FAN73833 Fairchild Semiconductor, FAN73833 Datasheet - Page 10

• Manufacturer Part Number: FAN73833
• Description: The FAN73833 is a half-bridge gate-drive IC for driving MOSFETs and IGBTs, operating up to +600V
• Manufacturer: Fairchild Semiconductor

FAN73833 • Rev. 1.0.0
© 2008 Fairchild Semiconductor Corporation
Application Information
1. Protection Function
1.1 Under-Voltage Lockout (UVLO)
The high- and low-side drivers include under-voltage
lockout (UVLO) protection circuitry for each channel that
monitors the supply voltage (V
tor voltage (V
prevent malfunction when V
the specified threshold voltage. The UVLO hysteresis
prevent chattering during power supply transitions.
1.2 Shoot-Through Prevention Function
The shoot-through prevention circuitry monitors the high-
and low-side control inputs. It can be designed to prevent
outputs of high and low side from turning on at same
time, as shown Figure 23 and 24.
Figure 23. Waveforms for Shoot-Through Prevention
Figure 24. Waveforms for Shoot-Through Prevention
HIN
LIN
HO
LO
HIN
LIN
HO
LO
BS
) independently. It can be designed to
DD
After DT
Shoot-Through Prevent
DD
and V
) and bootstrap capaci-
After DT
Shoot-Through Prevent
BS
are lower than
After DT
10
2. Switching Time Diagram
LIN
HIN
LO
HO
Figure 25. Switching Time Definition
t
OFF
50%
More than
dead time
90%
t
ON
50%
10%
t
More than
dead time
OFF
50%
90%
t
50%
ON
10%
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t
OFF
50%
90%