Notification 212 - Maximum duty cycle (DMAX) limit has been exceeded

CATEGORY

ISSUE / RESULT

FIX / REFERENCE(S)

Failure

Maximum duty cycle (DMAX) is above the
PI Component  device limit.

The power supply may not deliver maximum output power, at the worst-case condition of lowest overall efficiency, which includes low-line AC input voltage and the highest rated ambient temperature.

• Increase the size of the bulk capacitance (CIN), which will increase the minimum input voltage (VMIN).

• Decrease the reflected output voltage (VOR).

• If the design is intended to operate in the discontinuous conduction mode, increase the current waveform parameter
  ( KP).

• Decrease the power supply’s output power requirements (PO).

• Increase the minimum AC input voltage (VACMIN).

• See the TOP232-234  and TOP242-250  data sheets for the value of DMAX.