LM5170EVM-BIDIR: Need Help with multiple questions!

Hi Vijay,

the expert supporting this device is out of office. the question is assigned to him. He will reply after back to office next week.

Vijay,

Thanks for reaching out with your questions. Please see my responses

1.> My requirement is I/p Volt Entire Range from 12-48DC and O/p is needed to charge 48V battery i.e 50.5V but need 10-11A current, so can i use it?
Yes. It is possible to use the LM5170 for this application. Since it is ~500W two phase should be used.

2.> Do i need to pile multiple cards for my requirements or only one card?
1 EVM can be used. There is no need to stack multiple boards.

3.> if above question is yes, how many slave cards i will need?
No need for a slave board to be configured.

4.> Does it have Short Circuit protection?
Inherently a boost regulator doesn't have output short protection. This would need to be implemented separately.

5.> Does it require any heatsinks? (answer me in yes or no)
The depends on the MOSFETs used in the real application. Assuming you are using the LM5170 EVM no heat sinks should be needed.

6.> if above question is yes, which model or part number if you can suggest?

7.> How do i know if battery @ O/p is fully charged?
This depends on the battery chemistry and system. Typically there is another device controlling the charging functionality.

Thanks,

Garrett

Dear Garrett,
Thanks for your reply... I would also like to know suppose i want to use the card over a field test so can i keep all settings as per datasheet:
"Boost Mode Power-Up and Power-Down Sequence
1. Refer to Table 2 through Table 5 for proper jumper settings.
2. Turn on the HV-PS power supply and HV-E-Load.
3. Turn on the LV-PS power supply.
4. Apply a voltage > 2.5 V and < 6 V at J17-pin 5 (Master Enable).
5. Apply an analog voltage gradually rising from 0 V to 1.5 V at J17-pin 11 or J18-pin 11 (ISETA), or a
PWM signal of duty ratio of 0 to 48% at J17-pin 13 or J18-pin 13.
6. Perform the test."

but instead of point 5 suppose if just want to use evaluation Kit by just setting the ISETA to 1.5V directly instead of gradually increasing it from 0-1.5V is is possible. I mean i will set ISETA to 1.5V fix to use max current just use point 4 as switch to just turn the circuit On/OFF! can i use it in this way? So when i set pin4 to 5V my circuit will turn ON and when i set is 0V it will turn OFF. Will it not harm to components over the card right? due to surge or something?

Deeply awaiting your reply.

Regards,
Vijay Gohil

Still awaiting your reply!