TPS40021EVM-001

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Texas Instruments TPS40021EVM-001 is an evaluation module that has a protection and control IC TPS40021 that supports a multiphase DC/DC step-down power supply for high-current microprocessors. The control IC TPS40021 has programmable on/off sequencing, and out of phase operation, and can drive up to five channels with power. There are dual synchronous rectification output stages, enabling higher output power for high current applications, as well as current sharing among phases, and maximum switch current limit feature. Additionally, the module includes a PMBus-compliant interface that behaves as a virtual fan header, allowing software to control its temperature, and fan speed.

The TPS40021EVM-001 is designed for high-current system loads, such as dual processor in server systems, and it is based on a 6-phase synchronous buck converter for maximum efficiency (up to 94%). The module can also handle high-capacitive input voltage transients, up to 48A, with an input voltage range of 18V-24V. The module also supports input compensation that enables the device to run over temperatures down to -40C and up to85C with 24V input voltage.

The TPS40021EVM-001 is a 6-phase synchronous buck converter that consists of a control IC, two voltage feedback terminals, six N-channel synchronous MOSFETs, a resistor feedback network, two inductors, two (smaller) sense resistors, and a single-ended primary inductance converter (SEPIC) topology. The system utilizes a standard 6-pin PMBus compliant connector for communication. The application works in different modes, such as peak current mode operation, dual-loop operation, and pulse frequency modulation (PFM). All of the modes are programmable via PMBus or by using the provided onboard switches.

The overall working principle of the TPS40021EVM-001 involves providing positive and negative current flows to the microprocessor. The IC monitors the voltage levels and adjusts the on/off signals sent to the MOSFETs. The 6-pin PMBus connector is used to enable system software to connect to the microprocessor and configure the various parameters of the power supply. The module also features dual-loop control, in which the voltage loop is used to regulate the output voltage, and the current loop is used to control the switching speed and current. Using these two loops, the maximum efficiency can be attained for the given system.

In terms of application field, the TPS40021EVM-001 is mainly designed to be used for high-current microprocessor power supplies and servers. It has a wide range of operating temperature and input voltage, making it an ideal solution for applications that require optimal performance even in harsh environmental conditions. Additionally, its high-current outputs, efficient operation, and PMBus interface make it a very attractive option for use in modern high-powered systems.

To sum up, TPS40021EVM-001 is an evaluation module that has a protection and control IC TPS40021 which supports a multiphase DC/DC step-down power and is suitable for high-current system loads, such as dual processor in server systems. It has a wide range of operating temperature and input voltage as well as features dual-loop control, peak current mode operation, dual synchronous rectification output stages, high-current outputs, efficient operation, and PMBus interface. All of the modes are programmable via PMBus or by using the provided onboard switches.

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