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Texas Instruments BQ24313DSGT
- Part No.:
- BQ24313DSGT
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
BQ24313DSGT.pdf
- Description:
- IC BATT PROTECTION LI-ION 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:661
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Product details
Overview
BQ24313DSGT from Texas Instruments is a Li-ion battery front-end protection IC with integrated overvoltage, overcurrent, and battery overvoltage protection functions. It delivers 5.85 V regulated output (typical), supports up to 1.5 A input current, responds to input overvoltage in <1 µs, and operates across –40°C to 125°C ambient. It is used in mobile phones and smart phones to safeguard charging circuits from adapter faults.
For engineers reviewing the BQ24313DSGT datasheet, BQ24313DSGT pinout, BQ24313DSGT application, or BQ24313DSGT equivalent, key selection considerations include its 10.5 V input overvoltage threshold, user-programmable OCP via ILIM resistor, open-drain FAULT signaling, thermal shutdown at 140°C, and 2 mm × 2 mm SON package with PowerPAD™ thermal pad.
Technical Context
The BQ24313DSGT implements a linear regulator architecture with internal N-channel pass FET (Q1) between IN and OUT, regulating output to 5.85 V when input is between VO(REG) and OVP threshold. Its protection logic uses independent comparators for input overvoltage (10.5 V), battery overvoltage (4.35 V), and user-set overcurrent, each triggering FAULT assertion and FET turn-off with defined deglitch and recovery timing.
It features active fault management including 15-event counters for OCP and Bat-OVP, soft-stop FET turn-off to suppress voltage spikes, and CE-controlled enable/disable with internal pulldown. The FAULT pin is open-drain and inactive (Hi-Z) during normal operation or when CE is high.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input OVP Threshold | 10.5 V - triggers immediate FET turn-off within 200 ns to protect downstream charger ICs from adapter surges |
| Output Regulation Voltage | 5.85 V (typ) - provides stable LDO-mode supply to charging system when VIN is between 5.85 V and 10.5 V |
| Max Input Voltage | 30 V - withstands transient overvoltages without damage, enabling robust AC adapter interface |
| OCP Programming Range | 300–1500 mA - set by external ILIM-to-VSS resistor (15–90 kΩ), allowing precise current limiting for diverse loads |
| Battery OVP Threshold | 4.35 V - disconnects power if Li-ion cell voltage exceeds safe level, preventing overcharge damage |
| Thermal Shutdown | 140°C - disables FET and asserts FAULT to prevent thermal runaway during sustained overload or poor PCB cooling |
| Package | 2 mm × 2 mm SON-8 with exposed thermal pad - enables compact layout and efficient heat dissipation via PCB ground plane coupling |
Pinout & Package
Package: 2 mm × 2 mm SON-8 with PowerPAD™ thermal pad (internally connected to VSS); requires soldered thermal pad to PCB ground plane for reliable thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Input power supply connection | Accepts 3.3–30 V DC; must be bypassed with ≥1 µF ceramic capacitor to VSS to suppress cable-induced transients |
| VSS (Pin 2) | Ground reference | Primary return path; thermal pad is electrically tied to this pin and must connect to PCB ground plane |
| NC (Pin 3) | No-connect terminal | Internally reserved; no external connection permitted for normal operation |
| FAULT (Pin 4) | Open-drain fault status output | Drives low on OVP/OCP/Bat-OVP/thermal fault; requires external pull-up to host logic rail (e.g., 3.3 V) |
| CE (Pin 5) | Active-low chip enable | Pulled down internally; tie to GND for always-on operation or drive high to disable FET and clear fault counters |
| VBAT (Pin 6) | Battery voltage sense input | Monitors Li-ion pack voltage via external RBAT resistor (100–470 kΩ) to avoid hazardous fault coupling |
| ILIM (Pin 7) | OCP threshold programming | Connect resistor to VSS to set current limit per IOCP = 25 / R(ILIM) (A, R in kΩ) |
| OUT (Pin 8) | Regulated output to charging system | Delivers up to 1.5 A; bypass with ≥1 µF ceramic capacitor to VSS for stability and enhanced OVP response |
Key Features
| Feature | Design Value |
|---|---|
| Rapid input overvoltage response | 200 ns propagation delay ensures sub-microsecond disconnection of faulty adapters before downstream damage occurs |
| User-programmable overcurrent limit | Adjustable 300–1500 mA range via single external resistor enables precise matching to system load requirements |
| Dual-stage OCP recovery | 176 µs blanking time + 64 ms recovery cycle prevents nuisance tripping while ensuring persistent faults are latched |
| Integrated battery overvoltage protection | Fixed 4.35 V threshold with 275 mV hysteresis safeguards Li-ion cells without external components |
| Thermal shutdown with hysteresis | 140°C trip point and 20°C hysteresis prevents oscillation during thermal stress and enables automatic recovery |
Applications
| Mobile Phone Charging Protection | Smartphone Power Path Management |
|---|---|
Use Scenario: AC adapter powers Li-ion battery through charging IC in handheld device with shared USB port. IC Role / Device Role / Timing Role: Front-end protector placed between adapter and charger IC; monitors IN voltage/current and battery voltage in real time. Use Value: Prevents 10.5 V adapter overvoltage from damaging downstream bq24080 or similar charger ICs, eliminating need for discrete TVS or fuse. | Use Scenario: Smartphone supports simultaneous charging and accessory power delivery (e.g., Bluetooth headset) via same USB connector. IC Role / Device Role / Timing Role: Bidirectional power path controller; conducts reverse current (OUT→IN) when accessory is powered, with UVLO-based FET control. Use Value: Enables safe reverse conduction up to 1.5 A without added diode drop or external MOSFET, while maintaining forward OVP/OCP protection. |
| MP3 Player Battery Safety | Bluetooth Headset Input Conditioning |
Use Scenario: Portable audio player uses wall adapter for fast charging; battery pack lacks built-in protection circuitry. IC Role / Device Role / Timing Role: Standalone battery overvoltage monitor; senses VBAT directly to detect >4.35 V condition before cell damage occurs. Use Value: Adds critical 4.35 V battery cutoff without modifying charger IC firmware or adding discrete comparators and MOSFETs. | Use Scenario: Compact Bluetooth headset draws power from host phone's charging port during use. IC Role / Device Role / Timing Role: Input surge suppressor; clamps transient overvoltages from shared data/power lines before they reach sensitive RF/analog sections. Use Value: Withstands 15 kV air-discharge ESD per IEC 61000-4-2, protecting headset PMIC and audio codec from connector-induced transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Li-ion front-end protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ24315DSGT | 5.85 V OVP threshold vs. BQ24313DSGT's 10.5 V; identical pinout, package, and feature set | Suitable for 5 V adapter systems where lower OVP guardband is required; not interchangeable in 9–12 V adapter designs | Select BQ24315DSGT only when input source is strictly ≤6 V and 10.5 V OVP would cause false trips |
| TPS259211DRCR | Programmable OVP (4.5–18 V) and OCP (1–5 A); no battery OVP or thermal shutdown; 2.5 mm × 2.5 mm WSON | General-purpose load switch role; lacks battery-specific protection, requiring external circuitry for Li-ion safety compliance | Choose TPS259211DRCR when system already includes battery monitoring and needs flexible, wide-range input protection only |
Compared with BQ24313DSGT, BQ24315DSGT offers lower OVP for 5 V systems but sacrifices headroom for higher-voltage adapters, while TPS259211DRCR provides broader programmability at the cost of missing integrated battery and thermal safety functions essential for standalone Li-ion protection.
Availability
BQ24313DSGT is available at Aetrix Electronics and suitable for mobile phones, smartphones, and MP3 players requiring stable component supply with full lifecycle support and traceable sourcing.
Supply support for BQ24313DSGT 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 specializing in analog, embedded processing, and power management technologies, with decades of leadership in battery management solutions.
The BQ24313DSGT belongs to TI's battery front-end protection IC product line, designed specifically to replace discrete OVP/OCP circuits in portable Li-ion charging paths while meeting stringent safety and response-time requirements.
FAQ
What is the input overvoltage protection threshold of the BQ24313DSGT?
The BQ24313DSGT has a fixed input overvoltage protection threshold of 10.5 V (typical), with ±300 mV hysteresis. When input voltage exceeds this value, the internal pass FET turns off within 200 ns to isolate the downstream charging circuit. This threshold is factory-trimmed and not adjustable; it is distinct from the BQ24315DSGT's 5.85 V OVP setting.
How is overcurrent protection configured on the BQ24313DSGT?
Overcurrent protection on the BQ24313DSGT is configured using an external resistor connected between the ILIM pin and VSS. The threshold current follows IOCP = 25 / R(ILIM) (A, R in kΩ), supporting 300–1500 mA range. For example, a 25 kΩ resistor sets 1 A limit. The IC applies 176 µs blanking time before asserting FAULT if overcurrent persists.
Does the BQ24313DSGT provide battery overvoltage protection, and how does it behave?
Yes, the BQ24313DSGT provides integrated battery overvoltage protection with a fixed 4.35 V threshold and 275 mV hysteresis. When VBAT exceeds 4.35 V, the FET turns off gradually ("soft-stop") and FAULT goes low. Recovery occurs only after VBAT falls below 4.075 V. An internal counter increments per event; 15 consecutive faults disable the FET permanently until power cycle or CE toggle.
What is the role of the FAULT pin on the BQ24313DSGT, and how should it be interfaced?
FAULT is an open-drain, active-low output that signals OVP, OCP, battery OVP, or thermal shutdown. It remains high-impedance during normal operation or when CE is high. To interface, connect an external pull-up resistor (e.g., 47 kΩ to 3.3 V) and route to a host GPIO. If monitoring is unused, FAULT may be left floating, but TI recommends pull-up for noise immunity.
Can the BQ24313DSGT support reverse current flow from OUT to IN, and under what conditions?
Yes, the BQ24313DSGT supports reverse conduction when VOUT > UVLO + 0.7 V (≈3.4 V), enabling accessory power delivery. In this mode, the internal FET conducts bidirectionally up to 1.5 A, but no overcurrent protection applies in reverse direction. Reverse operation requires CE = low and relies on UVLO hysteresis for turn-on/turn-off control; no additional components are needed.
BQ24313DSGT 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
- Interface:
- -
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-WSON (2x2)
BQ24313DSGT FAQ
1.How can I place an order for BQ24313DSGT through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ24313DSGT 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 BQ24313DSGT reliable?
The price and inventory of BQ24313DSGT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ24313DSGT is usually 5 days.
3.What payment methods are accepted for BQ24313DSGT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ24313DSGT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ24313DSGT?
BQ24313DSGT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ24313DSGT 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 BQ24313DSGT?
For technical support, including BQ24313DSGT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ24313DSGT requirements.
6.How does Aetrix verify that BQ24313DSGT is sourced from the original manufacturer or authorized distributors?
All BQ24313DSGT 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 BQ24313DSGT meets industry standards.
7.What is the process for return or replacement of BQ24313DSGT?
All BQ24313DSGT units undergo pre-shipment inspection (PSI). If there is an issue with BQ24313DSGT, 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 BQ24313DSGT part is unused and in its original packaging.
Return procedure for BQ24313DSGT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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