Hi,
Is there any pin configuration that enable/disable TPS544B20? I don't prefer PMbus. Thanks.
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Hello,
By default TPS544B20 is configured to convert power when its CNTL pin is high. The CNTL pin functions like a traditional analog "enable" pin. If its left floating, then the CNTL pin will pull high by itself, due to an internal pull-up current source on the pin, so the TPS544B20 will start converting power whenever input power is present. The CNTL pin can also be used like an "enable" pin. Pull it high to convert power, pull it low to stop converting power.
The ON_OFF_CONFIG command can be used to change this behavior. For example, it can be set to ignore the state of the CNTL pin altogether, and always convert power whenever input power is present. It can be set to ignore the CNTL pin, and only turn-on by the PMBus OPERATION command. It can be set to enable/disable by the CNTL pin, with inverted polarity (Active Low), or even combinations of CNTL + OPERATION.
The factory default setting is CNTL pin only, Active high. And the CNTL pin will pull high by itself if its floated, as described above.