Original question:
Hello,
I'm currently using a DAC53202 and controlling it with SPI.
I want to control Buck's output voltage slew rate by connecting the output of DAC53202's OUT1 to LM3243's VCON.
I would like to change the Rising time just once from Low to High by adjusting the DAC53202 Out1 Slew rate. Please tell me which resistor I should control.
Triangle or Sawtooth are not the functions I want because they repeat rising and falling.
Hi Sunghwan,
To trigger the transition from low to high (or high to low) you use the TRIG-MAR-HI-1 (and TRIG-MAR-LO-1) fields in the COMMON-DAC-TRIG register. The TRIG-MAR-HI-1 trigger will cause the output to transition from the code stored in the DAC-1-MARGIN-LOW register to the code stored in the DAC-1-MARGIN-HIGH based on the slew rate configured in the DAC-1-FUNC-CONFIG register.
Make sure the SLEW-RATE-1 and CODE-STEP-1 fields are configured in the DAC-1-FUNC-CONFIG register. The FUNC-CONFIG-1 field is "don't care" unless you trigger the function generator to start in the COMMON-DAC-TRIG register.
Set the high and low DAC codes in the DAC-1-MARGIN-HIGH and DAC-1-MARGIN-LOW registers:
Please let me know if you have any more questions
Best,
Katlynne Jones
