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ZHCSI90E December 2017 – October 2019 ISO1042

PRODUCTION DATA.

6.9 Safety Limiting Values

Safety limiting⁽¹⁾ intends to minimize potential damage to the isolation barrier upon failure of input or output circuitry.

PARAMETER		TEST CONDITIONS	MAX	UNIT
DW-16 PACKAGE
I_S	Safety input, output, or supply current	R_θJA = 69.9°C/W, V_I = 5.5 V, T_J = 150°C, T_A = 25°C, see Figure 1	325	mA
		R_θJA = 69.9°C/W, V_I = 3.6 V, T_J = 150°C, T_A = 25°C, see Figure 1	496
		R_θJA = 69.9°C/W, V_I = 2.75 V, T_J = 150°C, T_A = 25°C, see Figure 1	650
		R_θJA = 69.9°C/W, V_I = 1.89 V, T_J = 150°C, T_A = 25°C, see Figure 1	946
P_S	Safety input, output, or total power	R_θJA = 69.9°C/W, T_J = 150°C, T_A = 25°C, see Figure 3	1788	mW
T_S	Maximum safety temperature		150	°C
DWV-8 PACKAGE
I_S	Safety input, output, or supply current	R_θJA = 100°C/W, V_I = 5.5 V, T_J = 150°C, T_A = 25°C, see Figure 2	227	mA
		R_θJA = 100°C/W, V_I = 3.6 V, T_J = 150°C, T_A = 25°C, see Figure 2	347
		R_θJA = 100°C/W, V_I = 2.75 V, T_J = 150°C, T_A = 25°C, see Figure 2	454
		R_θJA = 100°C/W, V_I = 1.89 V, T_J = 150°C, T_A = 25°C, see Figure 2	661
P_S	Safety input, output, or total power	R_θJA = 100°C/W, T_J = 150°C, T_A = 25°C, see Figure 4	1250	mW
T_S	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. The maximum limits of I_S and P_S should not be exceeded. These limits vary with the ambient temperature, T_A.

The junction-to-air thermal resistance, R_θJA, in the 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 allowed junction temperature.
P_S = I_S × V_I, where V_I is the maximum input voltage.