6

ISO5451-Q1

SLLSEQ3A – SEPTEMBER 2016 – REVISED DECEMBER 2016

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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 basic electrical insulation only within the maximum operating 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 Characteristics

PARAMETER

TEST CONDITIONS

SPECIFICATION

UNIT

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)

>21

μm

CTI

Tracking resistance (comparative tracking

index)

DIN EN 60112 (VDE 0303-11); IEC 60112;

>600

V

Material Group

According to IEC 60664-1; UL 746A

I

Overvoltage category (according to IEC

60664-1)

Rated Mains Voltage

≤ 300 VRMS

I-IV

Rated Mains Voltage

≤ 600 VRMS

I-III

Rated Mains Voltage

≤ 1000 VRMS

I-II

DIN V VDE V 0884-10 (VDE V 0884-10):2006-12(2)

VIORM

Maximum repetitive peak isolation voltage

AC voltage (bipolar)

1420

VPK

VIOWM Maximum isolation working voltage

AC voltage. Time dependent dielectric breakdown

(TDDB) Test, see Figure 1

1000

VRMS

DC voltage

1420

VDC

VIOTM

Maximum Transient isolation voltage

VTEST = VIOTM, t = 60 sec (qualification), t = 1 sec

(100% production)

8000

VPK

VIOSM

Maximum surge isolation voltage(3)

Test method per IEC 60065, 1.2/50 μs waveform,

VTEST = 1.6 × VIOSM = 10000 VPK (qualification)

(3)

6250

qpd

Apparent charge(4)

Method a: After I/O safety test subgroup 2/3,

Vini = VIOTM, tini = 60 s;

Vpd(m) = 1.2 × VIORM = 1704 VPK ,

tm = 10 s

≤5

pC

Method a: After environmental tests subgroup 1,

Vini = VIOTM, tini = 60 s;

Vpd(m) = 1.6 × VIORM = 2272 VPK ,

tm = 10 s

≤5

Method b1: At routine test (100% production) and

preconditioning (type test)

Vini = VIOTM, tini = 60 s;

Vpd(m) = 1.875 × VIORM = 2663 VPK ,

tm = 10 s

≤5

RIO

Isolation resistance, input to output(5)

VIO = 500 V, TA = 25°C

> 1012

Ω

VIO = 500 V, 100°C ≤ TA ≤ 125°C

> 1011

Ω

VIO = 500 V at TS = 150°C

> 109

Ω

CIO

Barrier capacitance, input to output(5)

VIO = 0.4 × sin (2πft), f = 1 MHz

1

pF

Pollution degree

2

UL 1577

VISO

Withstanding Isolation voltage

VTEST = VISO, t = 60 sec (qualification),

VTEST = 1.2 × VISO = 6840 VRMS,

t = 1 sec (100% production)

5700

VRMS