The Kepco BOP20-20M is a four-quadrant bipolar operational power supply engineered for dynamic test and simulation applications requiring precise voltage and current control. This 400 W unit sources and sinks 100% of its rated current across ±20 V and ±20 A, enabling seamless AC waveform replication and agile voltage outputs without polarity switching. Independent voltage and current control circuits with automatic crossover ensure operation across the full output range. The unit is optimized for resistive loads; capacitive and inductive load variants are available. Its low output impedance—20 µΩ series resistance and 10 µH series inductance in voltage mode, 20 kΩ shunt resistance and 0.5 µF shunt capacitance in current mode—supports high-fidelity signal reproduction. Standard BOP20-20M performance includes 75 µS voltage mode rise/fall time and 72 µS current mode rise/fall time with 4.9 kHz current mode bandwidth. Not designed as a general-purpose supply due to minimal output energy-storage capacitance.
## Technical Specifications
• Voltage Range: ±20 V
• Current Range: ±20 A
• Power Output: 400 W
• Output Configuration: Bipolar, four-quadrant sourcing and sinking
• Output Impedance (Voltage Mode): 20 µΩ series resistance, 10 µH series inductance
• Output Impedance (Current Mode): 20 kΩ shunt resistance, 0.5 µF shunt capacitance
• Voltage Mode Rise/Fall Time: 75 µS (typical)
• Current Mode Rise/Fall Time: 72 µS
• Current Mode Bandwidth: 4.9 kHz
## Key Features
• Four-quadrant operation with 100% source and sink current capability
• Separate voltage and current control with automatic crossover
• Smooth zero-crossing transitions without polarity switching
• Modified configurations available: BOP20-20MC/DC for capacitive loads to 10 mF, BOP20-20ML/DL for inductive loads to 1 H
• Standard unit operates stably with resistive loads; operation with capacitive loads exceeding 0.1 µF may require feedback capacitance adjustments
## Typical Applications
• AC waveform replication and signal simulation
• Dynamic component and subsystem testing
• Voltage and current transient generation
• High-speed bidirectional power delivery
## Compatibility & Integration
User port terminals support optimization of current-mode stability with inductive loads. Modified models (MC/DC and ML/DL variants) provide enhanced performance with reactive loads.
