This is a prototype, small, precision high voltage power supply designed for use in the Infrared Imaging System of the M1 tank. It is designed for survival in a high-radiation environment and employs no CMOS logic and only specially-selected or approved parts.
Power Consumption and size were the primary constraints, so this unit employs an unusual resonant push-pull converter driven from a buck regulator. A special output transformer permits resonant operation at around 20KHz, while resonant operation recycles energy stored in the transformer’s secondary stray capacitance.
SPECIFICATIONS
Electrical
Input:
- Voltage 29VDC, or +14.5V. Input voltage (s) may vary +10% without affecting output.
- Current 270mA max
Output:
Anode:
- Voltage 18KV fixed output (+0.5%)
- Current 200µA nominal, 350µA max
- Regulation +0.2% load, +0.2% line
- Ripple 12V p-p, maximum
Focus:
- Voltage 2700-3200V, adjustable
- Current 100µA nominal, 300µA max
- Regulation +0.5% load, +0.5% line
- Ripple 10V p-p, maximum
G2:
- Voltage 100-600V adjustable
- Current 0µA nominal, +5µA max
- Regulation +5% load, +0.5% line
- Ripple 0.5V p-p, maximum
Protection Circuits
- Output Overload
Supply protected against excessive load on output - Short Circuit
Protected against output shorts for an indefinite time - Reverse Polarity
Inputs protected against reverse polarity
Environmental
- Operating Temperature -32ºC to +85ºC
- Humidity To 100%, (fully sealed construction)
- Shock 30 G’s
- Vibration Per MIL-STD-810, Method 514, Category F
- Altitude 50,000 feet, tested for 200 hours
Construction: Sealed aluminum case, machined from solid billet
- Weight 1.2 lbs. max
- Marking Photo anodized onto aluminum lid
- Potting Vacuum filled silicone