SPIDER Automation | RTF LC Power Supply Noise Filter Module | 2S-4S LiPo 16V 2A FPV Power Conditioner
The SPIDER Automation RTF LC Power Supply Noise Filter (Model: RTF-LC-FILTER-2A) is an advanced passive power-conditioning module designed to resolve dirty power delivery in complex autonomous robotics, RC multi-rotors, and FPV (First-Person View) video transmission systems. Modern mobile platforms frequently utilize a single shared primary battery to power high-current drive motors alongside sensitive analog/digital video components to save weight. However, high-frequency switching noise from Electronic Speed Controllers (ESCs), motor brush noise, and DC-DC converter voltage ripple rapidly contaminate the DC supply rail, leading to severe video lines, screen flickering, signal dropouts, and reduced wireless transmission range.
Engineered with a high-performance LC low-pass filter network consisting of high-inductance toroidal chokes and large-capacity smoothing capacitors, the RTF-LC-FILTER-2A suppresses conducted electromagnetic interference (EMI) before it reaches sensitive payloads. Unlike basic single-side filters, this module features a true common-mode design filtering both positive and negative leads simultaneously. Housed in a protective heat-shrink envelope measuring 35 × 14 × 13 mm and weighing only 8 grams, it provides immediate noise suppression without introducing power loss or thermal bottlenecks.
Product Overview & Functional Design
The RTF-LC-FILTER-2A power conditioner provides a clean DC supply baseline for precision electronics operating in harsh electrical environments. Long power harness runs exceeding 7 cm act as receiving antennas for airborne RF interference and conducted ground loops. This filter acts as a low-impedance barrier, smoothing out sharp voltage spikes and high-frequency switching ripple caused by rapid motor acceleration or heavy PWM switching loads.
The module incorporates integrated reverse polarity protection circuitry, preventing permanent damage to downstream video transmitters, receivers, and sensors in the event of miswiring during field setup. With its generous 16V DC maximum input rating and continuous 2A rating (supporting short 3A burst loads), it seamlessly integrates into 2S (7.4V), 3S (11.1V), and 4S (14.8V) LiPo power architectures.
Technical Features & Functional Characteristics
- High-Attenuation LC Circuitry: Combines large-value inductors and smoothing capacitors to eliminate DC-DC switcher noise and motor hash.
- Dual-Lead Common-Mode Architecture: Simultaneous filtering on positive (+) and negative (-) rails blocks ground-loop noise and conducted interference.
- Wide Supply Range (Up to 16V DC): Optimized for 2S, 3S, and 4S LiPo/Li-ion battery packs operating up to 16 Volts.
- Reverse Polarity Safeguard: Onboard protection diode blocks reverse current flow, preserving downstream components.
- High Current Capacity: Delivers 2A continuous operating current with a peak current handling capacity of up to 3A.
- Signal Integrity Restorer: Eliminates video noise lines, rolling bands, and random AV dropouts caused by noisy power buses.
- Ultra-Lightweight Micro Design: Weighs only 8 grams to ensure zero payload impact on flight controllers and aerial rigs.
- Inline Plug-and-Play Integration: Compact rectangular profile fits cleanly along wiring looms and inside tight chassis cutouts.
System Compatibility & Component Integration
The RTF-LC-FILTER-2A module is designed for inline installation between the main power source and noise-sensitive electronic sub-assemblies.
- FPV Video Transmitters (VTX): Filters power supply lines to ImmersionRC, Foxeer, RushFPV, and generic 5V–12V VTX modules.
- FPV CMOS/CCD Cameras: Supplies ripple-free DC power to main flight cameras to prevent image banding and static lines.
- Telemetry & RC Receivers: Ensures stable power delivery to long-range radio receivers and GPS navigation telemetry modules.
- On-Screen Display (OSD) Units: Prevents character corruption and video overlay flickering caused by voltage dips during motor punches.
- Robotics Sensor Networks: Isolates sensitive analog IMUs, sonars, and microcontrollers from high-current motor driver noise.
Applications
This versatile LC filter is an essential power-conditioning accessory across various unmanned vehicles and mobile electronic platforms.
- FPV Racing & Freestyle Quadcopters: Eliminates motor noise from shared 3S/4S flight battery setups powering video gear.
- Fixed-Wing Aerial UAVs: Supplies clean power to long-range video transmitters and autopilot navigation systems.
- Autonomous Mobile Robots (AMR): Isolates sensitive vision sensors and microcontrollers from heavy DC drive motor noise.
- RC Helicopters & Multicopters: Clean power conditioning for onboard flight telemetry and camera gimbals.
- Unmanned Ground Vehicles (UGV): Prevents video interference on ground-rover cameras operating near high-torque drive ESCs.
Package Includes
- 1 × SPIDER Automation RTF LC Power Supply Noise Filter Module (Model: RTF-LC-FILTER-2A)
Product Specifications
| Parameter | Specification |
|---|---|
| Brand / Distributor | SPIDER Automation |
| Model Number | RTF-LC-FILTER-2A |
| Product Type | Inline LC Power Supply Noise Filter Module |
| Maximum Input Voltage | 16V DC |
| Compatible Battery Chemistry | 2S to 4S LiPo / Li-ion / Life Packs (7.4V – 14.8V Nominal) |
| Continuous Load Current | 2 A |
| Maximum Peak Current | 3 A |
| Filter Topology | Common-Mode LC Low-Pass Filter (Positive & Negative Filtered) |
| Circuit Protection | Built-in Reverse Polarity Protection Diode |
| Module Dimensions (L × W × H) | 35 mm × 14 mm × 13 mm |
| Product Net Weight | 8 g |
| Module Finish / Colour | Protective Black Heat-Shrink Casing |
| Shipping Package Weight | 0.012 kg (12 grams) |
| Shipping Dimensions (L × W × H) | 6 cm × 4 cm × 3 cm |
Installation & Wiring Guidelines
Standard electrical soldering and wiring practices should be observed when installing the LC filter into DC power distribution networks.
- Inline Connection Placement: Install the filter module as close as physically possible to the input of the sensitive device (e.g., FPV camera or VTX) for maximum noise attenuation.
- Polarity Verification: Match input power leads strictly to the labeled positive (+) and negative (-) solder pads or wire harnesses.
- Voltage Constraints: Ensure the total input supply voltage does not exceed the 16V DC maximum threshold.
- Current Load Management: Confirm that total continuous power draw from all downstream devices connected to the filter output remains within the 2A rating.
