Hello?
now Drive Work. but some time have BPDF, APDF
Sanghyouk,
1. Frist check datasheet "7.3.8 Configuring Predrivers" section to setup IDRIVE and TDRIVE.
2. If it is a high current or high voltage application, the low side predriver fault may assert due to noise in the system. In this application, TI recommends placing a 47 to 120-Ω resistor in series with the low side output and the gate of the low side FET. TI also recommends setting the dead time to 850 ns when adding a series resistor.
Thank you.
But I can't understand.
1. I can't find IDRIVE, TDRIVE Value.
and Q Value & RT Value are right?
2. Now I make DTIME Set 0, TBLANK Set 0 , TOFF Set 0. also samle status.
How Can I do?
Almost finish. Please help .....
Thank you~!
Sanghyouk,
1. Search "IDRVE" in the datasheet, you can find how to set the IDRIVE and TDRIVE from "Drive Register".
Q can be found in the FET's datasheet: 18nC for CSD88537. But, TR is desired rise time which is not from the FET's datasheet. It comes from your decision according to the thermal performance or EMI performance. If you don't know it, you can keep the default TDRIVEx.
2. According to equation (3), you can select DTIME is set to 0 (400 ns), TBLANK is set to 0 (1 μs), and TOFF is set to 0x14 (10 μs), then the DRV8711
will support CSD88537.
