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Texas Instruments BQ24316DSGTG4
- Part No.:
- BQ24316DSGTG4
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
BQ24316DSGTG4.pdf
- Description:
- IC BATT PROTECTION LI-ION 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:3,714
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Product details
Overview
BQ24316DSGTG4 from Texas Instruments is a Li-ion battery front-end protection IC that provides integrated input overvoltage (6.8 V threshold), user-programmable input overcurrent (930–1070 mA at 25 kΩ), and battery overvoltage (4.35 V) protection in a single 8-pin 2 × 2 mm WSON package. It operates across 3.3–26 V input, supports up to 1.5 A continuous current, and delivers rapid <1 μs OVP response for mobile phone and smart device charging circuits.
For engineers reviewing the BQ24316DSGTG4 datasheet, BQ24316DSGTG4 pinout, BQ24316DSGTG4 application, or BQ24316DSGTG4 equivalent, key selection considerations include its programmable OCP via ILIM resistor, open-drain FAULT signaling, thermal shutdown at 140 °C, CE-controlled enable/disable, and compatibility with AC adapter-based Li-ion charging systems requiring robust fault isolation.
Technical Context
The BQ24316DSGTG4 implements a high-speed analog comparator-based OVP path with sub-microsecond propagation delay, coupled with a current-sense amplifier and programmable hysteresis for stable overcurrent detection. Its internal P-FET switch (Q1) is controlled by independent protection logic blocks-OVP, OCP, BOVP, and thermal shutdown-each capable of forcing FAULT low and disabling the pass element.
Operation includes deglitch timing (8 ms power-on, 176 μs BOVP, 64 ms OCP recovery), blanking periods (176 μs OCP), and counter-based latching (15 faults per charge cycle). The device features soft-start and soft-stop behavior to suppress input ringing and inductive voltage spikes during switching transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input OVP Threshold | 6.6–7.0 V (bq24316-specific; enables safe cutoff before adapter surge damages downstream charger) |
| Input OCP Range | 300–1500 mA (user-set via ILIM resistor; 930–1070 mA typical at 25 kΩ) |
| Battery OVP | 4.30–4.40 V (fixed internal threshold; prevents Li-ion cell overcharge and gas generation) |
| OVP Response Time | <1 μs (ensures immediate disconnection during fast-rising adapter transients) |
| Operating Input Range | 3.3–26 V (supports USB PD, 5 V/9 V/12 V adapters, and legacy wall adapters) |
| Max Continuous Current | 1.5 A (determines compatible battery capacity and charge rate for handheld devices) |
| Junction Temp Limit | 140–150 °C (thermal shutdown protects silicon integrity under sustained overload or poor PCB cooling) |
Pinout & Package
Package: 8-pin WSON (DSG), 2.00 mm × 2.00 mm, exposed thermal pad connected internally to VSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pins 1,2) | Input power supply node | Accepts DC adapter input; requires ≥1 μF ceramic bypass capacitor to ground for transient suppression |
| VSS (Pin 2) | Ground reference | Primary system ground; thermal pad must be soldered to same net for thermal dissipation |
| OUT (Pin 8) | Protected output to charging circuit | Delivers regulated input to downstream charger IC; isolated during all fault conditions |
| FAULT (Pin 4) | Open-drain fault indicator | Drives low on OVP/OCP/BOVP/thermal fault; requires external pull-up for host MCU monitoring |
| CE (Pin 5) | Chip enable control | Active-low; disables protection and resets internal counters when pulled high |
| ILIM (Pin 7) | OCP programming interface | Connects to VSS via resistor (15–90 kΩ) to set precise current limit threshold |
| VBAT (Pin 6) | Battery voltage sense input | Monitors pack voltage through external 100–470 kΩ resistor for safety-critical BOVP detection |
Key Features
| Feature | Design Value |
|---|---|
| Rapid input overvoltage cutoff | <1 μs response isolates downstream charger before transient energy propagates |
| User-programmable overcurrent limit | Resistor-based setting (15–90 kΩ) enables precise adaptation to system current requirements |
| Triple-fault protection coverage | Simultaneous monitoring of input voltage, input current, and battery voltage ensures full front-end safety |
| Thermal shutdown with hysteresis | 140 °C trip + 20 °C hysteresis prevents oscillation and enables safe cooldown before recovery |
| Counter-based fault latching | 15 consecutive faults disable FET permanently until power cycle or CE toggle, preventing repeated stress |
Applications
| Smartphone Charging Protection | Bluetooth Headset Power Management |
|---|---|
|
Use Scenario: AC adapter powers smartphone during Li-ion charging; adapter may fail with overvoltage or deliver excessive current due to cable damage or regulator fault. IC Role / Device Role / Timing Role: Front-end protector placed between adapter and main charger IC (e.g., bq24080); monitors IN, OUT, and VBAT in real time with sub-μs OVP reaction. Use Value: Prevents catastrophic failure of downstream charger and battery by disconnecting within 1 μs on 6.8 V OVP, avoiding thermal runaway or electrolyte venting. |
Use Scenario: Compact Bluetooth headset uses micro-USB input; low-power design demands minimal quiescent current and space-constrained layout. IC Role / Device Role / Timing Role: Standalone protection layer enabling safe use of unregulated or third-party adapters; CE pin allows host MCU to enable/disable based on battery state. Use Value: 400 μA operating current and 2 × 2 mm WSON footprint meet size/power constraints while delivering full OVP/OCP/BOVP coverage without external components. |
| MP3 Player Adapter Interface | PDA System-Level Safety |
|
Use Scenario: Portable MP3 player accepts multiple adapter types; inconsistent quality increases risk of overvoltage events damaging audio codec or flash memory. IC Role / Device Role / Timing Role: Input guard IC placed at board edge; FAULT pin signals host processor to halt charging and display warning on OVP/OCP event. Use Value: Open-drain FAULT output with 15-fault latch prevents repeated cycling during persistent adapter fault, improving user experience and field reliability. |
Use Scenario: Industrial PDA used in logistics environments experiences wide temperature swings and mechanical shock; battery pack must remain protected under all conditions. IC Role / Device Role / Timing Role: Primary safety element in charging path; thermal shutdown (140 °C) and BOVP (4.35 V) operate independently of host firmware. Use Value: Hardware-enforced protection ensures safety even if host MCU freezes or fails, meeting IEC 62368-1 functional safety expectations for portable equipment. |
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 |
|---|---|---|---|
| BQ24314DSGT | OVP threshold fixed at 5.71–6.0 V (lower than BQ24316DSGTG4's 6.6–7.0 V); identical pinout, package, and feature set otherwise | Suitable for 5 V-only adapter systems where higher OVP margin is unnecessary | Select BQ24314DSGT only when adapter nominal voltage is strictly ≤5.5 V and 6.8 V OVP headroom is not required |
| TPS259211DRCR | Single-channel eFuse with adjustable OVP (4.5–18 V), OCP (0.5–5.3 A), and no BOVP or VBAT sensing capability | Lacks battery-side monitoring; requires external circuitry for Li-ion overvoltage protection | Choose TPS259211DRCR only when BOVP is handled elsewhere (e.g., battery pack BMS) and higher current rating is needed |
Compared with BQ24314DSGT, BQ24316DSGTG4 provides higher OVP headroom for 9 V/12 V adapters; compared with TPS259211DRCR, it integrates battery voltage monitoring and latched fault handling-critical for standalone Li-ion safety without host intervention.
Availability
BQ24316DSGTG4 is available at Aetrix Electronics and suitable for smartphone charging protection, Bluetooth headset power management, and MP3 player adapter interface applications requiring stable component supply and long-term industrial availability.
Supply support for BQ24316DSGTG4 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 and embedded processing technologies, with leadership in power management, signal chain, and battery solutions.
The BQ24316DSGTG4 belongs to TI's battery front-end protection IC product line, designed specifically to safeguard Li-ion charging systems against adapter faults, overcurrent, and battery overvoltage in space-constrained portable electronics.
FAQ
What is the exact input overvoltage protection threshold for BQ24316DSGTG4?
The BQ24316DSGTG4 has a specified input overvoltage protection (OVP) threshold of 6.6 V (minimum), 6.8 V (typical), and 7.0 V (maximum) at 25°C. This value is factory-trimmed and differs from the bq24314 variant (5.71–6.0 V), making BQ24316DSGTG4 suitable for systems using 9 V or 12 V adapters where higher OVP margin is required to avoid nuisance tripping.
How is the input overcurrent limit programmed on BQ24316DSGTG4?
The input overcurrent limit on BQ24316DSGTG4 is set by connecting an external resistor (RILIM) between the ILIM pin and VSS. With RILIM = 25 kΩ, the typical OCP threshold is 1000 mA. The relationship follows IOCP ≈ 25 ÷ RILIM (with current in A and resistance in kΩ), supporting a programmable range of 300–1500 mA using 15–90 kΩ resistors.
Does BQ24316DSGTG4 provide battery overvoltage protection, and how is it implemented?
Yes, BQ24316DSGTG4 provides dedicated battery overvoltage protection (BOVP) with a fixed internal threshold of 4.30–4.40 V. It senses battery voltage via the VBAT pin, which must be connected through an external 100–470 kΩ resistor for safety isolation. When VBAT exceeds BVOVP, the internal FET is turned off within 176 μs, and FAULT is driven low-preventing Li-ion cell overcharge and ensuring compliance with cell manufacturer specifications.
What is the role of the CE pin on BQ24316DSGTG4, and what happens when it is left floating?
The CE pin on BQ24316DSGTG4 is an active-low chip enable input with an internal pulldown resistor. When left floating, CE defaults to low, enabling normal operation. Driving CE high disables the internal FET, forces FAULT into high-impedance state, and resets both OCP and BOVP fault counters-allowing host MCU to reinitialize protection after fault clearance without power cycling.
Can BQ24316DSGTG4 be used without connecting the VBAT pin?
No-VBAT must be connected for full protection functionality. If battery overvoltage protection is not required, the VBAT pin must be tied directly to VSS (ground) per datasheet guidance. Leaving VBAT unconnected risks undefined behavior and disables BOVP, compromising critical Li-ion safety. For safe operation, always connect VBAT through a 100–470 kΩ resistor to the battery positive terminal or to VSS if BOVP is intentionally disabled.
BQ24316DSGTG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Function:
- Battery Protection
- Battery Chemistry:
- Lithium Ion
- Number of Cells:
- -
- Fault Protection:
- Over Current, Over Temperature, Over/Under Voltage
- Interface:
- -
- Operating Temperature:
- 0°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-WSON (2x2)
BQ24316DSGTG4 FAQ
1.How can I place an order for BQ24316DSGTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ24316DSGTG4 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 BQ24316DSGTG4 reliable?
The price and inventory of BQ24316DSGTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ24316DSGTG4 is usually 5 days.
3.What payment methods are accepted for BQ24316DSGTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ24316DSGTG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ24316DSGTG4?
BQ24316DSGTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ24316DSGTG4 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 BQ24316DSGTG4?
For technical support, including BQ24316DSGTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ24316DSGTG4 requirements.
6.How does Aetrix verify that BQ24316DSGTG4 is sourced from the original manufacturer or authorized distributors?
All BQ24316DSGTG4 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 BQ24316DSGTG4 meets industry standards.
7.What is the process for return or replacement of BQ24316DSGTG4?
All BQ24316DSGTG4 units undergo pre-shipment inspection (PSI). If there is an issue with BQ24316DSGTG4, 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 BQ24316DSGTG4 part is unused and in its original packaging.
Return procedure for BQ24316DSGTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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