Lzc8650c Ic Datasheet Pdf File
The LZC8650C is a Primary-Side Regulation (PSR) controller designed for offline AC/DC flyback power converters, specifically targeting LED lighting applications. Manufactured by Lozen Technology (菱奇半导体), this IC is known for achieving a high power factor and accurate real-current control. Technical Overview Package Type: SOP-8 (8-pin Surface Mount).
5. Application Topologies
The LZC8650C is versatile, supporting several topologies: lzc8650c ic datasheet pdf
6. Functional Description
Start-up and Supply
The LZC8650C utilizes a high-voltage startup circuit connected to the rectified AC line (via the HV pin). This charges the VCC capacitor rapidly. Once the VCC voltage reaches the UVLO threshold, the internal logic activates. After startup, the IC is typically self-powered via an auxiliary winding from the transformer. The LZC8650C is a Primary-Side Regulation (PSR) controller
2. Key Features
- High Precision: Constant current output accuracy typically within ±3%.
- High Power Factor: Achieves Power Factor (PF) > 0.9 and low THD (< 10%) easily.
- Protection Mechanisms: Integrated Over-Voltage Protection (OVP), Short Circuit Protection (SCP), and Over-Temperature Protection (OTP).
- Low Standby Power: Ultra-low operating current minimizes standby power consumption.
- SOP-8 Package: Standard industry package allows for compact PCB layouts.
- BCM/CrM Operation: Reduces switching losses and EMI stress compared to hard-switching topologies.
Standard SOP-8 variants of this IC generally follow this functional pinout: Standard SOP-8 variants of this IC generally follow