Texas Instruments TPS274C65CPHRHAR

Overview

TPS274C65CPHRHAR from Texas Instruments is a quad-channel smart high-side switch with 72 mΩ R_ON, adjustable current limiting (250 mA–1.9 A), integrated thermal shutdown, short-to-ground protection, and wire-break/short-to-supply diagnostics. It drives resistive, capacitive, and inductive loads in 24-V industrial control systems and features dedicated STx fault pins per channel and VS_FLT supply-fault reporting.

For engineers reviewing the TPS274C65CPHRHAR datasheet, TPS274C65CPHRHAR pinout, TPS274C65CPHRHAR application, or TPS274C65CPHRHAR equivalent, key selection considerations include its 40-pin VQFN (RHA) package, GPIO interface, absence of current-sense output, configurable latch/auto-retry mode via LATCH pin, and support for external VDD derived from VS.

Technical Context

The TPS274C65CPHRHAR implements four independent high-side MOSFETs with integrated charge pump, output clamp for inductive demagnetization, and internal 3.3-V regulator (VDD output). Its protection architecture combines fast current-limit regulation (with ILIMCFG resistor programming), thermal shutdown (160–210°C trip, 20–35°C hysteresis), and open-drain fault signaling on STx and VS_FLT pins.

Diagnostics include off-state wire-break detection (5.6–6.5 V threshold, 38–64 µA pullup), short-to-supply detection, and VS undervoltage monitoring (9.5 V recovery, 8.6 V falling threshold). Fault handling is configurable via LATCH pin: high for latched-off behavior, low for auto-retry after t_RETRY = 0.6 ms.

Key Specifications

Pinout & Package

VQFN-40 (RHA) package with exposed thermal pad connected to GND; 6.0 mm × 6.0 mm body, 0.5 mm pin pitch, wettable flanks.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar smart high-side switch applications.

Compared with TPS274C65CPHAR, TPS274C65CPHRHAR offers finer low-current limit granularity (250 mA vs. 290 mA minimum), while NIS5135MN lacks diagnostics, multi-channel integration, and adjustable protection-making TPS274C65CPHRHAR the optimal choice for industrial modules requiring channel-level visibility and adaptive fault management.

Availability

TPS274C65CPHRHAR is available at Aetrix Electronics and suitable for industrial PLC digital output modules, IOLink master ports, and sensor power supplies requiring stable component supply, long-term lifecycle support, and traceable sourcing for production programs.

Supply support for TPS274C65CPHRHAR 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, embedded processing, and connectivity technologies for industrial, automotive, and communications markets.

The TPS274C65CPHRHAR belongs to TI's smart power switch product line, engineered specifically for industrial control systems requiring robust protection, precise current limiting, and real-time diagnostics in compact 24-V modules.

FAQ

What is the maximum continuous load current per channel for TPS274C65CPHRHAR?

The TPS274C65CPHRHAR supports 1.6 A continuous load current per channel at 85°C ambient temperature with all four channels enabled. At lower ambient temperatures or with fewer active channels (e.g., two enabled), it sustains up to 2.5 A per active channel. This rating assumes proper PCB thermal design with the exposed pad soldered to a sufficient GND copper area.

How does the ILIMCFG pin configure the current limit on TPS274C65CPHRHAR?

The ILIMCFG pin on TPS274C65CPHRHAR sets the current limit threshold using an external resistor to GND. For example, a 13.3 kΩ resistor configures 0.25 A, while 110 kΩ sets 1.9 A. The device uses this resistor value to program an internal 3-bit DAC, enabling eight discrete current limit settings between 250 mA and 1.9 A-no microcontroller or digital interface required.

Can TPS274C65CPHRHAR drive inductive loads without external components?

Yes, TPS274C65CPHRHAR integrates an output clamp circuit that safely dissipates inductive kickback energy during turn-off, eliminating the need for external flyback diodes when driving solenoids, relays, or valves. This clamp operates automatically and is rated for repeated demagnetization events without degradation-reducing BOM count and layout complexity.

What fault conditions does TPS274C65CPHRHAR detect and report?

TPS274C65CPHRHAR detects and reports short-to-ground, short-to-supply, overtemperature (160–210°C), and off-state wire-break (open-load) faults. Each channel has a dedicated open-drain STx pin indicating active faults, while VS_FLT signals supply undervoltage (<8.6 V) or overvoltage (>40 V). All fault reporting is electrically isolated from the load path.

Is external VDD required for TPS274C65CPHRHAR operation?

No, TPS274C65CPHRHAR includes an internal regulator generating 3.1–3.6 V for logic rails-no external VDD is required. However, an external VDD (3.0–5.5 V) may be supplied via the VDD pin if lower quiescent current is needed: internal regulator draws 4.9–5.6 mA from VS, while external VDD reduces VS IQ to 2.0–2.45 mA. External VDD must be derived from the same VS source.