STPM801 - unknown pins?

[JTo]

Hello,

We are evaluating the STEVAL-STPM801 board, testing the STPM801 as integrated hot swap, soft start and oring protections device.

On the EVAL board the TM pins with nrs: 8, 13, 14, 27, 28, 29 are equipped with jumpers to select pull-up or pull-down, while in the datasheet of the STPM801 those pins must be connected to GND.

Also in the datasheet there is in chapter 5.1.5 STAND-BY mode enter/exit, in several graphs a pattern given for ENABLE-IN. I can not find the ENABLE pin.

 

However, on the EVAL board the signal connected to pin nr 8 in that figure 1 has the name TM_EN_1/2.

The TM lines are also feed to a jumper (e.g. JP17) with signal names like SPI1_*.

 

The difference between the Eval board and the datasheet makes it confusing.

• Which pin is the Enable pin (mentioned in chapter 5.1.5 of the STPM801 datasheet)?
• What is the functionality of the other TM pins?
• Is there a "hidden feature" in the STPM801 available?

 

Hope that anyone can clarify.

kind regards

[fabiop]

Dear user,

Answering the questions:

• Which pin is the Enable pin (mentioned in chapter 5.1.5 of the STPM801 datasheet)? I think you are referring to pin 27 (STBY_IN)
• What is the functionality of the other TM pins? They are the pins used in Test Mode
• Is there a "hidden feature" in the STPM801 available? The Test Mode is normally NOT used by customers.

Please let us know if you have other questions, we will be glad to reply to you.

 

Best Regards

[JTo]

Hello Fabiop,

See my feedback in italic:

• Which pin is the Enable pin (mentioned in chapter 5.1.5 of the STPM801 datasheet)?I think you are referring to pin 27 (STBY_IN) --> That is the question ;-).  Refering to figure 13, 14, etc: there is a pattern named "Enable pattern IN". On what pin this patterns must be supplied?
• What is the functionality of the other TM pins? They are the pins used in Test Mode --> OKE
• Is there a "hidden feature" in the STPM801 available? The Test Mode is normally NOT used by customers. --> OKE, clear.

regards

[fabiop]

Dear user,

Q: Refering to figure 13, 14, etc: there is a pattern named "Enable pattern IN". On what pin this patterns must be supplied?

A: STBY_IN

Please let us know if you need something else.

Best Regards