Summary:
working principle
The universal input power supply has two main output power supplies (+26VDC and –26 VDC) and consists of two parallel converters, each with 30 W of continuous output power and 100 W of peak output power. Both converters use the PeakSwitch device (PKS607YN) and share an input stage. The ±26 V output provides 3.8 A of output current and 1.15 A of continuous output current. Therefore, the two converters add up to 60 W of continuous output power and 200 W of peak output power. Product applications include audio amplifiers that require peak power in a short period of time. The magnitude and duration of the peak current is determined by the duty cycle, ambient temperature, and thermal conditions.
design feature
- Can effectively replace the linear transformer power supply used in home audio systems
- Small number of components, small and light
- High energy efficiency
- More than 75% efficiency at full load (60 W)
- No-load power consumption less than 300 mW at 265 V AC input
- Reduces the use of heat sinks and eliminates the need for a separate standby power supply
- Excellent transient response improves audio quality
- Dual converter for excellent cross regulation between outputs
- The integrated frequency modulation feature combined with a low cost EMI filter enables the design to meet CISPR-22/EN55022B conducted EMI requirements (see Figure 2).
- Integrated safety and reliability:
- Accurate, self-recovering thermal shutdown function keeps PCB temperature within safe conditions under all conditions
- Entering the latched shutdown state when the output short circuit and the feedback loop are open loop
Circuit design of 60W continuous output, 200W peak audio amplifier power supply
See the PDF document for details (click on the PDF file to download)
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Anshan Yuexing Technology Electronics Co., LTD , https://www.yxhtfmtv.com