Tiny automotive 2-W bias power supply reference design
Description
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.
Features
- Tiny 12-V power supply accepts a wide input voltage range of 6 V to 60 VThe SEPIC topology is well suited for low reflected ripple due to continous input currentSmall form factor is realized due to integrated FETBoard with only two-layer and single-side assembly simplifies manufacturing
Applications
- Auxiliary-power supplies
- 48-V to 12-V DC/DC converter
- Bidirectional 400-V & 800-V to LV
Product Categories
- Power management