Texas Instruments TPS16412DRCR

Overview

TPS16412DRCR from Texas Instruments is a 40V, 1.8A current-limiting eFuse with IN-to-OUT short detection, ±6% current limit accuracy at 1A, ultra-low 152mΩ typical R_ON, and adjustable dV/dt slew rate control for inrush management. It operates from 2.7V to 40V input, integrates overtemperature and overvoltage protection, and targets industrial appliance power rails such as HVAC actuators and medical ventilator subsystems.

For engineers reviewing the TPS16412DRCR datasheet, TPS16412DRCR pinout, TPS16412DRCR application, or TPS16412DRCR equivalent, key selection criteria include its auto-retry fault behavior, configurable current limit via ILIM resistor (5.1kΩ–348kΩ), IDLY blanking time support (0.012–10µF), and QFN-10 3×3mm package with PowerPAD thermal enhancement.

Technical Context

The TPS16412DRCR implements active current limiting using an internal N-channel FET with precision current-sense feedback and programmable blanking time (IDLY) to tolerate motor startup surges. Its FLT pin provides open-drain fault signaling for MCU diagnostics or external PFET control, while dV/dt pin enables capacitor-based output ramp control to limit inrush into large capacitive loads.

It features dual-stage overcurrent response: fast-trip protection at 1.9×IOCP (e.g., ~2.23A with 7.32kΩ IOCP resistor) and sustained current limiting at user-set ILIM (up to 1.88A). Thermal shutdown activates at 155°C with 12°C hysteresis, and IN-to-OUT short detection triggers within 135ms when the FET is ON.

Key Specifications

Pinout & Package

TPS16412DRCR uses a 10-pin VSON (DRC) package: 3.00mm × 3.00mm body, 0.5mm pitch, exposed PowerPAD on bottom for thermal dissipation. The PowerPAD must be soldered to PCB GND plane using ≥4 thermal vias.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS16412DRCR, TPS16413DRCR offers identical protection specs but latches off permanently on fault-requiring external reset-while TPS25982LDDFR trades short-detection and slew control for lower R_ON and higher current, making it unsuitable for standards-compliant appliance designs.

Availability

TPS16412DRCR is available at Aetrix Electronics and suitable for HVAC actuator control, medical ventilator subsystems, refrigerator compressor interfaces, and oven control board protection requiring stable component supply and long-term industrial lifecycle support.

Supply support for TPS16412DRCR 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 medical applications.

The TPS1641x family was designed specifically for IEC60335/UL60730-compliant appliance power distribution, integrating current limiting, IN-OUT short detection, and thermal protection in a single 3×3mm QFN package.

FAQ

What is the maximum continuous current rating for TPS16412DRCR?

The TPS16412DRCR supports a maximum continuous output current of 1.8A at 25°C ambient with proper PCB thermal design. Its ±6% current limit accuracy is specified at 1A, and the actual limit is set by the ILIM resistor-e.g., 5.49kΩ yields 1.77A typical. Derating applies above 85°C ambient per the R_θJA = 43.7°C/W thermal metric.

How does TPS16412DRCR implement IN-to-OUT short detection?

The TPS16412DRCR detects IN-to-OUT shorts with resistance ≤30mΩ using internal circuitry that monitors voltage differential across the FET. When detected, it asserts the open-drain FLT pin low within 135ms if the FET is ON, or 20ms if OFF. This hardware-level detection satisfies IEC60335 Clause 19.11.2 requirements without external components.

Can TPS16412DRCR be used with input voltages below 4.5V?

Yes-TPS16412DRCR operates from 2.7V to 40V input, unlike the power-limit variants (TPS16410/11) which require ≥4.5V. This makes TPS16412DRCR suitable for 3.3V logic-supply rails and low-voltage industrial sensors, provided the ILIM resistor is selected to maintain accuracy across the full voltage range.

What is the purpose of the IDLY pin on TPS16412DRCR?

The IDLY pin on TPS16412DRCR accepts a capacitor (0.012–10µF) to configure blanking time for transient overcurrent events. During this window, the device permits current up to the IOCP threshold (e.g., 2.23A) before enforcing the lower ILIM limit (e.g., 1.77A), enabling reliable motor startup without false trips.

Does TPS16412DRCR support overvoltage protection beyond 40V?

Yes-while the IN pin is rated to 40V, the OVP and FLT pins are rated to 60V. By connecting FLT to the gate of an external PFET, TPS16412DRCR can provide overvoltage protection up to 60V. The internal OVP circuit remains active up to 42V; external PFET extends clamping capability for higher-bus applications.