5.7 Safety-Related Certifications

VDE

UL

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

EN IEC 60747-17,

DIN EN IEC 62368-1 (VDE 0868-1),

EN IEC 62368-1,

IEC 62368-1 Clause : 5.4.3 ; 5.4.4.4 ; 5.4.9

Recognized under 1577 component recognition and

CSA component acceptance NO 5 programs

Reinforced insulation

Single protection

Certificate number: 40040142

File number: E181974

5.8 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 overheat

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

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

IS

Safety input, output, or supply current

RθJA = 102.8°C/W,

VDD1 = VDD2 = 5.5 V,

TJ = 150°C, TA = 25°C

220

mA

RθJA = 102.8°C/W,

VDD1 = VDD2 = 3.6 V,

TJ = 150°C, TA = 25°C

340

PS

Safety input, output, or total power

RθJA = 102.8°C/W,

TJ = 150°C, TA = 25°C

1220

mW

TS

Maximum 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. Do not exceed the maximum limits of IS and PS. 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 + RθJA × P, where P is the power dissipated in the device.

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

PS = IS × AVDDmax + IS × DVDDmax, where AVDDmax is the maximum high-side voltage and DVDDmax is the maximum controller-side

supply voltage.

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