Kepco ATE55-20M

The Kepco ATE55-20M is a 1000-watt DC power supply built for precision analog control in laboratory and industrial environments. It delivers adjustable voltage and current outputs from 0–55 VDC and 0–20 ADC, with exceptional load regulation and ultra-low ripple. The series-pass architecture with automatic crossover switching provides low output impedance in voltage mode (1.1 mΩ slow, 2 μH fast) and high impedance in current mode, making it suitable for transient testing, device characterization, and signal-following applications.

## Technical Specifications

• Output: 0–55 VDC, 0–20 ADC (1 kW maximum)
• Voltage programming bandwidth: 4.0 kHz minimum; time constant 40 μsec maximum
• Ripple and noise (slow mode): <0.1 mV RMS, <1 mV peak-to-peak
• Ripple and noise (0–6 mA load effect): 0.3 mV RMS, 3 mV peak-to-peak
• Load regulation (voltage mode): <0.0005% of Eomax
• Source voltage effect (voltage mode): <0.0005% of Eomax
• 8-hour drift: <0.005% Eomax (voltage mode), <0.01% Iomax (current mode)
• Output impedance (voltage mode): 1.1 mΩ (slow), 2 μH (fast)
• Output impedance (current mode): 20 μH (slow), 110 kΩ (fast)
• Output capacitance: 5,200 μF (slow), 2.25 μF (fast)

## Key Features

• Series-pass regulator with automatic voltage/current mode crossover
• Local control via 10-turn rheostats; optional locking screw-driver adjustable controls
• Remote analog programming with 0–10V signal
• Two uncommitted amplifiers for signal conditioning
• Optically isolated TTL-compatible mode flag signal
• Remote error sensing terminals
• Output capacitor connection directly at load
• Full-rack form factor: 6.969" H × 19.000" W × 19.874" D
• Natural convection cooling

## Control and Integration

• Multi-terminal user port for jumper-based configuration
• Optional digital display or GPIB digital programming modules
• Analog remote control with programmable overvoltage crowbar
• Rear connector access for all control and flag signals