UCC21520 datasheet(6/45 Pages) TI1

Part #	UCC21520

Description	Isolated Dual-Channel Gate Driver

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UCC21520

SLUSCJ9A – JUNE 2016 – REVISED JUNE 2016

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(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.

6.6 Insulation Specifications

PARAMETER

TEST CONDITIONS

VALUE

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 insulation

Distance through internal isolation (internal clearance)

>21

µm

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

≤ 600 VRMS

I-IV

Rated mains voltage

≤ 1000 VRMS

I-III

DIN V VDE 0884-10 (VDE V 0884-10): 2006-2012(2)

VIORM

Maximum repetitive peak

isolation voltage

AC voltage (bipolar)

2121

VPK

VIOWM

Maximum isolation working

voltage

Time dependent dielectric breakdown (TDDB) test, (See

Figure 1)

1500

VRMS

2121

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 = 12800 VPK (qualification)

8000

VPK

qpd

Apparent charge(4)

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

VIOTM, tini = 60s;

Vpd(m) = 1.2 X VIORM = 2545 VPK, tm = 10s

<5

pC

Method a, After environmental tests subgroup 1. Vini = VIOTM,

tini = 60s;

Vpd(m) = 1.6 X VIORM = 3394 VPK, tm = 10s

<5

Method

b1;

At

routine

test

(100%

production)

and

preconditioning (type test)

Vini = VIOTM; tini = 1s;

Vpd(m) = 1.875 * VIORM = 3977 VPK , tm = 1s

<5

CIO

Barrier capacitance, input to

output(5)

VIO = 0.4 sin (2πft), f =1 MHz

1.2

pF

RIO

Isolation resistance, input to

output

VIO = 500 V at TA = 25°C

> 1012

Ω

VIO = 500 V at 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

VTEST = VISO = 5700 VRMS, t = 60 sec. (qualification),

VTEST = 1.2 × VISO = 6840VRMS, t = 1 sec (100% production)

5700

VRMS

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