This post explains for the semiconductor STR-X6750.
The Part Number is STR-X6750F.
The function of this this is Power IC for Quasi-Resonant Type Switching Power Supply.
Package: TO-3PF-7L Type
Preview images :
The STR-X6750F is power IC for quasi-resonant type switching power supply, incorporating a power MOSFET and a controller IC. The product achieves high efficiency and low noise power supply systems by the quasi-resonant operation.
An IC (Integrated Circuit) for a quasi-resonant type switching power supply is a specialized semiconductor device designed to control and regulate the operation of a quasi-resonant (QR) switching power supply. Quasi-resonant power supplies are a type of switch-mode power supply (SMPS) that offer advantages in terms of reduced electromagnetic interference (EMI), improved efficiency, and lower switching losses compared to traditional fixed-frequency SMPS designs.
1. Quasi-resonant operation mode
(1) Achieves the optimal high efficiency and low noise power supply systems.
2. Current mode control
3. Built-in PWM oscillator
(1) The PWM operates with the minimum frequency of around 22kHz, until the quasi-resonant signal becomes valid, reduces the stress on components at startup and load-shorted.
4. Built-in soft start function
5. Step-drive function, reducing switching noise
1. Specification :
(1) MOSFET 650V(MIN), 0.62Ω(MAX)
1. Home appliances
2. OA equipments
3. Industry machines
4. Communication devices