TPS7H4010-SEP: TPS7H4010-SEPRNP

Hi Sam,

Do you need to calculate the inductor current for your device? If so, page 15 of the device datasheet contains equations for calculating current ripple, peak inductor current, etc... (link to datasheet page 15). Please let me know if you are looking for a different calculation.

Table 8-1 (link) also provides recommended component values for various VOUT and Fsw configurations.

To do an AC simulation of the TPS7H4010-SEP, a PSPCIE model is available in the device page on ti.com. The AC simulation is the "Average" model. (link to PSPICE model)

Thanks,

Andy

Hi Andy

Thanks for the help

I did the calculations using page 15 formula

But  I am getting incorrect answers for current 1.5A ? 

I want the output current of the regulator using below values

Is this set for Max current for 6A ? so it draws current according to the load?

Heare are the numbers below

1.  Vin to the regualtor 24VDC

2. Vout of the regulator 3.3V

3. Fsw 400KHz

4. L=4.7uH (FIXED IND 4.7UH 14.6A 9.77MOHM)

Current should be 6A?

5. On the design pin17 we have a 10K GND? data sheet says just connected to the ground?

Please advice

Regards

Sam

Hi Sam,

Can you please clarify your question?

The TPS7H4010-SEP has a maximum IOUT of 6A, the current limit on this device is not adjustable.

Regarding pin 17 (SYNC/MODE) connecting directly to GND is okay for this pin to set the device to AUTO mode. Going through a 10k resistor to GND should also set the device to AUTO mode.

Thanks,

Andy

Hi Andy

Thanks for the help

So current draw according to load, if load draw 3A it draws 3A ? If load varies say 6A it draws 6A Max?

Regards

Sam

Hi Sam,

The TPS7H4010-SEP will provide a constant voltage and deliver current to the load between 0-6A according to the load.

As a buck converter, the current at the input to the converter is determined by the output current, switch duty cycle, and efficiency losses:

Since a buck converter regulates the input to a lower output voltage, the current at the input is also lower than the output current.

Please let me know if that did not address your question.

Thanks,

Andy

Hi Andy

Thanks for the help

How do I determine source current on each pin on TPS7H4010-SEP ?

Please advice

Regards

Sam

Hi Andy 

I also need help with PSPICE model I downloaded ran but the results are not good for gain and phase margin

is it possible to do screen share Monday?

Please advice

Regards

Sam

Hi Sam,

While not every pin of the device has had its current characterized, for those that have (PVIN, EN,  BIAS, FB, etc...) there are listings in the datasheet Electrical Characteristics table for operating current, leakage current, or source current.

Since the TPS7H4010-SEP does not have adjustable compensation, we typically recommended following the component recommendations in table 8-1, as those are configurations that have been previously tested. If you must use a custom configuration, section 7.3.10 Internal Compensation and CFF explains the two primary ways of controlling AC response on the TPS7H4010-SEP with COUT and Cff.

If you would prefer to set up a call, I can reach out to you at the email associated with your E2E account if that is okay.

Thanks,

Andy

Hi Andy

Thanks for the information is it possible to setup meeting today? I am available now

Regards

sam

Hi Sam,

I will reach out to you at the email associated with your E2E account.

Thanks,

Andy

ok thanks

Regards

Sam