The TPS274C65EVM is a hardware evaluation module (EVM) used to enable hardware engineers to evaluate the full performance and functionality of the TPS274C65 industrial high side switch. The TPS274C65EVM contains everything needed to test and assess the TPS274C65 before designing it into part of a greater application's power system. The TPS274C65EVM is compatible with AS and BS version of TPS274C65. To use the SPI interface of TPS274C65AS and TPS274C65BS correctly, the evaluation module is designed to either use external microcontroller with jumper wires or in conjunction with an underlying Texas Instruments microcontroller by using the standardized BoosterPack™ plug-in module headers. A wide range of application features such as SPI communication, adjustable current limiting, and various protection and diagnostics are enabled and visible through use of this evaluation module.
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The Texas Instruments TPS274C65EVM is an evaluation module that is used to demonstrate and showcase all of the features of the underlying TPS274C65AS and TPS274C65BS industrial high side switch. This evaluation board provides a seamless way to connect a set of power supplies to the inputs of the TPS274C65, connect loads to the output channels, and switch on and off the device through SPI communication. An on-board 3.3-V buck-converter LMR36506 is included on the EVM to showcase the use of external VDD. Additionally this EVM includes BoosterPack plug-in module headers allowing the user to easily connect the TPS274C65 high side switch to either external microcontroller with jumper wires or a Texas Instruments microcontroller and write software to control and configure the device through SPI communication.
Features of the TPS274C65EVM include:
Device Version | Part Number | Interface | Reverse Current Blocking (RCB) | Integrated LED Driver | Integrated ADC | Fault Diagnosis |
---|---|---|---|---|---|---|
AS | TP274C65AS | SPI | Yes | Yes | Yes | Global fault output and single channel information available through SPI |
BS | TP274C65BS | SPI | No | No | No | Global fault output and single channel information available through SPI |
CP | TP274C65CP | GPIO | Yes | No | No | Per channel fault output |
Table 2-1 shows the comparison across different device versions. Please note that TPS274C65EVM supports version AS and BS.
Version AS and BS are using SPI interface. AS has full features sets including LED driver, RCB blocking FET driver and integrated ADC for digital current, temperature and voltage senses. The BS version is using SPI communication, but does not have LED driver, RCB blocking FET driver or integrated ADC. Version CP is using traditional GPIO interface with RCB driver.
A table of the versions of TPS274C65 and considerations that have to be taken can be found in Table 2-2.
TPS274C65 Version | EVM Considerations |
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AS | Default version populated on EVM. Leave J19, J20, J21, J22 open to enable the RCB FETs. Make sure R1 and R5 are populated to enable LED driving. For the rest of the connections, follow desired settings from Connection Descriptions. |
BS | Populate J19, J20, J21, J22 to bypass the RCB FETs. Do not populate R1 and R5 as there is no LED driving capability for this version. For the rest of the connections, follow desired settings from Connection Descriptions. |