activation. When CE is pulled low, charging proceeds normally; when CE is high, the device enters low-power mode and disables all charge functions. A high-to-low transition on CE also resets all internal timers and clears fault conditions, enabling clean restarts in host-controlled systems.

Does the BQ24080DRCR support automatic recharge after charge termination?

Yes, the BQ24080DRCR supports automatic recharge. After charge termination, it continuously monitors the battery voltage at the OUT pin. When the voltage falls below the recharge threshold (4.085–4.115 V), the BQ24080DRCR automatically restarts the full three-phase charging cycle-preconditioning, constant-current, and constant-voltage-without requiring host intervention or external wake-up signals.