TN0024

VIPer53DIP-E (see Figure 4)

9/11

Figure 5.

Measured voltage vs. time

7

VIPer53DIP-E (see Figure 4)

The VIPer53DIP-E has a state-of-the-art, enhanced current mode PWM circuit combined

with an optimized avalanche rugged high voltage MDMesh Power MOSFET in the same

of 1.7 A, a drain to source voltage rating of 620 V and is capable of 30 W for a wide voltage

range input voltage in the discontinuous flyback mode. It also has an overload delay at

TOVL controlled by an external capacitor.

The TOVL function is well suited for various length power line drop conditions which could

cause damage or overheating to the power supply. An external capacitor, C6, is used to

delay the overload protection to meet the designed HOLD-UP time specification and then

protect the power supply while entering an endless restart sequence. The VIPer53DIP-E

resumes normal switching immediately after the line voltage returns to the power supply

designed input voltage.

Time (5 ms/div)

Orange: Bulk capacitor voltage (20 V/div)