DRV8874: Continuous Current

Hello Cedrick,

I am happy to help out. It is my understanding that you are asking if the device can operate in 100C ambient temperature conditions with a continuous 2A current? If this is the case the answer depends almost entirely on the design of the PCB and supply voltage. The max temperature at the junction that the device can experience is 150C, so you would need to refer to section 8.2.1.2.2 Power Dissipation and Output Current Capability in the data sheet to calculate if the power dissipated is enough to keep the chip under the necessary junction temperature. To perform these calculations you would need the following information:

-Supply Voltage: very important for power dissipation calculations. 

-Switching Frequency

-Ivm active current specifications (which I believe you already stated as 2A)

-Irms average output current

-Output rise and fall times.

-Surface area of copper top layer of PCB

-Number of layers on the PCB 4vs2

-Copper type, 1oz vs 2oz. 

Under the right conditions the 8874 can provide up to 6A Peak current capacity, though due to the high ambient temperature design considerations must be taken to ensure that the device will not go into overtemperature shutdown. 

I will be happy to assist with calculations once we have the necessary data. 

Best,

Pedro Arango Ramirez