PBXX-30/24AC (series)
PBX-30/24AC

Ibex Manufacturing, Inc.

Operating Ratings
AC Line Voltage (note 1)
DC Line Voltage (note 2)
DC Line Current (note 3)
Isolation from Ground (note 4)
Output Short Circuit Duration
AC Line Frequency (Min. & Max.)
Operating Temperature
Storage Temperature
MTBF (Calculated)

 		21.6VRMS - 26.4VRMS
9VDC - 36VDC
3.0A
150V peak
Continuous
50Hz - 400Hz
-40C to +85C
-55C to +105C
150,000 Hours (25C)
Parameter Conditions Minimum Maximum Units
Max. Output Current (Note 5) Each output 3.0 3.5 A
Min. Load Current (Note 6) Each output 15 - mA
Output Ripple & Noise (Note 7) Before extra filtering - 100 mV pk-pk
Output Ripple & Noise After extra filtering - 20 mV pk-pk

Note 1: The supply is designed to be powered by a 24VAC, 56VA transformer for 30W output power at +85C or 40W at +45C. A 16V, 40VA wall-cube transformer may be used if maximum output power is 20W and maximum output voltage is 15V.

Note 2: The DC voltage (if used) must be at least 10% above the highest output voltage - not to exceed 36V.

Note 3: The average DC input current (if used) should not be allowed to greatly exceed 3A - especially at high ambient temperatures. Short-term current bursts of up to 5A are permissible.

Note 4: This assumes the board is mounted on metal standoffs with #6 screws. If 3/8" nylon standoffs and #6 nylon screws are used, the isolation is 4,000V peak or the isolation rating of the transformer or DC source - whichever is less. This also assumes that a 3/8" air clearance is maintained around the board's heatsinks and other components.

Note 5: The regulator circuit automatically limits the output current to 3.0 - 3.5A. This current value may not be possible however, if the total output power exceeds 30W at +85C or 40W at +45C.

Note 6: A minimum load current of 15mA is required to maintain regulation.

Note 7: There is an extra-filtered output available for each voltage. The resistance of the filter is approximately 0.05 ohms which gives the choice between lower ripple and tighter regulation.


[ General ] [ Operation ] [ Mechanical ]
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