SM6TY Automotive 600 W Transil™ Features ■ peak pulse power: – 600 W (10/1000 µs) – 4 kW (8/20 µs) A ■ stand-off voltage range: from 6.4 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 Tj max: – 515 W (10/1000 µs) ■ JEDEC registered package outline ■ resin meets UL 94, V0 ■ ECOPACK®2 compliant components ■ AEC-Q101 qualified K Bidirectional SMB (JEDEC DO-214AA) Unidirectional Description Complies with the following standards The SM6TY Transil series has been designed to protect sensitive automotive circuits against surges defined in ISO 7637-2 and against electrostatic discharges according to IEC 61000-4-2 and ISO 10605. The planar technology makes this device compatible with high-end circuits where low leakage current and high junction temperature are required to provide reliability and stability over time. SM6TY are packaged in SMB (SMB footprint in accordance with IPC 7531 standard). ■ IEC 61000-4-2 level 4: – 15 kV (air discharge) – 8 kV (contact discharge) ■ ISO 10605, 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 17741 Rev 1 1/11 www.st.com 11 Characteristics SM6TY 1 Characteristics Table 1. Absolute maximum ratings (Tamb = 25 °C) Symbol VPP PPP Tj Tstg TL Parameter Peak pulse voltage Value ISO 10605 (C = 330 pF, R = 330 Ω) Contact discharge Air discharge IEC 61000-4-2 Contact discharge Air discharge Peak pulse power dissipation(1) Unit 30 30 kV 30 30 Tj initial = Tamb 600 W Operating junction temperature range -55 to 150 Storage temperature range -65 to 150 Maximum lead temperature for soldering during 10 s. °C 260 1. For a surge greater than the maximum values, the diode will fail in short-circuit. Table 2. Thermal resistance Symbol Parameter Value Unit Rth(j-l) Junction to leads 20 °C/W Rth(j-a) Junction to ambient on printed circuit on recommended pad layout 100 °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 V IRM IR IPP IPP Repetitive pulse current tr = rise time (µs) tp = pulse duration time (µs) 2/11 IR IRM IRM IR Pulse definition for electrical characteristics tr VCLVBR VRM tp Doc ID 17741 Rev 1 VRMVBR VCL Bidirectional SM6TY Characteristics Table 3. Electrical characteristics, typical values unless otherwise stated (Tamb = 25 °C) IRM max@VRM Order code 25 °C 85 °C VBR @IR (1) min. typ. µA V V VCL @IPP 10/1000 µs RD (2) 10/1000 µs max. VCL @IPP RD (2) 8/20 µs 8/20 µs max. mA V(3) A(4) Ω V(3) αT max. A(4) Ω 10-4/ °C SM6T7V5AY 20 50 6.4 7.13 7.5 10 11.3 53 0.065 14.5 276 0.024 6.1 SM6T18AY/CAY 0.2 1 15.3 17.1 18 1 25.2 24 0.263 32.5 123 0.111 8.8 SM6T22AY/CAY 0.2 1 18.8 20.9 22 1 30.6 20 0.375 39.3 102 0.159 9.2 SM6T24AY/CAY 0.2 1 20.5 22.8 24 1 33.2 18 0.444 42.8 93 0.189 9.4 SM6T27AY/CAY 0.2 1 23.1 25.7 27 1 37.5 16 0.569 48.3 83 0.240 9.6 SM6T30AY/CAY 0.2 1 25.6 28.5 30 1 41.5 14.5 0.690 53.5 75 0.293 9.7 SM6T33AY/CAY 0.2 1 28.2 31.4 33 1 45.7 13.1 0.840 59.0 68 0.357 9.8 SM6T36AY/CAY 0.2 1 30.8 34.2 36 1 49.9 12 1.01 64.3 62 0.427 9.9 SM6T39AY/CAY 0.2 1 33.3 37.1 39 1 53.9 11.1 1.16 69.7 57 0.504 10.0 SM6T42CAY 0.2 1 36 42.1 1 58.1 10.3 1.35 76 52 0.611 10.0 SM6T47AY/CAY 0.2 1 40 44.4 46.7 1 64.5 9.7 1.59 84 48 0.728 10.1 SM6T68AY/CAY 0.2 1 1 92 6.5 3.17 121 33 1.503 10.4 40 58.1 64.6 68 1. Pulse test : tp < 50 ms 2. To calculate maximum clamping voltage at another 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. Figure 3. Peak power dissipation versus initial junction temperature (typical values) Figure 4. Ppp (W) Peak pulse power versus exponential pulse duration PPP(kW) 700 100.0 10/1000 µs Tj initial = 25 °C 600 500 10.0 400 300 1.0 200 100 Tj(°C) tP(ms) 0.1 0 0 25 50 75 100 125 150 175 1.0E-03 Doc ID 17741 Rev 1 1.0E-02 1.0E-01 1.0E+00 1.0E+01 3/11 Characteristics Figure 5. 100.0 SM6TY Clamping voltage versus peak pulse current exponential waveform (maximum values) IPP(A) Tj initial = 25 °C 8/20 µs 10.0 10/1000 µs 10 ms SM6T68A SM6T30A 1.0 VCL(V) 0.1 10 Figure 6. 10 100 1000 ISO 7637-2 pulse 1 response (VS = -100 V) Voltage (V) 0 -10 -20 -30 -40 SM6T36AY -50 SM6T36CAY Current (A) 0 -2 -4 -6 -8 -10 -12 Time (ms) 0.0 4/11 1.0 2.0 Doc ID 17741 Rev 1 3.0 4.0 SM6TY Characteristics Figure 7. ISO 7637-2 pulse 2a response (VS = 50 V) Voltage (V) 50 40 30 20 10 0 12 SM6T36AY Current (A) SM6T36CAY 10 Note: Curves superimposed 8 6 4 2 0 Time (µs) 0 Figure 8. 20 30 40 50 60 70 80 90 100 ISO 7637-2 pulse 3a response (VS = -150 V) 20 Voltage (V) 10 0 -10 -20 -30 -40 SM6T36AY -50 SM6T36CAY 0.5 Current (A) 0 -0.5 -1.0 -1.5 -2.0 -2.5 -3.0 Time (µs) 0 0.2 0.4 0.6 0.8 1.0 Doc ID 17741 Rev 1 1.2 1.4 1.6 5/11 Characteristics Figure 9. 60 SM6TY ISO 7637-2 pulse 3b response (VS = 100 V) Voltage (V) 50 40 30 20 10 0 Current (A) SM6T36AY 3.0 SM6T36CAY 2.5 Note: Curves superimposed 2.0 1.5 1.0 0.5 0 Time (µs) 0 Note: 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 ISO7637-2 pulses responses are not applicable for products with a stand off voltage lower than the average battery voltage (13.5 V). Figure 10. Junction capacitance versus reverse Figure 11. Junction capacitance versus applied voltage for unidirectional reverse applied voltage for types (typical values) bidirectional types (typical values) 1000 C(pF) 1000 C(pF) F = 1 Mhz Vosc = 30 mVRMS Tj = 25 °C SM6T30CAY F=1 MHz Vosc =30 mVRMS Tj=25 °C SM6T30AY 100 SM6T68AY VR(V) VR(V) 10 1 6/11 SM6T68CAY 100 10 100 10 1 Doc ID 17741 Rev 1 10 100 SM6TY Characteristics Figure 12. Relative variation of thermal impedance, junction to ambient, versus pulse duration 1.00 Figure 13. Thermal resistance junction to ambient versus copper surface under each lead Rth(j-a) (°C/W) Zth (j-a)/Rth (j-a) 110 Recommended pad layout Printed circuit board FR4, copper thickness = 35 µm 100 Printed circuit board FR4, copper thickness = 35 µm 90 80 70 60 0.10 50 40 30 20 tp ms 10 0.01 SCu(cm²) 0 1.0E-03 1.0E-02 1.0E-01 1.0E+00 1.0E+01 1.0E+02 1.0E+03 Figure 14. Leakage current versus junction temperature (typical values) IR (nA) 0.0 0.5 VR=VRM VRM < 10 V 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Figure 15. Peak forward voltage drop versus peak forward current (typical values) 1.0E+02 1.E+03 1.0 1.E+02 1.0E+01 1.E+01 1.0E+00 IFM(A) Tj =125 °C Tj =25 °C VR=VRM VRM ≥ 10 V 1.E+00 1.0E-01 Tj (° C) VFM(V) 1.E-01 1.0E-02 25 50 75 100 125 150 0.0 Doc ID 17741 Rev 1 0.5 1.0 1.5 2.0 2.5 3.0 7/11 Application and design guidelines 2 SM6TY Application and design guidelines More information is available in the ST Application note AN2689 “Protection of automotive electronics from electrical hazards, guidelines for design and component selection”. 3 Ordering information scheme Figure 16. Ordering information scheme SM Surface mount Peak pulse power 6 = 600 W Transil in SMB Breakdown voltage 30 = 30 V Types CA = Bidirectional A = Unidirectional Automotive grade 8/11 Doc ID 17741 Rev 1 6 T XX CA Y SM6TY 4 Packaging information Packaging information ● Case: JEDEC DO-214AA 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 meets 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. SMB dimensions Dimensions E1 Ref. D Millimeters Inches Min. Max. Min. Max. A1 1.90 2.45 0.075 0.096 A2 0.05 0.20 0.002 0.008 b 1.95 2.20 0.077 0.087 c 0.15 0.40 0.006 0.016 D 3.30 3.95 0.130 0.156 E 5.10 5.60 0.201 0.220 E1 4.05 4.60 0.159 0.181 L 0.75 1.50 0.030 0.059 E A1 A2 C L b Figure 17. SMB footprint dimensions in mm (inches) 1.62 2.60 (0.064) (0.102) Figure 18. Marking layout(1) 1.62 (0.064) Cathode bar (unidirectional devices only ) 2.18 (0.086) 5.84 (0.300) x x x z y ww ECOPACK compliance XXX: Marking Z: Manufacturing location Y: Year WW: Week 1. Marking layout can vary according to assembly location. Doc ID 17741 Rev 1 9/11 Ordering information Table 5. 5 SM6TY Marking Order code Marking SM6T7V5AY DGY SM6T18AY EEY Order code Marking SM6T18CAY MEY SM6T22AY EKY SM6T22CAY MKY SM6T24AY EMY SM6T24CAY MMY SM6T27AY EPY SM6T27CAY MPY SM6T30AY ERY SM6T30CAY MRY SM6T33AY ETY SM6T33CAY MTY SM6T36AY EVY SM6T36CAY MVY SM6T39AY EXY SM6T39CAY MXY SM6T42CAY NAY SM6T47AY FAY SM6T47CAY NBY SM6T68AY FQY SM6T68CAY NQY Ordering information Table 6. Ordering information Order code Marking SM6TxxxAy/CAy(1) See Table 5 on page 10 Package Weight SMB 0.11 g Base qty Delivery mode 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. 10/11 Document revision history Date Revision 15-Sep-2010 1 Changes Initial release. Doc ID 17741 Rev 1 SM6TY Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. 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