JAJSOD0A April 2022 – July 2022 TPS22811
PRODUCTION DATA
In the case of a short-circuit or device turn off during steady-state when the device interrupts current flow, the input inductance generates a positive voltage spike on the input, and the output inductance generates a negative voltage spike on the output. The peak amplitude of voltage spikes (transients) is dependent on the value of inductance in series to the input or output of the device. Such transients can exceed the absolute maximum ratings of the device if steps are not taken to address the issue. Typical methods for addressing transients include:
Use Equation 15 to estimate the approximate value of input capacitance:
where
Figure 9-1 shows the circuit implementation with optional protection components.