Texas Instruments BQ24382DSGR

Overview

BQ24382DSGR from Texas Instruments is a front-end protection IC for Li-ion battery charging circuits, functioning as a 5-V regulated linear pass switch with input overvoltage (10.5 V typ), battery overvoltage (4.35 V), and thermal (140°C) shutdown protection. It delivers up to 1.7 A load current in a 2 mm × 2 mm WSON-8 package and is used in mobile phones and handheld devices to isolate faulty adapters before damage occurs.

For engineers reviewing the BQ24382DSGR datasheet, BQ24382DSGR pinout, BQ24382DSGR application, or BQ24382DSGR equivalent, this page provides verified functional mode timing (tREC(OVP) = 8 ms, tDGL(BVovp) = 176 µs), real-world fault response behavior, regulator dropout (280 mV @ 1 A), standby current (100 µA), and precise OVP/BVOVP thresholds confirmed per SLUS805C Rev C.

Technical Context

The BQ24382DSGR operates as a linear regulator with fixed 5-V output regulation (VO(REG) = 4.8–5.2 V), actively monitoring IN voltage against VOVP = 10.17–10.83 V and VBAT against BVOVP = 4.3–4.4 V. Its internal N-channel pass FET enables soft-start (8-step, 625 µs/step) and soft-stop to suppress inrush and voltage spikes.

Fault detection is hardware-automated: FAULT asserts low on input overvoltage, battery overvoltage (>176 µs deglitch), short-circuit at startup (IO(SC) = 1.3–1.7 A), or die temperature >140°C. CE is active-low with internal 200 kΩ pulldown; FAULT is open-drain with VOL = 0.2 V @ 5 mA sink.

Key Specifications

Pinout & Package

Package: 2 mm × 2 mm, 8-pin WSON with exposed thermal pad (DSG). Thermal pad must be soldered to PCB ground plane for thermal and electrical integrity; VSS pin remains primary ground connection.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar front-end protection applications.

Compared with BQ24382DSGR, BQ24381DSGR offers identical form/fit/function except reduced OVP threshold (7.1 V vs 10.5 V), while TPS259211RGER provides wider OVP adjustability but omits battery voltage monitoring and thermal protection - making BQ24382DSGR uniquely suited for standalone Li-ion charging safety.

Availability

BQ24382DSGR is available at Aetrix Electronics and suitable for smartphone adapter interfaces, USB-powered handheld devices, Li-ion PDA power management, and MP3 player battery safety circuits requiring stable component supply across production lifecycles.

Supply support for BQ24382DSGR 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

The BQ24382DSGR belongs to TI's battery front-end protection IC product line, designed specifically to safeguard Li-ion charging systems from adapter faults, battery overvoltage, and thermal runaway without host processor intervention.

FAQ

What is the exact input overvoltage protection threshold for BQ24382DSGR?

The BQ24382DSGR has a guaranteed input overvoltage protection threshold of 10.17 V (min) to 10.83 V (max) at 25°C, with 150–300 mV hysteresis. This value is confirmed in Section 6.5 of the SLUS805C datasheet and is specific to the BQ24382 variant - distinct from the 6.3 V (bq24380) or 7.1 V (bq24381) thresholds. The BQ24382DSGR uses this higher threshold to tolerate 9-V adapter transients while blocking hazardous overvoltages.

Does BQ24382DSGR provide battery overvoltage protection, and how does it behave?

Yes, the BQ24382DSGR provides autonomous battery overvoltage protection with a fixed 4.3–4.4 V threshold and 200–320 mV hysteresis. When VBAT exceeds 4.35 V for longer than 176 µs, the device disables the pass FET using soft-stop and pulls FAULT low. Recovery occurs only after VBAT falls below 4.15–4.2 V. This function is fully hardware-based and requires no host interaction - a core differentiator of the BQ24382DSGR versus generic load switches.

What is the maximum continuous output current supported by BQ24382DSGR?

The BQ24382DSGR supports up to 1.7 A of continuous output current at the OUT pin under recommended operating conditions (TJ ≤125°C, adequate PCB copper pour). This rating is validated in Section 6.3 of the SLUS805C datasheet and accounts for thermal derating - actual achievable current depends on layout, ambient temperature, and airflow. The BQ24382DSGR achieves this with <280 mV dropout at 1 A, minimizing power loss and heat generation.

How does the CE pin function on BQ24382DSGR, and what is its default state?

The CE pin on the BQ24382DSGR is an active-low enable input with an internal 200 kΩ pulldown resistor. When left unconnected or pulled high, the device remains disabled (pass FET off); pulling CE low enables the device and initiates soft-start. This behavior is explicitly defined in the Pin Functions table (Section 5) of SLUS805C. The BQ24382DSGR's CE logic allows flexible host control or simple permanent enable via ground tie - no external pullup is required.

What package type and thermal characteristics apply to BQ24382DSGR?

The BQ24382DSGR uses the DSG (WSON-8) package: 2.00 mm × 2.00 mm body with exposed thermal pad. Its junction-to-board thermal resistance (RθJB) is 33.9°C/W, and junction-to-ambient (RθJA) is 64°C/W - values confirmed in Section 6.4 of SLUS805C. The BQ24382DSGR requires the thermal pad to be soldered to a dedicated PCB ground plane; VSS pin alone cannot handle thermal dissipation. This package enables high-density layouts while maintaining safe operation at 1.7 A.