Texas Instruments BQ24061DRCR

Overview

BQ24061DRCR from Texas Instruments is a single-chip Li-ion/Li-polymer linear charge management IC with thermal regulation, ±0.5% voltage regulation accuracy, 1-A maximum charge current, and integrated power FET. It operates in conditioning, constant-current, and constant-voltage phases with minimum-current termination and programmable safety timer-designed for space-constrained portable devices like MP3 players and digital cameras.

For engineers reviewing the BQ24061DRCR datasheet, BQ24061DRCR pinout, BQ24061DRCR application, or BQ24061DRCR equivalent, key selection criteria include input overvoltage protection (6.5 V), battery absent detection enable, TMR-pin-based timer configuration, and compatibility with 3×3 mm MLP-10 packaging for compact PCB layouts.

Technical Context

The BQ24061DRCR implements dual-loop control: a current-regulation loop for fast-charge (100–1000 mA) and a voltage-regulation loop targeting 4.2 V ±0.5%, both dynamically managed by internal comparators and deglitch timers. Thermal regulation activates at 101–125°C junction temperature to reduce charge current and maintain safe operation without external intervention.

It features dedicated status outputs (STAT1/STAT2 open-collector), power-good indication (PG), and CE-controlled enable/disable functionality. Battery detection occurs via IDET(DOWN)/IDET(UP) current sources with 85–150 ms detection time, while recharge threshold is set at 75–135 mV below regulation voltage.

Key Specifications

Pinout & Package

Package: 10-pin DRC (3×3 mm MLP with exposed thermal pad connected to VSS).

Key Features

Applications

Equivalent & Alternatives

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

Compared with BQ24060DRCR and BQ24064DRCR, the BQ24061DRCR uniquely supports host-controlled charging via CE pin while maintaining 6.5 V OVP-making it optimal for USB-powered portable devices requiring software-managed charge enable/disable and thermal safety.

Availability

BQ24061DRCR is available at Aetrix Electronics and suitable for portable media players, digital cameras, handheld internet appliances, and PDAs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for BQ24061DRCR 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 leader specializing in analog, embedded processing, and power management technologies with over 50 years of innovation in energy-efficient electronics.

The BQ24061DRCR belongs to the bq2406x family of highly integrated linear Li-ion chargers designed specifically for space-constrained portable applications-emphasizing thermal safety, precision regulation, and minimal external component count.

FAQ

What is the input voltage range supported by the BQ24061DRCR?

The BQ24061DRCR supports an input voltage range of 3.5 V to 16.5 V depending on battery detection state: 3.5–4.35 V when battery absent detection is inactive, and 4.35–16.5 V when functional. Absolute maximum rating is 18 V, with transient tolerance up to 26 V for ≤87 hours. This allows compatibility with standard 5 V USB and higher-voltage wall adapters while ensuring robustness against input surges.

How does the BQ24061DRCR implement thermal regulation?

The BQ24061DRCR uses an internal temperature-sensing circuit that activates thermal regulation when junction temperature exceeds 101–125°C. It dynamically reduces charge current to maintain TJ(REG), preventing thermal runaway without external components. The regulation loop overrides both current and voltage control loops, and minimum current in thermal mode is 200–250 mA-ensuring continued safe charging even under high ambient or poor PCB thermal design.

Can the BQ24061DRCR be used without a battery connected?

Yes-the BQ24061DRCR supports LDO Mode when the TMR pin is left floating or pulled high, disabling charge termination, battery detection, and safety timer. In this mode, OUT regulates to 4.2 V with up to 1 A output, but current delivery drops at lower output voltages. A 200 Ω feedback resistor between BAT and OUT is recommended to stabilize operation without a battery, as specified in TI's SLUS689A application circuit.

What is the role of the CE pin on the BQ24061DRCR?

The CE (Charge Enable) pin on the BQ24061DRCR is an active-low digital input that controls charger activation: CE = LO enables charging, while CE = HI disables it and places the IC in standby mode with 100 µA typical quiescent current. Unlike BQ24060/BQ24064, the BQ24061DRCR includes this pin to allow host microcontroller or system logic to manage charge timing, power sequencing, or battery maintenance policies.

How is charge current programmed on the BQ24061DRCR?

Charge current on the BQ24061DRCR is programmed externally using a resistor (RISET) connected between the ISET pin and VSS. The relationship is IO(OUT) = K(SET) × V(SET) / RISET, where V(SET) = 2.45–2.55 V and K(SET) = 315–355 for 100–1000 mA range. RISET values from 0.7 kΩ to 10 kΩ set currents from 100 mA to 1 A-enabling precise, application-tailored charge rates without trimming or calibration.