Reference Designs

This reference design provides a tiny auxiliary +12-V supply for general purpose. In this case: SEPIC topology supports wide input range from 6 V to 60 V. Even at inputs as low as 3.5 V: this reference design is able to provide half of the output power. Another benefit of SEPIC is low reflected ripple: resulting in less conducted emissions. The small magnetizing inductance sets right half plane zero fairly high: so loop bandwidth can be increased and allows a small output capacitance by keeping good transient response.