The IC utilizes valley turn-on for the primary MOSFET, which reduces switching losses and EMI. Four-Segment Temperature Foldback:
The IC is a popular choice for a wide range of lighting products, including:
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. lzc8650c ic datasheet pdf
Power supply pin for the control IC. Typically protected by an internal Zener clamp. 4. Internal Architecture and Functional Block Analysis
: The谷底 (valley) detection and frequency modulation techniques help maintain low electromagnetic interference. Typical Application Circuit Pins The IC utilizes valley turn-on for the primary
A (Typical) — Low start-up power consumption enables fast turn-on using ultra-high-value bleeder resistors. Operating Current ( IOCcap I sub cap O cap C end-sub
: Includes VDD over-voltage protection (OVP), cycle-by-cycle current limiting, output short-to-ground protection, and programmable input line OVP. Technical Specifications Power supply pin for the control IC
The LZC8650C is a staple in the manufacturing of high-wattage LED drivers, ranging from 45W to 110W units. Its compact design and high efficiency make it suitable for: Street lighting and industrial floodlights. Commercial indoor lighting.
: Current sense; monitors the voltage across the MOSFET's sense resistor. GND : System power ground. DRV : Gate driver output for the external MOSFET. VDD : Power supply input for the IC. OTP : Current foldback temperature point setting. OVP : Input line voltage over-voltage protection setting. Application Circuit Overview