Kepco BOP-500M High Voltage Bipolar Operational Power Supply / Amplifier

The Kepco BOP-500M is a high-voltage bipolar operational power supply and amplifier delivering ±500 V and ±80 mA across all four quadrants. It sources and sinks current without polarity switching, enabling bidirectional power flow in demanding precision applications. With 40 W total output capacity, the unit combines low output impedance (0.05 Ω DC resistance in voltage mode) and exceptional stability - load effect under 0.0005% in voltage mode, temperature coefficient below 0.01% per °C, and 8-hour drift less than 0.01% of setting.

Technical Specifications Output Ranges

Voltage: −500 V to +500 V

Current: −80 mA to +80 mA

Total Power: 40 W Output Impedance (Voltage Mode)

DC Resistance: 0.05 Ω

Series Inductance: 5 mH Output Impedance (Current Mode)

Shunt Resistance: 100 MΩ

Shunt Capacitance: 0.3 µF Control Channels

Voltage Control Gain: 50 V/V, 150 kHz bandwidth

Current Control Gain: 8.0 mA/V, 2 kHz bandwidth Stability & Performance

Load Effect (Voltage Mode): <0.0005% of setting

Load Effect (Current Mode): <0.005% of setting

Source Effect: <0.0005% of setting (both modes)

Temperature Coefficient: <0.01% per °C (both modes)

8-Hour Drift: <0.01% of setting (both modes)

Voltage Mode Noise (RMS): <10 mV

Voltage Mode Ripple & Noise (20 Hz–10 MHz): <200 mV p-p

Current Mode Noise (RMS): <25 µA

Current Mode Ripple & Noise (20 Hz–10 MHz): <500 µA p-p Preamplifier Offsets

Voltage Mode: <5 µV

Current Mode: <1 nA Reference Accuracy

Both modes: <0.0005% Environmental

Operating Temperature: −20°C to +65°C

Storage Temperature: −40°C to +85°C

Cooling: Natural convection Power

Input: 105–125 V AC or 210–250 V AC, selectable; 50–65 Hz

Consumption: Approximately 250 W

Power Factor: 0.8 Isolation

Output and programming terminals: Floating, no DC connection to chassis

Common terminal: Operates up to 500 V (DC or peak AC) off ground

Common mode leakage: <50 µA (rms) or <5 mA (p-p) at 115 V AC, 60 Hz

Key Features

Four-quadrant operation: source and sink across full voltage and current range

Dual control channels support independent local or remote programming

Analog and resistance-based remote programming

Floating output with high ground isolation

Ultra-low offset and exceptional load regulation

Typical Applications Precision signal conditioning, transducer excitation, servo control loops, and closed-loop test systems requiring bidirectional power amplification and stable DC bias.

Compatibility & Integration Analog control inputs accept voltage or resistance signals. Two independent channels enable simultaneous voltage and current command via front-panel or remote terminals.