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ISOW7842DWE Datasheet(PDF) 7 Page - Texas Instruments |
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ISOW7842DWE Datasheet(HTML) 7 Page - Texas Instruments |
7 / 38 page 7 ISOW7840, ISOW7841, ISOW7842, ISOW7843, ISOW7844 www.ti.com SLLSEY2 – MARCH 2017 Product Folder Links: ISOW7840 ISOW7841 ISOW7842 ISOW7843 ISOW7844 Submit Documentation Feedback Copyright © 2017, 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, ribs, or both 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. 7.6 Insulation Specifications PARAMETER TEST CONDITIONS VALUE UNIT GENERAL CLR External clearance(1) Shortest terminal-to-terminal distance through air >8 mm CPG External creepage(1) Shortest terminal-to-terminal distance across the package surface >8 mm DTI Distance through the insulation Minimum internal gap (internal clearance – capacitive signal isolation) > 21 µm Minimum internal gap (internal clearance – transformer power isolation) >120 CTI Comparative tracking index DIN EN 60112 (VDE 0303-11); IEC 60112 > 600 V Material group According to IEC 60664-1 I Overvoltage category per IEC 60664-1 Rated mains voltage ≤ 300 VRMS I-IV Rated mains voltage ≤ 600 VRMS I-IV Rated mains voltage ≤ 1000 VRMS I-III DIN V VDE 0884-10 (VDE V 0884-10): 2016-12(2) VIORM Maximum repetitive peak isolation voltage AC voltage (bipolar) 1414 VPK VIOWM Maximum isolation working voltage AC voltage; Time dependent dielectric breakdown (TDDB) Test 1000 VRMS DC voltage 1414 VDC VIOTM Maximum transient isolation voltage VTEST = VIOTM; t = 60 s (qualification); VTEST = 1.2 × VIOTM; t = 1 s (100% production) 7071 VPK VIOSM Maximum surge isolation voltage(3) Test method per IEC 60065, 1.2/50 µs waveform, VTEST = 1.6 × VIOSM (qualification) 6250 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 pC Method a, after environmental tests subgroup 1, Vini = VIOTM, tini = 60 s; Vpd(m) = 1.6 × VIORM, tm = 10 s ≤ 5 Method b1, at routine test (100% production) and preconditioning (type test), Vini = 1.2 × VIOTM, tini = 1 s; Vpd(m) = 1.875 × VIORM, tm = 1 s ≤ 5 CIO Barrier capacitance, input to output(5) VIO = 0.4 × sin (2πft), f = 1 MHz ~3.5 pF RIO Insulation resistance(5) VIO = 500 V, TA = 25°C > 1012 Ω VIO = 500 V, 100°C ≤ TA ≤ 125°C > 1011 VIO = 500 V, TS = 150°C > 109 Pollution degree 2 Climatic category 40/125/21 UL 1577 VISO(UL) Withstand isolation voltage VTEST = VISO(UL), t = 60 s (qualification), VTEST = 1.2 × VISO(UL), t = 1 s (100% production) 5000 VRMS |
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