6.6 Insulation Specifications

PARAMETER

TEST CONDITIONS

SPECIFIC

ATIONS

UNIT

DP-28

IEC 60664-1

CLR

External clearance(1)

Side 1 to side 2 distance through air

>8

mm

CPG

External Creepage(1)

Side 1 to side 2 distance across package surface

>8

mm

DTI

Distance through the insulation

Minimum internal gap (internal clearance)

>21

µm

CTI

Comparative tracking index

IEC 60112; UL 746A

>600

V

Material Group

According to IEC 60664-1

I

Overvoltage category

Rated mains voltage ≤ 600 VRMS

I-IV

Rated mains voltage ≤ 1000 VRMS

I-III

DIN EN IEC 60747-17 (VDE 0884-17)(2)

VIORM

Maximum repetitive peak isolation voltage

AC voltage (bipolar)

2121

VPK

VIOWM

Maximum isolation working voltage

AC voltage (sine wave); time-dependent dielectric

breakdown (TDDB) test;

1500

VRMS

DC voltage

2121

VDC

VIOTM

Maximum transient isolation voltage, ISOUSB211

VTEST = VIOTM, t = 60 s (qualification); VTEST = 1.2 ×

VIOTM, t = 1 s (100% production)

7071

VPK

Maximum transient isolation voltage, ISOUSB211B

4242

VPK

VIMP

Maximum impulse voltage, ISOUSB211(3)

Tested in air, 1.2/50-us waveform per IEC 62368-1

9800

VPK

Maximum impulse voltage, ISOUSB211B(3)

4615

VPK

VIOSM

Maximum surge isolation voltage, ISOUSB211(4)

Tested in oil (qualification test), 1.2/50-μs waveform

per IEC 62368-1

12800

VPK

Maximum surge isolation voltage, ISOUSB211B(4)

6000

VPK

qpd

Apparent charge(5)

Method a: After I/O 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;

ISOUSB211: Vpd(m) = 1.6 × VIORM, tm = 10 s

ISOUSB211B: Vpd(m) = 1.3 × VIORM, tm = 10 s

≤ 5

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

preconditioning (type test), Vini = VIOTM, tini = 1 s;

ISOUSB211: Vpd(m) = 1.875 × VIORM, tm = 1 s

ISOUSB211B: Vpd(m) = 1.5 × VIORM, tm = 1 s

≤ 5

CIO

Barrier capacitance, input to output(6)

VIO = 0.4 × sin (2 pft), f = 1 MHz

1.2

pF

RIO

Insulation resistance, input to output(6)

VIO = 500 V, TA = 25°C

> 1012

Ω

VIO = 500 V, 100°C ≤ TA ≤ 125°C

> 1011

VIO = 500 V at TS = 150°C

> 109

Pollution degree

2

Climatic category

40/125/21

UL 1577

VISO

Withstand isolation voltage, ISOUSB211

VTEST = VISO , t = 60 s (qualification); VTEST = 1.2 ×

VISO , t = 1 s (100% production)

5000

VRMS

Withstand isolation voltage, ISOUSB211B

3000

VRMS

(1)

Care must be taken during board design so that the mounting pads of the isolator on the printed-circuit board (PCB) do not reduce

creepage and clearance. Inserting grooves, ribs or both can help increase creepage distance on the PCB.

(2)

ISOUSB211 is suitable for safe electrical insulation and ISOUSB211B is suitable for basic 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 to determine the surge immunity of the package.

(4)

Testing is carried out in oil to determine the intrinsic surge immunity of the isolation barrier.

(5)

Apparent charge is electrical discharge caused by a partial discharge (pd).

(6)

All pins on each side of the barrier tied together creating a two-pin device.

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ISOUSB211

SLLSFC5B – NOVEMBER 2021 – REVISED SEPTEMBER 2022

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