ACST4 Series. ASD AC Switch Family AC POWER SWITCH

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Meryl Collins
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1 ASD AC Switch Family ACST4 Series AC POWER SWITCH MAIN APPLICATIONS AC static switching in appliance control systems Drive of low power high inductive or resistive loads like - spray pump in dishwashers - fan in air-conditioners FEATURES Blocking voltage : V DRM /V RRM = +/-700V Avalanche controlled : V CL typ = 1100 V Nominal conducting current : I T(RMS) =4A High surge current capability: 30A for 20ms full wave ate triggering current : I T < 10 ma or 25mA Switch integrated driver High noise immunity : static dv/dt >500V/µs BENEFITS Enables equipment to meet IEC High off-state reliability with planar technology No external overvoltage protection needed Reduces the power component factor Interfaces directly with the microcontroller Direct interface with the microcontroller for the ACST4-7S (I T < 10mA) ACST4-7SB/CB FUNCTIONAL DIARAM ACST4-7SFP/CFP DESCRIPTION The ACST4 belongs to the AC power switch family built around the ASD technology. This high performance device is adapted to home appliances or inductrial systems and drives loads up to 4 A. The ACS 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 IEC standards. January Ed: 3A 1/9

2 ABSOLUTE RATINS (limiting values) For either positive or negative polarity of pin voltage in respect to pin voltage Symbol Parameter Value Unit V DRM /V RRM Repetitive peak off-state voltage Tj = -10 C 700 V I T(RMS) RMS on-state current full cycle sine Tc = 110 C 4 A wave 50 to 60 Hz Tc = 100 C I TSM Non repetitive surge peak on-state current F =50 Hz 30 A Tj initial = 25 C, full cycle sine wave F =60 Hz 33 A I 2 t Fusing capability tp = 10ms 6.4 A²s di/dt Repetitive on-state current critical rate Tj = 125 C F = 120 Hz 50 A/µs of rise I = 10mA (tr < 100ns) V PP Non repetitive line peak pulse voltage note 1 2 kv Tstg Storage temperature range - 40 to C Tj Operating junction temperature range - 30 to C Tl Maximum lead soldering temperature during 10s 260 C Note 1: according to test described by IEC standard & Figure B. ATE CHARACTERISTICS (maximum values) Symbol Parameter Value Unit P (AV) Average gate power dissipation 0.1 W P M Peak gate power dissipation (tp = 20µs) 10 A I M Peak gate current (tp = 20µs) 1 V THERMAL RESISTANCES Symbol Parameter Value Unit Rth (j-a) Junction to ambient S = 0.5cm² 70 C/W 60 C/W Rth (j-l) Junction to case for full cycle sine wave 2.6 C/W conduction 4.6 C/W S = Copper surface under Tab 2/9

3 PARAMETER DESCRIPTION Parameter Symbol Parameter description I T V T V D I H I L V TM V TO Rd I DRM /I RRM dv/dt (dv/dt)c (di/dt)c V CL I CL Triggering gate current Triggering gate voltage Non-triggering gate voltage Holding current Latching current Peak on-state voltage drop On state threshold voltage On state dynamic resistance Maximum forward or reverse leakage current Critical rate of rise of off-state voltage Critical rate of rise of commutating off-state voltage Critical rate of decrease of commutating on-state current Clamping voltage Clamping current ELECTRICAL CHARACTERISTICS For either positive or negative polarity of pin voltage in respect to pin voltage. Symbol Test Conditions ACST4-7S ACST4-7C Unit I T V =12V (DC) QI - QII - QIII Tj=25 C MAX ma R L =33Ω V T V =12V (DC) R L =33Ω QI - QII - QIII Tj=25 C MAX V V D V =V DRM R L =3.3kΩ Tj=125 C MIN 0.2 V I H I = 100mA gate open Tj=25 C MAX ma I L I =2xI t max Tj=25 C MAX ma V TM I = 5.6A tp=380µs Tj=25 C MAX 1.5 V V TO Tj=125 C MAX 0.90 V Rd Tj=125 C MAX 100 mω I DRM / V = 700V Tj=25 C MAX 10 µa I RRM Tj=125 C MAX 500 dv/dt V =460V gate open Tj=110 C MIN V/µs (di/dt)c (dv/dt)c = 15V/µs Tj=125 C MIN A/ms V CL I CL = 1mA tp=1ms Tj=25 C TYP 1100 V 3/9

4 AC LINE SWITCH BASIC APPLICATION The ACST4 device has been designed to switch on & off low power, but highly inductive or resistive loads such as dishwashers spray pumps, and air-conditioners fan. Pin : Common drive reference to connect to the power line neutral Pin : Switch ate input to connect to the digital controller Pin : Switch Output to connect to the load ACST4-7S triggering current has to be sunk from the gate pin. The switch can then be driven directly by logic level circuits through a resistor as shown on the typical application diagram ( Fig A ). Thanks to its thermal and turn off commutation performances, the ACST4 switch is able to drive with no turn off additional snubber an inductive load up to 4 A. TYPICAL APPLICATION DIARAM (Fig. A) L LOAD AC MAINS L R M N ACST4 ST72 MCU - Vcc AC LINE TRANSIENT VOLTAE RUEDNESS The ACST4 switch is able to sustain safely the AC line transient voltages either by clamping the low energy spikes or by breaking over under high energy shocks, even with high turn-on current rises. The test circuit of the figure 2 is representative of the final ACST application and is also used to stress the ACST switch according to the IEC standard conditions. Thanks to the load, the ACST switch sustains the voltage spikes up to 2 kv above the peak line voltage. It will break over safely even on resistive load where the turn on current rate of rise, is as high as shown on figure 3. Such non-repetitive test can be done 10 times on each AC line voltage polarity. 4/9

5 Fig. B: Overvoltage ruggedness test circuit for resistive and inductive loads according to IEC standards. R = 150Ω, L = 10µH, V PP = 2kV. Fig. C: Current and Voltage of the ACST4 during IEC standard test with R, L&V PP. R L ACST4 SURE VOLTAE AC LINE & ENERATOR VAC +VPP R = 220Ω Fig. 1: Maximum power dissipation versus RMS on-state current. Fig. 2-1: RMS on-state current versus case temperature. P(W) 5.0 α= α α 0.5 I T(RMS) (A) I T(RMS) (A) α=180 Tc( C) /9

6 Fig. 2-2: RMS on-state current versus ambient temperature I T(RMS) (A) Tamb( C) α=180 Printed circuit board FR4 Natural convection S=0.5cm² Fig. 3: Relative variation of thermal impedance versus pulse duration K = [Zth/Rth] Zth (j-c) Zth (j-a) tp(s) 1.E-02 1.E-01 1.E+00 1.E+01 1.E+02 1.E+03 Fig. 4: Relative variation of gate trigger current, holding current and latching versus junction temperature (typical values). Fig. 5: Relative variation of static dv/dt versus junction temperature I T, I H, I L [Tj] / I T, I H, I L [Tj = 25 C] I T dv/dt [Tj] / dv/dt [Tj = 125 C] V out =460V I L & I H 0.5 Tj( C) Tj( C) Fig. 6-1: Relative variation of critical rate of decrease of main current versus reapplied dv/dt (typical values). Fig. 6-2: Relative variation of critical rate of decrease of main current versus reapplied dv/dt (typical values). (di/dt)c [(dv/dt)c] / Specified (di/dt)c 1.2 V out =300V (di/dt)c [(dv/dt)c] / Specified (di/dt)c 1.2 V out =300V ACST4-7C (dv/dt)c(v/µs) ACST4-7S (dv/dt)c(v/µs) /9

7 Fig. 7: Relative variation of critical rate of decrease of main current versus junction temperature. Fig. 8: Surge peak on-state current versus number of cycles. 6 (di/dt)c [Tj] / (di/dt)c [Tj = 125 C] V out =300V 35 I TSM(A) Non repetitive T j initial=25 C t=20ms Repetitive T C =100 C 1 Tj( C) Number of cycles Fig. 9: Non repetitive surge peak on-state current for a sinusoidal pulse with width tp < 10ms, and corresponding value of I²t. Fig. 10: On-state characteristics (maximum values) I TSM(A), I²t (A²s) di/dt limitation: 50A/µs T j initial=25 C 100 I TM(A) Tj max. : V to = 0.90 V R d = 100 mω 100 I TSM 10 T j =125 C 10 I²t 0 T j =25 C 1 tp(ms) V TM(V) Fig. 11: Thermal resistance junction to ambient versus copper surface under tab (printed circuit board FR4, copper thickness: 35µm) Rth(j-a)( C/W) 10 S(cm²) /9

8 ORDERIN INFORMATION ACST 4-7 X X AC Switch IT(RMS) 4 = 4A VDRM 7 = 700V Package B = FP = ate Sensitivity S= 10mA C = 25mA PACKAE LINE MECHANICAL DATA DIMENSIONS REF. Millimeters Inches Min. Max Min. Max. A A A B B C C D E H L typ. 31 typ. L V FOOT PRINT /9

9 PACKAE LINE MECHANICAL DATA DIMENSIONS REF. Millimeters Inches A Min. Max. Min. Max. H B A B Dia D E L3 L2 L4 L6 L5 F1 F2 D L7 F F F H L2 16 Typ Typ. L F E L L L L OTHER INFORMATION Ordering type Marking Package Weight Base qty Delivery mode ACST4-7SB ACST47S 0.3 g 75 Tube ACST4-7SB-TR ACST47S 0.3 g 2500 Tape & reel ACST4-7SFP ACST47S 2.4 g 50 Tube ACST4-7CB ACST47C 0.3 g 75 Tube ACST4-7CB-TR ACST47C 0.3 g 2500 Tape & reel ACST4-7CFP ACST47C 2.4 g 50 Tube Epoxy meets UL94,V0 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 2003 STMicroelectronics - Printed in Italy - All rights reserved. STMicroelectronics ROUP OF PANIES Australia - Brazil - Canada - China - Finland - France - ermany Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Singapore Spain - Sweden - Switzerland - United Kingdom - United States. 9/9

ACS1026T. AC switch family Transient protected AC switch (ACS ) Main product characteristics OUT COM TO-92 SO-8 ACS102-6T1 ACS102-6T1-TR.

ACS1026T. AC switch family Transient protected AC switch (ACS ) Main product characteristics OUT COM TO-92 SO-8 ACS102-6T1 ACS102-6T1-TR. AC switch family Transient protected AC switch (ACS ) Main product characteristics Overvoltage protection by crowbar technology High noise immunity - static dv/dt > 300 V/µs Applications AC ON/OFF static