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Texas Instruments TPS259631DDAR
- Part No.:
- TPS259631DDAR
- Manufacturer:
- Texas Instruments
- Category:
- Current Regulation/Management
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS259631DDAR.pdf
- Description:
- IC ELECT FUSE 10.4% 8SO PWRPAD
- Quantity:
- Payment:
- Shipping:
Inventory:11,506
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Product details
Overview
TPS259631DDAR from Texas Instruments is a 2.7–19 V, 0.125–2-A eFuse IC with 89-mΩ on-resistance, adjustable overvoltage lockout (OVLO), auto-retry thermal shutdown, and accurate current monitoring via ILM pin. It protects downstream circuits in energy meters, IP network cameras, and UL 60335-1–compliant appliance power supplies.
For engineers reviewing the TPS259631DDAR datasheet, TPS259631DDAR pinout, TPS259631DDAR application, or TPS259631DDAR equivalent, key selection considerations include its SOIC-8 package with exposed thermal pad, 1.3-μs OVLO response time, ±5.5% current limit accuracy at 1 A, and auto-retry behavior during thermal fault events.
Technical Context
The TPS259631DDAR implements an integrated N-channel MOSFET with gate charge pump control, enabling precise current limiting via external RILM and user-defined OVLO threshold via resistor divider on the OVLO pin. Its functional block includes independent UVLO/EN, dVdt slew-rate control, FLT open-drain fault reporting, and internal thermal sensing with auto-retry latch timing.
Unlike TPS25962x variants that use pin-selectable OVC clamp, the TPS259631DDAR exclusively supports adjustable OVLO with 1.2 V reference and 95 mV hysteresis. Its 1.3-μs overvoltage response and 87-μs current-limit reaction enable fast protection against transients while maintaining stable operation across –40°C to +125°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7 V to 19 V - supports wide industrial and appliance input rails; absolute max 21 V. |
| Current Limit Range | 0.125 A to 2 A - set by single external RILM resistor; ±5.5% accuracy at 1 A. |
| On-Resistance | 89 mΩ (typical at VIN > 4 V, TJ = 25°C) - enables low conduction loss and minimal thermal rise. |
| OVLO Response Time | 1.3 μs (typical) - ensures rapid disconnection before downstream components sustain overvoltage stress. |
| Thermal Shutdown | 157°C rising threshold with 11.5°C hysteresis and auto-retry - recovers after cooling without manual reset. |
| Quiescent Current | 259 μA (typical) - minimizes standby power draw in always-on systems like smart meters. |
| Package | SOIC-8 with exposed thermal pad - 4.91 mm × 3.9 mm footprint; requires PCB ground plane connection for thermal performance. |
Pinout & Package
TPS259631DDAR uses an 8-pin SOIC package (DDA) with exposed thermal pad soldered to system ground for thermal dissipation. Pin functions are validated per TI SLVSET8A datasheet Rev. August 2019.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Primary return path for all analog and power circuits; must connect to low-impedance system ground. |
| dVdt (Pin 2) | Slew rate control | Capacitor-to-GND sets output voltage ramp rate; open for fastest turn-on. |
| EN/UVLO (Pin 3) | Enable & undervoltage monitor | Active-high enable; resistor divider adjusts UVLO threshold (1.2 V ref); not floating. |
| IN (Pin 4) | Main power input | Accepts 2.7–19 V supply; handles up to 21 V absolute max. |
| OUT (Pin 5) | Protected power output | Delivers current-limited, OVLO-protected power to load; connects to COUT and ROUT. |
| FLT (Pin 6) | Fault indicator | Open-drain active-low signal; asserts during overcurrent, OVLO, or thermal fault; requires external pull-up. |
| ILM (Pin 7) | Current limit & monitor | Resistor-to-GND sets current limit; voltage at pin provides 656 µA/A proportional current sense. |
| OVLO (Pin 8) | Overvoltage lockout input | Resistor divider from IN sets OVLO threshold (1.2 V ref); not floating; defines cutoff voltage. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable OVLO | User-configurable input overvoltage cutoff via resistor divider on OVLO pin; avoids fixed-threshold limitations. |
| Auto-retry thermal shutdown | Self-recovering after overheating (157°C trip); eliminates need for manual reset in sealed enclosures. |
| Accurate current monitoring | ILM pin delivers 656 µA/A output with ±5.5% error at 1 A - enables real-time load diagnostics without shunt resistor. |
| IEC 61000-4-4 EFT immunity | Robust against 4 kV electrical fast transients - suitable for noisy industrial environments. |
| Programmable dV/dt control | Single capacitor on dVdt pin limits inrush current - prevents tripping during hot-swap or capacitive load startup. |
Applications
| Energy Meters | IP Network Cameras |
|---|---|
Use Scenario: Protection of metrology ICs and communication interfaces against input surges and reverse polarity during field installation. IC Role / Device Role / Timing Role: Primary power switch and fault supervisor between AC-DC adapter and isolated DC-DC stage. Use Value: Prevents damage from 19-V input transients while providing accurate 1-A current monitoring for tamper detection. | Use Scenario: Power management for PoE-powered cameras with variable load profiles and strict thermal constraints. IC Role / Device Role / Timing Role: Hot-swap controller that enforces current limit during 802.3af/at negotiation and clamps faults within 1.3 μs. Use Value: Enables reliable auto-retry after thermal overload without interrupting video streaming or firmware updates. |
| Refrigerator Control Boards | Washing Machine Motor Drives |
Use Scenario: Protecting microcontroller and sensor rails in UL 60335-1 Class II appliances subject to line surges and condensation-induced leakage. IC Role / Device Role / Timing Role: Secondary-side eFuse isolating 5-V/3.3-V logic rails from main 12-V supply. Use Value: Meets IEC 62368 CB certification requirements with integrated OVLO and 11.5°C thermal hysteresis. | Use Scenario: Safeguarding motor driver gate drivers and MCU peripherals during high-current spin cycles and pump activation. IC Role / Device Role / Timing Role: Current-limited power switch upstream of H-bridge drivers with ILM-based load profiling. Use Value: Delivers 2-A continuous current with ±10.4% limit accuracy across temperature, enabling predictive maintenance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar eFuse applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS259630DDAR | Latch-off thermal shutdown instead of auto-retry; identical OVLO, current limit, and pinout. | Requires external reset after thermal fault; unsuitable for unattended recovery scenarios. | Select when safety-critical systems mandate manual intervention after overtemperature event. |
| TPS259421RTER | 4-V to 60-V input range; 3.5-A limit; 28-mΩ RON; QFN-16 package; no OVLO - only OVP clamp. | Higher voltage/current capability but lacks adjustable OVLO; requires different layout and biasing. | Select for 24-V industrial systems needing higher power density and faster 350-ns OVP response. |
Compared with TPS259630DDAR, the TPS259631DDAR enables autonomous recovery after thermal faults, while TPS259421RTER trades OVLO configurability for wider voltage range and lower RON - making it better suited for 48-V motor control but incompatible for UL 60335-1 appliance OVLO compliance.
Availability
TPS259631DDAR is available at Aetrix Electronics and suitable for energy metering, IP network camera power design, and UL 60335-1–certified appliance control boards requiring stable component supply and long-term manufacturability.
Supply support for TPS259631DDAR 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer applications.
The TPS2596xx family is designed as highly integrated eFuses for robust circuit protection in space-constrained, safety-certifiable systems - emphasizing accurate current monitoring, fast overvoltage response, and thermal resilience.
FAQ
What is the overvoltage protection mechanism used in the TPS259631DDAR?
The TPS259631DDAR implements adjustable overvoltage lockout (OVLO), not clamping. A resistor divider from IN to the OVLO pin sets the trip threshold relative to a 1.2-V internal reference. When the divided voltage exceeds 1.2 V (rising), the FET turns off within 1.3 μs. This differs from TPS25962x variants, which use pin-selectable output clamping.
How does the TPS259631DDAR achieve auto-retry thermal shutdown?
The TPS259631DDAR integrates a thermal sensor with 157°C rising threshold and 11.5°C hysteresis. Upon trip, it enters auto-retry mode with a 95-ms internal timer. After cooling below 145.5°C, it automatically re-enables the FET without external intervention - confirmed in the Device Comparison Table and Figure 35 of the datasheet.
Can the TPS259631DDAR be used without an external RILM resistor?
No. The TPS259631DDAR requires an external resistor from ILM pin to GND to set the current limit. With RILM open, the current limit defaults to 0 A (FET remains off). Valid RILM values range from 453 Ω (2-A limit) to 7.87 kΩ (0.125-A limit), per Electrical Characteristics Table 7.5.
What is the purpose of the dVdt pin on the TPS259631DDAR?
The dVdt pin controls output voltage slew rate during turn-on. Connecting a capacitor from dVdt to GND slows the OUT ramp, reducing inrush current into large capacitive loads. With no capacitor, the device achieves maximum slew rate (e.g., 75.1 V/ms at 12 V), as specified in Switching Characteristics Table 7.7.
Is the TPS259631DDAR compliant with UL 2367 and IEC 62368 standards?
Per the datasheet Feature list, UL 2367 recognition and IEC 62368 CB certification are pending for the TPS259631DDAR. It meets IEC 61000-4-4 EFT immunity (±2 kV contact, ±4 kV air), and its thermal shutdown, OVLO, and current limiting support compliance pathways for end-equipment standards including UL 60335-1.
TPS259631DDAR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Electronic Fuse
- Sensing Method:
- -
- Accuracy:
- ±10.4%
- Voltage - Input:
- 2.7V ~ 19V
- Current - Output:
- 2A
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO PowerPad
TPS259631DDAR FAQ
1.How can I place an order for TPS259631DDAR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS259631DDAR 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 TPS259631DDAR reliable?
The price and inventory of TPS259631DDAR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS259631DDAR is usually 5 days.
3.What payment methods are accepted for TPS259631DDAR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS259631DDAR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS259631DDAR?
TPS259631DDAR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS259631DDAR 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 TPS259631DDAR?
For technical support, including TPS259631DDAR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS259631DDAR requirements.
6.How does Aetrix verify that TPS259631DDAR is sourced from the original manufacturer or authorized distributors?
All TPS259631DDAR 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 TPS259631DDAR meets industry standards.
7.What is the process for return or replacement of TPS259631DDAR?
All TPS259631DDAR units undergo pre-shipment inspection (PSI). If there is an issue with TPS259631DDAR, 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 TPS259631DDAR part is unused and in its original packaging.
Return procedure for TPS259631DDAR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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