TPS25942ARVCT Integrated Circuits (ICs)

Series:	--
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Type:	Hot Swap Controller
Number of Channels:	1
Internal Switch(s):	Yes
Applications:	General Purpose
Features:	Auto Retry, Thermal Limit
Programmable Features:	Current Limit, OVP, Slew Rate, UVLO
Voltage - Supply:	2.7 V ~ 18 V
Current - Output (Max):	5.3A
Operating Temperature:	-40°C ~ 125°C
Current - Supply:	202µA
Mounting Type:	Surface Mount
Package / Case:	20-WFQFN Exposed Pad
Supplier Device Package:	20-WQFN (4x3)
Feature Pins:	dVdT, /ENBLK, EN/UVLO, /FLT, IMON, ILIM, OVP, PGOOD, PGTH

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TPS25942ARVCT Application Field and Working Principle

PMIC - Hot Swap Controllers are used increasingly in today\'s electronics industry owing to their small size, low power consumption and reliable performance. We have seen their growing use in high-powered and complex electronic applications. The TPS25942ARVCT is such an example.This two-channel Hot Swap controller can be used to enable a high-side device through I²C while minimizing the possibility of over-current or short circuit failure. It works in tune with other devices to look after the voltage level and current levels while, at the same time, allowing the device an effective “hot-swap”. This makes it a perfect choice for applications requiring constant monitoring, like in-circuit debugging, and self-sustaining power supplies.The TPS25942ARVCT goes beyond simple hot swap protection by also offering I²C-controlled power sequencing for I²C systems, a bidirectional current monitor, and adjustable voltage, current, and thermal protection. Furthermore, it has a compact size with a QFN-16 1.6×1.6 mm package.In particular, this Hot Swap Controller is an excellent choice for a wide range of applications, including LED drivers, distributed power systems, automotive electronics, battery management systems, and intelligent power modules.

Features

The TPS25942ARVCT features a number of key features and benefits.For starters, the controller can manage two independent channels, providing independent over-current protection and programmable auto-retry capability. This allows it to be used in applications with complex power sequencing requirements.The TPS25942ARVCT also comes with adjustable voltage, current, and thermal levels, as well as bi-directional current sensing and I²C-controlled power sequencing. This provides flexible options for controlling power consumption while monitoring the current level on a given channel.It can also tolerate a wide input voltage range of 0.88V to 5.5V, making it compatible with a wide range of device types.

Working Principle

At its core, the TPS25942ARVCT is an array of multiple N-channel MOSFETs connected in series with the source of each MOSFET connected to the same power rail. The power rail is essentially the same rail that supplies the target device.When the controller senses an over-current on the power rail, a sense signal is sent to the controller\'s internal over-current detection circuit. The over-current detection circuit then communicates with the gate drive and control logic units, disabling the gate drive and cutting off the power supply.The controller will then wait till the voltage on the power rail drops to a pre-determined level before reenabling the gate drive, restoring the power supply. This mechanism allows the controller to protect itself and the target device from damage due to overload or short circuit.

Conclusion

The TPS25942ARVCT is a reliable and efficient two-channel Hot Swap controller that offers adjustable voltage, current, and thermal protection, I²C-controlled power sequencing, and bi-directional current sensing, among many other features. This makes it an ideal choice for a wide range of applications, including distributed power systems, LED drivers, automotive electronics and intelligent power modules.

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