Texas Instruments TPS259621DDAR

Overview

TPS259621DDAR from Texas Instruments is a 2.7–19 V, 0.125–2-A eFuse IC with 89-mΩ on-resistance, fast 5-μs overvoltage clamp (3.8 V / 5.7 V / 13.8 V pin-selectable), auto-retry thermal shutdown, and accurate ±5.5% current monitoring at 1 A. It protects power rails in energy meters and UL 60335-1-compliant appliance LPCs.

For engineers reviewing the TPS259621DDAR datasheet, TPS259621DDAR pinout, TPS259621DDAR application, or TPS259621DDAR equivalent, key selection criteria include its SOIC-8 package with exposed thermal pad, adjustable dV/dt slew rate control via external capacitor, dual-function ILM pin for current limit setting and real-time load current monitoring, and pin-selectable OVCSEL thresholds enabling fixed-voltage clamping without external components.

Technical Context

The TPS259621DDAR implements an integrated N-channel MOSFET with active gate control, internal charge pump, and precision current-sense amplifier. Its overvoltage protection uses dedicated internal clamp circuitry triggered by the OVCSEL pin configuration-no external TVS or Zener required-and responds within 5 μs typical to input surges.

Thermal management relies on junction temperature sensing with 157°C rising threshold and 11.5°C hysteresis; fault recovery is auto-retry (not latch-off), with 95-ms retry interval. The ILM pin provides dual functionality: resistor-to-ground sets current limit (453 Ω → 2 A), while its voltage output delivers 656 µA/A monitor gain with <±5.5% error at 1 A.

Key Specifications

Pinout & Package

TPS259621DDAR is housed in an 8-pin SOIC package (DDA) with 4.91 mm × 3.9 mm body and exposed thermal pad soldered to PCB ground plane for optimal thermal performance (R_θJA = 52.7°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar eFuse protection applications.

Compared with TPS259621DDAR, TPS259620DDAR trades automatic recovery for deterministic fault isolation, while TPS259631DDAR exchanges pin-select simplicity for flexible OVLO tuning-both share identical package, current monitoring accuracy, and 5-μs transient response.

Availability

TPS259621DDAR is available at Aetrix Electronics and suitable for energy metering, UL 60335-1 appliance control, and IP camera power management requiring stable component supply, long-term lifecycle support, and full traceability.

Supply support for TPS259621DDAR 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 delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

The TPS2596 family is designed as highly integrated eFuses for robust power rail protection in space-constrained, safety-critical applications-emphasizing fast overvoltage response, accurate current monitoring, and thermal resilience without external components.

FAQ

What is the overvoltage clamp response time of the TPS259621DDAR?

The TPS259621DDAR achieves a typical overvoltage clamp response time of 5 μs when an input surge exceeds the selected OVCSEL threshold (3.8 V, 5.7 V, or 13.8 V). This value is measured from voltage excursion onset to output clamping stabilization under 2-A load conditions, ensuring downstream ICs remain within absolute maximum ratings during fast transients.

How does the ILM pin function in the TPS259621DDAR?

The ILM pin in the TPS259621DDAR serves two simultaneous functions: (1) a resistor from ILM to GND sets the output current limit (e.g., 453 Ω → 2 A), and (2) the pin's analog voltage output provides real-time load current monitoring with 656 µA/A gain and ±5.5% accuracy at 1 A. This dual role eliminates separate current-sense resistors and amplifiers in the TPS259621DDAR design.

Does the TPS259621DDAR require external components for overvoltage protection?

No-the TPS259621DDAR implements fully internal overvoltage clamping. By configuring the OVCSEL pin (short-to-GND, 400-kΩ-to-GND, or open), the TPS259621DDAR selects one of three fixed clamp thresholds (3.8 V, 5.7 V, or 13.8 V) without any external TVS diodes, Zeners, or resistors. This integration reduces BOM cost and PCB footprint versus discrete protection solutions.

What thermal protection behavior does the TPS259621DDAR implement?

The TPS259621DDAR features overtemperature protection with a 157°C rising threshold and 11.5°C hysteresis. Upon thermal shutdown, it enters auto-retry mode-disabling the FET, waiting 95 ms, then attempting automatic recovery. This behavior is confirmed in the device comparison table and distinguishes the TPS259621DDAR from latch-off variants like TPS259620DDAR.

Can the TPS259621DDAR be used in UL 60335-1 certified appliances?

Yes-the TPS259621DDAR is explicitly cited in the Applications section for UL 60335-1 15-W low-power controllers in refrigerators, dishwashers, and washing machines. It supports compliance through its pin-selectable 3.8-V overvoltage clamp (meeting Section 15.3), auto-retry thermal response, and pending UL 2367 recognition, making it suitable for certified appliance designs without additional protection circuitry.