Wiseman MMA 2 kV / 2 W Miniature High-Voltage Power Supply Module

Overview

The Wiseman MMA 2 kV / 2 W Miniature High-Voltage Power Supply Module is a precision-engineered DC/DC converter designed for demanding low-noise, high-stability applications in analytical instrumentation. Based on zero-current resonant topology and proprietary high-voltage insulation design, the MMA series delivers regulated high-voltage output with exceptional temporal stability and minimal electromagnetic interference. It operates on a fixed or configurable low-voltage DC input (standard 12 V ±0.5 V), converting it to a precisely controlled, adjustable high-voltage DC output—up to 2 kV—with maximum continuous power of 2 W. Its compact cylindrical form factor (Ø30 × 15 × 12 mm) and PCB-mount configuration make it ideal for space-constrained OEM integration in mass spectrometers, photomultiplier tube (PMT) detectors, electron optics systems, and radiation detection platforms. The module is not intended as a standalone benchtop instrument but as a certified subsystem compliant with fundamental safety and electromagnetic compatibility expectations for embedded use in Class I laboratory equipment.

Key Features

• Regulated high-voltage output up to 2 kV with selectable polarity (positive or negative)
• Ultra-low output ripple and noise: ≤5 mV_P-P under full-load conditions at maximum voltage
• High short-term stability: ≤0.001% per hour (typical), validated under constant thermal load
• Low temperature coefficient: 15 ppm/°C (equivalent to 0.0015% per °C), ensuring consistent bias across ambient shifts
• Six-side conductive shielding minimizes radiated and conducted EMI—critical for signal integrity in PMT and mass analyzer environments
• Comprehensive protection suite: reverse-input polarity, overvoltage lockout, current-limiting foldback, arc detection with automatic recovery, and latch-off short-circuit response
• Analog voltage control interface (0–5 V) with 100 kΩ input impedance enables seamless integration into closed-loop feedback systems
• Robust mechanical design: shock- and vibration-resistant construction validated per IEC 60068-2-6 (vibration) and IEC 60068-2-27 (shock)
• Three thermal grade options: Commercial (S), Industrial (G), and Extended (T), supporting operation up to +95 °C case temperature
• OEM-customizable output voltage steps (100 V to 2 kV), control logic, and mechanical interfaces without NRE penalty

Sample Compatibility & Compliance

The MMA module is engineered for direct integration into detector biasing circuits where microampere-level current stability and sub-millivolt noise floor are essential. It is routinely deployed in OEM designs for time-of-flight (TOF) and quadrupole mass spectrometers requiring stable ion acceleration potentials; PMT-based scintillation detectors in nuclear medicine and particle physics; electrostatic lenses in SEM/TEM column assemblies; and G-M tube bias networks in portable radiation monitors. While the module itself carries no CE, UL, or RoHS certification marks (as it is a component-level product), its design adheres to core principles of IEC 61010-1 (safety requirements for electrical equipment for measurement, control, and laboratory use) and IEC 61326-1 (EMC for laboratory equipment). Final system-level compliance—including FDA 21 CFR Part 11 data integrity requirements for instrument control firmware—is the responsibility of the integrating manufacturer, though Wiseman provides traceable calibration records and design assurance documentation upon request.

Software & Data Management

The MMA module operates as an analog-controlled hardware subsystem with no embedded firmware, USB interface, or digital communication bus. All setpoint regulation and monitoring occur via passive analog signals—eliminating software dependencies, boot-time delays, or cybersecurity attack surfaces. Voltage control is achieved using a linear 0–5 V input referenced to module ground; output voltage scales linearly (e.g., 2.5 V = 50% of full-scale). For systems requiring digital supervision, third-party ADC/DAC modules (e.g., National Instruments USB-6009 or Analog Devices ADALM2000) may be used to digitize control voltage and monitor auxiliary signals such as input current or case temperature (via optional thermistor pad). Wiseman supplies detailed application notes—including layout guidelines for high-voltage creepage/clearance, grounding topology for noise rejection, and thermal derating curves—for integration into ISO 13485 or GLP-compliant development workflows.

Applications

• Photomultiplier tube (PMT) dynode chain biasing in gamma spectroscopy and flow cytometry systems
• Ion source and detector biasing in compact benchtop mass spectrometers (e.g., QMS, TOF-MS)
• Electrostatic focusing lens supply in miniature electron microscopes and ion mobility spectrometers
• High-voltage bias for proportional counters, G-M tubes, and silicon drift detectors (SDDs)
• Beam blanking and deflection electrode excitation in focused ion beam (FIB) and electron beam lithography tools
• Electrophoresis and capillary electrophoresis high-field separation stages
• OEM medical imaging subsystems including X-ray detector bias and positron emission tomography (PET) front-end electronics
• Industrial process monitoring sensors requiring stable HV bias under variable thermal loads

FAQ

Is the MMA module certified for use in medical devices?
No—the MMA is a component-grade power supply intended for integration into end-systems. Final medical device certification (e.g., IEC 62304, FDA 510(k)) must be performed by the OEM manufacturer.
Can multiple MMA modules be synchronized for phased output?
The module has no clock input or synchronization pin; outputs are independent. Phase alignment requires external timing circuitry and matched analog control signals.
What is the minimum recommended creepage distance when mounting on PCB?
For 2 kV output, Wiseman recommends ≥8 mm creepage and ≥4 mm clearance between HV traces and low-voltage nets, per IPC-2221B Level A guidelines.
Does the module support remote sensing for load regulation?
No—regulation is local to the module’s output terminals. For long cable runs, output voltage should be calibrated at the load point during system commissioning.
Is there a version with digital interface (e.g., I²C or SPI)?
Not in the standard MMA series. Wiseman offers digitally controllable HV modules (e.g., SL Series) for applications requiring programmable setpoints and telemetry.