TDK-Lambda 203, Руководство оператора, Страница: 43 / 60

OPERATING INSTRUCTIONS
83489011 Rev A
7-19
that shuts off the output current for a short period (1ms default). Note: the
AUTOINHIBIT period is programmable between 500

s and 5ms via remote Pin 9. The
AUTOINHIBIT circuit will only detect load discharge when the output voltage falls from
between 20% and 100% of rated voltage to zero. If the load is discharged at below 20%
of rated voltage, the AUTOINHIBIT circuit will not activate and the supply will continue to
deliver current.
When the AUTOINHIBIT period is over, the supply will begin to recharge the load and
the cycle repeats. The supply will continue to operate in this manner until HV OFF is as-
serted (PIN 10=0V). See Figure 7-2 for typical remote interface waveforms.
Figure 7-2 Remote Interface waveforms for 303 operated with AUTOINHIBIT
7.2.3 Remote Operation with INHIBIT
Although the AUTOINHIBIT signal offers the user the simplest remote programming
method for the 203/303, the INHIBIT signal is commonly used to control the output cur-
rent and offers greater flexibility, allowing the user to minimize the time at which the load
capacitor remains at high voltage. The INHIBIT signal should be asserted (Pin 22=5-
15V) prior to activating the HV ON signal. Once HV ON has been set, then INHIBIT can
be removed (Pin 22=0V), and the supply will begin charging the load. A few 10s of mi-
croseconds before the load switch is triggered to close, the INHIBIT signal should be
asserted to turn-off the output current, and aid in switch recovery. Once the load switch
has recovered from the discharge event, INHIBIT can be removed and the load re-
charged. A typical set of remote control waveforms is shown in Figure 7-3.
AUTOINHIBIT
0V
15V
ENABLE
0V
10V
V
ANALOG
0V
AUTOINHIBIT
0V
15V
ENABLE
0V
10V
V
ANALOG
0V