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ISO7720FDWR Datasheet(PDF) 6 Page - Texas Instruments |
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ISO7720FDWR Datasheet(HTML) 6 Page - Texas Instruments |
6 / 33 page 6 ISO7720, ISO7721 SLLSEP3A – NOVEMBER 2016 – REVISED DECEMBER 2016 www.ti.com Product Folder Links: ISO7720 ISO7721 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated (1) Creepage and clearance requirements should be applied according to the specific equipment isolation standards of an application. Care should be taken to maintain the creepage and clearance distance of a board design to ensure that the mounting pads of the isolator on the printed-circuit board do not reduce this distance. Creepage and clearance on a printed-circuit board become equal in certain cases. Techniques such as inserting grooves and/or ribs on a printed circuit board are used to help increase these specifications. (2) This coupler is suitable for safe electrical insulation only within the safety ratings. Compliance with the safety ratings shall be ensured by means of suitable protective circuits. (3) Testing is carried out in air or oil to determine the intrinsic surge immunity of the isolation barrier. (4) Apparent charge is electrical discharge caused by a partial discharge (pd). (5) All pins on each side of the barrier tied together creating a two-terminal device. 6.6 Insulation Specifications PARAMETER TEST CONDITIONS VALUE UNIT DW-16 D-8 CLR External clearance (1) Shortest terminal-to-terminal distance through air 8 4 mm CPG External creepage (1) Shortest terminal-to-terminal distance across the package surface 8 4 mm DTI Distance through the insulation Minimum internal gap (internal clearance) 21 21 μm CTI Comparative tracking index DIN EN 60112 (VDE 0303-11); IEC 60112; UL 746A > 600 > 600 V Material group According to IEC 60664-1 I I Overvoltage category per IEC 60664-1 Rated mains voltage ≤ 150 VRMS I–IV I–IV Rated mains voltage ≤ 300 VRMS I–IV I–III Rated mains voltage ≤ 600 VRMS I–IV n/a Rated mains voltage ≤ 1000 VRMS I–III n/a DIN V VDE V 0884-10 (VDE V 0884-10):2006-12 (2) VIORM Maximum repetitive peak isolation voltage AC voltage (bipolar) 1414 637 VPK VIOWM Maximum working isolation voltage AC voltage; Time dependent dielectric breakdown (TDDB) test 1000 450 VRMS DC voltage 1414 637 VDC VIOTM Maximum transient isolation voltage VTEST = VIOTM t = 60 s (qualification) t = 1 s (100% production) 8000 4242 VPK VIOSM Maximum surge isolation voltage (3) Test method per IEC 60065, 1.2/50 µs waveform, VTEST = 1.6 × VIOSM (qualification) 8000 5000 VPK qpd Apparent charge (4) Method a, After Input/Output safety test subgroup 2/3, Vini = VIOTM, tini = 60 s; Vpd(m) = 1.2 × VIORM, tm = 10 s ≤5 ≤5 pC Method a, After environmental tests subgroup 1, Vini = VIOTM, tini = 60 s; Vpd(m) = 1.6 × VIORM, tm = 10 s ≤5 ≤5 Method b1; At routine test (100% production) and preconditioning (type test) Vini = VIOTM, tini = 1 s; Vpd(m) = 1.875 × VIORM, tm = 1 s ≤5 ≤5 CIO Barrier capacitance, input to output(5) VIO = 0.4 × sin (2πft), f = 1 MHz ~0.5 ~0.5 pF RIO Isolation resistance(5) VIO = 500 V, TA = 25°C >1012 >1012 Ω VIO = 500 V, 100°C ≤ TA ≤ 125°C >1011 >1011 VIO = 500 V at TS = 150°C >109 >109 Pollution degree 2 2 Climatic category 55/125/21 5/125/21 UL 1577 VISO Withstanding isolation voltage VTEST = VISO, t = 60 s(qualification); VTEST = 1.2 × VISO, t = 1 s (100% production) 5000 3000 VRMS |
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