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SPCO
INVERTER THYRISTOR C770 & C770A
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.
C770 ON-STATE CHARACTERISTIC On-state current , It (amperes)
Blocking Voltage Code C770__ MODEL C770A__ VDRM/VRRM
10000
Process Maximum Pulsed Current Initial Tj = 125 degC 1000
-40 to +125 oC ----------------------1800 Volts C770 PN C770 PS 1700 C770 PM 1600 C770 PE 1500 C770 PD 1400
Gate Drive Requirements: open circuit voltage internal impedance rise time of s.s. current minimum duration 30-40 V 10 0.5 - 1 s 10 s
100 0 1 2 3 4 5 6 7 8
On-state Voltage , Vt (volts)
THERMAL IMPEDANCE vs. ON-TIME Zthj-c (deg C/W)
100
.01
C770 Non-Repetitive Half-Cycle Peak Surge Current & I2t
Itsm (kA) I2t (amp-sq-sec)
.02
w
10.E6
w
w
.D
.001
50
5.E6
.0001
.00001
at aS
0.1
Rthj-case(dc) = .012 degC/watt
he
1
10
100
1000
10000
On-Time (milliseconds)
10 1 10
175 GREAT VALLEY PARKWAY, MALVERN, PA 19355 USA
et 4U .c
1.E6
Pulse Width - milliseconds
SILICON POWER CORPORATION
om
PG: 6.078 sh1 12/1/98
www..com
SPCO
LIMITING CHARCTERISTICS C770 TEST SYMBOL CONDITIONS VRRM VDRM IRRM IDRM IT(AV) ITSM VTM Tj = -40 to +125oC
C770
SELECTED RECOVERY TESTS Turn-off Time
@ Tj = 125oC LIMIT up to 1800 100 UNITS V
PARAMETER Rep. peakrev. & off-state volts Reverse & offstate current Average on-state current Non-rep. half cycle surge current On-state voltage
Tj = 125oC
ma
- 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=60 C= 1F IRM <= 400A QRR <= 2000C S = tb/ta >= 0.33
TCASE = 70oC 60 Hz (8.3ms) 50 Hz (10 ms) IT = 2000A special C770A TCASE = 125 oC Tj=125oC 60Hz
2100
A
38 35 1.55 1.60
kA
V
Critical rate of rise di/dt(rep) of on-state current Critical rate of rise dv/dt of off-state voltage linear Recovery current IRM
300
A/us
Tj=125oC 60Hz VDCRIT=67%VDRM Tj=125oC @ 25 A/us VD=67%VDRM
500
V/us
200
A
Turn-on delay
td
2
us
Thermal resistance RthJ-C
.012
o
C/watt
C770 only
ENERGY LOSS PULSE / C770 THYRISTOR Half sine pulses / No reverse loss
Energy per Pulse (joules) 100
C770 only
pulse width (us) 9000 7000 5000
100
ENERGY PER PULSE Trapezoidal Wave - no reverse voltage di/dt = 100 A/us
Energy per Pulse (joules)
9000
7000
pulse width (us) 5000
2000 2000 1000
10
1000 750 500 250
10
750
500
250
1 3000
3500
4000
4500
5000
5500
6000
6500
7000
1 3000
3500
4000
4500
5000
5500
6000
6500
7000
Peak Current (amperes)
SIGC770A/89C C770TR1/91a 2/7/91
Peak Current, It (amperes)
PG:6.078 Sh 2 DATE: 12/1/98
C770
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)
MECHANICAL OUTLINE
J
C L
C L
20 5
AO BO
D
BO
A = 4.35 in (110.5 mm) B= 2.88 in (73.2 mm) 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

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