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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Power Distribution Switches, Load Drivers

Texas Instruments TPS274C65ASRHAR

Name: TPS274C65ASRHAR
Brand: Texas Instruments
SKU: TPS274C65ASRHAR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TPS274C65ASRHAR

Manufacturer:: Texas Instruments

Category:: Power Distribution Switches, Load Drivers

Package:: 40-VFQFN Exposed Pad

Datasheet:: TPS274C65ASRHAR.pdf

Description:: 12-V TO 36-V 65-M FOUR-CHANNEL H

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TPS274C65ASRHAR from Texas Instruments is a quad-channel smart high-side switch with SPI interface, 72 mΩ R_ON, adjustable current limiting (250 mA–2.2 A), integrated reverse current blocking, and digital load current sensing via on-chip ADC. It operates from 12 V to 36 V supply and delivers up to 2 A per channel in industrial PLC digital output modules.

For engineers reviewing the TPS274C65ASRHAR datasheet, TPS274C65ASRHAR pinout, TPS274C65ASRHAR application, or TPS274C65ASRHAR equivalent, key selection criteria include SPI-configurable fault handling, dual-threshold inrush management for capacitive loads, open-load detection in both on/off states, and thermal shutdown with 160°C trip point and 27°C hysteresis.

Technical Context

The TPS274C65ASRHAR implements four independent N-channel MOSFET high-side switches with integrated charge pump, reverse current blocking FETs (RCB1–RCB4), and analog current sense with 1160:1 ratio feeding a 10-bit ADC. Its SPI interface supports daisy-chain configuration and enables real-time register access to fault status, current measurements, and diagnostic flags.

It features configurable inrush current period with elevated current limit during turn-on, integrated output clamp for inductive demagnetization, and robust protection including short-to-ground detection, VS undervoltage lockout (9.3 V falling), and thermal warning at 130°C before shutdown at 185°C.

Key Specifications

Parameter	Value and Actual Design Meaning
R_ON (per channel)	72 mΩ at 25°C - ensures ≤0.3 W conduction loss at 2 A, enabling compact thermal design in 6 mm × 6 mm VQFN
Current limit range	250 mA to 2.2 A - digitally programmable via SPI to match load requirements and improve system-level reliability
Supply voltage (VS)	12 V to 36 V - compatible with standard 24 V industrial bus, with UVLO at 9.3 V falling and 10 V rising
Operating temperature	–40°C to +125°C - qualified for harsh industrial environments with thermal shutdown at 185°C
SPI timing	Min. SCLK period = 100 ns - supports ≥10 MHz operation for fast diagnostics and control loop response
Current sense accuracy	±3% full-scale error - enables precise predictive maintenance and load health monitoring without external shunt
Output clamp voltage	44 V typical at 10 mA - safely dissipates inductive energy during turn-off, eliminating need for external flyback diodes

Pinout & Package

The TPS274C65ASRHAR is housed in a 40-pin VQFN package (RHA) measuring 6.0 mm × 6.0 mm with 0.5 mm pitch and exposed thermal pad connected to GND.

Pin/Terminal	Circuit Role	Design Meaning
OUT1–OUT4	High-side switched outputs	Four independent 24 V load drive terminals; each supports 2 A continuous with integrated RCB FET gate drive (RCB1–RCB4)
VS (pins 14–17, 34–37)	Main power input	24 V supply rail connection; eight dedicated pins minimize IR drop and enhance thermal dissipation
SCLK, SDI, SDO, CS	SPI interface	Full-duplex 4-wire SPI supporting daisy-chain mode (DSPI pin); enables isolated control and diagnostics
FLT	Fault indicator	Open-drain output asserting low on any channel fault (short, overtemp, open-load); requires external pull-up
READY	Initialization status	Logic-low signal indicating internal regulator stabilization and readiness for SPI communication
REG_EN	Internal regulator enable	Float to enable internal 3.3 V LDO; tie to GND to disable and use external VDD supply
ISNS	Analog current sense output	Provides scaled analog current representation (1160× I_OUT) for external ADC or direct monitoring

Key Features

Feature	Design Value
Quad-channel SPI-controlled switching	Enables centralized, isolated control of four independent 24 V loads with single MCU interface and no optocouplers
Dual-threshold inrush management	Configurable higher current limit during turn-on accelerates capacitor charging and incandescent lamp warm-up without tripping protection
On- and off-state open-load detection	Detects broken wires or disconnected loads regardless of switch state-critical for safety-critical PLC output verification
Integrated reverse current blocking	Prevents backfeed from downstream loads into shared VS rail, eliminating need for external Schottky diodes
Digital current measurement via ADC	Reports load current digitally over SPI, enabling predictive maintenance and eliminating analog signal routing across isolation barriers

Applications

Industrial PLC Digital Output Module	IOLink Master Port Power Switching
Use Scenario: Driving solenoids, valves, and indicator lamps in modular PLC racks with strict diagnostics and safety compliance. IC Role / Device Role / Timing Role: Quad high-side switch providing individually controllable 24 V outputs with real-time current monitoring and fault reporting via SPI. Use Value: Eliminates discrete protection circuitry and external current sense amplifiers, reducing BOM count by ≥7 components per channel while meeting IEC 61000-4-5 surge immunity (±1 kV).	Use Scenario: Supplying regulated 24 V power to IOLink sensors with dynamic load profiling and short-circuit recovery. IC Role / Device Role / Timing Role: Smart power switch managing sensor supply with programmable current limit, inrush control, and open-load detection during hot-plug events. Use Value: Enables automatic sensor identification and health assessment via current signature analysis, reducing field service time by detecting failing sensors before complete failure.
Sensor Power Distribution Unit	Industrial Gate Drive Interface
Use Scenario: Centralized 24 V distribution to multiple analog and digital sensors in factory automation systems. IC Role / Device Role / Timing Role: High-side switch with wire-break detection ensuring sensor connectivity integrity and preventing false readings due to open circuits. Use Value: Provides continuous open-load diagnostics in both ON and OFF states-detecting cable breaks even when sensor is inactive, improving system uptime and diagnostics coverage.	Use Scenario: Driving isolated gate drivers for IGBTs/MOSFETs in motor control inverters where supply rail integrity is critical. IC Role / Device Role / Timing Role: Protected 24 V auxiliary supply switch with reverse current blocking and fast short-circuit response (<25 µs turnoff delay). Use Value: Prevents backfeed from gate driver bootstrap circuits into main VS rail, avoiding unintended device activation and ensuring clean power sequencing during startup/shutdown.

Industrial PLC Digital Output Module

IOLink Master Port Power Switching

Use Scenario: Driving solenoids, valves, and indicator lamps in modular PLC racks with strict diagnostics and safety compliance.

IC Role / Device Role / Timing Role: Quad high-side switch providing individually controllable 24 V outputs with real-time current monitoring and fault reporting via SPI.

Use Value: Eliminates discrete protection circuitry and external current sense amplifiers, reducing BOM count by ≥7 components per channel while meeting IEC 61000-4-5 surge immunity (±1 kV).

Use Scenario: Supplying regulated 24 V power to IOLink sensors with dynamic load profiling and short-circuit recovery.

IC Role / Device Role / Timing Role: Smart power switch managing sensor supply with programmable current limit, inrush control, and open-load detection during hot-plug events.

Use Value: Enables automatic sensor identification and health assessment via current signature analysis, reducing field service time by detecting failing sensors before complete failure.

Sensor Power Distribution Unit

Industrial Gate Drive Interface

Use Scenario: Centralized 24 V distribution to multiple analog and digital sensors in factory automation systems.

IC Role / Device Role / Timing Role: High-side switch with wire-break detection ensuring sensor connectivity integrity and preventing false readings due to open circuits.

Use Value: Provides continuous open-load diagnostics in both ON and OFF states-detecting cable breaks even when sensor is inactive, improving system uptime and diagnostics coverage.

Use Scenario: Driving isolated gate drivers for IGBTs/MOSFETs in motor control inverters where supply rail integrity is critical.

IC Role / Device Role / Timing Role: Protected 24 V auxiliary supply switch with reverse current blocking and fast short-circuit response (<25 µs turnoff delay).

Use Value: Prevents backfeed from gate driver bootstrap circuits into main VS rail, avoiding unintended device activation and ensuring clean power sequencing during startup/shutdown.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS274C65ASHRHAR	Higher current limit range (290 mA–2.45 A); includes integrated LED matrix driver outputs (LEDOUT1–4)	Required when driving LED status indicators or multiplexed display panels alongside load switching	Select TPS274C65ASHRHAR if LED driver functionality is needed; otherwise, TPS274C65ASRHAR offers identical switching, protection, and diagnostics at lower cost
TPS27082RHAR	Single-channel, 40 mΩ R_ON, no SPI interface, analog-only current sense, no RCB or ADC	Suitable only for simple on/off control without diagnostics or multi-channel coordination	Choose TPS27082RHAR only for cost-sensitive, non-diagnostic applications requiring minimal channel count and no digital interface

Compared with TPS274C65ASHRHAR, TPS274C65ASRHAR trades LED driver capability for lower unit cost and identical core switching, protection, and diagnostic performance; versus TPS27082RHAR, it adds SPI configurability, quad-channel integration, reverse current blocking, and digital current reporting-enabling scalable, intelligent industrial I/O architectures.

Availability

TPS274C65ASRHAR is available at Aetrix Electronics and suitable for industrial PLC digital output modules, IOLink master ports, and sensor power distribution units requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TPS274C65ASRHAR 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 power management technologies for industrial, automotive, and communications markets.

The TPS274C65xS product line is designed specifically for intelligent 24 V industrial I/O systems, integrating protection, diagnostics, and digital control to replace legacy discrete high-side switch solutions with higher reliability and reduced system complexity.

FAQ

What is the maximum continuous current per channel for TPS274C65ASRHAR?

The TPS274C65ASRHAR supports 1.6 A continuous load current per channel at 85°C ambient temperature with all four channels enabled. At 25°C, it can sustain up to 2 A per channel under typical conditions. Derating applies above 85°C, and parallel-channel operation (e.g., OUT1+OUT2 tied) enables up to 4.3 A total with matched current limiting.

Does TPS274C65ASRHAR support reverse current blocking, and how is it implemented?

Yes, TPS274C65ASRHAR implements reverse current blocking using integrated N-channel FETs controlled by RCB1–RCB4 pins. When VS < VOUT, the RCB FET turns off within 2 µs (typical), preventing backfeed. The threshold is –64 mV (falling), with 100 ms internal reset interval and 7 V gate drive voltage-eliminating need for external diodes in shared-rail systems.

How does the current sense function work in TPS274C65ASRHAR?

The TPS274C65ASRHAR provides two current sense paths: analog ISNS output (1160× I_OUT) for external monitoring, and a 10-bit integrated ADC reporting digital current values over SPI. Accuracy is ±3% full-scale, supporting diagnostics such as load drift detection, short-circuit identification, and predictive maintenance without external shunts or amplifiers.

Can TPS274C65ASRHAR detect open-load faults when the switch is turned off?

Yes, TPS274C65ASRHAR performs off-state open-load (wire-break) detection using internal 51 µA pull-up current. It reports faults via SPI register WB_OFF_CHx and asserts FLT pin if enabled. Detection threshold is 6 V at the output pin, allowing reliable identification of broken cables or disconnected loads even when the channel is disabled.

What thermal protection features does TPS274C65ASRHAR include?

TPS274C65ASRHAR includes thermal shutdown at 185°C (typical), thermal warning at 130°C (typical), and 27°C hysteresis. It also monitors junction temperature via an internal sensor (TSNS output) and reports thermal status in real time over SPI. Fault recovery occurs automatically after 0.6 ms cooldown, with no external reset required.

TPS274C65ASRHAR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Package/Case:: 40-VFQFN Exposed Pad

Series:: -

Packaging:: Tape & Reel (TR)

Product Status:: Active

Switch Type:: Latched Driver

Number of Outputs:: 4

Ratio - Input:Output:: -

Output Configuration:: High Side

Output Type:: N-Channel

Interface:: Logic, PWM

Voltage - Load:: 12V ~ 36V

Voltage - Supply (Vcc/Vdd):: 12V ~ 36V

Current - Output (Max):: 2.6A

Rds On (Typ):: -

Input Type:: -

Features:: Shutdown

Fault Protection:: Reverse Current, UVLO

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 40-VQFN (6x6)

TPS274C65ASRHAR FAQ

1.How can I place an order for TPS274C65ASRHAR through Aetrix?

Please submit a Request for Quotation (RFQ) for TPS274C65ASRHAR 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 TPS274C65ASRHAR reliable?

The price and inventory of TPS274C65ASRHAR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS274C65ASRHAR is usually 5 days.

3.What payment methods are accepted for TPS274C65ASRHAR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS274C65ASRHAR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TPS274C65ASRHAR?

TPS274C65ASRHAR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TPS274C65ASRHAR 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 TPS274C65ASRHAR?

For technical support, including TPS274C65ASRHAR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS274C65ASRHAR requirements.

6.How does Aetrix verify that TPS274C65ASRHAR is sourced from the original manufacturer or authorized distributors?

All TPS274C65ASRHAR 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 TPS274C65ASRHAR meets industry standards.

7.What is the process for return or replacement of TPS274C65ASRHAR?

All TPS274C65ASRHAR units undergo pre-shipment inspection (PSI). If there is an issue with TPS274C65ASRHAR, 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 TPS274C65ASRHAR part is unused and in its original packaging.

Return procedure for TPS274C65ASRHAR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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