TPS40057PWPG4

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TPS40057PWPG4 Application Field and Working Principle

DCS-DC switching controllers are integrated circuits that offer electrical control of a power converter. The TPS40057PWPG4 is a DCS-DC switching controller typically used in low and medium power DCS-DC voltage regulators, including buck, boost, buck-boost, flyback, and inverting converters. It consists of non-overlapping input scans, regulated voltage spike suppression technique that allows higher frequency operation, an adjustable slope compensation current limit and various protection features.

Application Field

The TPS40057PWPG4 is typically used in low to medium power DCS-DC voltage regulators, such as buck, boost, buck-boost, flyback, and inverting converters. The device is able to provide up to 3A of output current at 4.5V to 50V. The device also integrates input scans, regulated voltage spike suppression technique, adjustable slope compensation current limit, built-in protection functions, a high resolution feedback loop, and adjustable pulse-width modulation (PWM) frequency.

Working Principle

The heart of the TPS40057PWPG4 is a high-speed Pulse-Width Modulation (PWM) control section. This PWM control architecture utilizes two inputs for the regulation loop, an external reference input (Vref) and an input voltage feedback loop. This method eliminates the need for slope compensation and also reduces the size of the external components by eliminating the need for RF size components. When the output voltage approaches the setpoint, the PWM is disabled and the output voltage is regulated.

The controller also features an adjustable slope compensation current limit to further enhance the stability of the regulation loop. The limitation works by limiting the amount of power that can be provided to the output. This prevents excessive output currents and ensures a stable output voltage during transient conditions. The response time of the current limitation circuit is adjustable by external resistors.

The TPS40057PWPG4 also includes various protection features, such as over-temperature and under-voltage protection, and over-current protection. These features ensure that the device is protected from common failure scenarios, such as excessive output currents or temperatures and low input voltages.

The TPS40057PWPG4 is a powerful DCS-DC switching controller and can be used for a wide range of DCS-DC voltage regulation applications. The device has a high-speed PWM control architecture, adjustable slope compensation current limit, various protection features and a high resolution feedback loop. These features make the TPS40057PWPG4 an excellent choice for DCS-DC voltage regulation applications.

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