Overview
The TPS26400RHFR from Texas Instruments is a high-voltage, 2-A electronic fuse (eFuse) that integrates a comprehensive suite of protection features. This device is designed to operate over a wide supply input range of 4.2 to 42 V, making it suitable for controlling various popular DC bus voltages. It provides robust protection against both positive and negative supply voltages up to ±42 V, ensuring reliable operation in diverse applications.
The TPS26400RHFR features integrated back-to-back MOSFETs with a total on-resistance (RON) of 150 mΩ, adjustable current limit, and integrated reverse input polarity protection. This device also includes load protection during surge events, an IMON current indicator output, and low quiescent current in both operating and shutdown modes.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Operating Voltage | Input voltage range | 4.2 V to 42 V |
| Absolute Maximum Voltage | Maximum input voltage | 45 V |
| Current Limit | Adjustable current limit range | 0.1 A to 2.23 A (±5% accuracy at 1 A) |
| On-Resistance (RON) | Total on-resistance of the MOSFETs | 150 mΩ |
| Quiescent Current | Operating and shutdown quiescent current | 300 μA (operating), 20 μA (shutdown) |
| Package Options | Available packages | 16-pin HTSSOP, 24-pin VQFN |
| Temperature Range | Operating temperature range | –40°C to +125°C |
| Reverse Polarity Protection | Protection against negative input voltage | Down to –42 V |
| Overvoltage Protection (OVP) | Programmable overvoltage protection threshold | Adjustable |
| Current Indicator Output (IMON) | Analog current monitor output accuracy | ±8.5% |
Key Features
- Integrated reverse input polarity protection down to –42 V without requiring additional components.
- Integrated back-to-back MOSFETs with 150 mΩ total RON.
- Adjustable current limit from 0.1 A to 2.23 A with ±5% accuracy at 1 A.
- Load protection during surge events (IEC 61000-4-5) with suitable TVS.
- IMON current indicator output with ±8.5% accuracy.
- Low quiescent current: 300 μA in operating mode and 20 μA in shutdown mode.
- Adjustable UVLO, OVP cut-off, and output slew rate control.
- Reverse current blocking feature.
- Selectable current-limiting fault response options: auto-retry, latch off, and circuit breaker modes.
- Available in 16-pin HTSSOP and 24-pin VQFN packages.
Applications
- HMI power protection in factory automation.
- Fire safety systems.
- Electronic thermostats and video doorbells.
- Industrial PCs.
- Elevators.
Q & A
- What is the operating voltage range of the TPS26400RHFR?
The operating voltage range is from 4.2 V to 42 V, with an absolute maximum voltage of 45 V.
- What is the total on-resistance (RON) of the integrated MOSFETs?
The total on-resistance (RON) of the integrated MOSFETs is 150 mΩ.
- How does the device protect against reverse input polarity?
The device provides integrated reverse input polarity protection down to –42 V without requiring additional components.
- What are the available package options for the TPS26400RHFR?
The device is available in 16-pin HTSSOP and 24-pin VQFN packages.
- What is the quiescent current in operating and shutdown modes?
The quiescent current is 300 μA in operating mode and 20 μA in shutdown mode).
- Does the device provide overvoltage protection?
Yes, the device provides programmable overvoltage protection (OVP) with an adjustable threshold).
- How does the IMON current indicator output work?
The IMON pin sources a scaled-down ratio of the current through the internal FET, which can be converted to a proportional voltage using a resistor to RTN).
- What are the selectable current-limiting fault response options?
The device offers selectable current-limiting fault response options including auto-retry, latch off, and circuit breaker modes).
- What are some typical applications of the TPS26400RHFR?
Typical applications include HMI power protection in factory automation, fire safety systems, electronic thermostats, video doorbells, industrial PCs, and elevators).
- How does the device handle load protection during surge events?
The device provides load protection during surge events (IEC 61000-4-5) with suitable TVS).
