Safety limiting intends to minimize potential damage to the isolation barrier upon failure of input or output circuitry.
| PARAMETER |
TEST CONDITIONS |
MIN |
TYP |
MAX |
UNIT |
| IS |
Safety input, output,
or supply current |
RθJA = 94°C/W, TJ = 150°C, TA = 25°C,
AVDD = DVDD = 5.5 V |
|
|
242 |
mA |
RθJA = 94°C/W, TJ = 150°C, TA = 25°C,
AVDD = DVDD = 3.6 V |
|
|
369 |
| PS |
Safety input, output,
or total power(1) |
RθJA = 94°C/W, TJ = 150°C, TA = 25°C |
|
|
1330 |
mW |
| TS |
Maximum safety temperature |
|
|
|
150 |
°C |
(1) The maximum safety temperature, T
S, has the same value as the maximum junction temperature, T
J, specified for the device. The I
S and P
S parameters represent the safety current and safety power, respectively. Do not exceed the maximum limits of I
S and P
S. These limits vary with the ambient temperature, T
A.
The junction-to-air thermal resistance, R
θJA, 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:
T
J = T
A + R
θJA × P, where P is the power dissipated in the device.
T
J(max) = T
S = T
A + R
θJA × P
S, where T
J(max) is the maximum junction temperature.
P
S = I
S × AVDD
max + I
S × DVDD
max, where AVDD
max is the maximum high-side voltage and DVDD
max is the maximum controller-side supply voltage.