Direct deletion circuit schematic diagram of anti-oversaturation function

Deletion of anti-oversaturation devices: In the conventional application of UAA4002,
the base current of the switching transistor (driven switching transistor) is automatically adjusted, and the driven
power transistor is in a critical saturation state, but when the driven transistor When the operating frequency
is very low, the switching loss is negligible. At this time, the main loss is low conduction loss, so
the anti-oversaturation network can be artificially deleted, causing the driven power transistor to run in an oversaturated state
. There are two ways to achieve this purpose: one is to disconnect the UAA4002V CE pin
from the diode of the collector of the driven power transistor , and directly connect the y CE pin
to the V+ pin and then connect it to vcc through a resistor (see figure 12-28),
the disadvantage of this method is that it cannot provide fast and effective protection after the driven transistor is saturated.