TPS650864: How to control TPS6508641 power off sequence ?

Hi,

For TPS6508641 CTL4 initiates the power down sequence and it should be coming from external. How is it configured on the board (for power up)?

Sathish

I am sorry for replying so late,    CTL4 just  is pulled up to LDO3P3

Hi,

How are you making the TPS6508641 power off? 

If you drvive POWER_EN pin low then TPS6508641 will power off, this is an external driven pin.

Sathish

That is just  what I want to ask, who drive  this pin?     Power EN  should be  driven by  the zynq MPSOC  itself?  or  I need  a  MCU  to  control this pin? 

That is just  what I want to ask, who drive  this pin?     Power EN  should be  driven by  the zynq MPSOC  itself?  or  I need  a  MCU  to  control this pin? 

Hi 

 always on power map  means  Full Power Domain  do not power off separately，  still  need to control the FPGA  power off

Hi,

After VIN is removed from TPS6508641, LDO3P3 will go low and this will take CTL4 (connected to LDO3P3) (POWER_EN) low.

hi   that is  emergency shut down case,   if I want to realize  normal  power off( figure 2) , how can I do?

figure1

figure2

Hi, 

I can help provide support while Sathish is out of office.

POWER_EN (CTL4) depends on your system's design and desired enable control. 

External MCU is not necessary, typically POWER_EN can be connected to a push button circuit, supply power good, or any other method of enabling/disabling the power. 

What is the desired method of initiating power-down sequence, with an external push-button signal, I2C signal, or power good monitoring?
This can help identify the best connection method. 

Best Regards, 
Sarah