Electromagnetic coil WL8346

powerdoublewireless power charging

Overview
WL8346 is a Qi-compatible wireless charging coil designed for smartphone and compact-consumer electronics integrations. The coil functions as transmitter/receiver in wireless power transfer systems, enabling contactless charging with focus on compact form factor and stable thermal behaviour.

Two-coil (dual-coil) design summary
The WL8346 supports a dual-coil layout to increase usable charging area and alignment tolerance. Two coils are positioned according to the mechanical design to offer flexible coverage; electrical selection or switching chooses the active coil based on receiver position.

How it works
Input power → charging controller → Coil 1 / Coil 2 (transmitter) → alternating magnetic field → receiver coil → rectifier → battery. Dual-coil operation energizes the relevant coil to optimise transfer efficiency and coverage.

Main features

• Dual-coil configuration for improved device positioning tolerance and coverage.
• Compact dimensions suitable for smartphone pads, stands and docking solutions.
• Controlled inductance and low DC resistance for efficient power transfer.
• Thermal-stable design with electromagnetic compatibility and shielding considerations.
• OEM customization available: coil size, spacing, winding and mounting method.

Applications

• Smartphone charging pads, stands and integrated docking systems.
• Wearables and smartwatch charging stations.
• True wireless earbud charging cases and multi-zone chargers.
• Smart home devices: speakers, control panels and furniture-integrated chargers.
• Automotive integrated wireless charging in consoles and holders.
• Commercial charging surfaces and multi-position consumer chargers.
• Industrial IoT devices requiring contactless charging for sensors and handhelds.

Advantages vs disadvantages of 2-coil design

• Advantages: larger effective charging area, better misalignment tolerance, flexible mechanical integration and multi-position charging.
• Disadvantages: higher BOM cost, more complex control electronics, larger installation footprint and increased thermal management requirements.

Troubleshooting: common issues and checks

• Device not charging: verify transmitter power supply, charging controller, coil connections and receiver placement; ensure correct coil is energised.
• Intermittent charging: inspect coil alignment, spacing, connector quality and sources of EMI; remove metal objects between coils.
• Slow charging: check input power level, coil DCR/inductance, operating frequency and receiver compatibility; verify thermal limits.
• Coil overheating: review coil current, wire gauge and nearby conductive materials or shielding that may cause losses.
• One coil not working: inspect switching circuitry, wiring and solder joints; measure electrical characteristics of each coil.
• Performance changes after assembly: test coils pre- and post-assembly; housings, adhesives or nearby components can alter electromagnetic response.

Product Datasheet (key table entries represented)
Brand: Weilong Technology
Model Number: WL8346
Product Size: 83 × 46 × 1.0 mm (as per datasheet row)
Rated Power (W): 10 W or 15 W
Wire: 0.08 mm × 10 turns (TS)
Inductance / DCR: 28.5 μH ±10%
Material: copper wire; power contact via lead wire
Mounting: adhered tape; dimensional tolerance ±0.1 mm
Operating temperature: -10°C to 100°C; Insulation class: F
Hi-Pot Test: AC 600V 50/60Hz 2s
Certification: CE, RoHS, ISO9001
MOQ: 1000 pcs; Supply ability: 5000 pcs/week; Delivery time: ~30 days; Port: Shenzhen
Payment terms: TT or LC at sight; Sample order: Yes; Warranty: 1 Year