TM
Application Notes for IGBTVS
TM
Microsemi’s IGBTVS protector is intended for transients produced during load switching with a duty cycle not
to exceed .01%. For protecting against transients produced when IGBTs are applied as ac power switches and
over current protectors. Stored energy in the line and load produces damaging transient voltages during power
TM
down or fault interrupt. Microsemi’s IGBTVS transient suppressor protects from nanosecond rise transients
with surge currents to 200A, 1.5/50µs. Typical application on a 3 л power line is illustrated below.
1. CONCEPT
TVS
LINE R & L
ac POWER FROM
SERVICE ENTRY
TO
LOAD
IGBT
2. DETAILS OF SINGLE PHASE PROTECTION
CONTROL
MODULE
IGBTVSTM
LINE R & L
IGBT
IGBT
AC
LINE
IN
LOAD
GATE DRIVE
3. COMPOSITE 3 PHASE PROTECTION
Each control module contains IGBTs,
gate drive and two IGBTVSTM as
illustrated by #2 above
LINE R & L
л1
AC IN л2
л3
LINE R & L
LOAD
LINE R & L
MICROSEMI [ Microsemi ]
