LQH1812 Series Ferrite Core Inductors for High Efficiency LED Drivers

Power Your Lighting Solutions with Precision-Engineered Magnetics

In high-current LED applications like automotive headlights and solar street lamps, inefficient inductors cause thermal runaway and premature failure. Our LOH1812 series Power Inductor solves this with Ferrite Core technology—delivering up to 550mA current rating at 0.20Ω max DCR, engineered for 92%+ efficiency in 5A LED driver circuits. Unlike generic inductors, we optimize SRF up to 120MHz to eliminate PWM buzzing noise, saving 15% BOM cost versus shielded alternatives.

Core Electrical Specifications

Test Conditions:

• Inductance @ 1kHz (HP4266A) 
• DCR measured via QuadTech 1880 Milliohm Meter 
• RoHS compliant, compatible with wave/reflow soldering 

Why Engineers Choose LOH1812 Inductors

① Optimized for 5A LED Driver ICs

Pair seamlessly with FS6005/XL6005 drivers (3.6V-36V input) to drive 12x 3W LEDs in series—40% more than standard solutions. Our low DCR (0.20Ω) reduces power loss by 22% versus ceramic core inductors, critical for battery-powered solar lights .

② Cost-Effective Ferrite Core Design

Ferrite cores cut core losses by 35% at 300kHz vs. iron powder, enabling smaller heatsinks. With 1812 package (4.95×3.81mm), we achieve 98% SMT placement yield—ideal for high-volume consumer LED production .

③ Noise Suppression Without Added Cost

Self-resonant frequencies up to 120MHz absorb EMI from PWM dimming, eliminating the need for external EMI Filter components. Verified in automotive LED tail lights passing CISPR 25 Class 4.

Thermal Management Tips:

• Place inductor ≥2mm from driver IC to reduce mutual heating
• Use 2oz copper PCB with 3mm trace width for VOUT paths 
• Monitor core temperature with IR Sensor (max ΔT=40°C @ rated current)