LED Driver PCB Copy: Reproduce Any Driver Board with Full Documentation
An LED driver PCB copy takes your existing constant-current or constant-voltage driver board and produces a complete manufacturing package—Gerber files, bill of materials, and schematic—so you can reorder, modify, or second-source the design without depending on the original supplier. Our engineers handle single-layer aluminum-substrate drivers up through multi-layer FR-4 dimmable and programmable driver boards, with every project covered by a mutual NDA before the sample even ships.
Why LED Driver Boards Need Specialized Copy Techniques
LED driver PCBs present challenges that generic board-copy workflows miss. The combination of high-voltage AC input, tight thermal management, and sensitive feedback loops means tolerances, material choices, and component placement all matter more than on a typical digital board.
Aluminum-Core and Metal-Core Substrates
Most high-power LED drivers—anything above roughly 20 W—use an aluminum or copper MCPCB to move heat away from the switching FETs and inductor. During LED driver PCB copy, we measure the dielectric layer thickness (typically 75–150 µm, thermal conductivity 1.0–3.0 W/m·K) and specify it in the fabrication notes. Getting this wrong by even 0.5 W/m·K shifts junction temperatures enough to affect LED lifespan.
High-Voltage Creepage and Clearance
AC-DC LED drivers carry mains voltage. IPC-2221B and UL 8750 set minimum creepage distances—often ≥ 6.4 mm between primary and secondary sides at 240 VAC. Our reverse-engineering process captures these spacings from the donor board and verifies them against the applicable standard before releasing Gerber files.
Current-Sense and Feedback Traces
A 0.1 Ω current-sense resistor feeding back to a controller like the BP2866 or MP3424 requires short, low-inductance Kelvin-routed traces. We photograph, measure, and replicate these routing constraints in the layout rather than just auto-routing from a netlist.
What You Receive from an LED Driver PCB Copy Project
| Deliverable | Format | Details |
|---|---|---|
| Gerber file set | RS-274X / Gerber X2 | All copper, mask, silk, drill, and board-outline layers |
| Bill of materials | Excel / CSV | Manufacturer P/N, value, package, quantity, alternates where available |
| Schematic | PDF + editable (Altium / KiCad / OrCAD on request) | Hierarchical sheets for power stage, control loop, EMI filter |
| Pick-and-place file | CSV with XY + rotation | Machine-ready for SMT assembly |
| Stackup / material spec | PDF note | Substrate type, copper weight, dielectric thickness, thermal conductivity |
Common LED Driver Topologies We Copy
Different topologies impose different reverse-engineering priorities. Here is how we handle the most common types:
- Buck (step-down) constant-current: 5–60 W range, typically single-layer MCPCB. Focus on inductor value, sense-resistor precision (±1%), and gate-drive trace length.
- Flyback isolated: 10–150 W, 2-layer FR-4 with safety isolation slot. We verify transformer pinout, primary-secondary clearance, and snubber component values.
- LLC resonant: 75–600 W, often 4-layer FR-4. Requires precise capture of resonant tank component values (Lr, Lm, Cr) and controlled-impedance gate-drive traces.
- Linear constant-current (no-transformer): Sub-10 W, single-layer, low component count. Fast turnaround—often 3 working days.
- DALI / 0-10 V / PWM dimmable: Adds a low-voltage control section. We extract the dimming interface circuit and protocol-level component values separately.
Step-by-Step LED Driver PCB Copy Process
1. Sample Intake and NDA
You ship one working sample (two preferred for cross-verification). We execute a mutual NDA before opening the package. Typical shipping: 3–5 days via DHL/FedEx to our Shenzhen lab.
2. High-Resolution Scanning and Photography
Each layer is scanned at 2400 DPI minimum. For MCPCB drivers, we use controlled chemical stripping to expose the aluminum-core layer without damaging trace geometry. All critical spacings—creepage slots, thermal vias, heatsink pad dimensions—are measured with a calibrated optical CMM (±0.02 mm).
3. Component Identification and BOM Build
Every part is cataloged: IC markings decoded, passives measured with an LCR meter, magnetics characterized on an impedance analyzer for inductance and DCR. Obsolete or custom-marked parts get cross-referenced to available equivalents—common with older Supertex or Marvell LED driver ICs that have been discontinued.
4. Schematic Extraction
Our engineers trace the circuit from the physical board, grouping it into functional blocks: EMI filter → rectifier/PFC → power stage → feedback/control → output filter → dimming interface. The schematic is checked against the controller IC datasheet’s reference design to catch any non-obvious component functions.
5. Gerber Reconstruction and DRC
The layout is rebuilt in CAD. We run design-rule checks against IPC-2221B for creepage/clearance, verify copper weight matches the thermal requirements (typically 2 oz on power layers), and confirm pad dimensions against the BOM footprints. If the original board uses a non-standard outline—common with retrofit LED tube drivers—we capture it precisely.
6. Prototype Verification
On request, we fabricate 3–5 prototype boards and assemble them. We test output current regulation (±2% of the donor board’s measured value), efficiency, and thermal performance under rated load for a minimum 2-hour burn-in. The verified package is then released to you.
Turnaround and Pricing Signals
| Driver Complexity | Layers | Typical Turnaround | Starting Price Range |
|---|---|---|---|
| Linear / simple buck | 1 (MCPCB) | 3–5 working days | $300–$500 |
| Flyback isolated, non-dimmable | 2 | 5–7 working days | $500–$900 |
| Flyback / LLC dimmable | 2–4 | 7–10 working days | $800–$1,400 |
| Programmable / IoT-connected driver | 4+ | 10–14 working days | $1,200–$2,000+ |
Pricing depends on component count, IC complexity, and whether firmware extraction is needed. We provide a fixed quote within 24 hours of receiving clear photos of both sides of the board.
When Does LED Driver PCB Copy Make Sense?
Most clients come to us in one of these situations:
- Supplier gone or unresponsive: The original driver factory closed, merged, or won’t share files. Common with Chinese-sourced drivers sold under white-label brands.
- End-of-life components: A key IC (e.g., Supertex HV9910, ON Semi NCL30160) is discontinued. Copying the board lets you redesign around an available alternative while keeping the rest of the circuit intact.
- Second-source or in-house production: You want to move manufacturing to your own CM without paying the original designer’s markup.
- Modification baseline: You need to change the output current, add dimming, or upgrade to a higher-efficiency topology, and the original files don’t exist.
These same pain points appear across adjacent product categories. Clients working with lighting control and ballast boards face nearly identical challenges, as do teams managing HVAC control boards that integrate LED status indicators with power-switching circuits.
Handling Driver ICs and Firmware
Many modern LED drivers use microcontroller-based ICs (e.g., Microchip PIC, STM8, or proprietary Tuya/BK modules for smart drivers) with internal firmware controlling dimming curves, thermal foldback, and communication protocols. If the driver on your board contains programmable firmware, we can attempt readout only with your written authorization confirming ownership or licensed rights to the design. All firmware work is performed under NDA.
For analog-only drivers using dedicated controller ICs (BP2866, MP3424, LM3409, etc.), no firmware extraction is needed—the behavior is fully defined by external component values, which we capture in the schematic and BOM.
Quality and Safety Considerations
LED drivers connect directly to mains voltage. A copied board that ignores safety spacing or uses the wrong Y-capacitor rating is a liability. Our process includes:
- Creepage/clearance verification per IPC-2221B and UL 8750 (or EN 61347-2-13 for EU markets).
- Correct specification of safety-rated components (Y1/Y2 capacitors, optocouplers with ≥ 5 kV isolation).
- Thermal simulation cross-check on MCPCB designs to confirm junction temperatures stay within the LED module’s Tj(max).
- Hi-pot test on prototypes (primary-to-secondary, 3 kVAC / 1 min) when requested.
This level of rigor is similar to what we apply on energy storage BMS board copies and smart metering board copies, where high-voltage isolation is equally critical.
Related Application Areas
LED driver boards frequently appear inside larger systems. If you also need the host controller or interface board copied, we handle those in parallel. Common companion projects include consumer electronics main boards (smart-home lighting hubs) and elevator control panels that incorporate LED indicator driver circuits.
Can you copy an LED driver board if the main IC markings are sanded off?
Yes, in most cases. We use a combination of package dimensions, pin count, circuit topology matching, and decapping (if needed) to identify the IC. For common LED driver controllers, the surrounding circuit—bootstrap cap, sense resistor, compensation network—narrows the candidate list quickly. Identification adds 1–2 working days.
Do you copy aluminum-core (MCPCB) LED driver boards?
We do. We measure dielectric thickness and thermal conductivity from the donor board and specify them in the fabrication notes. We work with MCPCB fabricators who offer 1.0, 1.5, 2.0, and 3.0 W/m·K dielectric options. Copper weight is typically 1–2 oz; we match whatever the original uses.
What if the LED driver uses a proprietary or obsolete IC?
We identify the IC function and recommend a pin-compatible or functionally equivalent replacement. For example, the discontinued Supertex HV9910 can often be replaced with the Microchip HV9910C with minor BOM adjustments. We document the substitution and verify it on the prototype.
Is an NDA included, and who owns the output files?
Every LED driver PCB copy project begins with a mutual NDA. You own all output files—Gerber, BOM, schematic—outright upon final payment. We retain no manufacturing or distribution rights.
How accurate is the copied board compared to the original?
Our target is ±0.05 mm on trace geometry and pad placement, verified by overlay comparison. Electrically, output current regulation on the prototype matches the donor board within ±2%, and efficiency within ±1 percentage point under the same load and input voltage.
Check feasibility for your project
Send the chip marking or board details and tell us what you need to recover. Add clear photos if available.
Request a feasibility reviewWorking on a board like this?
Send the chip marking or two photos. You get feasibility, lead time and price within 24 hours, and the check costs nothing.
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