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Motor Drivers Forum
I am using DRV8402 Dual Full Bridge PWM Motor Driver............so Please help me that this IC have inbuild Dead time circuit....
I cant understand from datasheet....... I have to External Dead time circuit or IC have it
Thank you, Please help
Yes, dead time is built in on the DRV8402. It is specified in the tabular data.
However, please look at the DRV8432 for new designs.
Motor Drive Application Manager
can u tell me that what is max. voltage for pwm signal which we can give to DRV8402? Is it +12V?
please help..... I need to buy heat sink for DRV8402 and DRV8432....so where I will find it
Maximum input voltage for PWM pins is specified in the datasheet under the "ABSOLUTE MAXIMUM" table in the front.
PWM_X to GND –0.3 V to 4.2 V
thank u so much
but link u have send is not opening
For the DRV8432 heatsink, we start with an extrusion from a company called AAVID. We then send it to a machine shop to cut it to the length we need. Unfortunately, we use a local machine shop that does not stock the heat sinks for order. We are still searching for a good partner to send customers to.
To answer your question, the thermal resistance is approximately 4.4C/W. I have attached a datasheet of a catalog heatsink from AAVID with dimensions that match the heatsink on the DRV8432EVM.
It is also important to note that a lot of catalog heatsinks are black anodized. If they go with a heatsink like this, they need to machine the surface of the HS where is contacts the thermal pad on the IC. Essentially scraping off the coating and exposing the metal. This allows an electrical connection to our device when the HS is grounded to the board. This electrical connection helps to quiet the substrate of the device when load currents are high.
Thanks...I will let you know if a specific opportunity comes up and we need your help.
Thanks for reply Ryan
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