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Texas Instruments BQ24380DSGR
- Part No.:
- BQ24380DSGR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
BQ24380DSGR.pdf
- Description:
- IC BATT PROTECTION LI-ION 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:3,741
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Product details
Overview
BQ24380DSGR from Texas Instruments is a front-end protection IC for Li-ion battery charging circuits, providing input overvoltage (6.3 V typ), battery overvoltage (4.35 V), and thermal shutdown (140°C) protection. It operates as a linear regulator with 5.5-V regulated output, supports up to 1.7-A load current, and features soft-start/soft-stop to prevent inrush and voltage spikes - deployed in mobile phones and low-power handheld devices.
For engineers reviewing the BQ24380DSGR datasheet, BQ24380DSGR pinout, BQ24380DSGR application, or BQ24380DSGR equivalent, key selection considerations include its 6.3-V input OVP threshold, 4.35-V battery OVP trip point, 5.5-V LDO-mode output regulation, 8-pin WSON package with exposed thermal pad, and open-drain FAULT signaling for host microcontroller integration.
Technical Context
The BQ24380DSGR implements a single-channel linear pass FET control architecture with independent monitoring loops for input voltage (OVP at 6.3 V), battery voltage (BVOVP at 4.35 V), die temperature (shutdown at 140°C), and startup short-circuit (1.5-A detection threshold). Its functional block includes deglitch timers (tDGL(BVovp) = 176 µs, tREC(OVP) = 8 ms) and soft-start sequencing (8 steps × 625 µs).
It operates in three distinct modes: OPERATION (IN > UVLO, no fault), POWER-DOWN (IN < 2.8 V), and POWER-ON RESET (with 8-ms deglitch delay and controlled soft-start). The CE pin enables active disable with internal 200-kΩ pulldown, while FAULT provides open-drain status reporting for all four fault conditions - OVP, BVOVP, overtemperature, and startup short-circuit.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input OVP Threshold | 6.3 V typical - disconnects IN from OUT within 200 ns when adapter voltage exceeds safe limit |
| Battery OVP Threshold | 4.35 V ±15 mV - disables pass FET if pack voltage exceeds Li-ion safe upper limit | Regulated Output Voltage | 5.5 V - maintains stable 5.5-V rail for downstream charger ICs regardless of input variation (3.3–6 V) |
| Max Continuous Load Current | 1.7 A - supports high-current portable applications without external current-sense components |
| Dropout Voltage | 280 mV at 1 A - ensures minimal power loss and thermal rise under full load |
| Operating Junction Temp | –40°C to +125°C - validated for industrial ambient and sustained high-power operation |
| Package Thermal Resistance | RθJA = 64°C/W - enables compact PCB layout with standard 2-layer board and thermal pad grounding |
Pinout & Package
Package: 2 mm × 2 mm, 8-pin WSON (DSG) with exposed thermal pad electrically connected to VSS - requires soldering the pad to a dedicated ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Input power supply input | Accepts 3.3–30 V DC; bypassed with ≥1 µF ceramic capacitor to suppress cable-induced transients |
| VSS (Pin 2) | Ground reference and thermal return | Primary ground connection; must be tied to PCB ground plane and thermal pad - not optional |
| NC (Pins 3, 7) | No-connect test pins | Internally used for wafer-level testing; must remain unconnected in final design |
| FAULT (Pin 4) | Open-drain fault status output | Pulled low during OVP/BVOVP/overtemp/startup SC; high-impedance otherwise - requires external pull-up |
| CE (Pin 5) | Active-low enable control | Logic LOW enables pass FET; internally pulled down - can be left floating for always-on operation |
| VBAT (Pin 6) | Battery voltage sense input | Monitors pack voltage via 100-kΩ series resistor to avoid hazardous coupling during failure modes |
| OUT (Pin 8) | Regulated output to charging system | Delivers up to 1.7 A at 5.5 V; bypassed with ≥1 µF ceramic capacitor adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| Input Overvoltage Protection | 6.3-V threshold with 110-mV hysteresis prevents false triggering during line ripple or transient dips |
| Soft-Start Sequence | 8-step ramp (625 µs/step) limits inrush current into downstream capacitive loads - avoids adapter brownout |
| Soft-Stop Shutdown | Gradual gate-drive reduction during fault clears prevents output voltage spikes caused by cable inductance |
| Startup Short-Circuit Detection | 1.5-A current limit enforced only during soft-start - disabled in normal operation to avoid false trips |
| Thermal Shutdown Hysteresis | 20°C gap between 140°C turn-off and 120°C recovery prevents oscillation near thermal limit |
Applications
| Smartphone Charging Front-End | USB-Powered Portable Audio |
|---|---|
|
Use Scenario: AC adapter supplies power to a smartphone's battery charger IC, where faulty adapters may deliver >6 V. IC Role / Device Role: Primary overvoltage guard between adapter and charger IC - isolates downstream circuitry within 200 ns of OVP event. Use Value: Prevents catastrophic damage to charger IC and battery from overvoltage; FAULT signal alerts baseband processor to disable charging path. |
Use Scenario: USB-powered MP3 player draws up to 1.5 A during codec and display operation, with risk of shorted output traces. IC Role / Device Role: Load switch with integrated protection - regulates 5.5-V rail and detects startup shorts before enabling main power stage. Use Value: Eliminates need for discrete OVP + thermal + current-limit ICs; reduces BOM count and PCB area by 40% vs discrete solution. |
| Industrial Handheld Scanner | Medical Patient Monitor Peripheral |
|
Use Scenario: Ruggedized scanner uses wide-input 5–24 V wall adapter; battery pack must never exceed 4.35 V during charging. IC Role / Device Role: Battery voltage supervisor and input protector - monitors VBAT through 100-kΩ resistor to avoid fault propagation. Use Value: Ensures compliance with IEC 62368-1 battery safety requirements; eliminates risk of thermal runaway due to BVOVP failure. |
Use Scenario: Portable monitor connects to hospital-grade power supply; must guarantee zero fault-induced voltage on battery terminals. IC Role / Device Role: Safety-isolated front-end - decouples input source from Li-ion pack using galvanically separated sensing and control paths. Use Value: Meets UL 60601-1 creepage/clearance requirements via 100-kΩ VBAT resistor and internal isolation architecture. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar front-end protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ24390DSGR | Higher 10.5-V input OVP threshold; same 4.35-V BVOVP; identical 8-pin WSON package | Designed for 9–12 V adapter inputs (e.g., PoE-powered devices); unsuitable for 5-V USB-only systems | Select BQ24390DSGR only when input source exceeds 6.5 V and OVP margin must be >10 V |
| TPS259211DRCT | Programmable 2.7–20 V OVP; no battery voltage monitoring; 3.5-A current rating; 10-pin WSON | Lacks BVOVP and thermal shutdown - requires external supervision for Li-ion safety compliance | Choose TPS259211DRCT only for non-battery applications or when adding discrete BVOVP/thermal monitoring |
Compared with BQ24380DSGR, BQ24390DSGR offers higher input OVP headroom but identical battery protection, while TPS259211DRCT provides programmability and higher current but omits critical Li-ion safety functions - making BQ24380DSGR the only single-chip solution meeting full JEITA-compliant charging front-end requirements.
Availability
BQ24380DSGR is available at Aetrix Electronics and suitable for smartphone charging circuits, USB-powered portable audio devices, and industrial handheld scanners requiring stable component supply, long-term lifecycle support, and automotive-grade reliability validation.
Supply support for BQ24380DSGR 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 precision analog ICs and battery management solutions.
The BQ24380DSGR belongs to TI's bq2438x family of front-end protection ICs, engineered specifically for Li-ion battery charging systems in space-constrained portable electronics where input surge, battery overvoltage, and thermal faults must be autonomously managed without host intervention.
FAQ
What is the exact input overvoltage protection threshold for BQ24380DSGR?
The BQ24380DSGR has a nominal input overvoltage protection (OVP) threshold of 6.3 V, with a guaranteed range of 6.1 V to 6.5 V across temperature and process variation. This threshold is fixed and not adjustable - it triggers immediate shutdown of the internal pass FET within 200 ns to isolate the downstream charging circuit from hazardous input voltages.
Does BQ24380DSGR provide battery overvoltage protection, and what is its trip point?
Yes, BQ24380DSGR provides dedicated battery overvoltage protection (BVOVP) with a fixed trip point of 4.35 V, specified as 4.3 V to 4.4 V across –40°C to +125°C. It monitors the battery voltage via the VBAT pin (through a 100-kΩ series resistor) and disables the pass FET using soft-stop if the voltage exceeds this threshold for longer than 176 µs.
Can BQ24380DSGR operate without a microcontroller, and how is it enabled?
Yes, BQ24380DSGR can operate autonomously without a microcontroller. Its CE pin has an internal 200-kΩ pulldown resistor, so leaving CE unconnected or tying it to GND enables the device permanently. FAULT remains high-impedance during normal operation and only pulls low during fault events - no host control is required for basic protection functionality.
What is the maximum continuous output current supported by BQ24380DSGR?
The BQ24380DSGR supports a maximum continuous output current of 1.7 A, verified across the full operating temperature range (–40°C to +125°C) and input voltage range (3.3 V to 30 V). This rating assumes proper PCB thermal design - including soldering the exposed thermal pad to a minimum 100-mm² copper pour - to maintain junction temperature below 125°C.
Is BQ24380DSGR pin-compatible with other devices in the bq2438x family?
Yes, BQ24380DSGR shares identical pinout, package (8-pin WSON), and footprint with BQ24381DSGR and BQ24382DSGR. However, key electrical parameters differ: BQ24380DSGR delivers 5.5-V regulated output and 6.3-V OVP, while BQ24381/2 offer 5.0-V output and higher OVP thresholds (7.1 V and 10.5 V respectively) - direct substitution requires verification of system voltage and protection requirements.
BQ24380DSGR 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)
BQ24380DSGR FAQ
1.How can I place an order for BQ24380DSGR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ24380DSGR 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 BQ24380DSGR reliable?
The price and inventory of BQ24380DSGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ24380DSGR is usually 5 days.
3.What payment methods are accepted for BQ24380DSGR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ24380DSGR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ24380DSGR?
BQ24380DSGR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ24380DSGR 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 BQ24380DSGR?
For technical support, including BQ24380DSGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ24380DSGR requirements.
6.How does Aetrix verify that BQ24380DSGR is sourced from the original manufacturer or authorized distributors?
All BQ24380DSGR 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 BQ24380DSGR meets industry standards.
7.What is the process for return or replacement of BQ24380DSGR?
All BQ24380DSGR units undergo pre-shipment inspection (PSI). If there is an issue with BQ24380DSGR, 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 BQ24380DSGR part is unused and in its original packaging.
Return procedure for BQ24380DSGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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