POWER SUPPLY DESIGN EXCELLENCE

PXHU Series hold-up modules provide a state-of-the-art solution to the problem of temporarily maintaining electronic systems in operation during input bus drop-out or fail. These module provide a solution to reduce the amount of capacitance needed by charging the hold up capacitor at a high voltage (typical 38VDC) while limiting the input surge current. PXHU Series hold-up modules is a high performance module designed for aerospace, high reliability and high-end industrial applications.

The modules are potted with a high performance thermal conductive compound and packaged in a metal case to ensure the module’s integrity under extreme environmental conditions. The module is connected between the source and DC/DC converter, and can be used with 16-40VDC input voltage.

PXHU Series modules features 3 modes of operation:
• Charging mode: Normal input voltage is 16 to 40V. When the input voltage reaches the start-up charge threshold (set at 1V above fail voltage), the hold-up module begins to charge the external capacitor at 38VDC while powering the DC/DC converter.
• Normal mode: In normal mode, with the capacitor charged and the input bus between the output power fail voltage and 40VDC, the module operates continuously until the input voltage drops below the power fail voltage threshold.
• Power fail mode: When the input voltage drops below the power fail voltage threshold, the hold-up module disconnects the input from the output and internally connects the hold-up capacitor to the output.

• UNIQUE PRODUCTS FOR HOLD-UP
SOLUTION
• HIGH EFFICIENCY
• COMPATIBLE WITH 16-40V DC/DC
CONVERTERS
• HERMETICALLY SEALED CASE
• WIDE OPERATING TEMPERATURE
RANGE
• UP TO 120 WATTS