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Texas Instruments TPS274C65BSWRHAR
- Part No.:
- TPS274C65BSWRHAR
- Manufacturer:
- Texas Instruments
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
TPS274C65BSWRHAR.pdf
- Description:
- 12-V TO 36-V 65-M FOUR-CHANNEL H
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
TPS274C65BSWRHAR from Texas Instruments is a quad-channel SPI-controlled smart high-side switch with 72 mΩ RON, designed for industrial 24-V digital output modules. It delivers up to 2 A per channel, integrates thermal shutdown and short-to-ground protection, and supports inductive/capacitive/resistive loads - enabling robust load control in PLC I/O systems.
For engineers reviewing the TPS274C65BSWRHAR datasheet, TPS274C65BSWRHAR pinout, TPS274C65BSWRHAR application, or TPS274C65BSWRHAR equivalent, this page provides verified functional specifications, validated package mapping (RHA VQFN-40), confirmed SPI timing compliance, and real-world diagnostic capabilities including open-load detection and configurable fault handling.
Technical Context
The TPS274C65BSWRHAR implements four independent N-channel MOSFET high-side switches with integrated charge pump, current-limit regulation (250 mA–2.2 A), and dual-threshold inrush management. Its SPI interface (SCLK/SDI/SDO/CS) enables daisy-chain configuration and register-based diagnostics without requiring isolation components.
Unlike AS/ASH variants, the BS version omits reverse current blocking (RCB), LED drivers, integrated ADC, and analog current sense - reducing complexity for applications where only digital fault reporting (FLT pin) and basic SPI status reads are required. It retains full thermal monitoring, VS undervoltage lockout (9.5 V recovery), and 40-pin VQFN packaging with exposed thermal pad.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RON | 72 mΩ at 25°C (110 mΩ at 125°C); ensures ≤1.44 W conduction loss at 2 A, enabling compact thermal design in 6 mm × 6 mm package. |
| Max Output Current | 2 A per channel continuous (1.6 A @ 85°C ambient); supports industrial solenoids, valves, and indicator loads without external heatsinking. |
| VS Operating Range | 12 V to 36 V nominal; includes 9.5 V UVLO recovery and 8.6 V UVLO falling threshold for stable operation across brownout conditions. |
| SPI Timing | Min SCLK period = 100 ns (10 MHz max); meets industrial isolation barrier timing budgets with 45 ns setup/hold margins. |
| Fault Reporting | Open-drain FLT pin asserts low on any channel fault (short-to-GND, thermal shutdown, UVLO); requires external pull-up for system-level interrupt signaling. |
| Thermal Protection | Thermal shutdown at 160–210°C with 20–35°C hysteresis; automatic retry after 0.6 ms delay prevents latch-up during transient overloads. |
| Package | RHA: 40-pin VQFN, 6.0 mm × 6.0 mm, 0.5 mm pitch, exposed PowerPAD™ for enhanced thermal dissipation (RθJA = 25.4°C/W). |
Pinout & Package
RHA package: 40-pin VQFN (6.0 mm × 6.0 mm, 0.5 mm pitch) with exposed thermal pad connected to GND. Designed for automated assembly and high-power density PCB layouts in industrial control modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT1–OUT4 (Pins 38–39, 32–33, 12–13, 18–19) | High-side switched outputs | Four independent 24-V capable power outputs; each drives resistive/inductive/capacitive loads with integrated clamp diode for inductive demagnetization. |
| VS (Pins 4, 14–17, 34–37) | Main 24-V supply input | Eight dedicated VS pins minimize IR drop and improve current sharing; must be decoupled locally to support peak inrush currents up to 10 A. |
| GND (Pins 5, 21, Exposed Pad) | Power and signal reference | Three GND pins + thermal pad ensure low-impedance return path; pad must be soldered to internal ground plane for thermal and EMI performance. |
| SCLK, SDI, SDO, CS (Pins 9, 8, 7, 10) | SPI interface signals | Full-duplex 4-wire SPI supporting daisy-chain mode (DSPI pin high); compatible with standard microcontroller SPI peripherals without level-shifting. |
| FLT (Pin 2) | Fault status output | Open-drain logic-low assertion on any channel fault; requires external pull-up resistor (typically 4.7 kΩ to VDD) for MCU interrupt detection. |
| DO_EN (Pin 3) | Global output enable | Hardware override: pulling low disables all four channels regardless of SPI state; internal pull-down allows default-enable operation. |
| READY (Pin 1) | Initialization status | Logic-low indicates device ready for SPI communication after power-up; tied to GND via resistor to confirm initialization completion. |
| VDD (Pin 4) | Digital supply input | 3.0–5.5 V logic supply; can be sourced internally (from VS via regulator) or externally; regulates to 3.3 V ±0.3 V when enabled. |
Key Features
| Feature | Design Value |
|---|---|
| Quad-channel 72 mΩ RON | Enables efficient 2 A switching per channel with <1.5 W dissipation at full load, reducing thermal stress in dense I/O modules. |
| Configurable current limit (250 mA–2.2 A) | Per-channel programmable limit via SPI registers prevents damage to downstream loads and wiring during faults or startup surges. |
| Dual-threshold inrush management | Higher initial current limit during turn-on accelerates capacitor charging and incandescent lamp warm-up without triggering protection. |
| Integrated output clamp | Internal diode clamps inductive kickback to VS, eliminating need for external flyback diodes in solenoid/relay driver designs. |
| Open-load detection (on/off-state) | Detects broken wires or disconnected loads in both active and inactive states using precision current-sense comparators - no external components required. |
Applications
| Industrial Digital Output Module | IOLink Master Port |
|---|---|
Use Scenario: 24-V DC output stage in modular PLC backplanes delivering discrete control signals to actuators and sensors. IC Role / Device Role / Timing Role: Quad high-side switch providing isolated, protected, and diagnosable power delivery to field devices via DIN-rail mounted I/O cards. Use Value: Eliminates need for discrete MOSFETs, gate drivers, and protection ICs - reduces BOM count by ≥7 components per channel while enabling per-port diagnostics. |
Use Scenario: Power switching and supervision for IOLink master ports driving compliant sensors and actuators. IC Role / Device Role / Timing Role: High-side load switch with integrated fault reporting and open-load detection, synchronized to IOLink communication cycles via SPI. Use Value: Enables Class A/B compliance through precise current limiting and real-time wire-break detection - critical for predictive maintenance in smart factory deployments. |
| Sensor Supply Management | Industrial Gate Drive Interface |
Use Scenario: Controlled 24-V bias supply for analog and digital sensors in harsh environments with frequent cable disconnects. IC Role / Device Role / Timing Role: Smart power switch supplying regulated 24-V to sensor clusters, with automatic shutdown on short-circuit or open-wire events. Use Value: Prevents system-wide bus faults by isolating failed sensor branches - maintains uptime of remaining channels without manual intervention. |
Use Scenario: Driving external high-voltage gate drivers (e.g., for IGBTs/MOSFETs) in motor control inverters or power supplies. IC Role / Device Role / Timing Role: Robust, low-RON high-side switch enabling fast, protected enable/disable sequencing of gate driver supplies. Use Value: Guarantees clean power sequencing with <25 µs turn-on delay and integrated thermal foldback - avoids shoot-through during power-up/down transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS274C65ASWRHAR | Includes integrated ADC, analog current sense output (ISNS), reverse current blocking (RCB), and LED drivers - adds ~1.2 mA VDD quiescent current and 3 extra functional pins. | Required where analog load current feedback or RCB for bidirectional energy flow is needed (e.g., regenerative braking interfaces). | Select AS if current measurement resolution (±0.02 mA) and RCB functionality are mandatory; otherwise BS offers lower cost and simpler layout. |
| TPS27082LARHAR | Single-channel, 42 mΩ RON, no SPI interface; uses simple ON/OFF control with analog current sense and thermal warning flag. | Suitable for non-networked, low-channel-count applications where SPI configurability and multi-channel integration are unnecessary. | Choose TPS27082LARHAR for cost-sensitive single-load designs needing only basic protection - not a drop-in replacement due to pinout and interface mismatch. |
Compared with TPS274C65ASWRHAR, the TPS274C65BSWRHAR removes ADC, RCB, and LED functions to reduce system complexity and cost while retaining core diagnostics (FLT, READY, open-load detection). Against TPS274C65BSWRHAR, TPS27082LARHAR trades channel count and digital control for lower RON and simpler implementation in point-of-load scenarios.
Availability
TPS274C65BSWRHAR is available at Aetrix Electronics and suitable for industrial PLC systems, IOLink master ports, and sensor supply modules requiring stable component supply, long-term lifecycle support, and traceable sourcing for safety-critical infrastructure.
Supply support for TPS274C65BSWRHAR 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 family was developed specifically for next-generation industrial I/O modules, emphasizing SPI-configurable protection, diagnostics, and high-density packaging to replace legacy discrete high-side solutions in PLC and distributed control systems.
FAQ
What is the maximum continuous current per channel for the TPS274C65BSWRHAR?
The TPS274C65BSWRHAR supports 2 A continuous current per channel at 25°C ambient. Derating applies at higher temperatures: 1.6 A maximum at 85°C ambient, with thermal shutdown activating at 160–210°C junction temperature. The device's 72 mΩ RON ensures minimal self-heating under these conditions, making it suitable for sustained industrial actuator drive.
Does the TPS274C65BSWRHAR support daisy-chained SPI communication?
Yes, the TPS274C65BSWRHAR supports daisy-chained SPI via the DSPI pin (Pin 28). When pulled high, the device enters daisy-chain mode, allowing multiple TPS274C65BSWRHAR units to share a single SPI bus with serial data propagation (SDO of one to SDI of the next). This eliminates address conflicts and simplifies firmware for multi-channel I/O modules.
How does open-load detection work on the TPS274C65BSWRHAR?
The TPS274C65BSWRHAR performs on-state open-load detection by measuring output current against a programmable threshold (0.38–0.61 mA); off-state detection uses internal pull-up current (38–64 µA) and voltage thresholds (5.6–6.5 V) to identify broken wires. Both modes operate without external components and report status via SPI registers and the FLT pin.
What package type and thermal characteristics does the TPS274C65BSWRHAR use?
The TPS274C65BSWRHAR uses the RHA package: a 40-pin VQFN (6.0 mm × 6.0 mm, 0.5 mm pitch) with an exposed thermal pad. Its thermal resistance is RθJA = 25.4°C/W (4-layer board), RθJB = 7.6°C/W, and RθJC(bot) = 0.6°C/W - enabling effective heat transfer to the PCB ground plane when the PowerPAD™ is properly soldered.
Can the TPS274C65BSWRHAR drive inductive loads like solenoids or relays?
Yes, the TPS274C65BSWRHAR is explicitly designed for inductive loads. It integrates an output clamp to safely dissipate inductive kickback energy into the VS rail, eliminating external flyback diodes. Combined with dual-threshold current limiting and 10 A peak inrush capability, it reliably drives solenoids, contactors, and relay coils in industrial automation systems.
TPS274C65BSWRHAR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 40-VFQFN Exposed Pad
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Switch Type:
- General Purpose
- Number of Outputs:
- 4
- Ratio - Input:Output:
- 1:1
- Output Configuration:
- High Side
- Output Type:
- N-Channel
- Interface:
- SPI
- Voltage - Load:
- 12V ~ 36V
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 5.5V
- Current - Output (Max):
- 2.6A
- Rds On (Typ):
- 72mOhm
- Input Type:
- Non-Inverting
- Features:
- Status Flag
- Fault Protection:
- Current Limiting (Adjustable), Open Load Detect, Over Temperature, UVLO
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-VQFN (6x6)
TPS274C65BSWRHAR FAQ
1.How can I place an order for TPS274C65BSWRHAR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS274C65BSWRHAR 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 TPS274C65BSWRHAR reliable?
The price and inventory of TPS274C65BSWRHAR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS274C65BSWRHAR is usually 5 days.
3.What payment methods are accepted for TPS274C65BSWRHAR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS274C65BSWRHAR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS274C65BSWRHAR?
TPS274C65BSWRHAR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS274C65BSWRHAR 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 TPS274C65BSWRHAR?
For technical support, including TPS274C65BSWRHAR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS274C65BSWRHAR requirements.
6.How does Aetrix verify that TPS274C65BSWRHAR is sourced from the original manufacturer or authorized distributors?
All TPS274C65BSWRHAR 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 TPS274C65BSWRHAR meets industry standards.
7.What is the process for return or replacement of TPS274C65BSWRHAR?
All TPS274C65BSWRHAR units undergo pre-shipment inspection (PSI). If there is an issue with TPS274C65BSWRHAR, 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 TPS274C65BSWRHAR part is unused and in its original packaging.
Return procedure for TPS274C65BSWRHAR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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