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Texas Instruments BQ24380DSGT
- Part No.:
- BQ24380DSGT
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
BQ24380DSGT.pdf
- Description:
- IC BATT PROTECTION LI-ION 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:776
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Product details
Overview
BQ24380DSGT from Texas Instruments is a front-end protection IC for Li-ion battery charging circuits, functioning as a 5.5-V regulated linear pass switch with input overvoltage (6.3 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 AC adapters.
For engineers reviewing the BQ24380DSGT datasheet, BQ24380DSGT pinout, BQ24380DSGT application, or BQ24380DSGT equivalent, key selection criteria include its 5.5-V regulated output, 6.3-V input OVP threshold, 4.35-V battery OVP, soft-start/soft-stop timing, and open-drain FAULT status reporting under fault conditions.
Technical Context
The BQ24380DSGT operates as a linear regulator with fixed 5.5-V output regulation (VO(REG)) and monitors IN voltage against 6.3-V OVP threshold (VOVP) and VBAT against 4.35-V battery overvoltage threshold (BVOVP). It implements deglitch timers (tDGL(BVovp) = 176 μs, tREC(OVP) = 8 ms) and uses soft-start (8-step, 625 μs/step) and soft-stop to manage inrush and voltage spikes.
It features active-low enable (CE) with internal 200-kΩ pulldown, open-drain FAULT output indicating input OVP, battery OVP, thermal shutdown, or startup short-circuit, and supports external VBAT sensing via 100-kΩ resistor to prevent hazardous voltage injection during failure.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Regulation Voltage | 5.5 V ±0.2 V - maintains stable 5.5-V supply to downstream charger IC regardless of input variation up to OVP threshold |
| Input OVP Threshold | 6.3 V typ (6.1–6.5 V) - disconnects IN from OUT within 200 ns when input exceeds safe level, preventing damage to battery and system |
| Battery OVP Threshold | 4.35 V ±0.05 V - disables pass FET if sensed battery voltage exceeds safe Li-ion upper limit, with 200–320 mV hysteresis |
| Max Load Current | 1.7 A - supports high-current portable applications while maintaining thermal safety under continuous operation |
| Dropout Voltage | 280 mV at 1 A - enables efficient regulation even at low VIN–VOUT differentials, minimizing power loss and heat generation |
| Operating Junction Temp | –40°C to +125°C - ensures reliable performance across industrial and consumer ambient temperature ranges |
| Thermal Shutdown | 140°C ±10°C - protects die integrity by disabling pass FET before irreversible thermal damage occurs |
Pinout & Package
Package: 2 mm × 2 mm, 8-pin WSON (DSG) with exposed thermal pad electrically connected to VSS; requires PCB thermal pad connection to ground plane for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Input power supply | Accepts 3.3–30 V DC input; must be bypassed with ≥1 μF ceramic capacitor near pin to suppress cable-induced transients |
| VSS (Pin 2) | Ground reference | Primary ground return; connects internally to exposed thermal pad-must be soldered to PCB ground plane |
| NC (Pins 3, 7) | No-connect terminal | Internally reserved for test; must remain unconnected in application circuit |
| FAULT (Pin 4) | Open-drain fault indicator | Pulled low during input OVP, battery OVP, thermal shutdown, or startup short-circuit; requires external pull-up resistor (1–50 kΩ) |
| CE (Pin 5) | Active-low enable control | Drives internal pass FET on (CE = LOW) or off (CE = HIGH); internal 200-kΩ pulldown allows floating for default-enable operation |
| VBAT (Pin 6) | Battery voltage sense input | Monitors pack voltage via external 100-kΩ resistor to limit fault-induced current; bias current ≤10 nA minimizes sensing error |
| OUT (Pin 8) | Regulated output | Delivers 5.5-V regulated power to charging circuit; requires ≥1 μF ceramic bypass capacitor adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| Input Overvoltage Protection | 6.3-V threshold with 110-mV hysteresis prevents false triggering during transient surges while ensuring fast disconnection |
| Soft-Start Sequence | 8-step current ramp (625 μs/step) limits inrush into capacitive loads, eliminating input voltage ringing caused by adapter cable inductance |
| Soft-Stop Shutdown | Gradual gate-drive reduction during fault events prevents output voltage spikes that could damage downstream components |
| Startup Short-Circuit Detection | 5-ms current clamp window (IO(SC) = 1.5 A typ) identifies overload before full startup, enabling retry-based recovery without manual reset |
| Integrated Thermal Monitoring | Digital junction temperature sensing triggers immediate FET disable at 140°C, with 20°C hysteresis to prevent oscillation near trip point |
Applications
| Smartphone Power Management | Portable Medical Device Charging |
|---|---|
Use Scenario: AC adapter supplies power to Li-ion battery charging circuit in compact smartphone design with tight thermal constraints. IC Role / Device Role / Timing Role: Front-end protector isolating charger IC from adapter faults; regulates 5.5-V rail and asserts FAULT on OVP/BVOVP/thermal events. Use Value: Prevents catastrophic battery overcharge and system damage during adapter failure, enabling field-reliable single-cell Li-ion operation. | Use Scenario: Battery-powered handheld diagnostic instrument requiring certified-safe charging under variable wall adapter inputs. IC Role / Device Role / Timing Role: Safety-critical interface between unregulated input and medical-grade charger IC; provides redundant OVP and BVOVP with deterministic fault signaling. Use Value: Meets IEC 62368-1 creepage/clearance and fault containment requirements via isolated sensing and fail-safe shutdown. |
| MP3 Player Battery Protection | Industrial Handheld Scanner |
Use Scenario: Low-cost consumer audio player using generic USB wall adapters where input voltage tolerance is undefined. IC Role / Device Role / Timing Role: Input conditioner and battery guard; clamps output to 5.5 V, blocks >6.3 V inputs, and halts charge if battery reaches 4.35 V. Use Value: Eliminates need for costly custom adapter qualification and extends cycle life by enforcing precise voltage ceilings. | Use Scenario: Ruggedized barcode scanner operating in warehouses with fluctuating 5–12 V DC power sources and frequent hot-plug events. IC Role / Device Role / Timing Role: Robust front-end switch with 30-V absolute max rating, soft-start for cable inductance, and FAULT-driven host alerting. Use Value: Enables seamless adapter swapping without brownouts or latch-up, reducing field service incidents and downtime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar front-end protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ24390RGET | Higher 1.8-A current rating; 5.05-V output; integrated 12-V OVP; no VBAT pin (uses internal sensing) | Targeted for higher-power tablets; lacks external battery voltage monitoring flexibility | Select BQ24390RGET only if 1.8-A capability and simplified layout outweigh need for adjustable BVOVP and external VBAT isolation |
| TPS259210DBVR | Adjustable OVP (2.5–18.5 V); no battery OVP or regulation; 2.9-A current limit; faster 120-ns OVP response | General-purpose load switch-not designed for Li-ion battery protection or regulated output | Choose TPS259210DBVR for non-battery systems needing programmable OVP and higher current, but not for BVOVP-critical charging paths |
Compared with BQ24380DSGT, BQ24390RGET offers higher current and integrated OVP but sacrifices external VBAT sensing and precise 4.35-V BVOVP; TPS259210DBVR provides superior OVP speed and adjustability but lacks battery-specific protection and regulation-making BQ24380DSGT optimal for cost-sensitive, safety-focused single-cell Li-ion front-end designs.
Availability
BQ24380DSGT is available at Aetrix Electronics and suitable for smartphone power management, portable medical device charging, MP3 player battery protection, and industrial handheld scanner applications requiring stable component supply and long-term lifecycle support.
Supply support for BQ24380DSGT 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 delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The BQ24380DSGT belongs to TI's battery front-end protection product line, engineered specifically to safeguard Li-ion charging circuits from input overvoltage, battery overvoltage, thermal runaway, and startup short-circuits in space-constrained portable devices.
FAQ
What is the regulated output voltage of the BQ24380DSGT?
The BQ24380DSGT provides a fixed 5.5-V regulated output (VO(REG)) with ±0.2-V tolerance across temperature and load. This voltage is maintained as long as the input remains below the 6.3-V overvoltage threshold and above the 2.8-V undervoltage lockout. The BQ24380DSGT achieves this using an internal linear pass FET and feedback loop, ensuring stable power delivery to downstream charging ICs independent of input fluctuations.
How does the BQ24380DSGT respond to input overvoltage events?
When the input voltage exceeds the 6.3-V threshold (VOVP), the BQ24380DSGT turns off its internal pass FET within 200 ns, isolating the OUT pin from IN. Simultaneously, the open-drain FAULT pin is pulled low to signal the host controller. After the input falls below VOVP minus hysteresis (≈6.15 V), the BQ24380DSGT waits 8 ms (tREC(OVP)) before re-enabling the FET via soft-start to confirm input stability.
Can the BQ24380DSGT protect against overvoltage on the battery side?
Yes-the BQ24380DSGT continuously monitors battery voltage via the VBAT pin and triggers protection if it exceeds 4.35 V (BVOVP) for longer than 176 μs (tDGL(BVovp)). Upon detection, it executes soft-stop to disable the pass FET and pulls FAULT low. Recovery occurs only after battery voltage drops to 4.35 V minus hysteresis (≈4.15 V), ensuring safe re-engagement without oscillation.
What is the purpose of the VBAT pin on the BQ24380DSGT?
The VBAT pin on the BQ24380DSGT senses battery voltage through an external 100-kΩ resistor to detect overvoltage conditions. This isolation prevents hazardous 30-V input faults from directly reaching the battery during device failure. With ≤10-nA bias current, the resistor introduces negligible error (<1 mV) in the 4.35-V threshold, preserving accuracy while enhancing system safety.
Does the BQ24380DSGT require external components for basic operation?
Yes-the BQ24380DSGT requires at minimum two 1-μF ceramic bypass capacitors: one between IN and VSS, and another between OUT and VSS, placed adjacent to their respective pins. Additionally, a 100-kΩ resistor is required between VBAT and battery positive for safe sensing. CE may be left floating (enabled by internal pulldown) or driven externally; FAULT needs a pull-up resistor (1–50 kΩ) to interface with host logic.
BQ24380DSGT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Battery Protection
- Battery Chemistry:
- Lithium Ion
- Number of Cells:
- -
- Fault Protection:
- Over Current, Over Temperature, Over/Under Voltage, Short Circuit
- Interface:
- -
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-WSON (2x2)
BQ24380DSGT FAQ
1.How can I place an order for BQ24380DSGT through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ24380DSGT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for BQ24380DSGT reliable?
The price and inventory of BQ24380DSGT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ24380DSGT is usually 5 days.
3.What payment methods are accepted for BQ24380DSGT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ24380DSGT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ24380DSGT?
BQ24380DSGT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ24380DSGT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for BQ24380DSGT?
For technical support, including BQ24380DSGT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ24380DSGT requirements.
6.How does Aetrix verify that BQ24380DSGT is sourced from the original manufacturer or authorized distributors?
All BQ24380DSGT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BQ24380DSGT meets industry standards.
7.What is the process for return or replacement of BQ24380DSGT?
All BQ24380DSGT units undergo pre-shipment inspection (PSI). If there is an issue with BQ24380DSGT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The BQ24380DSGT part is unused and in its original packaging.
Return procedure for BQ24380DSGT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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