Single MOSFETs transistor is necessary to have a drain to source voltage (Vdss) of 30V.Using drive voltage (10V) reduces this device's overall power consumption.
MCQ9435-TP Features
a 30V drain to source voltage (Vdss)
MCQ9435-TP Applications
There are a lot of Micro Commercial Co MCQ9435-TP applications of single MOSFETs transistors.
Lighting
Uninterruptible Power Supply
AC-DC Power Supply
Synchronous Rectification for ATX 1 Server I Telecom PSU