Applications: Fixed frequency control circuit, apply to communication products, digital products, energy conservation and environment friendly products, massage equipment, fitness equipment, medical equipment and other household electrical appliances Product characteristics: Safety approvals of ccc, cb, ul, ce, gs, bs, kc, saa, pse & tuv Low standby power consumption, meets the energy efficiency standards of eu coc v5 and us doe vi/cec vi (6) Accept customization of specification, usb output type or power cord output type Customization: eu standard, american standard, british standard, australia standard, korean standards, chinese standard Electrical characteristics: Input voltage: 100-240v ac (90-264v ac) Input current: 0.5a max Frequency: 50/60hz (47-63hz) Output voltage: 4.2-30v Output current: 0.1-3.0a No-load power consumption: 0.3w max Efficiency: 80% min Ripple and noises: 50-300mv Line regulation: ±1% Load regulation: ±5% Output protections: Short circuit protection Over-voltage protection Over-current protection Environment characteristics: Hi-pot test: 3750v ac, 60s, 5ma max Insulation-resistance: 100m min Leakage current: 0.25ma max Operating temperature: 0 to 40c Storage humidity: 5-95% rh Burn-in test: rate load, 40 ±5c, 4 hours Emc standards: en55022 class b/fcc part 15 class b En55024/a1: 2001/en61000