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What are the benefits of knowing the chips on the ATX power circuit board
Each chip corresponds to a data sheet compiled by the manufacturer. The data sheet is the specification of the chip. The data table describes in detail the technical information of the chip, such as function definition, working principle, working time sequence, electrical parameters, appearance size, welding process, storage conditions and so on. Some data sheets even contain public domain circuits, which are the most accurate and authoritative technical data we need to understand and master the chip.
(1) the PWM (Pulse Width Modulation, pulse width of the switching pulse source (oscillator source) necessary to generate the switching power supply.
Modulation) chips, such as TL494, KA7500, etc., in the main power supply.
(2) an operational amplifier used to compare two input voltage signals, such as LM339, etc.
(3) Optocouplers for feedback and voltage stabilization control, such as PC817, etc.
(4) Protection chips for monitoring output voltage and output control signals (PSON, PG), such as WT7510, etc.
