24-12-3 DC Converter

Convert 17-32 VDC input to 12 VDC negative ground output for powering communication and navigation equipment on negative ground systems. (See Isolated Series for positive ground applications.)

Features:

• Excellent Regulation: Output voltage maintained within 1% under all line and load conditions within the rating
• The heat generated by semi-conductors is extracted and dissipated by large heat sink fins that maximize air contact for cool operation and the long life of components
• Polyurethane conformal coating on PC boards and corrosion-resistant anodized aluminum cases with heavy-duty shock mounts assure survival in hostile environments

Numerous Converter and Load Protection Circuits:

• Current limiting
• Automatic thermal shutdown
• Short circuit proof
• Reverse polarity
• Overvoltage protection
• Carries CE mark

Specifications:

• Input Voltage: 17-32
• Output Voltage: 13.6
• Output Amps (Intermittent): 3
• Output Amps (Continuous): 3
• Case Size (H x W x D): 3.5 x 3.5 x 1.75 inches (8.9 x 8.9 x 4.5 centimeters)
• Weight: 1 lb. (.45 kg)
• Output: 13.6 VDC (internally adjustable 12.6 -14.5) 
• Ripple: 150 mV P-P maximum
• Regulation: 1% Line/Load
• Switching Frequency: 40 kHz
• Efficiency: 85% – Typical.
• Isolation: Output/Chassis; Input/chassis: 250 VDC

Duty Cycle Ratings*:

• Intermittent: 20 minutes max on time, 20% duty. current limit set at approx. 105% of intermittent rating.
• Continuous: 24 hours, 100% duty *24-12-3: 2-minute max. on time
• Idle Current: Less than 100 mA (including power “ON” light)

Operating Temp Specifications:

• 0-50 degrees C, Derate Linearly From 100% @ 40 degrees C To 50% @ 50 degrees C.
• Thermal shutdown @ 70 degrees C Case Temperature
• Model 24-12-3: Full output -25 degrees to +30 degrees C; Derate linearly from 100% @ +30 degrees C to 45% @ +50 degrees C

Mechanical Specifications:

• Powder-coated aluminum heat sink case
• Front panel terminal block
• Heavy-duty mounting flange
• Conformal coated PC board

Options:

• Operation as battery charger or parallel redundant operation* – derate to continuous duty rating (contact factory)