Part Number: TPS40170 Other Parts Discussed in Thread: PMP8629 Our customer would like to design the following power condition circuit.
Vin: 40V Vout: 12V Iout: 20A
I checked PMP6680 design because input and output condition is almost the same. However TI…
Other Parts Discussed in Thread: CSD19531Q5A , CSD19532Q5B , CSD19533Q5A , CSD19534Q5A Hi sir,
We want to use PMP6680 for 53V~56V vin , 12v/20A vout.
Please help provide TI's MosFET part number for hi-side and lo-side. Thanks!
BR,
Peter
Other Parts Discussed in Thread: TPS40170 Dear Sir,
I am going to use TPS40170 for our power chain for 48~56V vin , 12v/20A vout. So far I am studying PMP6680 EVM which vin is 43V~53V.
I check TPS40170 specification VIN MAX is 60V. Can PMP6680 EVM can…
Hi John,
The TPS40170 configuration in WEBENCH Power Designer uses single FETs, and as such is not suitable for delivering the high power described by your requirements. This type of design is best addressed with a dual-FET output stage, and will need…
We do have a reference design close to the specs mentioned.
http://www.ti.com/tool/pmp6680 48Vin, 12Vout at 20Amps
It uses parallel fets for both top and bottom in the synchronous buck. At this power level, 13V 13A 169W, it may be better to use an interleaved…
Neelesh,
This design was built up on the PMP6680 PCB. Please find the gerbers for this board in the following link.
5775.PMP6680_REVA.GBR.ZIP
Best Regards, Anthony
Hi Hung,
This design uses two MOSFETs for the high-side and low-side to increase efficiency and reduce power dissipated in each MOSFET individually. If a single MOSFET is used the power supply will run very hot.
I recommend using a 4 layer board with…
Hi David,
There is no weakness I know of at the moment. I will say after reviewing the information so far, the high-side FET used in this application seems like more than usual for the TPS40170. For example, PMP6680 uses 2x BSC123N08NS3 G which has typically…
Hi, NA
Your evaluation module PMP6680 has almost same capacitor value(from C2 to C9 : 2.2uF X 8).
I think the difference is a large capacitor of C1(220uF).
Is threre any possibility due to input surge when switch on.
Hello Na,
Thank you for the reply. The reference design we mainly based on is PMP6680 (48Vin, 12Vout@20A).
The pin failed is pin 17, Hdrv for high side drive. After the failure, TPS40170 did not have any gate driving output signals from pin 17 or pin…