EM TEST (Switzerland) GmbH
PFM 200N100.1
User’s Guide
Ver. 1.12
24 / 43
7.1.
Test Case 1 S1 Switched, S2 Statically Open
This test simulates the interruption of the power supply to the DUT.
The DUT will not be actively discharge after
opening of switch S1.
The internal switch S2 of the PFM 200N100.1
stays open during the test.
Figure 7.4: Test Setup of Test Case 1
The discharge of the DUT will mainly depend on the impedance of the DUT. The 1 µs falling of the
voltage to 0 V at the DUT will only occur for DUTs with very low impedance for fast self-discharge
and/or small input capacitance is present.
The time for the voltage drop, seen at the DUT, will depend on its impedance. If it is high-impedance
and has a large input capacitance in the range of ten µF to mF as is common for decoupling capacitors
then only a reduction in voltage at the DUT may be seen. Therefore, it is possible that the voltage may
not fall to zero.
7.1.1. Testing with AutoWave.control Software
Select from the Standard Library the path
-
Open / Automotive / OEM / LV 124 / (2013-02) / 12V System / E-10 Short Interrupts
-
From the list, select Test Case 1 - tmin to tmax, for example,
“Test Case 1 – 100ms to 2s“
-
Open the file with
Select
Figure 7.5 shows the test window for E-10 Test
Case 1 with a sequence from 100ms to 2s for the
interruptions
Sequence 1
: One second 11.0 VDC
Sequence 2
: Sequence with dropout tests from
100ms to 2s in 100ms steps
Checking the Settings:
1
DC Test Voltage = 11.0V
2
Switch Type: All PFM internal switches are
open during the test.
3
Settings for the Test Sequence
4
Switches that will be interrupted to the DUT
(only S1P)
Click
Start
to start the test.
Figure 7.5: Test Window for the E-10 Test Case 1 Sequence
