TPS2086D

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TPS2086D Application Field and Working Principle

The TPS2086D is a scalable multi-channel current-limited switch from Texas Instruments that is widely used in power management and system protection legislation. It is part of the TI TPS20006D family and typically takes up to 15 channels for internal current limiting, overcurrent protection and external fault protection. The device uses an array of 8 NMOS switches which can drive up to 8 channels independently with adjustable current limits, and it can also drive up to 4 additional secondary channels with a default current limit to provide the system the required protection over multiple power paths.

The control scheme of the TPS2086D utilizes dynamic current sensing to adjust the power supply current just before a limit is exceeded. This adjustment may be used to either limit the maximum current level, or provide a soft start current ramp up. Through these features, designers are able to optimize the performance of their systems while protecting against overcurrent and fault conditions.

The TPS2086D falls under the category of PMIC - Power Distribution Switches, Load Drivers. This device is used in a variety of applications such as automotive electronics, desktop and portable computing, gaming consoles, motor control, and other applications that require current-limited power distribution for overcurrent protection. Common applications for this device include automotive on-board battery chargers and DC-DC converters, as well as other power management applications.

The TPS2086D has a total supply current of 10mA, with each of the 8 channels approved for up to 3A. The control logic includes an adjustable current limit from 200mA to 3A and a soft start current ramp up to protect the system from high inrush current caused by sudden voltage drops. The device also benefits from an adjustable delay time between soft start and full load current, allowing designers to optimize their power-up sequence. Additionally, the TPS2086D has an adjustable delay timer per channel, allowing designers to determine the amount of time required for each output to ramp up or down.

The TPS2086D has several safety features to minimize system damage in overcurrent situations. These include an overvoltage positive and negative latch protection, an overcurrent protection (OCP) trip point of up to 3A per channel and a fault timer that latches up during an overcurrent or open-circuit fault situation. This protection can protect the system by not only limiting the current during the fault, but also by preventing rapid switch cycling from one state to another.

In addition to the features already listed, the TPS2086D also offers automatic and manual shutdown capabilities, adjustable pre-bias delay, and adjustable low-side and output power rating. This device is capable of providing a wide range of current-limited, regulated power outputs for a variety of applications. The designers must match their external components with the power rating of the device to achieve the desired performance.

The TPS2086D is a multi-channel current-limited switch which features a scalable architecture and a variety of protection features. It is used in a variety of applications such as automotive electronics, desktop and portable computing, gaming consoles, motor control, and other applications that require current-limited power distribution for overcurrent protection. It has adjustable current limits and a soft start current ramp up to protect the system from sudden voltage drops, overvoltage latch protection, overcurrent protection, and more. The device can also provide automatic and manual shutdown capabilities, adjustable pre-bias delay, and adjustable output power rating. The TPS2086D is an ideal solution for current-limited, regulated power outputs for designers looking to optimize the performance of their systems while providing the required protection.

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