TPS61041-Q1: About connection method (Vin and Vsw)

Koji Hayashi92

Mastermind 6970 points

Part Number: TPS61041-Q1
Other Parts Discussed in Thread: TPS61170

Hi All,

Is it OK to connect to SW and VIN with different voltage?

(12V-Coil-SWpin)

For example, VIN = 6 V, SW = 12 V

Is it OK if the absolute maximum ratings are observed?

Customer's expected voltage to be used is VIN < SW.

Best Regards,
Koji Hayashi.

over 6 years ago

0 Helen chen over 6 years ago

TI__Mastermind 40080 points

I send you a message just now. I want to know who is the end customer? could you please tell me today using message. Our marketing team will visit Japan soon, they want to know the customer information.

Vin and SW can be seperated. But If the Vin and SW seperate, the operation frequency will changed. Could you please share the volatge range add to Vin pin and the voltage range add to SW to me? So that I coulld check in the lab.

0 Koji Hayashi92 over 6 years ago in reply to Helen chen

Mastermind 6970 points

Hi Helen-san

Thank you for response.

I confirmed with the customer.
Vin=5V
SW=4 to 24V

Best Regards,
Koji Hayashi.

0 Helen chen over 6 years ago in reply to Koji Hayashi92

TI__Mastermind 40080 points

I'll chekc it and update to you early next week. By the way, could you please share the customer name to us?

0 Koji Hayashi92 over 6 years ago in reply to Helen chen

Mastermind 6970 points

Hi Helen-san

I am really sorry to have asked you so much.
Could you inform me about the current status ?
When can I receive the value ?

Does the frequency become fast?

May I recommend this how to use?

Best Regards,
Koji Hayashi.

0 Helen chen over 6 years ago in reply to Koji Hayashi92

TI__Mastermind 40080 points

Sorry for the late. I'm on vocation and will reply to you tomorrow!

0 Helen chen over 6 years ago in reply to Koji Hayashi92

TI__Mastermind 40080 points

When Vin=5V, SW=4-24V, the fsw various too much, from 200kHz-10kHz....

So we didn't recommend customer connect in this way. Suggtes they use TPS61170 if want to seperate Vin and SW.

0 Koji Hayashi92 over 6 years ago in reply to Helen chen

Mastermind 6970 points

Hi Helen-san

I think that the frequency also fluctuates when the input voltage fluctuates even in normal use.
Does that change even if the voltage is stable (eg Vin = 5V, SW = 10V)?

Best Regards,
Koji Hayashi.

0 Helen chen over 6 years ago in reply to Koji Hayashi92

TI__Mastermind 40080 points

it will change, but not so much.

Power management

Power management forum

TPS61041-Q1: About connection method (Vin and Vsw)