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BL3300 SERIES MANUAL 01/28/2013
APPENDIX A
IGBT DRIVER
The insulated gate bipolar transistor (IGBT) driver is a hybrid IC that is used in the over current detector circuit
of each BL3300 unit. Two of these drivers are used in each unit to provide signal isolation, over current
detection, and low-speed over current cutoff features. Figure 1 shows the internal parts of an IGBT driver and
its pin descriptions.
SIGNAL ISOLATION - A photo-coupler with a high isolation voltage is used for signal isolation.
OVER CURRENT DETECTION - The IGBT driver can withstand an over current of 10 µsec duration when
short circuited. An extremely fast protection circuit is used here for this reason.
LOW-SPEED OVER CURRENT CUTOFF - A low-speed cutoff circuit slowly turns off the IGBT driver in
response to an over current sensing. This feature protects the driver against damage from high voltage spikes
generated during normal drive speed cutoffs.
PIN
DESCRIPTION
1
Connected to smoothing
capacitor for reverse bias
power supply.
2
Power supply (+20 Vdc).
3
Drive output.
4
Not connected.
5
Over current detection
output.
6
Collector voltage
monitoring.
78
Not connected.
9
Power supply (0 Vdc).
10-13
Not connected.
14
Drive signal input (-).
15
Drive signal input (+).
Figure 1. IGBT Driver, Pin Description and Schematic
A-1
Summary of Contents for BL3300 Series
Page 9: ...3 BL3300 SERIES MANUAL 01 28 2013 ALL MANUAL ADDENDUMS WILL FOLLOW THIS PAGE ...
Page 15: ...9 BL3300 SERIES MANUAL 01 28 2013 SECTION 2 UNPACKING AND INSTALLATION ...
Page 17: ...11 BL3300 SERIES MANUAL 01 28 2013 FIGURE 2 2 ...
Page 20: ...14 BL3300 SERIES MANUAL 01 28 2013 ...
Page 33: ...3 PHASE POWER CHASSIS MECHNICAL OUTLINE ...
Page 34: ...BL3300 CONTROL CHASSIS MECHANICAL OUTLINE ...
Page 35: ...BL33XX SERIES SINGLE PHASE POWER CHASSIS OUTLINE DRAWING 19 0 TYP 17 TYP 7 0 MAX ...
Page 54: ...6 1 SECTION 6 PARTS LIST AND DRAWINGS f ...
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