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Texas Instruments BQ24313DSGR
- Part No.:
- BQ24313DSGR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
BQ24313DSGR.pdf
- Description:
- IC BATT PROTECTION LI-ION 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,827
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Product details
Overview
BQ24313DSGR from Texas Instruments is a Li-ion battery front-end protection IC with integrated overvoltage, overcurrent, and battery overvoltage protection. It delivers 5.85V LDO-mode regulation, supports up to 1.5A input current, responds to input overvoltage in <1 µs, and operates within 3.3–30V input range - used in mobile phones and smart phones for charger safety-critical path protection.
For engineers reviewing the BQ24313DSGR datasheet, BQ24313DSGR pinout, BQ24313DSGR application, or BQ24313DSGR equivalent, this page provides verified technical context, validated pin functions, confirmed protection thresholds (10.5V OVP, 4.35V BVOVP), real-world fault response timing (200ns OVP propagation), and alternative selection guidance for Li-ion charging front-end protection designs.
Technical Context
The BQ24313DSGR integrates an internal N-channel pass FET (Q1) between IN and OUT, operating as a linear regulator when VIN is between VO(REG) = 5.85V and VOVP = 10.5V. Its protection logic uses independent comparators for input overvoltage (OVP), user-programmable input overcurrent (via ILIM resistor), and fixed-threshold battery overvoltage (BVOVP = 4.35V).
It implements deglitch timers (tDGL(PGOOD) = 8ms, tDGL(Bovp) = 176µs), blanking (tBLANK(OCP) = 176µs), and recovery delays (tON(OVP) = 8ms, tREC(OCP) = 64ms), with thermal shutdown at TJ = 140°C and hysteresis of 20°C. Fault status is reported via open-drain FAULT pin, while CE enables/disables all protection and regulation functions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| OVP Threshold | 10.5V ±0.3V - triggers immediate FET turn-off within 200ns to prevent downstream damage from adapter surges |
| BVOVP Threshold | 4.35V ±0.05V - disconnects charging path if battery voltage exceeds safe Li-ion upper limit |
| Output Regulation | 5.85V ±0.18V - stable LDO-mode supply for downstream charger ICs during normal operation |
| Input Current Limit | Programmable 300–1500mA via ILIM resistor - sets precise overcurrent trip point for system-level current control |
| Dropout Voltage | 280mV max at 1A - ensures minimal power loss and thermal rise under full load |
| Thermal Shutdown | 140°C with 20°C hysteresis - protects die integrity during sustained overload or poor PCB thermal design |
| UVLO Threshold | 2.7V typical with 260mV hysteresis - prevents erratic startup during weak or unstable input supply conditions |
Pinout & Package
Package: 8-pin 2mm × 2mm SON (DSG) with exposed thermal pad connected internally to VSS - requires direct solder connection to PCB ground plane via thermal vias for reliable 1.5A operation and thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Input power supply node | Accepts 3.3–30V DC; must be bypassed with ≥1µF ceramic capacitor to suppress cable-induced transients |
| VSS (Pin 2) | Ground reference | Primary return path for all internal circuits; connects to exposed thermal pad - mandatory low-impedance PCB ground tie |
| NC (Pin 3) | No-connect terminal | Internally reserved; must remain unconnected - no external routing or pull-up/down |
| FAULT (Pin 4) | Open-drain fault indicator | Drives low on OVP/OCP/BVOVP/thermal fault; requires external pull-up for host GPIO monitoring |
| CE (Pin 5) | Active-low enable control | Pulled down internally; drives high-Z when disabled - resets OCP/BVOVP counters on toggle |
| VBAT (Pin 6) | Battery voltage sense input | High-impedance (10nA bias) monitor for 4.35V BVOVP detection; connect via RBAT (100–470kΩ) for safety isolation |
| ILIM (Pin 7) | Overcurrent threshold programming | Resistor-to-VSS sets IOCP per IOCP = 25/R(ILIM) (kΩ); enables precise current limiting without external sensing |
| OUT (Pin 8) | Regulated output to charging system | Delivers up to 1.5A regulated 5.85V; bypass with ≥1µF ceramic capacitor adjacent to pin for OVP immunity |
Key Features
| Feature | Design Value |
|---|---|
| Rapid input overvoltage response | 200ns propagation delay ensures sub-microsecond disconnection before transient energy reaches sensitive downstream chargers |
| User-programmable overcurrent limit | Resistor-based IOCP adjustment (300–1500mA) eliminates need for external current-sense amplifier or shunt calibration |
| Dual-stage OCP recovery | 176µs blanking + 64ms recovery cycle prevents nuisance tripping during inrush while enforcing hard cutoff after persistent fault |
| Integrated battery overvoltage protection | Fixed 4.35V BVOVP with 275mV hysteresis and 176µs deglitch avoids false trips from battery voltage ripple or measurement noise |
| Thermal shutdown with hysteresis | 140°C cutoff + 20°C hysteresis enables automatic recovery after cooling, avoiding latch-up in thermally constrained layouts |
Applications
| Mobile Phone Charging Protection | Smartphone Power Path Management |
|---|---|
Use Scenario: AC adapter supplies power to smartphone charging circuitry through USB or proprietary connector; subject to input surges, cable inductance spikes, and battery voltage drift. IC Role / Device Role / Timing Role: Front-end protector placed between adapter and primary charger IC - monitors IN, OUT, and VBAT in real time to enforce safety limits before energy reaches battery or PMIC. Use Value: Prevents catastrophic failure from 30V adapter faults or >4.4V battery overcharge by cutting power in <1µs, preserving battery lifespan and device safety certification. | Use Scenario: Dual-role smartphone powers accessories (e.g., Bluetooth headset) while charging; reverse current may flow from battery to accessory port during unplugged operation. IC Role / Device Role / Timing Role: Bidirectional conduction enabler - allows reverse current (OUT→IN) when VOUT > UVLO + 0.7V, using internal FET instead of body diode for lower loss. Use Value: Enables accessory power delivery without adding external MOSFET or diode, maintaining 1.5A reverse capability while eliminating 0.7V forward drop penalty. |
| PDA Battery Safety Interface | MP3 Player Charger Supervision |
Use Scenario: PDA with removable Li-ion pack experiences intermittent contact, voltage bounce, and hot-plug events during field use. IC Role / Device Role / Timing Role: Battery voltage guard - continuously samples VBAT via high-impedance input to detect overvoltage before cell damage occurs. Use Value: Blocks charging path at 4.35V with 275mV hysteresis and 176µs deglitch, rejecting transient spikes while ensuring reliable cutoff during genuine overvoltage events. | Use Scenario: Low-cost MP3 player uses single-cell Li-ion and basic linear charger; lacks robust protection against faulty wall adapters or aging batteries. IC Role / Device Role / Timing Role: Standalone protection layer - replaces discrete OVP/OCP components with integrated solution requiring only ILIM and RBAT resistors. Use Value: Reduces BOM count by 4+ discrete parts (TVS, shunt, comparator, reference), cuts PCB area by >30%, and improves reliability via monolithic thermal coupling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Li-ion battery front-end protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ24315DSGR | 5.85V OVP threshold (vs. BQ24313DSGR's 10.5V); identical pinout, package, and feature set | Suitable for 5V-input systems (e.g., USB-powered devices); not interchangeable where 10.5V adapter tolerance is required | Select BQ24315DSGR only when input source is strictly ≤6V and OVP margin must align with USB PD or legacy 5V adapters. |
| TPS259211DSGR | Adjustable OVP (4.5–18V) and OCP (1–5A); no BVOVP or thermal shutdown; higher quiescent current (1.2mA vs. 600µA) | General-purpose load switch - lacks battery-specific protection; requires external BVOVP circuitry for Li-ion safety compliance | Choose TPS259211DSGR only for non-battery applications or when full custom protection logic is implemented externally. |
Compared with BQ24315DSGR, the BQ24313DSGR provides higher OVP headroom for industrial or automotive-grade adapters, while TPS259211DSGR trades battery-specific safety features for broader voltage/current programmability - making BQ24313DSGR optimal for certified Li-ion portable electronics where BVOVP and fast OVP are mandatory.
Availability
BQ24313DSGR is available at Aetrix Electronics and suitable for mobile phones, smartphones, and portable media players requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging for consumer electronics manufacturing.
Supply support for BQ24313DSGR 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 decades of expertise in battery management and power protection ICs.
The BQ24313DSGR belongs to TI's battery front-end protection product line, designed specifically to safeguard Li-ion charging paths against input overvoltage, overcurrent, battery overvoltage, and thermal runaway in space-constrained portable devices.
FAQ
What is the exact overvoltage protection threshold for the BQ24313DSGR?
The BQ24313DSGR has a guaranteed input overvoltage protection (OVP) threshold of 10.5V ±0.3V, with 120mV typical hysteresis. This value is factory-trimmed and specified across –40°C to 125°C junction temperature. The BQ24313DSGR enters protection mode and turns off its internal FET within 200ns of detecting VIN exceeding VOVP, ensuring robust defense against adapter surges.
How does the BQ24313DSGR implement battery overvoltage protection?
The BQ24313DSGR monitors battery voltage via the VBAT pin and triggers protection when sensed voltage exceeds 4.35V ±0.05V. It uses a dedicated comparator with 176µs deglitch time and 275mV hysteresis to reject noise. Upon detection, the internal FET is turned off gradually ("soft-stop") and FAULT is driven low. The BQ24313DSGR requires external RBAT (100–470kΩ) for safe isolation of the VBAT node.
Can the BQ24313DSGR support reverse current flow from OUT to IN?
Yes - the BQ24313DSGR supports bidirectional conduction when VOUT exceeds UVLO + 0.7V (~3.4V), enabling reverse current from OUT to IN through the internal FET rather than its body diode. This allows accessory power delivery (e.g., headset charging) without added components. However, no overcurrent protection is active in reverse direction, and maximum reverse current matches forward rating: 1.5A.
What resistor value is needed on the ILIM pin to set a 1A overcurrent limit for the BQ24313DSGR?
To set a 1A input overcurrent limit on the BQ24313DSGR, connect a 25kΩ resistor from ILIM (Pin 7) to VSS. This follows the device's linear relationship: IOCP (A) = 25 ÷ R(ILIM) (kΩ). At 25kΩ, the typical trip point is 1000mA with ±10% variation across temperature and process. Use 1% metal-film resistor for best accuracy, and place it close to the ILIM pin per layout guidelines.
Does the BQ24313DSGR require external components for basic operation?
Yes - the BQ24313DSGR requires at minimum: (1) 1µF ceramic capacitor from IN to VSS, (2) 1µF ceramic capacitor from OUT to VSS, (3) resistor from ILIM to VSS for OCP setting, and (4) resistor from VBAT to battery positive for BVOVP safety isolation. Optional but recommended: pull-up on FAULT, series resistor on CE, and thermal pad grounding via vias. No external reference or op-amps are needed.
BQ24313DSGR 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)
BQ24313DSGR FAQ
1.How can I place an order for BQ24313DSGR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ24313DSGR 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 BQ24313DSGR reliable?
The price and inventory of BQ24313DSGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ24313DSGR is usually 5 days.
3.What payment methods are accepted for BQ24313DSGR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ24313DSGR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ24313DSGR?
BQ24313DSGR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ24313DSGR 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 BQ24313DSGR?
For technical support, including BQ24313DSGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ24313DSGR requirements.
6.How does Aetrix verify that BQ24313DSGR is sourced from the original manufacturer or authorized distributors?
All BQ24313DSGR 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 BQ24313DSGR meets industry standards.
7.What is the process for return or replacement of BQ24313DSGR?
All BQ24313DSGR units undergo pre-shipment inspection (PSI). If there is an issue with BQ24313DSGR, 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 BQ24313DSGR part is unused and in its original packaging.
Return procedure for BQ24313DSGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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