2002 Fairchild Semiconductor Corporation
Application Note Rev. A1
HVIC/IGBT Half-Bridge Converter
Evaluation Circuit
The HVIC high voltage integrated circuit is designed to drive
n-channel IGBTs or MOSFETs in a half-bridge configuration
up to 500V
DC
. Power supply and motor control inverters can
be configured for voltages up to 230V
AC
using the HVIC,
IGBTs and a few other components.
A few precautions should be taken in using the circuit. Lead
lengths between the external power circuit (including gate
and pilot leads), the 15V bypass capacitor (C
DD
), the boot-
strap diode (D
F
) and capacitor (C
F
) and the HVIC should be
minimized.
The basic components required to evaluate the features of
the SP601 are shown in the simplified schematic. The rec-
ommended load is largely resistive so that the largest current
component will flow through the IGBTs, IGT1 and IGT2.
The flyback diodes, D1 and D2, rated 8A, will carry a much
smaller flyback current component. A small amount of load
inductance will cause the switching waveforms to simulate
the conditions which would normally be observed with motor
or transformer loads, while limiting the current carried by the
lower rated flyback diodes in this circuit.
The values for R
PUa
, R
PUb
, etc., have been chosen to result
in overcurrent trip at approximately 25Apk. At this level of
current, heat sinking for the IGTs and flyback diodes is
required. The series resistance of the upper and lower pilot
resistor dividers would be approximately 1K
; the divider
ratio should cause 0.1V at the tap at the desired trip current.
When first energizing your evaluation circuit, begin with a
reduced bus voltage of about 20V
DC
to 30V
DC
to verify
proper circuit operation before proceeding to higher voltages.
More specific information can be found in File Number 2428
and File Number 2429 Half-Bridge 500V
DC
Driver data
sheets and in the Application Note, AN-8829.1.
Simplified Schematic
HVIC - Fairchild Part # SP601 (Formerly
GS601)
D1, 2 - Fairchild Part #
RUR860
R
PUa
, R
PLa
- 910
, 1.8W
C1 - 0.1
F, 600V
DC
IGT1, 2 - Fairchild Part # HGTA24N60D1C
D
F
- Fairchild Part # A114M
R
PUb
, R
PLb
- 68
, 1.8W
R
L
- 20
, 3KW 13 -50
C
F
R
PBa
VBS
D1U
TRIPL
G1U
G2U
PHASE
TRIPU
CL2
D1L
G1L
G2L
CL1
V
OUT
V
DF
V
BIAS
UP/DOWN
ENABLE
V
DD
V
SS
HVIC
15V
PULSE
GEN
+15V
FAULT
FAULT
LED
+15V
0.22
R
PUb
R
PLa
R
PLb
IGT1
D1
1mH
L
L
IGT2
R
L
3KW
20
D2
C1
100
50
100
50
25
VDC
V
LINK
3 500V
DC
V
LINK
2
D
F
C
DD
10
F
V
LINK
2
+
+
+
+
Application Note
May 1992 AN-7508
Author: George Danz
/Title
AN75
8)
Sub-
ect
HVIC
IGBT
alf-
ridge
on-
erter
valu-
tion
ir-
uit)
Autho
()
Key-
ords
)
Cre-
tor ()
DOC
NFO
df-
ark
Page-
ode
Use-
ut-
ine
DOC-
IEW
df-
ark
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NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD
DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT
OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT
RIGHTS, NOR THE RIGHTS OF OTHERS.
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FAIRCHILDS PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
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As used herein:
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systems which, (a) are intended for surgical implant into
the body, or (b) support or sustain life, or (c) whose
failure to perform when properly used in accordance
with instructions for use provided in the labeling, can be
reasonably expected to result in significant injury to the
user.
2. A critical component is any component of a life
support device or system whose failure to perform can
be reasonably expected to cause the failure of the life
support device or system, or to affect its safety or
effectiveness.
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Definition
Advance Information
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No Identification Needed
Obsolete
This datasheet contains the design specifications for
product development. Specifications may change in
any manner without notice.
This datasheet contains preliminary data, and
supplementary data will be published at a later date.
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changes at any time without notice in order to improve
design.
This datasheet contains final specifications. Fairchild
Semiconductor reserves the right to make changes at
any time without notice in order to improve design.
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