Introduction to Thyristor Devices Outline SIDAC Applications – Gas Ignition Applications Operation - High Energy SIDAC – HID Lighting Applications Operation – High Pressure Sodium (Std SIDAC) Operation - Metal Halide (MP SIDAC) SCR Applications AC Power Applications – Triac Operation (Quadrants & Variants) – Triac Packages (High Temp) – Triac Circuits Cascade Heater Control Isolated Solid-State Relay – High Power 2 x SCR Operation (1.414 X Rating) – Engine System Voltage Regulator High Power SCR – Animal Control Fencer 2 Version01_100407 SIDAC Gas Ignition Applications 3 Version01_100407 SIDAC Gas Ignition Circuit Gas Igniter Control Sidac for Gas Igniter Circuit Littelfuse High Energy SIDAC devices offer solid-state performance and reliability at GDT energy levels: • Precision Switching Voltage Charge Fire • No Aging Effects • Lower Power Dissipation SIDAC K2200EH Nominal Switching Voltage Single Chip Package E=TO-92 G=DO-15 S=SMB High Energy SIDAC 4 Version01_100407 SIDAC HID Lighting Applications 5 Version01_100407 SIDAC HID Lighting Ignition High Pressure Sodium Lighting – Standard SIDAC SIDAC = Voltage Controlled Switch Charge Fire Std SIDAC Starter Circuit Must Produce 1500V Pulse Every AC Half Cycle to Strike HPS Lamp K2200E SIDAC Nominal Switching Standard Voltage SIDAC Package E=TO-92 G=DO-15 S=SMB 6 Version01_100407 SIDAC HID Lighting Ignition Metal Halide Lighting – Multi-Pulse SIDAC Ballast The Multi-Pulse SIDAC Starter Circuit Must Produce Three 4000V Pulses Every AC Half Cycle to Strike Metal Halide Lamp Package K2401G SIDAC G=DO-15 Nominal MultiSwitching Special Note: Pulse Voltage For Combination Starters SIDAC Multi-Pulse SIDACs may also be used in High Pressure Sodium Applications Igniter unit Lamp 7 Version01_100407 Outline SIDAC Applications AC Power Applications – Gas Ignition Applications Operation - High Energy SIDAC – HID Lighting Applications Operation – High Pressure Sodium (Std SIDAC) Operation - Metal Halide (MP SIDAC) SCR Applications – Triac Operation (Quadrants & Variants) – Triac Packages (High Temp) – Triac Circuits Cascade Heater Control Isolated Solid-State Relay – High Power 2 x SCR Operation (1.414 X Rating) – Engine System Voltage Regulator High Power SCR – Animal Control Fencer 8 Version01_100407 SCR Applications Engine System Voltage Regulator Non-Automotive Gasoline or Diesel Engines > 500cc 9 Version01_100407 ∿ Battery Charge Control Circuit Starter & Electrical System SCR = Silicon Controlled Rectifier 1. Blocks all current when off. 2. Conducts forward current when turned on by injecting gate current. 3. Never conducts reverse current. - Engine Alternator Battery + SCR Engine System Voltage Regulator SCR Part Number Breakdown S6055R SCR ·l· Voltage Rating 10 Current Rating Package K: TO-218AC (Isolated) M: TO-218AC J: TO-218X (Isolated) W: TO-218X R:TO-220 N: D2 Pak 10 Version01_100407 SCR High Voltage Supply Animal Control Fencer Timing and Triggering Circuit for Slow Pulsing Rate Features & Benefits Efficient HV pulsing supply Reliable solid-state components Easy method to control energy output by capacitor selection High dv/dt capability for noise immunity Wide range of SCR ratings and packages 11 Version01_100407 Outline SIDAC Applications AC Power Applications – Gas Ignition Applications Operation - High Energy SIDAC – HID Lighting Applications Operation – High Pressure Sodium (Std SIDAC) Operation - Metal Halide (MP SIDAC) SCR Applications – Triac Operation (Quadrants & Variants) – Triac Packages (High Temp) – Triac Circuits Cascade Heater Control Isolated Solid-State Relay – High Power 2 x SCR Operation (1.414 X Rating) – Engine System Voltage Regulator High Power SCR – Animal Control Fencer 12 Version01_100407 AC Power Applications Electric Heaters Water Heaters Machine Tools Industrial Battery Chargers Compressors Welders 13 Version01_100407 Triac Operation Triac Solid-state On/Off Control Variable Power Control (Phase Control) Use on Resistive Loads (Heaters, Lights, etc.) Available to 125ºC Alternistor Triac Notice: Triacs operation use only two quadrants Triac Variant Excellent Commutating No Quadrant IV Operation Use on Inductive Loads (Motors, Coils, etc.) Available to 150ºC 14 Version01_100407 Triac Part Numbers and Packages Triac Part Numbering Fastpak HQ: 150ºC Alternistor 7: 100mA TO-218X TO-218AC 15: 15A 16: 16A 25: 25A 30: 30A 35: 35A 40: 40A TO-220AB TO-263 15 Version01_100407 Power Triac Driven by Low Current Triac in Heater Control Circuit Features & Benefits Q1 operates in quadrants 1 and 4 Q2 operates in quadrants 1 and 3 All Solid-State PIC Micro Processor controlled (see App Note AN1003 for more details) Design Constraints • Controller ground is the AC power neutral line. • Controller can only output positive signals. 16 Version01_100407 Isolated Solid State Switch or Relay Control Circuit Opto Coupler Features & Benefits Power Triac driven by Opto Coupler Opto Coupler is isolated switch for AC line gate supply Power Triac operates in quadrants 1 and 3 All Solid-State Opto Coupler can be randon turn-on or zero crossing turn-on type (see App Note AN1007 for more details) 17 Version01_100407 High Power Anti-Parallel SCR Circuit 20HP Motor Tachometer Signal 240VAC ∿ Motor Speed Control Circuit Features & Benefits Low Part Count All Solid-State No Moving Parts Immune to Commutation Issues High Current Rating Possible Synchronized Soft Start Current Rating = 1.4 x SCR Current Rating (e.g. 70A SCR 98A Current Rating) Opto-Isolated Triac 18 Version01_100407 Introduction to Thyristor Devices Thank You! 19 Version01_100407