Specifications

12
1-800-927-9474
20-5
PFC Interface Connections (cont)
Auxiliary Vcc +5V/0.3A (J10-9)
The Vcc on J10-9 is an auxiliary 5V regulated power source. It is +5Vdc +/–5% with respect to
Signal Ground, and can supply 300 mA maximum. It is short circuit proof, but if shorted all
outputs will shut down through the Enable/Disable circuitry.
The Auxiliary Vcc is typically used with the Power Good circuitry to provide a pull-up
reference for the outputs of the DC Power Good circuit on a ModuPAC (Figure 5, below). If
used for this purpose, then the Signal Ground on J10-10 must also be connected to the J3-4
Signal Ground pin of the ModuPAC.
PFC MegaPAC Output Power Derating
78M05
Auxiliary Vcc
9
0.1 µF
Signal Ground
J10
10
+5V/300 mA
Figure 5.
Auxiliary Vcc
Figure 6.
Maximum
Output Power vs.
AC Input Voltage
Figure 7.
Maximum
Output Power vs.
DC Input Voltage
1400
1200
1000
100
(Min. Input)
125 150
200
300
250
350
Output Power (Watts)
Safe Operating Area
1600W @ 150Vdc
Input Voltage (Vdc)
PFC MegaPAC Output Power vs. Input Voltage (Vdc)
1600
380
(Max. Input)
1500
1300
1350
1100
Power
Exceeded
Derate at 10Watts/Volt
1400
1200
1000
85
100 125
145
150 175
200
225
250
264
Output Power (Watts)
1600W @ 145Vac
Input Voltage (Vac)
PFC MegaPAC Output Power vs. Input Voltage (Vac)
1600
Derate at 10 Watts/Volt
105
Power
Exceeded
Safe Operating Area
MegaPAC™ Family AC-DC, DC-DC Switchers