8

ISO7710

SLLSER9A – NOVEMBER 2016 – REVISED DECEMBER 2016

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6.8 Safety Limiting Values

Safety limiting 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

DW-16 Package

Safety input, output, or supply

current

see Figure 1

241

mA

see Figure 1

368

see Figure 1

482

Safety input, output, or total

power

1324

mW

Maximum safety temperature

150

°C

D-8 Package

Safety input, output, or supply

current

see Figure 3

156

mA

see Figure 3

238

see Figure 3

311

Safety input, output, or total

power

856

mW

Maximum safety temperature

150

°C

The maximum safety temperature is the maximum junction temperature specified for the device. 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.