Overview
The TPS24720RGTR, produced by Texas Instruments, is a high-efficiency, adjustable power-limiting hot-swap controller designed to protect 2.5-V to 18-V power rails. This device is an easy-to-use, full-featured protection solution that drives an external N-channel MOSFET, safeguarding the source, load, and the external MOSFET against various potentially damaging events. It offers accurate current limiting during startup, programmable FET safe operating area (SOA) protection, and adjustable current sense thresholds. The TPS24720 also features a power-good output, fast breaker for short-circuit protection, and an analog load-current monitor output, making it a robust and reliable component for various applications.
Key Specifications
| Parameter | Conditions | Min | Nom | Max | Unit |
|---|---|---|---|---|---|
| Input Voltage Range | EN, FFLTb, FLTb, GATE, OUT, PGb, SENSE, SET, VCC | -0.3 | 30 | V | |
| UVLO Threshold, Rising | 2.2 | 2.32 | 2.45 | V | |
| UVLO Threshold, Falling | 2.1 | 2.22 | 2.35 | V | |
| Supply Current | Enabled ― IOUT + IVCC + ISENSE | 1 | 1.4 | mA | |
| Maximum Junction Temperature | 125 | °C | |||
| Package | VQFN (16) | ||||
| Body Size | 3.00 mm × 3.00 mm |
Key Features
- 2.5-V to 18-V operation
- Accurate current limiting for startup
- Programmable FET SOA protection
- Adjustable current sense threshold
- Programmable fault timer
- Power-good output
- Fast breaker for short-circuit protection
- Analog load-current monitor output
- Programmable UV and OV protection
- Low-current standby mode
- FET fault detection flag
- 3-mm × 3-mm, 16-Pin QFN package
Applications
- Server backplanes
- Storage Area Networks (SAN)
- Telecommunications mezzanine cards
- Medical systems
- Plug-in modules
- Base stations
Q & A
- What is the operating voltage range of the TPS24720?
The TPS24720 operates within a voltage range of 2.5 V to 18 V.
- What type of protection does the TPS24720 offer during startup?
The TPS24720 offers accurate current limiting during startup to protect the system.
- How does the TPS24720 protect the external MOSFET?
The TPS24720 protects the external MOSFET by ensuring it operates within its safe operating area (SOA) through programmable power limiting.
- What are the different modes of operation for the fault timer in the TPS24720?
The TPS24720 can operate in either latch mode or retry mode, depending on the state of the LATCH pin.
- What is the purpose of the ENSD pin in the TPS24720?
The ENSD pin, when pulled low, shuts off all internal circuitry and places the device in a low-current standby mode.
- How does the TPS24720 handle short-circuit protection?
The TPS24720 features a fast breaker for short-circuit protection, which quickly disables the MOSFET in case of a short circuit.
- What is the function of the IMON pin in the TPS24720?
The IMON pin provides an analog output proportional to the current flowing through the sense resistor, allowing for current monitoring.
- What are the thermal shutdown conditions for the TPS24720?
The TPS24720 shuts down if the die temperature exceeds the OTSD rising threshold.
- How does the TPS24720 indicate a fault condition?
The TPS24720 indicates fault conditions through the FLTb, FFLTb, and PGb outputs.
- What is the package type and size of the TPS24720?
The TPS24720 comes in a 3-mm × 3-mm, 16-Pin QFN package.
