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MCT8316Z: Recommended power rating for RBK

Part Number: MCT8316Z


I have asked following question by customer. Can you please help?

 

I have a question about MCT8316ZT. MCT8316Z has the function of generating power using a step down regulator. Is there a recommended circuit when not using this feature?

 

Unless otherwise recommended, I'm thinking to use following setting for output 3.3V. Can you please share recommended power rating for RBK?

・VSEL_BK:GND

・RBK: 22Ω/±5%/**W

・CBK: 22μF/10V

 

I think almost no current flows, so I don't think it's necessary to implement a resistor with such a large power rating.

Referring to formula 5 on the datasheet, it is necessary to satisfy PRBK > (VM-VBK) × IBK.

Considering the worst case according to the specifications, IBK will be 40mA.

Then, under the above conditions

Since PRBK > (24-3.3) x 0.04 = 0.828W, is it okay to use a resistor of about 1W?