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An overview of the Cost accounting

DK124 is an off-line switching power supply chip with a maximum power output of 24W. Is different from the PWM controller and the external discrete power MOS combination solution, DK124 the internal integrated PWM controller, 700 v power tube and primary peak current detection circuit, and adopted can omit patent since the power supply of the auxiliary power supply winding technology, thus greatly simplifies the peripheral application circuit, reduced the number of the original circuit size and weight, especially suitable for the cost sensitive flyback switch power supply.


Characteristic parameters:


    Input voltage: 85V~265V full voltage

    Output power: 18W

    Output voltage: 5V

    Output current: 3.6a

    Effective rate: 86.74%


1. Schematic diagram of power supply circuit:


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2. PCB diagram: 

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3. Physical drawing of DEMO board:

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4. Debugging data:

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