ACS108-8TN. Overvoltage protected AC switch (ACS TM )

Transcription

1 ACS108-8TN Overvoltage protected AC switch (ACS TM ) Datasheet - production data CO M SOT-223 G CO M OU T Description The ACS108-8TN belongs to the AC switch range (built with A.S.D. technology). This high performance switch can control a load of up to 0.8 A. The ACS108-8TN switch includes an overvoltage crowbar structure to absorb the inductive turn-off energy, and a gate level shifter driver to separate the digital controller from the main switch. It is triggered with a negative gate current flowing out of the gate pin. Figure 1: Functional diagram Features Enables equipment to meet IEC surge with overvoltage crowbar technology High noise immunity against static dv/dt and IEC burst Needs no external protection snubber or varistor Interfaces directly with the microcontroller ECOPACK 2 and RoHS compliant component Applications Alternating current on/off static switching in appliances and industrial control systems Driving low power high inductive or resistive loads like: Relay, valve, solenoid, dispenser Pump, fan, low power motor, door lock lamp Symbol IT(RMS) VDRM/VRRM IGT G COM OUT G OUT COM Common drive reference to connect to the mains Output to connect to the load. Gate input to connect to the controller through gate resistor Table 1: Device summary Value 0.8 A 800 V 5 ma June 2016 DocID Rev 1 1/14 This is information on a product in full production.

2 Characteristics ACS108-8TN 1 Characteristics Table 2: Absolute ratings (limiting values) Symbol Parameter Value Unit IT(RMS) ITSM RMS on-state current (180 conduction angle) Non repetitive surge peak on-state current Ttab = 104 C 0.8 A tp = 16.7 ms 13.7 Tj initial = 25 C tp = 20 ms 13 I 2 t I 2 t value for fusing tp = 10 ms Tj = 25 C 1.1 A 2 s VRRM / VDRM dl/dt Repetitive peak off-state voltage Tj = 125 C 800 V Critical rate of rise of on-state current IG = 2 x IGT, tr 100 ns f = 120 Hz 100 A/µs Vpp (1) Non repetitive peak pulse line voltage Tj = 25 C 2 kv IGM Peak gate current tp = 20 µs Tj = 125 C 1 A VGM Peak positive gate voltage Tj = 125 C 10 V PG(AV) Average gate power dissipation Tj = 125 C 0.1 W Notes: Tstg Storage junction temperature range -40 to +150 C Tj Maximum operating junction temperature range -40 to +125 C (1) According to test described by IEC standard and test per Figure 18. A Table 3: Electrical characteristics (Tj = 25 C unless otherwise specified) Symbol Test Conditions Quadrant Value Unit IGT (1) II - III Max. 5 ma VOUT = 12 V, RL = 33 Ω VGT II - III Max. 1 V VGD VOUT = VDRM, RL = 3.3 kω, Tj = 125 C II - III Min V IH IT = 100 ma, gate open Max. 10 ma IL IG = 1.2 x IGT Max. 20 ma dv/dt VD = 402 V, gate open, Tj = 125 C 600 Max. VD = 536 V, gate open, Tj = 125 C 300 V/µs (dl/dt)c (dl/dt)c < 15 V/µs, turn-off time 20 ms, Tj = 125 C Min. 0.8 A/ms VCL ICL = 1 ma, tp = 1 ms, Tj = 125 C Min. 850 V Notes: (1) Minimum IGT is guaranteed at 10% of IGT max. 2/14 DocID Rev 1

3 ACS108-8TN Characteristics Table 4: Static electrical characteristics Symbol Test conditions Value Unit VTM (1) ITM = 1.1 A, tp = 380 µs Tj = 25 C Max. 1.3 V Vto Threshold voltage Tj = 125 C Max V RD Dynamic resistance Tj = 125 C Max. 350 mω IDRM Tj = 25 C 2 µa VOUT = VDRM = VRRM Max. IRRM Tj = 125 C 0.2 ma Notes: (1) For both polarities Table 5: Thermal resistance Symbol Parameter Value Unit Rth(j-t) Junction to tab (AC) Max. 25 Rth(j-a) Junction to ambient (Scu = 5 cm 2 ) Typ. 60 C/W DocID Rev 1 3/14

4 Characteristics 1.1 Characteristics (curves) Figure 2: Maximum power dissipation versus on-state RMS current P(W) 1.0 α = ACS108-8TN Figure 3: On-state RMS current versus tab temperature (full cycle) IT(RMS)(A) α = I T(RMS) (A) T TAB ( C) Figure 4: On state RMS current versus ambient temperature (free air, full cycle) IT(RMS)(A) 1.0 α = Figure 5: Relative variation of thermal impedance versus pulse duration K = [Z th /R th ] 1.00 Z Z th(j-t) th(j-a) TA( C) tp(s) E-03 1.E-02 1.E-01 1.E+00 1.E+01 1.E+02 1.E+03 Figure 6: Relative variation of holding current IH and latching current IL versus junction temperature I H, I L [T j ] / I H, I L [T j = 25 C] Figure 7: Relative variation of gate triggering current IGT and gate triggering voltage VGT versus junction temperature I GT, V GT [T j ]/I GT, V GT [T j = 25 C] I GT Q2 1.5 I L 2.0 I GT Q I H 1.0 V GT Q2-Q T j ( C) T j ( C) /14 DocID Rev 1

5 ACS108-8TN Figure 8: Surge peak on-state current versus number of cycles I TSM (A) 15 Characteristics Figure 9: Non repetitive surge peak on-state current for a sinusoidal pulse versus pulse width I TSM (A) 1.E+03 T j initial = 25 C t = 20ms One cycle 10 Non repetitive T j initial = 25 C 1.E+02 I TSM 5 Repetitive T TAB = 104 C 1.E+01 Number of cycles tp(ms) 1.E Figure 10: On-state characteristics (maximum values) Figure 11: Relative variation of critical rate of decrease of main current (di/dt)c versus junction temperature (dl/dt)c [T j ] / (dl/dt)c [T j = 125 C] T j ( C) Figure 12: Relative variation of critical rate of decrease of main current (di/dt)c versus reapplied (dv/dt)c (di/dt)c [ (dv/dt)c ] / Specified (di/dt)c 4 Figure 13: Relative variation of static dv/dt immunity versus junction temperature (typical values) dv/dt [T j ] / dv/dt [T j = 125 C] 10 T j = 125 C 9 V D = V R = 536 V (dv/dt)c (V/µs) T j ( C) DocID Rev 1 5/14

6 Characteristics Figure 14: Relative variation of Leakage current versus junction temperature 1.E+00 I DRM /I RRM [T j ; V DRM /V RRM ] / I DRM /I RRM [T j = 125 C; 800 V] V DRM = V RRM = 800 V ACS108-8TN Figure 15: Thermal resistance junction to ambient versus copper surface under tab R th(j-a) ( C/W) 120 SOT E T j ( C) 1.E S Cu (cm 2 ) /14 DocID Rev 1

7 ACS108-8TN Alternating current mains switch - basic application 2 Alternating current mains switch - basic application The ACS108-8TN switch is triggered by a negative gate current flowing from the gate pin G. The switch can be driven directly by the digital controller through a resistor as shown in Figure 16: "Typical application schematic". Thanks to its over-voltage protection and turn-off commutation performance, the ACS108-8TN switch can drive a small power high inductive load with neither varistor nor additional turn-off snubber. Figure 16: Typical application schematic Vss Rg G OUT AC Mains Vdd COM 2.1 Protection against overvoltage: the best choice is ACS In comparison with standard Triacs the ACS108-8TN is overvoltage self-protected, as specified by the new parameter VCL. This feature is useful in two operating conditions: in case of turn-off of very inductive load, and in case of surge voltage that can occur on the electrical network. DocID Rev 1 7/14

8 Alternating current mains switch - basic ACS108-8TN application High inductive load switch-off: turn-off over-voltage clamping With high inductive and low rms current loads the rate of decrease of the current is very low. An overvoltage can occur when the gate current is removed and the OUT current is lower than IH. As shown in Figure 17, at the end of the last conduction half-cycle, the load current decreases 1. The load current reaches the holding current level IH 2, and the ACS turns off 3. An inductive load (up to 15 H) reacts as a current generator and an overvoltage is created, which is clamped by the ACS 4. The current flows through the ACS avalanche and decreases linearly to zero. During this time, the voltage across the switch is limited to the clamping voltage VCL. The energy stored in the inductance of the load is dissipated in the clamping section that is designed for this purpose. When the energy has been dissipated, the ACS voltage falls back to the mains voltage value (230 V RMS, 50 Hz) 5. Figure 17: Switching off of a high inductive load - typical clamping capability of ACS108-8TN 4 V CL IT (5 ma/div) 3 VT (200 V/div) I T I H V CL V T 1 2 I H 100 µs/div 5 8/14 DocID Rev 1

9 AC mains ACS108-8TN Alternating current mains switch - basic application Alternating current mains transient voltage ruggedness The ACS108-8TN switch is able to withstand safely the AC mains transients either by clamping the low energy spikes or by breaking-over when subjected to high energy shocks, even with high turn-on current rises. The test circuit shown in Figure 18 is representative of the final ACS108-8TN application, and is also used to test the AC switch according to the IEC standard conditions. Thanks to the load limiting the current, the ACS108-8TN switch withstands the voltage spikes up to 2 kv above the peak mains voltage. The protection is based on an overvoltage crowbar technology. Actually, the ACS108-8TN breaks over safely as shown in Figure 19. The ACS108-8TN recovers its blocking voltage capability after the surge (switch off back at the next zero crossing of the current). Such non-repetitive tests can be done 10 times on each AC mains voltage polarity. Figure 18: Overvoltage ruggedness test circuit for resistive and inductive loads, Tamb = 25 C (conditions equivalent to IEC standard) Surge generator Rgenerator Filtering unit Cc Model of the load R L OUT GATE Rg COM R = 150 Ω, L = 5 μh, Vpp = 2 kv (Surge Generator), Rg = 220 Ω, AC mains = 230 VRMS 50 Hz, Cc = 18 μf. DocID Rev 1 9/14

10 Alternating current mains switch - basic application Figure 19: Typical current and voltage waveforms across the ACS108-8TN (+2 kv surge, IEC standard) ACS108-8TN V T (200 V/div) I T max = 15.8 A I T (4 A/div) di T /dt = 78 A/us 1 us/div 10/14 DocID Rev 1

11 ACS108-8TN Package information 3 Package information In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are available at: ECOPACK is an ST trademark. Epoxy meets UL94, V0 Lead-free packages 3.1 SOT-223 package information Figure 20: SOT-223 package outline DocID Rev 1 11/14

12 Package information ACS108-8TN Table 6: SOT-223 package mechanical data Dimensions Ref. Millimeters Inches Min. Typ. Max. Min. Typ. Max. A A B B c D e e E H V 10 max. Figure 21: SOT-223 footprint (dimensions in mm) /14 DocID Rev 1

13 ACS108-8TN Ordering information 4 Ordering information Figure 22: Ordering information scheme ACS T N - TR AC switch series Number of switches Current 08 = 0.8 A rms Voltage 8 = 800 V Sensitivity S = 5 ma Package N = SOT-223 Packing TR = Tape and reel Table 7: Ordering information Order code Marking Package Weight Base qty. Delivery mode ACS108-8TN-TR ACS1088T SOT g 1000 Tape and reel 5 Revision history Table 8: Document revision history Date Revision Changes 02-Jun Initial release. DocID Rev 1 13/14

14 ACS108-8TN IMPORTANT NOTICE PLEASE READ CAREFULLY STMicroelectronics NV and its subsidiaries ( ST ) reserve the right to make changes, corrections, enhancements, modifications, and improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. ST products are sold pursuant to ST s terms and conditions of sale in place at the time of order acknowledgement. Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of Purchasers products. No license, express or implied, to any intellectual property right is granted by ST herein. Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product. ST and the ST logo are trademarks of ST. All other product or service names are the property of their respective owners. Information in this document supersedes and replaces information previously supplied in any prior versions of this document STMicroelectronics All rights reserved 14/14 DocID Rev 1