SM15TY Automotive 1500 W Transil™ Features ■ peak pulse power: – 1500 W (10/1000 µs) – 10 kW (8/20 µs) ■ stand-off voltage range: from 15 V to 58 V ■ unidirectional and bidirectional types ■ low leakage current: – 0.2 µA at 25 °C – 1 µA at 85 °C ■ operating Tj max: 150 °C ■ high power capability at Tjmax: – 1250 W (10/1000 µs) ■ JEDEC registered package outline ■ resin meets UL 94, V0 ■ AEC qualified A K Unidirectional Bidirectional SMC (JEDEC DO-214AB) Description Complies with the following standards The SM15TY Transil series has been designed to protect sensitive automotive circuits against surges defined in ISO7637-2 and against electrostatic discharges according to IEC 610004-2 and ISO10605. The Planar technology makes it compatible with high-end circuits where low leakage current and high junction temperature are required to provide reliability and stability over time. SM15TY are packaged in SMC (SMC footprint in accordance with IPC 7531 standard). ■ IEC 61000-4-2 level 4: – 15 kV (air discharge) – 8 kV (contact discharge) ■ ISO10605 - C = 330 pF, R = 330 Ω: – 15 kV (air discharge) – 8 kV (contact discharge) ■ ISO 7637-2 (for pulse 1 and 2a, applicable only to parts with stand-off voltage (VRM) lower than the average battery voltage: 13.5 V): – Pulse 1: VS = -100 V – Pulse 2a: VS = +50 V – Pulse 3a: VS = -150 V – Pulse 3b: VS = +100 V TM: Transil is a trademark of STMicroelectronics September 2010 Doc ID 17865 Rev 1 1/12 www.st.com 12 Characteristics SM15TY 1 Characteristics Table 1. Absolute maximum ratings (Tamb = 25 °C) Symbol VPP Parameter Value ISO10605 (C = 330 pF, R = 330 Ω) contact discharge air discharge IEC61000-4-2 contact discharge air discharge Peak pulse voltage PPP Peak pulse power dissipation(1) Tstg Unit 30 30 kV 30 30 Tj initial = Tamb 1500 W Storage temperature range -65 to + 150 °C Tj Operating junction temperature range -40 to + 150 °C TL Maximum lead temperature for soldering during 10 s. 260 °C Value Unit 1. For a surge greater than the maximum values, the diode will fail in short-circuit. Table 2. Thermal parameter Symbol Parameter Rth(j-l) Junction to leads 15 °C/W Rth(j-a) Junction to ambient on printed circuit on recommended pad layout 90 °C/W Figure 1. Electrical characteristics - definitions Symbol VRM VBR VCL IRM IPP αT VF RD Figure 2. Parameter Stand-off voltage Breakdown voltage Clamping voltage Leakage current @ VRM Peak pulse current Voltage temperature coefficient Forward voltage drop Dynamic resistance Unidirectional I I IF IPP VF VCL VBR VRM V VCLVBR VRM IRM IR IPP IPP %IPP 100 0 Pulse waveform tr = rise time (µs) tp = pulse duration time (µs) 2/12 tr V IRM IR Pulse definition for electrical characteristics 50 IR IRM tp Doc ID 17865 Rev 1 t VRMVBR VCL Bidirectional SM15TY Table 3. Characteristics Electrical characteristics, typical values unless otherwise stated (Tamb = 25 °C) IRM max@VRM Order code 25 °C 85 °C µA VBR @IR (1) min. typ. V V VCL @IPP 10/1000 µs RD 10/1000 µs max. VCL @IPP 8/20 µs RD 8/20 µs max. αT (2) max. mA V(3) A(4) Ω V(3) A(4) Ω 10-4/ °C SM15T18AY/CAY 0.2 1 15.3 17.1 18 1 25.2 59.5 0.106 32.5 308 0.044 8.8 SM15T22AY/CAY 0.2 1 18.8 20.9 22 1 30.6 49 0.153 39.3 254 0.064 9.2 SM15T24AY/CAY 0.2 1 20.5 22.8 24 1 33.2 45 0.178 42.8 234 0.075 9.4 SM15T27AY/CAY 0.2 1 23.1 25.7 27 1 37.5 40 0.228 48.3 207 0.096 9.6 SM15T30AY/CAY 0.2 1 25.6 28.5 30 1 41.5 36 0.278 53.5 187 0.12 9.7 SM15T33AY/CAY 0.2 1 28.2 31.4 33 1 45.7 33 0.333 59 169 0.14 9.8 SM15T36AY/CAY 0.2 1 30.8 34.2 36 1 49.9 30 0.403 64.3 156 0.17 9.9 SM15T39AY/CAY 0.2 1 33.3 37.1 39 1 53.9 28 0.461 69.7 143 0.2 10 SM15T47AY/CAY 0.2 1 40.2 44.7 47 1 64.5 23.2 0.653 84 119 0.291 10.1 SM15T68AY/CAY 0.2 1 58.1 64.6 68 1 92 16.3 1.26 121 83 0.6 10.4 1. Pulse test: tp < 50 ms 2. To calculate maximum clamping voltage at other surge level, use the following formula: VCLmax = VCL - RD x (IPP - IPPappli) where IPPappli is the surge current in the application 3. To calculate VBR or VCL versus junction temperature, use the following formulas: VBR @ TJ = VBR @ 25 °C x (1 + αT x (TJ - 25)) VCL @ TJ = VCL @ 25 °C x (1 + αT x (TJ - 25)) 4. Surge capability given for both directions for unidirectional and bidirectional types. Doc ID 17865 Rev 1 3/12 Characteristics Figure 3. SM15TY Peak pulse power dissipation versus initial junction temperature (typical values) PPP(W) 2000 Figure 4. Peak pulse power versus exponential pulse duration (Tj initial = 25 °C) PPP(kW) 100.0 10/1000 µs 1500 10.0 1000 1.0 500 Tj(°C) 0 0 25 Figure 5. 1000.0 50 75 100 125 150 175 Clamping voltage versus peak pulse current (exponential waveform, maximum values) 0.1 1.0E-03 Figure 6. IPP(A) 10.00 tp (ms) 1.0E-02 1.0E-01 1.0E+00 Junction capacitance versus reverse applied voltage for unidirectional types (typical values) C(nF) T j initial=25 °C SM15T22AY/CAY 10.0 F=1 MHz Vosc =30 mVRMS Tj=25 °C SM15T30AY/CAY 100.0 1.0E+01 8/20 µs 10/1000 µs 1.00 SM15T30AY 10 ms 1.0 SM15T68AY/CAY 0.1 10 Figure 7. 100 SM15T68AY VCL(V) 1000 Junction capacitance versus reverse applied voltage for bidirectional types (typical values) 1 100 F=1 MHz Vosc =30 mVRMS Tj=25 °C 10 Figure 8. C(nF) 10.0 VR(V) 0.10 100 Thermal resistance junction to ambient versus copper surface under each lead Rth(j-a)(°C/W) Printed circuit board FR4, copper thickness = 35 µm 90 80 70 60 SM15T30CAY 50 1.0 40 30 SM15T68CAY 20 10 VR(V) 0.1 1 4/12 10 100 0 0.0 SCu(cm²) 0.5 Doc ID 17865 Rev 1 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 SM15TY Figure 9. 1.0E+04 Characteristics Leakage current versus junction temperature (typical values) Figure 10. Peak forward voltage drop versus peak forward current (typical values) IR(nA) 100.0 IFM(A) 1.0E+03 10.0 1.0E+02 Tj = 125 °C Tj = 25 °C 1.0 1.0E+01 1.0E+00 25 Tj(°C) 50 75 100 125 VFM(V) 0.1 0.0 150 0.5 1.0 1.5 2.0 2.5 Figure 11. ISO7637-2 pulse 1 response (VS = -100 V) Voltage (V) Voltage 10 0 -10 -20 -30 SM15T39AY -40 SM15T39CAY -50 -0.5 0.0 0.5 1.0 1.5 2.0 2.5 Time (ms) 5 Current (A) Current 0 SM15T39AY -5 SM15T39CAY -10 -15 -0.5 0.0 0.5 1.0 1.5 2.0 2.5 Time (ms) Doc ID 17865 Rev 1 5/12 Characteristics SM15TY Figure 12. ISO7637-2 pulse 2 response (VS = 50 V) Voltage (V) 50 Voltage 40 SM15T39AY 30 SM15T39CAY 20 10 0 -20 0 40 20 60 80 100 Time (µs) 12 Current (A) Current 8 SM15T39AY 4 SM15T39CAY 0 -4 -20 0 40 20 60 80 100 Time (µs) Figure 13. ISO7637-2 pulse 3a response (VS = -150 V) Voltage (V) Voltage 20 0.0 SM15T39AY -20 SM15T39CAY -40 -60 -0.5 0.0 1.0 0.5 1.5 2.0 Time (µs) 1 Current (A) Current 0.0 SM15T39AY SM15T39CAY -1 -2 -0.2 0.8 1.8 0.0 Time (µs) 6/12 Doc ID 17865 Rev 1 0.0 0.0 SM15TY Characteristics Figure 14. ISO7637-2 pulse 3b response (VS = 100 V) 50 Voltage (V) Voltage 40 SM15T39AY 30 SM15T39CAY 20 10 0 -0.2 0.8 1.8 Time (µs) 1.2 Current (A) Current 0.8 SM15T39AY 0.4 SM15T39CAY 0 -0.4 -0.2 0.8 1.8 Time (µs) Doc ID 17865 Rev 1 7/12 Application and design guidelines 2 SM15TY Application and design guidelines More information is available in the Application note AN2689 “Protection of automotive electronics from electrical hazards, guidelines for design and component selection”. 3 Ordering information scheme Figure 15. Ordering information scheme SM Surface mount Surge rating 15 = 1500 W Transil in SMC Bre a k down v olta ge Types CA = Bidirectional A = Unidirectional Automotive grade 8/12 Doc ID 17865 Rev 1 15T XX CA Y SM15TY 4 Package information Package information ● Case: JEDEC DO-214AB molded plastic over planar junction ● Terminals: solder plated, solderable as per MIL-STD-750, Method 2026 ● Polarity: for unidirectional types the band indicates cathode ● Flammability: epoxy is rated UL 94, V0 ● RoHS package 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: www.st.com. ECOPACK® is an ST trademark. Table 4. SMC dimensions Dimensions Ref. E1 D Max. Min. Max. A1 1.90 2.45 0.075 0.096 A2 0.05 0.20 0.002 0.008 b 2.90 3.20 0.114 0.126 c 0.15 0.40 0.006 0.016 D 5.55 6.25 0.218 0.246 E 7.75 8.15 0.305 0.321 E1 6.60 7.15 0.260 0.281 E2 4.40 4.70 0.173 0.185 L 0.75 1.50 0.030 0.059 A1 A2 E2 L b Inches Min. E C Millimeters Figure 16. SMC footprint dimensions in Figure 17. Marking layout(1) mm (inches) 1.54 (0.061) 5.11 (0.201) 1.54 (0.061) Cathode bar (unidirectional devices only ) 3.14 (0.124) x x x z y ww ECOPACK compliance XXX: Marking Z: Manufacturing location Y: Year WW: week 8.19 (0.322) 1. Marking layout can vary according to assembly location. Doc ID 17865 Rev 1 9/12 Package information Table 5. SM15TY Marking Order code 10/12 Marking Order code Marking SM15T18AY MEEY SM15T18CAY BEEY SM15T22AY MEKY SM15T22CAY BEKY SM15T24AY MEMY SM15T24CAY BEMY SM15T27AY MEPY SM15T27CAY BEPY SM15T30AY MERY SM15T30CAY BERY SM15T33AY METY SM15T33CAY BETY SM15T36AY MEVY SM15T36CAY BEVY SM15T39AY MEXY SM15T39CAY BEXY SM15T47AY MFAY SM15T47CAY BFAY SM15T68AY MFPY SM15T68CAY BFPY Doc ID 17865 Rev 1 SM15TY 5 Ordering information Ordering information Table 6. Ordering information Order code Marking Package Weight Base qty Delivery mode SM15TxxxAY/CAY(1) See Table 5 on page 10 SMC 0.25 g 2500 Tape and reel 1. Where xxx is nominal value of VBR and A or CA indicates unidirectional or bidirectional version. See Table 3 for list of available devices and their order codes 6 Revision history Table 7. Document revision history Date Revision 15-Sep-2010 1 Description of changes Initial release. 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