Determinants of the maximum power output of a switching power supply
1. The actual power required in a device does not meet all requirements.
2. Power device withstand voltage and power consumption for switching power supply.
3. The withstand voltage and rated current of the power rectifier device.
4. The size and structure of the magnetic core of the high-frequency pulse transformer are limited.
5. The reliability and economy of the switching power supply.
It is not that the higher the power of the switching power supply, the better, but that it is economical, practical and reliable, and can meet the requirements of high efficiency and high reliability.
The above are the factors considered in the power design of general switching power supplies.
For the 3842 device, its power limit is determined by the performance of the chip itself. Its withstand voltage is up to 30 volts, and its current is up to 1A. Its maximum output power is also limited by the reliability frequency, etc., and it is not a power output itself. device.
Therefore, it is not suitable for power output applications. It is generally used for driving. The maximum output current is 1A, and the S output voltage is 5V.
