High-efficiency PFC (Power Factor Correction) controllers for low-cost drivers. „Mouser Electronics“ Lietuva Protection Mechanisms
This IC is designed for "Primary Side Regulation" (PSR), which eliminates the need for an optocoupler and TL431 on the secondary side, reducing both cost and board space. You can find these chips at electronic component retailers like IndiaMart or Prism Electronics .
Internally clamped at 16V to protect external MOSFETs. Operating Temperature: -40∘Cnegative 40 raised to the composed with power cap C +85∘Cpositive 85 raised to the composed with power cap C (Ambient). Package Type: Commonly available in SOP8 (SOIC-8). Pin Configuration (SOP8) Description CMP Loop compensation for constant current/voltage regulation. FB Zero-crossing detection and over-voltage protection (OVP). CS lzc8650c ic datasheet pdf
VDRV_CLAMPcap V sub cap D cap R cap V _ cap C cap L cap A cap M cap P end-sub Cycle-by-Cycle Current Limiting Voltage ( VCS_LIMcap V sub cap C cap S _ cap L cap I cap M end-sub Current Sense Leading Edge Blanking Time ( TBK_CScap T sub cap B cap K _ cap C cap S end-sub Thermal Protection Thermal Foldback Point / Recovery Hysteresis 145°C / 30°C Pinout Configuration and Descriptions
Supports current compensation based on temperature using an external NTC resistor to protect the LEDs from overheating. Technical Specifications Based on typical datasheet parameters for the 8650 series: Internally clamped at 16V to protect external MOSFETs
Disclaimer: This write-up is a generalized technical summary based on the typical behavior of ICs in the LZC86xx series and standard LED driver topologies. For precise circuit design, warranty validation, and safety compliance, the official specific manufacturer datasheet must be consulted.
The LZC8650C operates in , a control method that significantly reduces switching losses in the external power MOSFET, thereby enhancing system efficiency. Its primary side regulation (PSR) technology allows for precise control of the LED current based solely on information from the primary side of the transformer. and safety compliance
The device is engineered to provide high Power Factor Correction (PFC) and low Total Harmonic Distortion (THD), making it compliant with international lighting standards (such as ENERGY STAR and IEC 61000-3-2). Its ultra-low start-up current and proprietary control algorithms allow for high efficiency and reliable operation.
Do you require a or buck-boost (non-isolated) topology?
: After startup, an auxiliary winding on the transformer provides continuous power to the VCC pin via a fast recovery diode and filtering capacitor. Ensure this voltage sits comfortably between the UVLO limits. 7. Conclusion