The following reference structural layout details how the LZC8650C functions inside a non-isolated buck-boost or isolated flyback LED driver framework. Circuit Component Stages:
: Detects and protects against output short-to-ground conditions.
: Zero-crossing detection, line voltage compensation, and over-voltage protection.
typically at 145°C), the IC automatically reduces output LED current at a rate of . This keeps the fixture illuminated at a lower brightness rather than completely blacking out the room. A hardware shutdown occurs only if thermal limits exceed 165°C. lzc8650c ic datasheet pdf
The LZC8650C includes a comprehensive set of protection features to ensure system safety and reliability, with auto-recovery capability:
Always check the “Note” sections in the datasheet’s tables—they often contain critical usage conditions (e.g., “output current derating required above 50°C ambient”).
Quasi-Resonant (QR) mode to reduce MOSFET switching losses. Start-up Current: Extremely low (15µA typical). The following reference structural layout details how the
High-value startup resistors draw a tiny current (
The “C” often indicates a specific die version or temperature range (e.g., commercial 0°C to 85°C vs. industrial -40°C to 85°C).
: The谷底 (valley) detection and frequency modulation techniques help maintain low electromagnetic interference. Typical Application Circuit Pins typically at 145°C), the IC automatically reduces output
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:
A: Try the “Datasheet (PDF)” link on LCSC’s product page or UTSOURCE. Many Asian distributors provide free, immediate downloads.
Regulates LED current accurately without secondary-side feedback, reducing system cost and complexity.
Once VDD crosses 19.8V, the DRV pin begins switching the external MOSFET. The auxiliary winding of the flyback transformer then takes over power delivery to VDD through a fast recovery diode.
The datasheet will also show optional circuits for: