7

ISO7740, ISO7741, ISO7742

www.ti.com

SLLSEP4A – MARCH 2016 – REVISED JUNE 2016

Product Folder Links: ISO7740 ISO7741 ISO7742

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

DBQ-16

CLR

Shortest terminal-to-terminal distance through air

>8

>3.7

μm

CPG

Shortest terminal-to-terminal distance across the package

surface

>8

>3.7

μm

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

>600

>600

V

Material group

According to IEC 60664-1

I

I

Overvoltage category per IEC 60664-1

Rated mains voltage

I-IV

I-III

Rated mains voltage

I-IV

n/a

Rated mains voltage

I-III

n/a

Maximum repetitive peak isolation voltage

AC voltage (bipolar)

1414

566

Maximum isolation working voltage

AC voltage; Time dependent dielectric breakdown (TDDB)

Test

1000

400

DC voltage

1414

566

Maximum transient isolation voltage

t = 60 s (qualification)

t= 1 s (100% production)

8000

3600

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

8000

4000

Method a, After Input/Output safety test subgroup 2/3,

≤5

≤5

pC

Method a, After environmental tests subgroup 1,

≤5

≤5

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

preconditioning (type test)

≤5

≤5

~1

~1

pF

Ω

Pollution degree

2

2

Climatic category

55/125/21

55/125/21

UL 1577

Maximum withstanding isolation voltage

5000

2500