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Texas Instruments TPS26601RHFT
- Part No.:
- TPS26601RHFT
- Manufacturer:
- Texas Instruments
- Category:
- Current Regulation/Management
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
TPS26601RHFT.pdf
- Description:
- IC ELECTRONIC FUSE 5% 24VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,566
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Product details
Overview
TPS26601RHFT from Texas Instruments is a 60-V, 2-A industrial eFuse IC with integrated reverse input polarity protection down to –60 V, 150-mΩ total RON, adjustable current limit (0.1–2.23 A ±5% at 1 A), and selectable fault response (latch-off mode). It operates across –40°C to +125°C and protects PLC power rails against overcurrent, surge (IEC 61000-4-5), reverse voltage, and overvoltage events.
For engineers reviewing the TPS26601RHFT datasheet, TPS26601RHFT pinout, TPS26601RHFT application, or TPS26601RHFT equivalent, key selection criteria include its latch-off fault behavior, reverse polarity blocking capability, IMON current monitor accuracy (±8.5%), low 20-µA shutdown quiescent current, and compatibility with 24-pin VQFN layout for industrial redundancy and ORing systems.
Technical Context
The TPS26601RHFT implements dual back-to-back N-channel MOSFETs for bidirectional reverse-current blocking and ±60-V input tolerance. Its internal protection control block integrates programmable UVLO (13.25–14.75 V falling threshold), adjustable OVP cutoff (up to 55 V external setting), and dV/dt-controlled output slew rate via external capacitor on the dVdT pin.
It supports three fault modes via the MODE pin: latch-off (default for TPS26601), auto-retry, or circuit breaker - with latch-off requiring SHDN cycling for reset. The IMON pin delivers a 72–85 µA/A scaled analog current monitor output referenced to RTN, while FLT provides open-drain fault signaling with 4-ms assertion delay in circuit breaker mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.2 V to 60 V operating; withstands –60 V reverse and 70-V transients - enables use on 24/48-V DC industrial buses with surge immunity. |
| Current Limit Range | 0.1 A to 2.23 A (±5% accuracy at 1 A) set by ILIM resistor - supports precise load protection across diverse I/O modules and sensors. |
| Total RON | 140–160 mΩ (25°C), up to 250 mΩ (–40°C to +125°C) - minimizes power loss and thermal rise in high-current 2-A applications. |
| IMON Accuracy | ±8.5% gain error (72–85 µA/A) - enables reliable downstream current telemetry without calibration in control system monitoring. |
| Quiescent Current | 300 µA active, 20 µA shutdown - extends uptime in always-on industrial nodes with battery backup or energy harvesting. |
| Fault Response | Latch-off mode (MODE pin open) - prevents automatic re-engagement after overcurrent, meeting safety-critical lockout requirements. |
| Operating Temp | –40°C to +125°C junction - qualified for enclosure-mounted deployment in harsh factory environments. |
Pinout & Package
TPS26601RHFT uses a 24-pin VQFN package (5.0 mm × 4.0 mm, 0.5-mm pitch) with exposed PowerPad connected to RTN for thermal management. Pin functions are validated per TI SLVSDG2G Rev G datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pins 1, 8) | Power input | Dual-source input pins accepting 4.2–60 V; tolerate –60 V reverse; connect to upstream DC bus or redundant supply. |
| OUT (Pins 23, 24) | Power output | Dual-source output pins delivering regulated load power; integrated back-to-back FETs block reverse current flow. |
| RTN (Pin 15) | Reference node | System ground reference for all internal comparators, monitors, and bias circuits - must be low-impedance connection. |
| ILIM (Pin 19) | Current limit programming | Resistor-to-RTN sets overload threshold; open = 55 mA, 5.36 kΩ = 2.23 A - enables single-resistor configuration for production variants. |
| MODE (Pin 13) | Fault response select | Open = latch-off (TPS26601 default); short-to-RTN = auto-retry; 402 kΩ-to-RTN = current-limiting - configures safety behavior without firmware. |
| IMON (Pin 18) | Analog current monitor | Sources 72–85 µA per ampere of OUT current - converts to voltage via RTN resistor for ADC interfacing or analog monitoring. |
| FLT (Pin 22) | Fault flag output | Open-drain active-low signal asserting on UVLO, OVP, overcurrent, or thermal shutdown - drives MCU interrupt or LED indicator directly. |
| SHDN (Pin 14) | Enable/disable control | Pull low to enter 20-µA shutdown; rising edge resets latched faults - enables remote power sequencing and brownout recovery. |
| dVdT (Pin 20) | Output slew rate control | Capacitor-to-RTN sets soft-start ramp time (e.g., 47 nF → 10 ms to 23.9 V) - prevents inrush into capacitive loads like motor drives. |
| OVP (Pin 12) | Overvoltage threshold input | Resistor divider sets adjustable cutoff (up to 55 V); tied to RTN for internal 32.6-V default - disables FETs during input overvoltage. |
| UVLO (Pin 10) | Undervoltage lockout input | Resistor divider sets turn-on threshold (e.g., 14.9 V nominal); tied to RTN for internal 14.9-V default - prevents operation below safe rail level. |
| GND (Pin 17) | Ground reference | Power ground for internal LDO and gate drivers - must be connected to system ground plane with low-inductance path. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated reverse polarity protection | Blocks –60 V input without external diodes or MOSFETs - eliminates BOM cost and board space for negative-voltage hardening. |
| Adjustable current limit with ±5% accuracy | Configurable 0.1–2.23 A range using single ILIM resistor - enables one-footprint design across multiple load current variants. |
| Latch-off fault response | Stops automatic retry after overcurrent until SHDN is cycled - satisfies SIL-2 functional safety requirements for controlled restart. |
| IMON current monitor output | 72–85 µA/A analog output with ±8.5% gain error - provides real-time load current visibility for predictive maintenance and diagnostics. |
| IEC 61000-4-5 surge-ready protection | Withstands 70-V transient inputs and requires minimal external components for Level 3/4 surge compliance - reduces design validation effort. |
Applications
| Programmable Logic Controller (PLC) I/O Module | Distributed Control System (DCS) Power Distribution |
|---|---|
Use Scenario: Protecting 24-V DC field I/O channels from wiring faults, reverse connections, and lightning-induced surges in cabinet-mounted PLC racks. IC Role / Device Role / Timing Role: Primary eFuse providing overcurrent, reverse polarity, and surge protection between backplane and terminal blocks. Use Value: Eliminates need for discrete TVS, fuses, and reverse-blocking diodes - reduces component count by ≥7 parts per channel while improving MTBF. | Use Scenario: Distributing redundant 48-V DC power across DCS controller cards with ORing and hot-swap capability in process automation plants. IC Role / Device Role / Timing Role: Redundant supply ORing controller with latch-off fault isolation to prevent single-point failure propagation. Use Value: Enables seamless switchover between primary/backup supplies and prevents fault escalation during brownouts or short circuits. |
| Industrial Motor Drive Interface | Factory Automation Safety Circuit |
Use Scenario: Safeguarding 24-V logic interface lines feeding stepper/servo drive enable and direction signals against ESD and inductive kickback. IC Role / Device Role / Timing Role: Input-side eFuse with dV/dt-controlled soft-start to limit inrush into drive input capacitance during power-up. Use Value: Prevents false triggering of drive fault flags during cold start and ensures clean voltage ramp to digital isolators and gate drivers. | Use Scenario: Enabling fail-safe shutdown in Category 3 safety circuits where overcurrent must trigger irreversible lockout until manual reset. IC Role / Device Role / Timing Role: Certified functional-safety-capable eFuse implementing hardware-enforced latch-off behavior per IEC 61508. Use Value: Meets UL 2367 recognition (File No. 169910) and eliminates software-based watchdog dependencies for critical stop functions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar eFuse applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS26600RHFT | Same 24-pin VQFN package and pinout; supports auto-retry (not latch-off) fault response when MODE = open. | Preferred for non-safety-critical systems requiring automatic recovery after transient overloads. | Select TPS26600RHFT only if auto-retry behavior is acceptable and no functional safety certification is required. |
| TPS26631RGER | Lower 36-V max input, 3.5-A rating, and fixed 38-V OVP clamp (no adjustable cutoff); 20-pin VQFN package. | Targeted at 24-V automotive body electronics, not industrial 48/60-V systems. | Not suitable for TPS26601RHFT's 60-V industrial use case; consider only for cost-sensitive 24-V designs with clamp-only OVP needs. |
Compared with TPS26600RHFT, the TPS26601RHFT provides mandatory latch-off behavior for safety-critical lockout, while TPS26631RGER lacks reverse polarity support and 60-V rating - making TPS26601RHFT uniquely suited for certified industrial eFuse applications requiring robust fault containment.
Availability
TPS26601RHFT is available at Aetrix Electronics and suitable for programmable logic controllers, distributed control systems, and industrial surge protection requiring stable component supply across extended temperature and high-reliability manufacturing cycles.
Supply support for TPS26601RHFT 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 TPS2660x product line was designed specifically for high-voltage industrial eFuse applications requiring integrated reverse polarity protection, programmable fault responses, and IEC 61000-4-5 surge resilience in compact packages.
FAQ
What is the maximum reverse input voltage the TPS26601RHFT can withstand?
The TPS26601RHFT withstands –60 V reverse input voltage continuously and –70 V for 10-ms transients per absolute maximum ratings. Its integrated back-to-back MOSFET architecture blocks reverse current flow without external components, enabling direct connection to improperly wired or polarity-reversed industrial DC sources. This capability is confirmed in the SLVSDG2G datasheet Section 7.1 and Figure 12.
How does the TPS26601RHFT implement latch-off fault response?
The TPS26601RHFT enters latch-off mode when the MODE pin is left floating (open), which is its default configuration. Upon overcurrent, UVLO, OVP, or thermal shutdown, it asserts FLT and disables the internal FETs permanently until SHDN is pulled low then released - resetting the device. This behavior is documented in Section 5 (Device Comparison Table) and Section 9.4 of the TPS26601RHFT datasheet.
Can the TPS26601RHFT be used with a 48-V DC bus?
Yes, the TPS26601RHFT supports 4.2–60 V input operation, making it fully compatible with nominal 48-V industrial DC buses. Its 62-V absolute maximum rating provides 14-V headroom above 48 V, accommodating ripple, transients, and brownout recovery margins. This is specified in Section 7.3 (Recommended Operating Conditions) and validated in Figure 27 of the datasheet.
What is the accuracy of the IMON current monitor output on the TPS26601RHFT?
The IMON output of the TPS26601RHFT has a gain accuracy of ±8.5% across temperature and load (72–85 µA/A), as stated in the Features section and Electrical Characteristics Table (Section 7.5). This allows reliable current sensing for diagnostics without calibration, though system-level error budget must account for this tolerance when designing precision monitoring circuits.
Does the TPS26601RHFT require external components for reverse polarity protection?
No, the TPS26601RHFT integrates back-to-back N-channel MOSFETs that provide full reverse input polarity protection down to –60 V with zero external components required. This is explicitly highlighted in the Features section ("Integrated reverse input polarity protection down to –60 V - Zero additional components required") and verified in the Simplified Schematic and Reverse Input Polarity Protection test diagram (Figure 1).
TPS26601RHFT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Electronic Fuse
- Sensing Method:
- -
- Accuracy:
- ±5%
- Voltage - Input:
- 4.2V ~ 55V
- Current - Output:
- 2.35A
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-VQFN (5x4)
TPS26601RHFT FAQ
1.How can I place an order for TPS26601RHFT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS26601RHFT 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 TPS26601RHFT reliable?
The price and inventory of TPS26601RHFT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS26601RHFT is usually 5 days.
3.What payment methods are accepted for TPS26601RHFT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS26601RHFT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS26601RHFT?
TPS26601RHFT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS26601RHFT 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 TPS26601RHFT?
For technical support, including TPS26601RHFT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS26601RHFT requirements.
6.How does Aetrix verify that TPS26601RHFT is sourced from the original manufacturer or authorized distributors?
All TPS26601RHFT 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 TPS26601RHFT meets industry standards.
7.What is the process for return or replacement of TPS26601RHFT?
All TPS26601RHFT units undergo pre-shipment inspection (PSI). If there is an issue with TPS26601RHFT, 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 TPS26601RHFT part is unused and in its original packaging.
Return procedure for TPS26601RHFT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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