TPS65400/Current sharing operation and sequence

Tsukui Yusuke

Guru 21930 points

Hi,

Could you tell me about current sharing operation.
Is the following processing all right for the sequence when customer use current sharing SW1/SW2 and SW3/SW4?
Which of A and B should I use?

In addition, Can startup do SW3/4 earlier from SW1/2?

Best Regards,
Yusuke/Japan Disty

over 10 years ago

0 Eric Guo1 over 10 years ago

TI__Intellectual 2590 points

Hi Yusuke,

B is perfer. you can use buck3,4's output to enable buck1,2 or you also can change enable delay time to get the sequence which you want througn PMbus.
BTW, who is your costomer? would you please help update the application infromation for us?
thanks!
Eric

0 Eric Guo1 over 10 years ago in reply to Eric Guo1

TI__Intellectual 2590 points

Add the sequence control picture.

thanks!

0 Tsukui Yusuke over 10 years ago in reply to Eric Guo1

Guru 21930 points

Hi Eric,

I could not open the attached file,
so I would appreciate if you could explain the details at your convenience.

Is pattern A wrong processing when used in the conditions of current sharing SW1 / SW2 and SW3 / SW4
The data sheets are listed as follows.

Best Regards,
Yusuke/Japan Disty

0 Eric Guo1 over 10 years ago in reply to Tsukui Yusuke

TI__Intellectual 2590 points

Hi Yusuke-san,

Yes, Enable1 is the control single of SW1/SW2 in sharing mode. it's ok to connect as A, but we recommand customer to connection liking B.

thanks!

Eric

0 Eric Guo1 over 10 years ago in reply to Tsukui Yusuke

TI__Intellectual 2590 points

Hi Yusuke-san,

If customer uses PMbus, they can modify the starting up delay time to control the sequence of SW3/4 earlier from SW1/2. If customer don't use PMbus, they can use SW3/4's output voltage to enable SW1/2 to control the sequence.

thanks!

Eric

Power management

Power management forum

TPS65400/Current sharing operation and sequence