6.8 Safety-Related Certifications

VDE

UL

UL

UL

Plan to certify according to DIN EN

IEC 60747-17 (VDE 0884-17)

Plan to certify under UL 1577 / CSA

Component Recognition program

Plan to certify according to IEC

62368-1

Plan to certify according to IEC 60601-1

Certificate number: (planned)

Certificate number: (planned)

File number: (planned)

Certificate number: (planned)

6.9 Safety Limiting Values

Safety limiting(1) intends to minimize 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

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

PARAMETER

TEST CONDITIONS

MAX

UNIT

IS

Safety input, output or supply current

RθJA = 59.7°C/W, VVINP = 5.5V, TJ = 150°C, TA =

25°C, POUT = 1.9W

726

mA

RθJA = 59.7°C/W, VVINP = 3.0V, TJ = 150°C, TA =

25°C, POUT = 0.75W

948

mA

PS

Safety power dissipation (input power - output

power)

RθJA = 59.7 °C/W, TJ = 150 °C, TA = 25 °C

2.1

W

TS

Safety temperature

150

°C

(1)

The maximum safety temperature, TS, has the same value as the maximum junction temperature, TJ, specified for the device. The

IS and PS parameters represent the safety current and safety power respectively. The maximum limits of IS and PS should not be

exceeded. These limits vary with the ambient temperature, TA.

The junction-to-air thermal resistance, RθJA, in the Thermal Information table is that of a device installed on a high-K test board for

leaded surface-mount packages. Use these equations to calculate the value for each parameter:

TJ = TA + RqJA × P, where P is the power dissipated in the device.

TJ(max) = TS = TA + RθJA × PS, where TJ(max) is the maximum allowed junction temperature.

PS = IS × VVINP, where VVINP is the maximum input voltage.

UCC33020

SLUSFK4A – FEBRUARY 2025 – REVISED MAY 2025

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