LD9164K2Primary Side Quasi-Resonant Controller with MOSFET Integrated
The LD9164K2 is an excellent primary-side feedback controller with QR operation, integrated with a 650V MOSFET switch in a SOP-8 package. It minimizes the components counts and is ideal for low cost applications.
It provides functions of ultra-low startup current, green-mode power-saving operation and leading-edge blanking of the current sensing. Also, the LD9164K2 includes the comprehensive protection function, such as Over Load Protection (OLP), Over Voltage Protection (OVP), and internal Over Temperature Protection (OTP). Furthermore, the programmable Brown-in/out Protection is built-in.
In most cases, PSR controlled flyback converters would suffer from bad load regulation performance. To deal with this problem, dedicated load regulation compensation is also implemented in LD9164K2.
Features
- Primary-Side Feedback Control with Quasi-Resonant Operation
- Built-in 650V MOSFET Switch
- Built-in Load Regulation Compensation
- Current mode control with cycle-by-cycle current limit
- Ultra-Low Startup Current (<1.9mA)
- 80 kHz Maximum Switching Frequency.
- Green Mode Control to enhance Efficiency
- LEB (Leading-Edge Blanking) On CS Pin
- VCC OVP (Over Voltage Protection)
- Adjustable Brown in/out on FB pin.
- Internal OTP (Over Temperature Protection)
- SDSP (Secondary Diode Short Protection)
Applications
- Mobile Phone Charger
- Low Power AC/DC Adaptor
