TPS565208EVM-858

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Evaluation Boards - DC/DC & AC/DC (Off-Line) SMPS

The TPS565208EVM-858 evaluation module (EVM) is a wide-input-range, synchronous step-down converter with integrated power MOSFETs as well as an integrated bootstrap diode. The device is designed to accept input voltages from 6 V to 42 V, enabling applications that have a wide range of input supply voltage requirements. The device is capable of delivering up to 8 A of continuous output current with excellent load and line regulation. In addition, it features an adjustable constant-frequency current-mode architecture enabling superior transient response and noise performance.

The module also includes an enable pin that switches the regulator into a low-quiescent-current shutdown mode. Additionally, over-voltage protection and thermal shutdown features are also included for robust operation and safety of the system. Lastly, operating frequency is adjustable from as low as 400 kHz to the maximum of 1 MHz with peak efficiency up to 96%. Overall, the TPS565208EVM-858 is a great converter for applications that require a wide input-voltage range, robust protection features, and low-cost implementation.

Application Fields

The TPS565208EVM-858 is ideal for a variety of applications that require a wide input-voltage range with robust protection features and low-cost implementation. It can be used in applications such as automotive, industrial, and automation when powered by a wide variety of input sources. Other use cases include motor control, avionics, and remote sensing when powered by multiple battery sources or a wide-input-voltage power supply.

Working Principle

In action, the TPS565208EVM-858 module implements a current-mode step-down converter IC with integrated power MOSFETs and an integrated bootstrap diode. Its wide input voltage range (6 V to 42 V) enables applications with different power supply requirements. The module is capable of delivering up to 8 A of continuous output current and features adjustable constant-frequency current-mode architecture. This converter also includes several protection features, such as input over-voltage protection, output short-circuit protection, thermal shutdown, and enable pin for low quiescent current shutdown.

The basic working principle of the module is as follows. It starts with the input signal that is connected to the device. This input signal can range from 6 V to 42 V. The input enters the integrated low-side MOSFET and is routed through an integrated bootstrap diode that routes the positive-going portions of the signal to the high side MOSFET, allowing pulses to be generated. This action triggers the start of the cycle by causing each MOSFET to alternate between on and off states, and is then modulated by the current-mode feedback circuit.

The high-side and low-side power MOSFETs, when switched inwards, draw current from the input and sink current into the output respectively. The IC then regulates the output voltage by controlling the gap between the on and off times of each MOSFET. The output voltage can be set through an external resistor-divider network as needed, and the frequency of operation is adjustable via an external resistor between 400 kHz and 1 MHz.In addition to the basic working principle of the module, several features are implemented for robust operation and safety of the system. Over-voltage protection and thermal shutdown features are also included. Lastly, the enable pin allows for the switching of the regulator into a low-quiescent-current shutdown mode. This will be useful to conserve power when the system is not in use.

In summary, the TPS565208EVM-858 evaluation module is a wide-input-range, synchronous step-down converter that is ideal for a variety of applications due to its wide input-voltage range, robust protection features, and low-cost implementation. Its adjustable constant-frequency current mode architecture enables superior transient response and noise performance. The device includes several features for robust operation and safety of the system. To conclude, the TPS565208EVM-858 can be used in a variety of applications that require power conversion from a wide input-voltage range with robust protection features and low-cost implementation.

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