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October 2006 Rev 4 1/21
AN1944
Application note
Developing IGBT applications using an
TD350 advanced IGBT driver
Introduction
The TD350 is an advanced Insulated Gate Bipolar Transistor (IGBT) driver with integrated
control and protection functions. The TD350 is especially adapted for driving 1200V IGBTs
with current ratings from 15 to 75A in Ecopak-like modules.
Main features are:
● Minimum1.2A sink / 0.75A source peak output current over full temperature range
(-20°C to 125°C)
● Desaturation protection with adjustable blanking time and fault status signal
● Active Miller clamp function to reduce the risk of induced turn-on in high dV/dt
conditions without the need of negative gate drive in most cases
● Optional 2-step turn-off sequence to reduce over-voltage in case of over-current or
short-circuit event to protect IGBT and avoid RBSOA problems
● Input stage compatible with both optocouplers and pulse transformers
Applications include a three-phase full-bridge inverter used for motor speed control and
UPS systems.
TD350 in 1200V 3-phase inverter application
IGBT modules
TD350
TD350
TD350
TD350
TD350
TD350
Load
HV DC
GND
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