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High Frequency Inverter Board Assembly | Best Technology
Monday, September 8th, 2025

What is high frequency inverter board? This guide covers its basics, how it works, function and application and differences from low-frequency ones through this blog.

Are you troubled with these questions?

  • Is EMC interference crashing your inverter system?
  • Does poor heat dissipation jack up costs and lower yields?
  • Is supply chain chaos delaying deliveries?

As a professional PCBA service supplier, Best Technology can provide you service and solution:

  • DFM Design—Cut costs and boost yields upfront.
  • Copper Block Cooling—Keep high-frequency operations stable.
  • 1K+ Capacity & Agile Supply—On-time delivery, guaranteed.

Welcome to contact us if you have any inquiry for inverter board PCBA service: sales@bestpcbs.com.

What Is High Frequency Inverter Board?

A high-frequency inverter board is a power electronic device that converts direct current (DC) into alternating current (AC). Its core feature is the use of high-frequency switching technology (typically above 20kHz), which rapidly switches power devices (such as MOSFETs and IGBTs) on and off to achieve power conversion. Compared to traditional low-frequency inverters (50/60Hz), high-frequency inverter boards significantly reduce device size and improve efficiency by utilizing high-frequency transformers and pulse-width modulation (PWM) technology.

What Is High Frequency Inverter Board?

How Does a High Frequency Inverter PCB Board Work?

  • DC input: DC power from batteries or solar panels enters the inverter board.
  • High-frequency inversion: Power devices (such as IGBTs) switch rapidly under the control of high-frequency PWM signals, converting DC power into high-frequency AC pulses (typically 20kHz-1MHz).
  • High-frequency transformation: High-frequency AC power is converted (stepped up or down) by a small high-frequency transformer.
  • Rectification and filtering: The high-frequency AC power output from the transformer is converted to DC power by a rectifier bridge, and then smoothed to a stable DC voltage by a filter circuit.
  • Power frequency inversion: The filtered DC power is converted to 50/60Hz AC power by an inverter circuit (such as a full-bridge or half-bridge configuration) and output to the load.
  • Feedback control: A sampling circuit monitors the output voltage and current in real time and adjusts the PWM duty cycle to maintain a stable output.
How Does a High Frequency Inverter PCB Board Work?

What Does a High Frequency Inverter Board Do?

Functions of high frequency inverter PCB board:

  • DC-AC Conversion: Converts DC power from batteries, solar panels, or other sources into 220V/50Hz or 110V/60Hz AC power for use in industrial equipment.
  • Voltage/Frequency Regulation: Utilizing PWM control technology, the output voltage and frequency are adjustable to meet varying load requirements.
  • Waveform Optimization: Utilizes sinusoidal or modified sine wave output to reduce harmonic interference and improve power quality.
  • Protection Function: Integrated overvoltage, overcurrent, short-circuit, and overheating protection mechanisms ensure safe operation.
  • Lightweight Design: The high-frequency transformer’s compact size reduces overall weight, making it easier to integrate and move.

What Is a High Frequency Inverter Circuit Board Used for?

Application of high frequency inverter circuit board:

  • New Energy – Photovoltaic micro-inverters, energy storage converters.
  • Industrial Automation – Servo drives, UPS (uninterruptible power supplies).
  • Consumer Electronics – Automotive inverters, LED driver power supplies.
  • Medical Equipment – Portable X-ray machines, laser therapy device power supplies.
What Is a High Frequency Inverter Circuit Board Used for?

Difference between Low Frequency and High Frequency Inverter Board

Comparison DimensionHigh-Frequency Inverter BoardLow-Frequency Inverter Board
Operating Frequency>20kHz50/60Hz
Transformer SizeSmallLarge
Efficiency90%-95%80%-90%
Size/WeightLightweight, 1/3-1/2 the volume of low-frequency modelsBulky, requires large installation space
Load CapacityLight loadsHeavy loads
Impact ResistanceWeakStrong
Noise Level<30dB (quiet)40-50dB (noisy)
CostHigh initial cost, long-term energy savingsLow initial cost, high energy consumption
Lifespan5-8 years10-15 years
Application Scenariossolar energy storage      industrial heavy-duty use

Why Choose Best Technology as Invert Board Assembly Manufacturer?

Reasons why choose us as high frequency invert board assembly manufacturer:

  • High-Precision Automated Assembly – We use SMT for ±0.02mm placement accuracy, reducing manual errors by 90% and boosting first-pass yield to 99.8% to lower your repair costs.
  • Flexible Modular Production – Switch from small batches (MOQ 50pcs) to mass production, converting prototypes to volume in 24-72 hours to speed up your product launch.
  • Eco- friendly & Lead-Free Compliance – Fully RoHS/REACH-compliant with halogen-free solder and nitrogen reflow ovens, ensuring faster time to market.
  • Dual X-Ray + AOI Inspection: Real-time checks on solder voids (<5%) and component polarity, covering 100% of hidden joints (BGA/QFN) to catch 95% of defects early.
  • IP67 Protective Coating: Optional silicone/acrylic/polyurethane layers withstand -40°C~150°C, cutting salt/moisture/dust failures by 70% to extend outdoor product life.
  • Extreme Stress Testing: 72-hour full-load testing under -20°C~85°C cycles ensures <0.1% field failure rates for rock-solid reliability.
  • Component Traceability: QR codes track every supplier, date, and test result from wafer batch to assembly for instant failure analysis and quality control.
  • Free DFM Optimization: Our free report suggests 20+ cost-saving design tweaks (e.g., pad spacing, layout) to cut your assembly expenses by an average of 15%.

Below is a photo of inverter board we assembled:

Why Choose Best Technology as Invert Board Assembly Manufacturer?

Our PCB Assembly Capabilities

ItemCapabilities
Placer Speed13,200,000 chips/day
Bare Board Size0.2 × 0.2 inches – 20 × 20 inches / 22 × 47.5 inches
Minimum SMD Component01005
Minimum BGA Pitch0.25mm
Maximum Components50 × 150mm
Assembly TypeSMT, THT, Mixed assembly
Component PackageReels, Cut Tape, Tube, Tray, Loose Parts
Lead Time1 – 5 days

How to Get a Quote for Invert Board Assembly Service?

1. Core Design Documents

  • PCB Production Files: Gerber files (including drill drawings); Impedance control requirements.
  • BOM List: Full component list (model, package, manufacturer PN); Alternative part options clearly marked.
  • Assembly Drawing: Component polarity markings; Heat sink mounting positions; Glue/potting points.

2. Process Specifications

  • Soldering Method: Reflow / Wave / Selective soldering.
  • Special Processes: Conformal coating areas; Potting thickness requirements; X-ray inspection points.
  • ESD Protection: Compliance standard (e.g., ANSI/ESD S20.20).

3. Material Supply Options

  • Customer-provided all materials.
  • Assembler provides common parts (resistors/caps, etc.).
  • Key component sourcing requirements (e.g., TI-authorized distributors).

4. Testing & Acceptance Criteria

  • ICT/FCT Testing: Test program files (.pcf format)
  • Burn-In Testing: Temperature cycle parameters (e.g., 85℃ full load, 4 hours)
  • Visual Inspection: IPC-A-610 Class 2/3 standard

5. Order Basics

  • Batch Quantity: Initial order + estimated monthly demand.
  • Delivery Address (for logistics cost calculation).
  • Packaging: ESD bags / Blister trays / Vacuum sealing.

Welcome to contact us if you have any request for high frequency inverter board assembly service: sales@bestpcbs.com.