ABCRD
FF0091
UM0024 Rev L
5
PS-1120 POWER SUPPLY OPERATION MANUAL
t=8.0ms
FIRES
±30us
HOLD-OFF
200us
0
0
OUTPUT
VOLTAGE (V)
t=0
TUBE
TIME
CHARGE
TIME(t)
FIRES
TUBE
1/f
4.0 OPERATING
CONDITIONS
4.1 ENERGY
RELATIONSHIPS
At 24V input, 600V output, the unit delivers a minimum of 20 joules per second to
the discharge capacitor. Figure 3.1 shows typical charge rate values vs output
voltage for four different DC inputs.
Figure 3. PS-1120 Typical Charge Rate Curves.
The energy per discharge is given by the expression:
J = Discharge energy
C = Discharge capacitance
V = Output voltage
Power is determined by P= J x Flashrate
Long-term (1 minute or more) average
power must be limited to 20 watts.
Therefore, the sum total of the
accumulated energy discharges
(Joules) divided by the operating
period (seconds) must be
≤
20 watts.
The flashtube may be fired any time
after the charge time (see Fig. 4).
Figure 4. Output Voltage vs. Time
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