The Kepco BOP20-20M is a 400 W bipolar operational amplifier power supply engineered for precision voltage and current control across positive and negative ranges. Operating as both a fully rated power supply and high-powered op-amp, it sources and sinks 100% of rated current without polarity switching through zero. This unit excels in dynamic test and simulation environments demanding agile voltage control, particularly with resistive loads where its high-speed architecture—absence of output capacitors—delivers optimal performance. Voltage mode offers 10 kHz bandwidth and 35 μS rise/fall time. Current mode performance adjusts based on load characteristics. The design passes bidirectional current and voltage , making it ideal for motor testing, magnetic component analysis, and industrial process control.
## Technical Specifications
• **Output Power:** 400 W
• **Voltage Range:** 0 to ±20 V
• **Current Range:** 0 to ±20 A
• **Voltage Mode Bandwidth:** 10 kHz (DC to f-3dB)
• **Voltage Mode Rise/Fall Time:** 35 μS (10%–90%, short-circuit)
• **Closed-Loop Voltage Gain:** 2.0 V/V
• **Closed-Loop Current Gain:** 2.0 A/V
• **Series Resistance:** 20 µΩ
• **Series Inductance:** 10 µH
• **Shunt Resistance:** 20 kΩ
• **Shunt Capacitance:** 0.5 µF
## Key Features
• Bipolar sourcing and sinking at full rated current
• Smooth linear control through zero without switching transients
• High-speed response optimized for resistive loading
• Zeroable preamplifier for signal scaling and summing
• 50-terminal userport for direct access to all controls and flag signals
## Load Compatibility
• **Resistive Loads:** Primary design focus for maximum speed and stability
• **Capacitive Loads:** Standard unit stable to 0.1 µF; modified versions (BOP20-20MC, BOP20-20DC) rated to 10 mF
• **Inductive Loads:** User-accessible output terminals enable current-mode optimization; modified versions (BOP20-20ML, BOP20-20DL) handle inductive loads to 1 H and R-L series combinations
## Integration Options
Optional BIT cards support Ethernet control (LXI Version 1.4 compatible), GPIB, and RS 232 interfaces for remote operation and integration into automated test systems.
