Sinrace Power Supply Technology (Shenzhen) Co., Ltd.
Why choose Sinrace?
What true advantages you will have if you choose us?
We are a professional manufacturer of power supply with 16years' history already, and we are always with you for offering you answers on power supply questions and supplying you with enthusiastic services. The emphasis and the main responsibility for us is to meet our customers's needs unceasingly.We believe those customers are our partners who shall build long-time and reliable business relationship with us.
Certifications
| Ferrite Magamp on Flyback Power Supply |
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For a dual output flyback power supply where both outputs deliver substantial power (5 V at 2 A and 12 V at 3 A, both regulated to ± 5%), the 12 V goes to 0 load and cannot regulate within the 5% limit. One possible solution, a linear regulator, is undesirable because it is expensive and reduces efficiency. A proposed solution is to use a magamp on the 12 V output, even given the flyback topology. A ferrite magamp is proposed in order to reduce cost. The control scheme for a ferrite magamp however, is different than for a traditional square-loop material (high permeability material). With ferrite, the control circuit (D1 and Q1) sinks current in order to bring up the output. The circuit has been tested to work on the bench. The transformer is wound for 5 V and 13 V outputs. It can even meet input power of less than 1 W with 5 V at 300 mW and 0 load on 12 V while regulating the 12 V output to ± 5%.
---From PI |
