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MCF8316A: MCF8316 questions

Scarlett Cao
Expert 4030 points
Part Number: MCF8316A

Hi team,

My customer has below questions regarding MCF8315, would you pls kindly share your response?

1. For the VM standby mode current, are these two circled ones duplicate?

For the operating mode current, are the two underline ones for 25C and the other two full temp range?

2. Do we have recommendation for DACOUT1 and DACOUT2 configuration? Which variables we use to monitor?

3. Could you help explain the buck resistor mode? Per my understand Buck circuit needs inductance to store energy during on time and discharge to output cap at off time, if using resistor, how this "buck" operates?

4. VM OVP only have two options, right?

Thank you

Scarlett

  • 0
    TI__Mastermind 23822 points

    Hi Scarlett,

    1. For this question we will get back to you. That is an error in the data sheet.

    2. DACOUT1 is 12 bit address and DACOU2 support 14 bit address. All the Algorithm variables and status variables can be mapped to the DAC outputs.

    3. Buck output can be used to load external devices with the supported range (10mA to 170mA). There is capacitor at buck output which serves as filter and the energy source. In resistor mode buck can source up to 10mA and in Inductor mode we can get up to 170mA load support.  

    How it works? Consider inductor based buck converter. During ON time current flows through inductor-> Load and Output capacitor. During this time Capacitor charges. During OFF time load receives current from Inductor and Capacitor. That means higher current is supported.

    In case of resistor there is no energy storage, but load receives current from capacitor which has got charged during ON time. But, only source of current is capacitor. That is why resistor mode can support 10mA and Inductor mode can do up to 170mA in MCF8315.

    4. Yes OVP has 32 and 20V option.

    Thanks and Best Regards,

    Venkatadri S