ACST8-8CG-TR

ACST8 ® ASD™ (AC Switch Family) OVER VOLTAGE PROTECTED AC POWER SWITCH MAIN APPLICATIONS ■ ■ ■ AC static switching in appliance & industrial control systems Washing machine with bi-rotational induction motor drive Induction motor drive for: - refrigerator / freezer compressor - air conditioning compressor OUT G TO-220FPAB ACST8-8CFP FEATURES ■ VDRM /VRRM = +/- 800V ■ Avalanche controlled device IT(RMS) = 8A with TCASE = 90 °C ■ ■ ■ ■ G OUT COM OUT COM TO-220AB ACST8-8CT OUT High noise immunity: static dV/dt > 750 V/µs Gate triggering current : IGT < 30 mA G Snubberless turn off commutation: (dI/dt)c > 4.5A/ms COM 2 D PAK ACST8-8CG BENEFITS ■ ■ ■ ■ Enables equipment to meet EN61000-4-5 standard High off-state reliability with planar technology Need no external overvoltage protection Reduces the power component count Table 1: Order Codes Part Number Marking ACST8-8CFP ACST8-8CT DESCRIPTION The ACST8-8C belongs to the AC power switch family built around the ASDTM technology. This high performance device is adapted to home appliances or industrial systems and drives an induction motor up to 8A. This ACST switch embeds a triac structure with a high voltage clamping device to absorb the inductive turn off energy and withstand line transients such as those described in the IEC61000-4-5 standards. ACST88C ACST8-8CG Figure 1: Functional Diagram OUT G COM TM: ASD is a trademark of STMicroelectronics. November 2004 REV. 6 1/10 ACST8 Table 2: Absolute Ratings (limiting values) Symbol IT(RMS) Parameter TO-220FPAB RMS on-state current full cycle sine TO-220AB / wave 50 to 60 Hz D2PAK Tcase = 90°C Value 8 Tcase = 100°C 8 tp = 20ms tp = 16.7ms tp = 10ms 80 85 35 A A A 2s Rate period > 1mn 100 A/µs note 1 2 - 40 to + 150 - 40 to + 125 260 kV °C °C °C Non repetitive surge peak on-state current Tj initial = 25°C, full cycle sine wave ITSM I2t Thermal constraint for fuse selection Non repetitive on-state current critical rate of rise IG = 10mA (tr < 100ns) Non repetitive line peak pulse voltage Storage temperature range Operating junction temperature range Maximum lead soldering temperature during 10s dI/dt VPP Tstg Tj Tl Unit A Note 1: according to test described by IEC61000-4-5 standard & figure A. Table 3: Gate Characteristics (maximum values) Symbol Parameter Average gate power dissipation PG (AV) PGM Peak gate power dissipation (tp = 20µs) Peak gate current (tp = 20µs) IGM Value 0.1 10 1 Unit W W A Table 4: Thermal Resistance Symbol Value Unit 60 °C/W 45 3.5 °C/W °C/W 2.5 °C/W Rth(j-a) Rth(j-a) Rth(j-c) Rth(j-c) Parameter TO-220FPAB Junction to ambient TO-220AB 2 Junction to ambien (soldered on 1 cm copper pad) D2PAK Junction to case for full cycle sine wave conduction TO-220FPAB TO-220AB Junction to case for full cycle sine wave conduction 2 D PAK Table 5: Parameter Description Parameter Symbol IGT Gate triggering current VGT Gate triggering voltage VGD Non triggering voltage IH Holding current IL Latching current VTM On state voltage VT0 On state characteristic threshold voltage Rd On state characteristic dynamic resistance IDRM / IRRM dV/dt (dI/dt)c VCL 2/10 Parameter description Forward or reverse leakage current Static pin OUT voltage rise Turn off current rate of decay Avalanche voltage at turn off ACST8 Table 6: Electrical Characteristics per Switch For either positive or negative polary of pin OUT voltage respect to pin COM voltage Symbol VDRM/ VRRM Test conditions Repetitive peak off-state voltage Values Unit MAX. 800 V IGT VOUT = 12V (DC) RL = 33Ω Tj = 25°C MAX. 30 mA VGT VOUT = 12V (DC) RL = 33Ω Tj = 25°C MAX. 1.5 V VGD VOUT = VDRM RL = 3.3kΩ Tj = 125°C MIN. 0.2 V IH IOUT = 100mA Gate open Tj = 25°C MAX. 40 mA IL IG = 20mA Tj = 25°C MAX. 70 mA VTM IOUT = 11A Tj = 25°C MAX. 1.5 V VT0 Tj = 125°C MAX. 0.95 V Rd Tj = 125°C MAX. 50 mΩ Tj = 25°C MAX. 10 µA Tj = 125°C MAX. 1 mA Tj = 125°C MIN. 750 V/µs Tj = 125°C MIN. 4.5 A/ms Tj = 25°C TYP. 1200 V IDRM / IRRM VOUT = VDRM VOUT = VRRM dV/dt VOUT = 550V (dI/dt)c VCL tp = 380µs gate open Without snubber ICL = 1mA tp = 1ms 1. AC LINE SWITCH BASIC APPLICATION The ACST8-8C device is especially designed to drive medium power induction motors in washing machines, refrigerators, dish washers, and tumble dryers. Pin COM Pin G Pin OUT : Common drive reference, to be connected to the power line neutral : Switch Gate input to be connected to the controller : Switch Output to be connected to the load When driven from a low voltage controller, the ACST switch is triggered with a negative gate current flowing out of the gate pin G. It can be driven by the controller through a resistor as shown on the typical application diagram. In appliance systems, the ACST8-8C switch intends to drive medium power load in ON / OFF full cycle or phase angle control mode. Thanks to its thermal and turn-off commutation characteristics, the ACST8-8C switch is able to drive an inductive load up to 8A without a turn-off aid snubber circuit. In washing machine or drier appliances, the tumble rotates in both directions. When using bidirectional phase shift induction motor, two switches are connected on each side of the phase shift capacitor: in steady-state operation, one switch only conducts energising the coils and defining the tumble direction. 3/10 ACST8 Figure 2: Typical Application Diagram OUT G COM CONTROL UNIT 2. ROBUSTNESS AGAINST FAST CAPACITOR DISCHARGE When parasitic transients or controller mis-operation occur, the blocked switch may turn on by spurious switch firing. Since the phase shift capacitor is charged, its energy is instantaneously dissipated through the two ACSTs which can be destroyed. To prevent such a failure, a resistive inductive circuit R-L is added in series with the phase shift capacitor. The dI/dt depends on the maximal voltage Vmax of the phase shift capacitor (700V on 240V mains applications), and on the inductance L: v max dl ---- = ----------- L dt The total switch turn on di/dt is the sum of the di/dt created by any RC noise suppressor discharge and the dI/dt created by the motor capacitor discharge. Since the maximal dI/dt capability at turn-on of the ACST8 is 100A/µs, the motor capacitor di/dt is assumed to be less than 50A/µs; therefore, the inductance should be 14µH. The resistor R limits the surge current through the ACST8 during the capacitor discharge according to the specified curve ITSM = f (tp) as shown in figure 11 (to be issued), and 1.2Ω is low enough to limit the resistor dissipation (usually less than 1 W). Finally both the 14µH inductance and the 1.2Ω resistance provide a safety margin of two on the surge current ITSM described in figure 11. M VAC C L R 700V T1 ON 4/10 T2 Fast capacitor discharge when one ACST switch turns on (T2) and the motor runs (T1 ON). ACST8 3. AC LINE TRANSIENT VOLTAGE RUGGEDNESS The ACST8-8C switch is able to safely withstand the AC line transient voltages either by clamping the low energy spikes or by breaking over under high energy shocks. The test circuit in figure 3 is representative of the ACST application and is used to test the ACST switch according to the IEC61000-4-5 standard conditions. Thanks to the load impedance, the ACST switch withstands voltage spikes up to 2 kV above the peak line voltage by breaking over safely. Such non repetitive testing can be done 10 times on each AC line voltage polarity. Figure 3: Overvoltage ruggedness test circuit for resistive and inductive loads according to IEC61000-4-5 standard R = 47Ω, L = 10µH & VPP = 2kV L R OUT SURGE VOLTAGE AC LINE & GENERATOR VAC + V PP G COM Figure 4: Maximum power dissipation versus RMS on-state current Figure 5: RMS on-state current versus case temperature P(W) IT(RMS)(A) 11 9 α=180° 10 2 TO-220AB/D PAK 8 9 7 TO-220FPAB 8 6 7 6 5 5 4 4 3 3 180° 2 1 2 α α 0 1 2 3 α=180° 1 IT(RMS)(A) TC(°C) 0 0 4 5 6 7 8 Figure 6: RMS on-state current versus ambient temperature 0 25 50 75 100 125 Figure 7: Relative variation of thermal impedance versus pulse duration (TO-220FPAB) K=[Zth/Rth] IT(RMS)(A) 1.E+00 3.0 2.5 α=180° Printed circuit board FR4 Natural convection D2PAK Zth(j-c) 1.E-01 2.0 Zth(j-a) 1.5 TO-220FPAB/TO-220AB 1.0 1.E-02 0.5 Tamb(°C) 0.0 0 25 50 75 TO-220FPAB tp(°C) 100 125 1.E-03 1.E-03 1.E-02 1.E-01 1.E+00 1.E+01 1.E+02 1.E+03 5/10 ACST8 Figure 8: Relative variation of thermal impedance versus pulse duration (TO-220AB / D2PAK) Figure 9: On-state characteristics (maximum values) Iout(A) K=[Zth/Rth] 1.E+00 100 Zth(j-c) Tj=25°C Tj=125°C 1.E-01 10 Zth(j-a) Tj max. : Vto = 0.95 V Rd = 50 mΩ 2 TO-220AB/D PAK tp(°C) tp(°C) 1.E-02 1 1.E-03 1.E-02 1.E-01 1.E+00 1.E+01 1.E+02 1.E+03 Figure 10: Surge peak on-state current versus number of cycles 0 1 2 3 4 5 6 Figure 11: Non repetitive surge peak on-state current for a sinusoidal pulse with width tp < 10ms, and corresponding value of I2t ITSM(A) 2 2 ITSM(A), I t (A s) 90 1000 Tj initial=25°C 80 70 t=20ms Non repetitive Tj initial=25°C dI/dt limitation: 100A/µs 60 ITSM 50 100 40 Repetitive Tc=90°C 30 I2t 20 10 Number of cycles tp(ms) 0 10 1 10 100 1000 Figure 12: Relative variation of gate trigger current, holding current and latching current versus junction temperature (typical values) 0.01 1.00 10.00 Figure 13: Relative variation of critical rate of decrease of main current versus reapplied dV/ dt (typical values) IGT, IH,IL[Tj/IGT, IH, IL[Tj=25°C] 3.0 0.10 (dI/dt)c[(dV/dt)c] / Specified (dI/dt)c 5 2.5 4 IGT & IH 2.0 3 1.5 2 IL 1.0 1 0.5 Tj(°C) 0.0 dV/dt(V/µs) 0 -40 -30 -20 -10 6/10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 0.1 1.0 10.0 100.0 ACST8 Figure 14: Relative variation of critical rate of decrease of main current versus junction temperature Figure 15: Relative variation of static dV/dt versus junction temperature (dI/dt)c[Tj] / (dI/dt)c[Tj=125°C] 3.5 6 dV/dt[Tj] / dV/dt[Tj=125°C] Vout=550V 3.0 5 2.5 4 2.0 3 1.5 2 1.0 1 0.5 Tj(°C) Tj(°C) 0.0 0 0 25 50 75 100 125 0 25 50 75 100 125 Figure 16: Surge peak on-state current versus number of cycles Rth(j-a)(°C/W) 80 70 60 50 40 30 20 10 S(Cu)(cm²) 0 0 5 10 15 20 25 30 35 40 Figure 17: Ordering Information Scheme ACS T 8 - 8 C FP AC Switch Topology T = Triac RMS on-state current 8 = 8A Repetitive peak off-state voltage 8 = 800V Triggering gate current C = 30mA Package FP = TO-220FPAB CT = TO-220AB CG = D2PAK 7/10 ACST8 Figure 18: TO-220AB Package Mechanical Data REF. A H2 Dia C L5 L7 L6 L2 F2 F1 D L9 L4 F M G1 E G A B D E F F1 F2 G G1 H2 L2 L4 L5 L6 L7 L9 M Diam. DIMENSIONS Millimeters Inches Min. Max. Min. Max. 4.40 4.60 0.173 0.181 1.23 1.32 0.048 0.051 2.40 2.72 0.094 0.107 0.49 0.70 0.019 0.027 0.61 0.88 0.024 0.034 1.14 1.70 0.044 0.066 1.14 1.70 0.044 0.066 4.95 5.15 0.194 0.202 2.40 2.70 0.094 0.106 10 10.40 0.393 0.409 16.4 typ. 0.645 typ. 13 14 0.511 0.551 2.65 2.95 0.104 0.116 15.25 15.75 0.600 0.620 6.20 6.60 0.244 0.259 3.50 3.93 0.137 0.154 2.6 typ. 0.102 typ. 3.75 3.85 0.147 0.151 Figure 19: TO-220FPAB Package Mechanical Data REF. A B H Dia L6 L2 L7 L3 L5 D F1 L4 F2 F G1 G 8/10 E A B D E F F1 F2 G G1 H L2 L3 L4 L5 L6 L7 Dia. DIMENSIONS Millimeters Inches Min. Max. Min. Max. 4.4 4.6 0.173 0.181 2.5 2.7 0.098 0.106 2.5 2.75 0.098 0.108 0.45 0.70 0.018 0.027 0.75 1 0.030 0.039 1.15 1.70 0.045 0.067 1.15 1.70 0.045 0.067 4.95 5.20 0.195 0.205 2.4 2.7 0.094 0.106 10 10.4 0.393 0.409 16 Typ. 0.63 Typ. 28.6 30.6 1.126 1.205 9.8 10.6 0.386 0.417 2.9 3.6 0.114 0.142 15.9 16.4 0.626 0.646 9.00 9.30 0.354 0.366 3.00 3.20 0.118 0.126 ACST8 Figure 20: D2PAK Package Mechanical Data REF. A E C2 L2 D L L3 A1 B2 R C B G A2 M * V2 * FLAT ZONE NO LESSTHAN 2mm A A1 A2 B B2 C C2 D E G L L2 L3 M R DIMENSIONS Millimeters Inches Min. Max. Min. Max. 4.40 4.60 0.173 0.181 2.49 2.69 0.098 0.106 0.03 0.23 0.001 0.009 0.70 0.93 0.027 0.037 1.14 1.70 0.045 0.067 0.45 0.60 0.017 0.024 1.23 1.36 0.048 0.054 8.95 9.35 0.352 0.368 10.00 10.40 0.393 0.409 4.88 5.28 0.192 0.208 15.00 15.85 0.590 0.624 1.27 1.40 0.050 0.055 1.40 1.75 0.055 0.069 2.40 3.20 0.094 0.126 0.40 typ. 0.016 typ. Figure 21: Foot Print Dimensions (in millimeters) 16.90 10.30 5.08 1.30 3.70 8.90 Table 7: Ordering Information Part Number Marking ACST8-8CFP ACST8-8CT ACST8-8CG ACST88C ACST8-8CG-TR ■ Package Weight Base qty Delivery mode TO-220FPAB 2.4 g 50 Tube TO-220AB 2.3 g 50 Tube D2PAK 1.5 g 50 Tube 500 Tape & reel Epoxy meets UL94, V0 Table 8: Revision History Date Revision Description of Changes Jan-2002 4B 08-Nov-2004 5 TO-220AB and D2PAK packages added. 24-Nov-2004 6 Table 6 page 3 : IGT parameter added Last update. 9/10 ACST8 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners © 2004 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com 10/10