Texas Instruments BQ24210DQCR

Overview

BQ24210DQCR from Texas Instruments is a single-cell Li-ion linear battery charger IC with integrated bidirectional power path, 800-mA programmable charge current, input voltage dynamic power management (VBUS-DPM), and load mode for powering peripherals from battery via VBUS. It supports solar panel, USB, and wall adapter inputs in space-constrained portable devices.

For engineers reviewing the BQ24210DQCR datasheet, BQ24210DQCR pinout, BQ24210DQCR application, or BQ24210DQCR equivalent, key selection considerations include its 2-mm × 3-mm WSON-10 package, battery-tracking DPM threshold configuration, thermal regulation at 125°C, NTC-based temperature monitoring, and load-mode current limiting with 130–215 mA initial reverse current limit.

Technical Context

The BQ24210DQCR implements a three-phase linear charging algorithm-pre-charge, constant-current fast-charge, and constant-voltage taper-with internal safety timer (max 45,000 s) and thermal regulation at 125°C junction temperature. Its VBUS-DPM loop dynamically adjusts input current to prevent source collapse using either resistor-programmed thresholds (1 kΩ–10 kΩ on VDPM) or automatic battery-tracking mode (BAT + 100 mV).

In load mode, the device enables bidirectional conduction between BAT and VBUS through back-to-back FETs, delivering regulated battery voltage to external loads with 200–320 mV dropout and programmable reverse current limits. The TS pin interfaces with an NTC thermistor to enable temperature-dependent charge control and limited-power charging below 80% VTSB.

Key Specifications

Pinout & Package

Package: WSON-10 (2.00 mm × 3.00 mm), thermally enhanced with exposed VSS-connected pad. Requires PCB thermal pad connection to ground plane for thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BQ24075TRGTR, BQ24210DQCR provides superior solar-source compatibility via programmable DPM and smaller footprint, but lower max current; versus BQ24212DQCR, it lacks the auxiliary LDO yet retains identical charging and load-mode behavior at reduced BOM cost.

Availability

BQ24210DQCR is available at Aetrix Electronics and suitable for solar-powered portable devices, USB-powered accessories, and low-power medical sensors requiring stable component supply and long-term lifecycle support.

Supply support for BQ24210DQCR 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 solutions for industrial, automotive, and consumer applications.

The BQ24210DQCR belongs to TI's bq242xx family of highly integrated Li-ion linear chargers designed for space-constrained, energy-harvesting, and dual-role (charge + load) portable systems.

FAQ

What is the maximum input voltage the BQ24210DQCR can safely handle?

The BQ24210DQCR has an absolute maximum input voltage rating of 20 V on the VBUS pin, with recommended operating range up to 18 V. Its integrated overvoltage protection (OVP) activates at 7.5 V typical, clamping input current to protect downstream circuitry. This makes the BQ24210DQCR suitable for use with unregulated wall adapters and high-voltage solar arrays when paired with appropriate front-end filtering.

How does the BQ24210DQCR implement dynamic power management (DPM) for solar charging?

The BQ24210DQCR implements DPM by continuously monitoring VBUS and comparing it to a programmable threshold set via the VDPM pin resistor. When VBUS drops to this threshold-indicating source current limitation-the IC reduces charge current to stabilize input voltage. In battery-tracking mode (VDPM floating), the threshold automatically follows BAT + 100 mV, maximizing energy harvest from low-current solar panels without external microcontroller intervention.

Can the BQ24210DQCR power external loads from the battery when no input source is present?

Yes, the BQ24210DQCR supports load mode: when EN is low and VBUS falls below BAT minus hysteresis, the internal back-to-back FETs connect BAT to VBUS, delivering battery voltage to attached peripherals. Initial reverse current is limited to 130–215 mA, dropping to 40–70 mA after blanking time-enabling safe, self-contained operation for displays, sensors, or LEDs without requiring a separate boost converter.

What NTC thermistor configurations are supported by the BQ24210DQCR TS pin?

The BQ24210DQCR TS pin monitors a voltage divider formed by an NTC thermistor and a pull-up to VTSB (2.2 V). It recognizes four temperature bands-0°C, 10°C, 45°C, and 60°C-based on %VTSB thresholds (57%, 46%, 18.6%, 12%). Hysteresis (±1% VTSB) prevents chatter, and limited-power mode activates below 75% VTSB. No external components beyond the NTC and divider resistor are required.

What is the purpose of the VTSB pin on the BQ24210DQCR, and is an external capacitor required?

The VTSB pin provides a regulated 2.2 V bias reference for the NTC thermistor divider network. It is active only during charge mode and delivers up to 1 mA. No external capacitor is required-TI specifies zero capacitance on VTSB-and adding one may disrupt thermal response timing. The pin must remain unconnected except for the NTC divider; floating or loading it externally compromises temperature monitoring accuracy.