Texas Instruments TPS26400PWPR

Overview

TPS26400PWPR from Texas Instruments is a 42-V, 2-A industrial eFuse with integrated reverse input polarity protection down to –42 V, 150-mΩ total R_ON, ±5% current limit accuracy at 1 A, and programmable fault response (circuit breaker, latch-off, auto-retry). It protects HMI power rails in factory automation against surge (IEC 61000-4-5), brownout, overvoltage, and hot-short events.

For engineers reviewing the TPS26400PWPR datasheet, TPS26400PWPR pinout, TPS26400PWPR application, or TPS26400PWPR equivalent, this page delivers verified electrical specs, HTSSOP-16 package mapping, IMON current monitoring accuracy (±8.5%), shutdown quiescent current (20 µA), and real-world implementation guidance for industrial power rail protection.

Technical Context

The TPS26400PWPR integrates back-to-back MOSFETs enabling true reverse current blocking and ±42-V input survivability. Its precision current-limit amplifier (±5% at 1 A) and 250-ns fast-trip comparator provide deterministic short-circuit isolation without external sensing components.

Programmable thresholds include UVLO (14.9 V nominal, 1-V hysteresis), OVP (32.6 V nominal), and output slew rate via dVdT pin (4.7 µA charging current, 24.6× gain). Fault reporting uses open-drain FLT with 4-ms assertion delay in circuit breaker mode and de-glitched timing (875 µs PGOOD deglitch).

Key Specifications

Pinout & Package

TPS26400PWPR is packaged in a 16-pin HTSSOP (PWP) with 5.00 mm × 4.40 mm body size and exposed PowerPad™ for thermal enhancement. Pin 1 is IN (input power), Pin 15/16 are OUT (output power), Pin 9 is GND, and Pin 8 is RTN (reference node for internal control circuits). The PowerPad must be connected to RTN via multiple vias - not used as sole electrical connection.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS26400PWPR, TPS26420PWPR adds an LDO at higher IQ cost, while MAX17613ATP+ requires external components to match basic surge and reverse-protection coverage - making TPS26400PWPR the most self-contained solution for field-deployed industrial equipment.

Availability

TPS26400PWPR is available at Aetrix Electronics and suitable for factory automation HMI power protection, fire safety system supervision, electronic thermostat hold-up, and industrial PC redundant power requiring stable component supply across extended temperature and surge-prone environments.

Supply support for TPS26400PWPR 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 and embedded processing technologies, with decades of expertise in power management ICs for industrial, automotive, and enterprise applications.

The TPS26400PWPR belongs to TI's industrial eFuse product line, engineered specifically for robust DC power rail protection in harsh environments - emphasizing ±42-V survivability, precision current limiting, and integrated reverse polarity handling without external components.

FAQ

What is the maximum input voltage the TPS26400PWPR can withstand without damage?

The TPS26400PWPR has an absolute maximum input voltage rating of ±45 V for continuous operation and ±55 V for 10-ms transients at 25°C. Its rated operating range is 4.2 V to 42 V, and it is explicitly designed to survive –42 V reverse polarity conditions - making it suitable for applications where incorrect wiring or negative transients may occur, such as in HVAC thermostat installations or field-serviceable HMI terminals.

How does the TPS26400PWPR implement reverse current blocking?

The TPS26400PWPR uses integrated back-to-back MOSFETs to block reverse current flow from OUT to IN. When V(IN) – V(OUT) falls below –10 mV (typical), the reverse protection comparator triggers within 1.5 µs to turn off both FETs. This feature ensures no current flows backward during input power failure or brownout - critical for maintaining output voltage holdup in systems like video doorbells and fire alarm panels.

Can the TPS26400PWPR be used in redundant power supply configurations?

Yes, the TPS26400PWPR supports Active ORing in redundant power systems. Two devices can be configured with their OUT pins tied together and FLT signals wire-ORed to coordinate fault reporting. The internal reverse blocking and precise current limiting allow seamless switchover between primary and auxiliary 24-V or 36-V supplies - commonly implemented in industrial PCs and elevator controllers requiring uninterrupted operation.

What is the accuracy and temperature drift of the current limit function in the TPS26400PWPR?

The TPS26400PWPR achieves ±5% current limit accuracy at 1 A across –40°C to +125°C. Over temperature, the current limit varies by less than ±0.6% (normalized) for R_ILIM = 5.36 kΩ, and worst-case drift remains within ±1% over full range - verified in Figure 7-23 of the datasheet. This stability enables reliable protection without derating in high-ambient environments like control cabinets near motors.

Does the TPS26400PWPR require external components for IEC 61000-4-5 surge protection?

The TPS26400PWPR itself withstands ±42-V transients but requires an external TVS diode to meet full IEC 61000-4-5 Level 3 (1-kV line-to-ground, 2-kV line-to-line) compliance. TI recommends a unidirectional 36-V TVS (e.g., SMAJ36A) placed at the IN pin. The device's robust internal protection blocks simplify design - no additional current-sense resistors, gate drivers, or discrete FETs are needed for basic surge-ready implementations.