2ED020I12FA Infineon Technologies, 2ED020I12FA Datasheet - Page 10

• Manufacturer Part Number: 2ED020I12FA
• Description: MOSFET & Power Driver ICs Dual Channel IGBT Driver IC +/-1200V
• Manufacturer: Infineon Technologies

Specifications of 2ED020I12FA

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 2ED020I12FAXT

2.2.2
The READY outputs shows the status of three internal protection features.
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It is not necessary to reset the READY signal since its state only depends on the status of the former protection signals.
2.2.3
During normal operation the internal signal transmission is monitored by a watchdog timer. If the transmission fails for a
given time, the IGBT is switched off and the READY output reports an internal error.
2.2.4
The Active Shut-Down feature ensures a safe IGBT off-state if the output chip is not connected to the power supply.
2.3
There are two possible input modes to control the IGBT. At non-inverting mode INxx+ controls the driver output while INxx-
is set to low. At inverting mode INxx- controls the driver output while INxx+ is set to high. A minimum input pulse width is
defined to filter occasional glitches.
2.4
The output driver sections uses only MOSFETs to provide a rail-to-rail output. This feature permits that tight control of gate
voltage during on-state and short circuit can be maintained as long as the drivers supply is stable. Due to the low internal
voltage drop, switching behaviour of the IGBT is predominantly governed by the gate resistor. Furthermore, it reduces the
power to be dissipated by the driver.
2.5
2.5.1
A desaturation protection ensures the protection of the IGBT at short circuit. When the DESAT voltage goes up and reaches
9V, the output is driven low. Further, the FAULT output is activated. A programmable blanking time is used to allow enough
time for IGBT saturation. Blanking time is provided by a highly precise internal current source and an external capacitor.
2.5.2
During short circuit the IGBTs gate voltage tends to rise because of the feedback via the Miller capacitance. An additional
protection circuit connected to OUTxx limits this voltage to a value slightly higher than the supply voltage. A current of
maximum 500 mA for 10us may be fed back to the supply through one of this paths. If higher currents are expected or a tighter
clamping is desired external Schottky diodes may be added.
2.6
The reset inputs have two functions.
Preliminary Datasheet
UVLO of the input chip
UVLO of the output chip after a short delay
Internal signal transmission
READY status output
Watchdog Timer
Active Shut-Down
Non-Inverting and Inverting Inputs
Driver Outputs
External Protection Features
Desaturation Protection
Short Circuit Clamping
RESET
10
Version 1.2, 2010-09-20
Functional Description
EICEDRIVER®
2ED020I12FA