For AC-DC control ICs, we offer primary side control ICs that support PWM + QR combined control, and secondary side synchronous rectification control ICs that can dynamically change the timing off.
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Primary
It is an AC-DC primary control IC.
The MM3665 has a built-in external regulator that is necessary for the circuit configuration, and by performing fixed frequency PWM control during heavy loads and bottoms ticket pseudo-resonance control during medium / light loads, it is optimal for the characteristics of each load region. Realizes control. -
Secondary
It is an AC-DC secondary control IC.
The MM3878 is a secondary side synchronous rectification control IC that supports PWM / QR control, which dynamically changes the off timing according to the power supply status to maximize the effect of synchronous rectification and immediately turns off in the event of an abnormality such as a sudden load change. This prevents backflow.
