6.6 Insulation Specifications

over operating ambient temperature range (unless otherwise noted)

PARAMETER

TEST CONDITIONS

VALUE

UNIT

GENERAL

CLR

External clearance (1)

Shortest pin-to-pin distance through air

≥ 8

mm

CPG

External creepage (1)

Shortest pin-to-pin 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

I-IV

I-III

DIN VDE V 0884-11 (VDE V 0884-11): 2017-01(2)

Maximum repetitive peak

isolation voltage

At AC voltage (bipolar)

1700

Maximum-rated isolation

working voltage

At AC voltage (sine wave); time-dependent dielectric

breakdown (TDDB) test

1200

At DC voltage

1700

Maximum transient

isolation voltage

6000

7200

Maximum surge

isolation voltage(3)

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

6250

Apparent charge(4)

Method a, after input/output safety test subgroup 2 / 3,

≤ 5

pC

Method a, after environmental tests subgroup 1,

≤ 5

Method b1, at routine test (100% production) and

preconditioning (type test),

≤ 5

Barrier capacitance,

input to output(5)

~3.5

pF

Insulation resistance,

input to output(5)

Ω

Pollution degree

2

Climatic category

40/125/21

UL1577

Withstand isolation voltage

4250

(1)

Apply creepage and clearance requirements according to the specific equipment isolation standards of an application. Care must 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 (PCB) do not reduce this distance. Creepage and clearance on a PCB become equal in certain cases. Techniques

such as inserting grooves, ribs, or both on a PCB 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 must 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 are tied together, creating a two-pin device.

AMC3301-Q1

SBASA73 – JULY 2020

www.ti.com

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