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