7

UCC20225

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6.7 Safety-Related Certifications

VDE

CSA

UL

CQC

Certified according to DIN V VDE V

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

and DIN EN 61010-1 (VDE 0411-

1):2011-07

Approved under CSA Component

Acceptance Notice 5A, IEC 60950-1,

and IEC 61010-1

Certified according to UL

1577 Component

Recognition Program

Certified according to

GB4943.1-2011

Basic Insulation Maximum Transient

Maximum Surge Isolation Voltage,

Basic insulation and Reinforced

insulation per CSA 60950-1-

07+A1+A2 and IEC 60950-1 2nd

Ed.+A1+A2;Basic insulation per

CSA 61010-1-12 and IEC 61010-1

3rd Ed.

Basic Insulation,

Altitude

≤ 5000 m,

Tropical Climate,

Agency Qualification Planned

Agency Qualification Planned

Agency Qualification Planned Agency Qualification Planned

6.8 Safety-Limiting Values

Safety limiting intends to prevent potential damage to the isolation barrier upon failure of input or output circuitry. A failure of

the I/O can allow low resistance to ground or the supply and, without current limiting, dissipate sufficient power to overheat

the die and damage the isolation barrier potentially leading to secondary system failures.

PARAMETER

TEST CONDITIONS

SIDE

MIN

TYP

MAX

UNIT

Safety output supply

current

See Figure 2

DRIVER A,

DRIVER B

50

mA

DRIVER A,

DRIVER B

24

mA

Safety supply power

See Figure 3

INPUT

0.05

W

DRIVER A

0.60

DRIVER B

0.60

TOTAL

1.25

Safety temperature

150

°C

The safety-limiting constraint is the maximum junction temperature specified in the datasheet. The power

dissipation and junction-to-air thermal impedance of the device installed in the application hardware determines

the junction temperature. The assumed junction-to-air thermal resistance in the Thermal Information table is that

of a device installed on a high-K test board for leaded surface-mount packages. The power is the recommended

maximum input voltage times the current. The junction temperature is then the ambient temperature plus the

power times the junction-to-air thermal resistance. More detailed information about junction temperature

prediction can be found in Estimating Junction Temperature