AN2208 datasheet(37/51 Pages) STMICROELECTRONICS

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AN2208

7 Test results

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If input lines are grounded, the optocoupler will switch on during the test because the inducted

voltage is too high. This is a normal reaction and when the test finishes, the optocoupler works

normally.

Test result: The VN808 HSD worked properly during the test.

Note:

B means a temporary degradation or loss of function or performance, with an automatic return

to normal operation.

7.2

VN340SP HSD test results

7.2.1

Load switching test results

Test conditions: TAMB = 25° C, VCC = 24 V, f = 0.5 Hz

Switching loads: Lamp = 24V, 15W; Inductor L = 130 mH, RLOAD = 48Ω

Test result: The VN340SP HSD worked properly during the test.

Figure 44 to Figure 49 show the waveforms during the load switching tests.

If input is ON, the output will switch off immediately if GND_Power is disconnected. If the input

is OFF, the output remains OFF.

7.2.2

Thermal stress test results

All channels shorted: fSWITCH = 0.5 Hz, VCC = 28V, duration 72 hours, TA = 25°C.

All channels shorted: fSWITCH = 0.5 Hz, VCC = 28V, duration 8 hours, TA = 85°C.

All channels shorted: fSWITCH = 0.5 Hz, VCC = 28V, duration 8 hours, TA = –25°C.

Test result: The VN340SP HSD worked properly during the test.

The maximum temperature with 4 channels shorted is 156°C with an ambient temperature of

25°C and 159°C with an ambient temperature of 85°C. Figure 50 and Figure 51 show behavior

during the thermal stress tests.

Table 8.

EMC test IEC 61000-4-6 conducted immunity test results (VN808 RDB)

IEC 61000-4-6

Test Condition

VN808 RDB 1/2

VN808 RDB 2/2

Power supply

Input ON

10V OK

Input OFF

10V OK

Switch @ 1Hz

10V OK

Output

Input ON

10V OK

Input OFF

10V OK

Switch @ 1Hz

10V OK

Input

Input ON

10V OK

Input OFF

10V OK B

Switch @ 1Hz

10V OK

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