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EMI® A4WP Solution Points

X2Y® A4WP Solution Points

Johanson's X2Y® components are actively solving severe EMC problems inherent to both A4WP and Qi wireless charging systems. While reducing EMC, X2Y filtering improves the charging efficiency by removing series inductive elements that add to system losses. Replacing the DC input common mode choke (used in many designs) results in 80% size reduction and >50% cost savings. A preliminary applications presentation may be found at:
X2Y® EMC Solutions for Inductive (Qi) and Resonant (A4WP) Wireless Charging DC Input