Maximum Load The Wrong Specification for Pulsed Power Webinar
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The document discusses the importance of power averaging in configuring power supplies for applications with a periodic load, emphasizing the need for careful selection of capacitors and power supplies to meet performance criteria. It highlights the advantages of using this approach, including space, weight, and cost savings. An example configuration illustrates the process of delivering peak power while maintaining the average power to the load.
Maximum Load The Wrong Specification for Pulsed Power Webinar
- 1. 1 Maximum Load: The Wrong Specification for Pulsed Power David Berry Principal Applications Engineer
- 2. 2 › Power Averaging: Definition and Criteria › Power Configuration: Typical Approach vs. Averaging Approach › Solution Sizing: Capacitor & Power Supply Selection › Power Averaging: Configuration Example › Conclusions Agenda
- 3. 3 › Configuring the power supply to deliver the average power to the load › A capacitor is used to deliver the peak power to the load Power Averaging: Definition
- 4. 4 › Periodic load › The load has a wide input range › The max on-time and min off-time are known › Space and weight are critical Power Averaging: Criteria
- 5. 5 900 Watt Periodic Load 25% Duty Cycle Power Configuration: Typical Approach
- 6. 6 Power Configuration: Averaging Approach 900 Watt Periodic Load 25% Duty Cycle
- 7. 7 Solution Sizing: Capacitor Selection › Peak load power › Maximum load on time › Minimum load off time › Load input voltage range
- 8. 8 Solution Sizing: Capacitor Selection C = capacitor value T1 - T2 = load ON duration V1 – V2 = voltage drop at capacitor during load ON V1 V2 T1 T2
- 9. 9 Solution Sizing: Power Supply Selection › Capable of recharging the capacitor to initial voltage › Must be stable during operation › Must be capable of operating in current limit › Must be capable of operating in power limit
- 10. 10 Solution Sizing: Power Supply Selection
- 11. 11 Solution Sizing: Power Supply Selection
- 13. 13 Power Averaging: Example DCM output voltage DCM output current Load current
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- 16. 16 1. Saves system weight 2. Saves system space 3. Saves system cost Conclusion Power Averaging
- 17. 17 Thank You