19.5 Application Examples

The High-Speed Analog Comparator with Slope Compensation DAC can be used in many power conversion applications. The outputs of the comparator module can be used to perform the following functions:

• Generate an Interrupt
• Trigger an ADC Sample and Convert Process
• Truncate the PWM Signal (Current Limit)
• Truncate the PWM Period (Current Reset)
• Extend the PWM Period (Feed Forward)
• Disable the PWM Outputs (Fault Latch)

The output of the comparator module can be used in multiple modes at the same time. For example, the comparator output can be used to generate an interrupt, have the ADC take a sample and convert it, and truncate the PWM output, all in response to a voltage being detected beyond its expected value. The SMPS analog comparator module can also be used to wake-up the system from Sleep mode or Idle mode when the analog input voltage exceeds the programmed threshold voltage. The slope compensation module allows the user to utilize built-in hardware-based slope compensation in SMPS applications. The potential applications of the comparator module are numerous and varied.

The following section describes typical applications of the comparator module in power conversion circuits.