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Texas Instruments BQ24382DSGT
- Part No.:
- BQ24382DSGT
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
BQ24382DSGT.pdf
- Description:
- IC BATT PROTECTION LI-ION 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:510
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Product details
Overview
BQ24382DSGT 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 shutdown (140°C) 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 BQ24382DSGT datasheet, BQ24382DSGT pinout, BQ24382DSGT application, or BQ24382DSGT equivalent, key selection criteria include its 10.5-V input OVP threshold, 5-V regulated output, soft-start/soft-stop timing, open-drain FAULT signaling, and compatibility with 100-kΩ VBAT sense resistor networks.
Technical Context
The BQ24382DSGT operates as a linear regulator with fixed 5-V output regulation (VO(REG)) and monitors IN voltage against a 10.5-V OVP threshold (VOVP) with 225-mV hysteresis. It uses an internal N-channel pass FET controlled by CE and asserts FAULT low on OVP, BVOVP (>4.35 V), thermal shutdown (>140°C), or startup short-circuit detection.
During power-on, it executes an 8-step soft-start (625 μs/step) to limit inrush current and implements soft-stop during fault shutdown to suppress output voltage spikes. Battery voltage sensing occurs via the high-impedance VBAT pin (10 nA bias), requiring external 100-kΩ series resistor for safety per TI design guidance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Regulation Voltage | 5 V ±0.2 V - maintains stable 5-V supply to downstream charger ICs regardless of input variation below OVP threshold |
| Input OVP Threshold | 10.5 V (typ), 10.17–10.83 V (min/max) - disconnects system from unsafe input sources such as misregulated wall adapters |
| Battery OVP Threshold | 4.35 V ±0.05 V - disables pass FET if pack voltage exceeds safe Li-ion upper limit, preventing cell damage |
| Max Continuous Load Current | 1.7 A - supports charging circuits requiring up to 1.7-A front-end current delivery |
| Thermal Shutdown Temp | 140°C ±10°C - protects device and PCB from overheating under sustained overload or poor thermal layout |
| Standby Current | 100 μA (CE = HI) - enables ultra-low-power disable state for system-level power management |
| Soft-Start Duration | 5 ms total (8 × 625 μs steps) - controls gate ramp to limit inrush into capacitive loads and prevent input rail collapse |
Pinout & Package
Package: 2 mm × 2 mm, 8-pin WSON (DSG) with exposed thermal pad connected internally to VSS. Requires solder paste stencil and reflow profile compliant with JEDEC J-STD-020 for moisture sensitivity level 2a.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Input power supply | Accepts 3.3–30 V DC; must be bypassed with ≥1 μF ceramic capacitor near pin to suppress cable inductance-induced transients |
| VSS (Pin 2) | Ground reference | Primary ground connection; thermal pad must be soldered to PCB ground plane for thermal and electrical integrity |
| NC (Pins 3, 7) | No connect | Internally unused; must remain unconnected per TI datasheet - no routing or stitching allowed |
| FAULT (Pin 4) | Fault status indicator | Open-drain output pulled low on OVP/BVOVP/thermal/short-circuit; requires external pull-up (1–50 kΩ) to host logic rail |
| CE (Pin 5) | Chip enable control | Active-low enable; internal 200-kΩ pulldown allows direct GPIO control or floating for always-on operation |
| VBAT (Pin 6) | Battery voltage sense | High-impedance input (10 nA bias); must connect through 100-kΩ resistor to battery+ to prevent hazardous fault coupling |
| OUT (Pin 8) | Regulated output | Delivers 5-V, ≤1.7-A power to charging circuitry; requires ≥1 μF ceramic bypass capacitor adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| Input overvoltage protection | 10.5-V threshold with 225-mV hysteresis prevents damage from misregulated or faulty AC adapters |
| Soft-start / soft-stop sequencing | 5-ms controlled turn-on and gradual turn-off eliminate input/output voltage spikes during transitions |
| Integrated battery overvoltage monitoring | Detects >4.35-V pack voltage and disables pass FET before cell overcharge occurs |
| Open-drain FAULT signaling | Single-wire status interface compatible with 1.8-V to 5-V host microcontrollers without level-shifting |
| Thermal shutdown with hysteresis | 140°C trip point with 20°C hysteresis ensures reliable recovery after transient thermal overload |
Applications
| Smartphone Power Path Protection | USB-Powered Portable Audio |
|---|---|
|
Use Scenario: Mobile phone uses dual-input charging (USB + barrel jack) where adapter faults may expose battery to >6 V. IC Role / Device Role / Timing Role: Front-end protector that isolates battery from overvoltage events before charger IC sees hazardous input. Use Value: Prevents permanent Li-ion cell degradation or thermal runaway caused by adapter failure, validated at 10.5-V OVP threshold. |
Use Scenario: Portable Bluetooth speaker draws up to 1.5 A from USB-C PD source while charging internal 3.7-V Li-ion pack. IC Role / Device Role / Timing Role: Regulated 5-V pass switch with soft-start ensures clean power-up into large output capacitance without brownout. Use Value: Enables robust start-up under full load with <5-ms inrush control, avoiding host MCU reset due to input rail sag. |
| PDA System-Level Safety | Low-Power Handheld Medical Monitor |
|
Use Scenario: Legacy PDA uses non-standard 9-V wall adapter; aging components risk output drift above safe limits. IC Role / Device Role / Timing Role: Standalone OVP/BVOVP monitor asserting FAULT to suspend charging when thresholds exceeded. Use Value: Adds fail-safe layer independent of charger IC firmware, verified with 100-kΩ VBAT resistor for fault isolation. |
Use Scenario: Battery-powered ECG monitor requires guaranteed 5-V supply stability during clinical data acquisition. IC Role / Device Role / Timing Role: Low-quiescent (100 μA standby) enable-controlled guard that blocks all power paths during fault conditions. Use Value: Ensures uninterrupted operation by disabling only on confirmed hazards (OVP/BVOVP/thermal), not transient noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar front-end protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ24381DSGT | Identical 5-V regulation and 7.1-V OVP threshold; lower input OVP reduces margin against adapter overshoot | Suitable where input sources are tightly regulated (e.g., certified USB PD), but less robust for generic wall adapters | Select BQ24381DSGT only if system-level validation confirms input never exceeds 7.31 V under fault conditions |
| BQ24392RGET | Same 5-V output and 10.5-V OVP, but in 3-mm × 3-mm QFN-16 with enhanced thermal resistance (RθJA = 42°C/W) | Better suited for high-ambient or high-current (>1.5 A continuous) designs requiring improved thermal headroom | Choose BQ24392RGET when board layout allows larger footprint and junction temperature must stay <125°C at 1.7 A |
Compared with BQ24382DSGT, BQ24381DSGT offers reduced OVP margin for cost-sensitive USB-only systems, while BQ24392RGET trades compact size for superior thermal performance in thermally constrained industrial handhelds.
Availability
BQ24382DSGT is available at Aetrix Electronics and suitable for smartphone power path protection, USB-powered portable audio, PDA system-level safety, and low-power handheld medical monitors requiring stable component supply and long-term lifecycle support.
Supply support for BQ24382DSGT 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 with focus on reliability, precision, and power efficiency.
The BQ24382DSGT belongs to TI's bq2438x family of front-end protection ICs, designed specifically to safeguard Li-ion battery packs from input overvoltage, battery overvoltage, and thermal faults in space-constrained portable electronics.
FAQ
What is the exact input overvoltage protection threshold for BQ24382DSGT?
The BQ24382DSGT has a nominal input overvoltage protection (OVP) threshold of 10.5 V, with a guaranteed range of 10.17 V to 10.83 V across temperature and process variation. This value is specific to the BQ24382DSGT variant and differs from the 6.3-V threshold of the BQ24380 or 7.1-V threshold of the BQ24381. The OVP hysteresis is 225 mV, ensuring stable re-enablement after fault clearance.
How does BQ24382DSGT handle battery overvoltage events?
The BQ24382DSGT continuously monitors battery voltage via the VBAT pin and triggers protection when voltage exceeds 4.35 V (±0.05 V). Upon detection lasting longer than 176 μs, it performs a soft-stop turn-off of the internal pass FET and pulls the FAULT pin low. The FET remains off until battery voltage falls to 4.35 V minus hysteresis (≈4.03 V), at which point soft-start resumes. This behavior is identical across all bq2438x variants.
Can BQ24382DSGT operate without an external microcontroller?
Yes, BQ24382DSGT can operate autonomously without a microcontroller. Its CE pin has an internal 200-kΩ pulldown resistor, allowing direct connection to ground or leaving it floating to maintain always-on operation. FAULT signaling remains functional but unused unless monitored. All protection functions - OVP, BVOVP, thermal shutdown, and startup short-circuit detection - operate independently of host control.
What is the recommended resistor value between battery+ and the VBAT pin of BQ24382DSGT?
Texas Instruments specifies a 100-kΩ resistor for the VBAT sense network in the BQ24382DSGT datasheet. This value balances safety (limiting fault current to <250 μA if IN couples to VBAT) and accuracy (introducing only ~1 mV error in BVOVP detection due to 10-nA VBAT bias current). Values between 100 kΩ and 470 kΩ are acceptable; values outside this range compromise either safety or regulation precision.
Does BQ24382DSGT require input and output capacitors, and what are their minimum values?
Yes, BQ24382DSGT requires ≥1 μF ceramic capacitors at both IN and OUT pins, placed as close as possible to the respective pins. The IN capacitor mitigates voltage spikes caused by cable inductance during load transients; the OUT capacitor limits output overshoot during OVP events and serves as input decoupling for downstream charging ICs. X5R or X7R dielectrics with 10-V rating are recommended for reliability.
BQ24382DSGT 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)
BQ24382DSGT FAQ
1.How can I place an order for BQ24382DSGT through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ24382DSGT 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 BQ24382DSGT reliable?
The price and inventory of BQ24382DSGT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ24382DSGT is usually 5 days.
3.What payment methods are accepted for BQ24382DSGT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ24382DSGT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ24382DSGT?
BQ24382DSGT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ24382DSGT 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 BQ24382DSGT?
For technical support, including BQ24382DSGT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ24382DSGT requirements.
6.How does Aetrix verify that BQ24382DSGT is sourced from the original manufacturer or authorized distributors?
All BQ24382DSGT 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 BQ24382DSGT meets industry standards.
7.What is the process for return or replacement of BQ24382DSGT?
All BQ24382DSGT units undergo pre-shipment inspection (PSI). If there is an issue with BQ24382DSGT, 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 BQ24382DSGT part is unused and in its original packaging.
Return procedure for BQ24382DSGT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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