The top waveform shows V
IN
swinging from -2V to +10.7V, approximately.
The bottom waveform shows the collector voltage falling from +30V to 0V with a 10%-
90% transition time of 840 ns. This is t
ON
, the turn-on time. MIL-PRF-19500/464G
specifies t
ON
to be 1.5 us or less, so this particular device meets the test requirements.
An On Semi 2N5686G (datecode BM1129) transistor was used for this test.
TURN-OFF TEST
As with the turn-on test, Table 1 of MIL-PRF-19500/464G specifies that the turn-off
tests should be performed with a forward base current of +2.5A. This corresponds to a
V1 setting for V
PULSE
of:
V1 ≈ (R
OUT
+ 4Ω) × 2.5A + 0.7V = +135.7V
Under these conditions, the voltage at V
IN
will be approximately:
V
IN
≈ (4Ω × 2.5A) + 0.7V = +10.7V
The reverse base current is specified to be -2.5A for the turn-off test. This corresponds
to a V2 setting for V
PULSE
of:
V2 ≈ (R
OUT
+ 4Ω) × -2.5A = -135V
With the PRF set to 10 Hz, PW1 set to 10 us, PW2 set to 30 us, and a 10 us delay
setting, the following waveforms are obtained for V
CURR-MON
and V
OUT
:
26
Summary of Contents for AVR-D3-B
Page 36: ...PCB 158R5 LOW VOLTAGE POWER SUPPLY ...
Page 37: ...PCB 168C HIGH VOLTAGE POWER SUPPLY ...
Page 38: ...PCB 228C NEGATIVE UV CONTROL PCB ...
Page 39: ...PCB 241C DUAL PW PCB ...
Page 40: ...PCB 335A DUAL TRIGGER ENCODER ...
Page 41: ...PCB 104G KEYPAD DISPLAY BOARD ...
Page 43: ...PERFORMANCE CHECK SHEET ...