MM3661

For AC-DC control ICs, MinebeaMitsumi offers primary side control ICs that support PWM + QR combined control, and secondary side synchronous rectification control ICs that can dynamically change the timing off. The MM3661 is the current mode QR controller IC, designed for flyback converter. This IC can substantially reduce standby power by the start up circuit using the 500V high breakdown process, and burst mode operating at light load. It operates bottom turn on by quasi resonant and the  frequency is reduced by bottom skip that minimizes power loss improves average efficiency. The IC which has various protection functions can assist safety design of power supply.

MM3661 features :

• The startup circuit, using a 500V high breakdown process, reduces startup circuit loss
• Current mode PWM controller（maximum oscillating frequency 75kHz)
• Frequency reduction function in load of middle range
• Burst operation function at light load
• Overcurrent protection function (adjusted to the two-step process according to changes in the input)
• Various built-in protection functions (soft start, overcurrent protection, overload protection, overvoltage protection, external latch protection)
• Operational interaction function with the PFC circuit (X rank)
• Package SOP-8J / SOP-10A

MM3661 applications :

• Flat panel TV
• Game equipment
• AC/DC adapters
• Various power supplies