AIF04ZPFC-02NTL Astec Power, AIF04ZPFC-02NTL Datasheet - Page 18

• Manufacturer Part Number: AIF04ZPFC-02NTL
• Manufacturer: Astec Power

8
9
Input Undervoltage Protection
An input undervoltage protection circuit protects the module under low input voltage conditions. Hysteresis is built into the
PFC Series module to allow for high levels of variation on the input supply voltage without causing the module to cycle on
and off. PFC modules will operate when the input exceeds 85Vac and turn off below 63Vac.
Input Fusing
ASTEC modules do not have an in-line fuse fitted internally. In order to comply with CSA, VDE and UL safety regulations
it is recommended that a fuse of 250Vac, 15A be fitted at the module’s input.
Output Capacitor
The PFC requires an output hold-up capacitor of between 470uF and 3000uF to prevent the module from disabling due to
fluctuations in output voltage. Ideally the capacitor should be connected directly to the PFC output pins. If this is not
possible the connection must be less than 50mm from the pins.
Selecting an External Output Capacitor
The output capacitor value is determined by the following factors :
1. RMS ripple current.
2. Peak-to-peak output ripple voltage.
3. Hold-up time.
4. Expected lifetime of the capacitor.
MODEL : AIF -
March 2006 REVISION 09
16
+O/P
-O/P
1
PFC Series
<50mm
+
3000µF
470to
Output
toload
Technical Reference Note
AIF - PFC Power Factor
Correction Series
SH 18 of 31