ETC C770PS

INVERTER THYRISTOR
C770 & C770A
SPCO
77mm / 1800V / 60-80us
Disc-type ceramic PRESSPAK package
Type C770 reverse blocking thyristor is suitable for inverter applications.The silicon junction
is manufactured by the proven multi-diffusion process and utilizes the exclusive involute gate
structure.It is supplied in an industry accepted disc-type package , ready to mount using
commercially available heat dissipators and mechanical clamping hardware.
Blocking Voltage Code
C770
ON-STATE CHARACTERISTIC
C770__
On-state current , It (amperes)
MODEL
C770A__
VDRM/VRRM
-40 to +125 oC
———————————1800 Volts
C770 PN
C770 PS
1700
C770 PM
1600
C770 PE
1500
C770 PD
1400
10000
Process Maximum
Pulsed Current
Initial Tj = 125 degC
1000
Gate Drive Requirements:
open circuit voltage
internal impedance
rise time of s.s. current
minimum duration
100
0
1
2
3
4
5
6
7
8
On-state Voltage , Vt (volts)
C770
Non-Repetitive Half-Cycle
Peak Surge Current & I2t
THERMAL IMPEDANCE vs. ON-TIME
.02
30-40 V
10 Ω
0.5 - 1 µs
10 µs
Zthj-c (deg C/W)
100
Itsm (kA)
I2t (amp-sq-sec)
10.E6
.01
.001
50
5.E6
Rthj-case(dc) =
.012 degC/watt
.0001
.00001
0.1
1
10
100
1000
10000
On-Time (milliseconds)
10
1.E6
1
10
Pulse Width - milliseconds
SILICON POWER CORPORATION
175 GREAT VALLEY PARKWAY, MALVERN, PA 19355
USA
PG: 6.078 sh1 12/1/98
SPCO
C770
SELECTED RECOVERY TESTS
Turn-off Time
PARAMETER
LIMITING CHARCTERISTICS
C770
TEST
SYMBOL
CONDITIONS
Rep. peakrev.
& off-state volts
VRRM
VDRM
Tj = -40 to +125oC
up to
1800
V
Reverse & offstate current
IRRM
IDRM
Tj = 125oC
100
ma
Average on-state
current
IT(AV)
TCASE = 70oC
2100
A
Non-rep. half cycle
surge current
ITSM
60 Hz (8.3ms)
50 Hz (10 ms)
38
35
kA
On-state voltage
VTM
IT = 2000A
special C770A
TCASE = 125 oC
1.55
1.60
V
Critical rate of rise di/dt(rep)
of on-state current
Tj=125oC 60Hz
300
A/us
Critical rate of rise dv/dt
of off-state voltage
linear
Tj=125oC 60Hz
VDCRIT=67%VDRM
500
V/us
Recovery current
Tj=125oC
@ 25 A/us
200
A
VD=67%VDRM
2
us
.012
o
Turn-on delay
IRM
td
@ Tj = 125oC
LIMIT
Thermal resistance RthJ-C
UNITS
- LEM Thyristometre
Type C770
conditions for Tq <= 80us
diRdt = 25 A/us
VR = - 5V
400V/us to 67%VDRM
- Naturally Commutating Circuit
type C770A only
conditions for Tq <= 60us
It = 3000 A
diRdt = 60 A/us
80 - 100V/us initial
Vd = 1000V
- Naturally Commutating Circuit
type C770A only
conditions :
diRdt = 60 A/us
VR-appl'd=350V
snubber R=60Ω C= 1µF
IRM <= 400A
QRR <= 2000µC
S = tb/ta >= 0.33
C/watt
C770 only
C770 only
ENERGY LOSS PULSE / C770 THYRISTOR
Half sine pulses / No reverse loss
ENERGY PER PULSE
Trapezoidal Wave - no reverse voltage
di/dt = 100 A/us
pulse width
(us)
9000
Energy per Pulse (joules)
100
7000
pulse width
(us)
5000
Energy per Pulse (joules)
100
7000
9000
5000
2000
2000
1000
1000
10
750
750
10
500
500
250
1
3000
3500
4000
4500
5000
5500
6000
6500
7000
250
1
3000
Peak Current (amperes)
SIGC770A/89C
3500
4000
4500
5000
5500
6000
6500
7000
Peak Current, It (amperes)
C770TR1/91a 2/7/91
PG:6.078 Sh 2
DATE: 12/1/98
C770
MECHANICAL OUTLINE
MOUNTING PRESSPAKS TO HEAT DISSIPATORS
The following instruction is essential for maintaining low,
stable thermal and electrical resistances associated with
the PRESSPAK to heat dissipator surfaces.
1. INSPECTION OF MATING SURFACES
Check each mating surface for nicks,scratches and surface
finish.The PRESSPAK surface has a total indicator reading
TIR < .0005 inch and surface finish 32 prior to factory
electrical test in pressure fixtures. The dissipator
surface should be equally as good.The TIR of a fully
tested PRESSPAK may run higher but not exceed 0.001
inch (**) not including some minor nicks and scratches
associated with the test fixtures. Any bow created by
clamp system at assembly must keep flatness within 0.001
inch.(**)
(**) .002 inch for 77mm PRESSPAKS
2. SURFACE DEOXIDATION AND CLEANING
Although plated surfaces are recommended for aluminum and
copper heat dissipators, bare surfaces may be used if
careful attention to cleaning and treating is assured.
Plated surfaces and PRESSPAKS should be lightly sanded
with 600 grit paper, then oil or compound applied as
recommended. Unplated aluminum surfaces should be
vigorously abraided with a fine wire brush or 3M
"Scotchbrite" coated with Alcoa EJC #2 compound. The EJC
# 2 should be removed and the recommended compound
applied.
3. FINAL SURFACE TREATMENT
Apply silicone oil or a very thin layer of grease or
compound as indicated below. Rotate the PRESSPAK to
properly distribute the applied agent.
. bare copper
- use G322L or LS2037
. bare aluminum - use EJC #2 or G322L
. tin plated copper or aluminum
- preferably reapply DC550 or SF1154
- alternatively use G623 or G322L
. nickel plated aluminum - use DC550,G623 or G322L
. silver plating - not recommended
Recommended silicone oils are SF1154 or DC550
(200 centistoke)
J
CL
CL
20° ±5°
A Ø
B Ø
D
B Ø
AΦ
Φ = 4.35 in (110.5 mm)
Φ= 2.88 in (73.2 mm)
BΦ
D= 1.45 in (36.8 mm)
External Clamping Force
8000 - 9000 lbs.
35.6 - 40 kN
4. MOUNTING
Assemble with specified mounting force applied through a
self-leveling swivel connection. The diameter of the
swivel should be preferably equal but not smaller than
the poleface diameter of the PRESSPAK. Center holes on
the top and bottom of the PRESSPAK are for locating and
positioning it to identical holes anticipated at the
heat dissipator surfaces using 1/8"dia 3/16" roll pins.
NOTES:
Silicone oil DC550 (200 centistoke) is a
product of DOW CORNING; clear silicone grease
G623, yellow G322L and SF1154(200 centistoke)
GE Silicones Waterford NY; EJC# 2 from ALCOA
and black LS2037 from ARCO , 7301 Bessemer Ave.
Cleveland OH.
Limit maximum joint temperature to:
95 C using EJC #2
150 C using SF1154,DC550 or G322L
5. APPLIED MOUNTING FORCE
The selection of an appropriate commercially available
spring clamping hardware* should consider eatablishing
and maintaining the specified mounting force over the
operating temperature range and operating life of the
PRESSPAK.Thus essential ratings such as thermal resitance ,di/dt,surge current and thermal cycling will not
be impaired.
Specified forces for this product are as
follows:
7000-9000 lbs.
31.1 -40.0 kN
* Consult factory for recommendations or more detailed
instructions.
PG:6.078 Sh 3
DATE: 12/1/98