max. Current??

[mikeljo]

Hi,

on this side viewtopic.php?f=25&t=1922&e=0
The Text says:

The TMC603 directly drives 6 external N-channel MOSFETs for motor currents up to 20A and up to 50V.

but some Lines deeper:

Electrical data
up to 30A motor current
9V to 50V supply voltage
EMV optimized current controlled gate drivers up to 150mA
QGD protection: supports recent power MOSFET generation
3.3V or 5V interface

Same difference between the Datasheet and the Short Specs.

What is the correct amount?

Thanks

Bye
mikeljo

[TRINAMIC_BD]

Sorry for the confusion. It is corrected to 30A in the actual data sheet. In fact 30A is not a hard border, but just a hint, as the maximum current mainly depends on the MOSFETs used.

[dcwebaccount]

but how is the max voltage VM ? can i use external switching regulator ? e.g. main VCC 100V and also applied to mosfet, but switching regulator output ~15v to TMC603's +VM pin

[TRINAMIC_BD]

Correct, VM can be up to 50V continuously. The high-side MOSFETs drain-supply and VM must come from the same supply voltage in order to use all functions of the chip.

[dcwebaccount]

Correct, VM can be up to 50V continuously. The high-side MOSFETs drain-supply and VM must come from the same supply voltage in order to use all functions of the chip.

can i use 100v mosfet ? e.g. use 100v to drain, and use switching step down to <50v to IC / VM ?

[TRINAMIC_BD]

Hello, unfortunately it is not possible to build a higher voltage system with the driver. This is, because the gate voltage of the high-side MOSFETs must be driven at the full voltage swing. So, the MOSFETs and TMC603 must use the same power supply voltage.