PTH08080W Query

rohit devmore

Intellectual 635 points

Other Parts Discussed in Thread: PTH08080W, TPS54350

We are designing a power supply using PTH08080W module. But there is nowhere specified the IC used inside this module.

Can anybody please tell me which IC is used in the above mentioned module?

Waiting for your reply.

Thanks and regards,

Arif

over 14 years ago

0 J Arrigo over 14 years ago

TI__Mastermind 28020 points

Hi Arif,

The controller used on the PTH08080W is TI TPS54350.

Please use the PTH08080W datasheet when verifying operating conditions; do not go by the IC's ratings. The IC may have different ratings then the module due to the many components used in the module.

0 Shruti Patel24 over 9 years ago in reply to J Arrigo

Prodigy 200 points

Hi,

want to use PTH08080W module as a regulated power supply (12V to 5V Dc to Dc converter) in my application

Could you please confirm that the module is EMI/EMC compatible or not?

Thanks &Regards,

Shruti Patel

0 Tom Guerin over 9 years ago in reply to Shruti Patel24

TI__Mastermind 38230 points

Hi :

I attached the emi/emc report on PTH08080Wxx

Tom

PTH08080 XX EMC_EMI 081_40292_1A[1].pdf

0 Shruti Patel24 over 9 years ago in reply to Tom Guerin

Prodigy 200 points

Hi,

Thanks for kind reply

I have one more query regarding current output of PTH08080W. Will it be able to provide current of 2.25A at 25 degree Centigrade temperature?

In my application I am having requirement of 5V output voltage with 2.25A output current at temperature of 25 degree Centigrade. My input voltage will be 12V

Thanks &Regards,

Shruti

0 Tom Guerin over 9 years ago in reply to Shruti Patel24

TI__Mastermind 38230 points

Hi Shruti:

PTH08080W thermal data(SOA) with 12Vin , 5Vout at 2.25 A load no air flow the ambient operating air temperature is 85°C .

At 25°C ambient top side power components case temperature is 46-48°C with no air flow with 5Vout at maximum 2.25Amp load.

Regards

Tom

0 Shruti Patel24 over 9 years ago in reply to Tom Guerin

Prodigy 200 points

HI

Thank you so much for reply

Could you please tell me what is the input current of the module PTH08080W?

Thanks & Regards,
Shruti

0 Tom Guerin over 9 years ago in reply to Shruti Patel24

TI__Mastermind 38230 points

Shruti:

The normal input current is based on theinput voltage , output current load and output voltage selected.

If you mean what is the input current when the inhibit pin when it is pulled low (0.2V to0.5V) by external open drain low leakage FET <100nA , the input current is about 5µA. The inhibit pin must always be controlled by an open drain FET, never a direct voltage if used or left open.

Tom

0 Shruti Patel24 over 9 years ago in reply to Tom Guerin

Prodigy 200 points

Hi Tom,

Thanks for reply

Could you please tell me about the PTH08080W circuit compliance with EMI/EMC conducted emission test as per CISPR 22 standard?

The document you have sent previously for the reference indicates the circuit complies with Radiated emissions but not mentioned about compliance for Conducted emissions

Please confirm me regarding the same

Thanks &Regards,
Shruti

0 Tom Guerin over 9 years ago in reply to Shruti Patel24

TI__Mastermind 38230 points

Shruti:

The EMC/conducted emssions is referenced ithe PTH08080W EMI/EMC reporT with data on page 15 fro engineering purposes only top pof page 15.

The Conducted Emissions data is provided for engineering purposes.Each final assembled PCB with any power component will have to be evaluated by teh end customer for CISPR22 . Your final assembly may require additional input PI filter, L&C , such as 1-5uH inductor and 4.7uf ceramic capacitors on both sides of the inductor.

Tom

0 Tom Guerin over 9 years ago in reply to Tom Guerin

TI__Mastermind 38230 points

Shruti:

I attached a PI filter schematic which can be used to reduce primary side emissions up to 3A input current.

Tom

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PTH08080W Query