Features over-voltage, short-circuit, and over-temperature protection mechanisms. Technical Specifications
: Quasi-Resonant Mode (QRM) to minimize MOSFET switching losses. Supply Voltage ( VDDcap V sub cap D cap D end-sub ) : Typically recommended between 9.5V to 27V . Protection Features : Cycle-by-cycle current limiting. VDDcap V sub cap D cap D end-sub
So, what kind of applications can benefit from the LZC8650C's impressive capabilities? The answer is: many.
What are your target and output voltage/current specifications ? lzc8650c ic datasheet pdf
The is a high-performance, single-stage Primary-Side Regulation (PSR) LED driver controller engineered by Lozen Semiconductor (菱奇半导体). Operating in high-efficiency Quasi-Resonant Mode (QRM) , this integrated circuit (IC) eliminates the need for optocouplers and secondary-side control feedback loops, significantly minimizing both system bill-of-materials (BOM) cost and PCB space. It features advanced safety integrations, including an adaptive four-stage temperature current-foldback system and dedicated AC input overvoltage/undervoltage protection (OVP/UVP), making it highly popular in high-power (45W to 110W+) commercial and industrial LED driver topologies. Core Structural and Architectural Design
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The IC is a popular choice for a wide range of lighting products, including: Protection Features : Cycle-by-cycle current limiting
Over-Temperature Protection (OTP) with programmable current reduction.
Based on equivalent series controllers like the DIO8650C , the typical electrical limits include: Typically 9.5V9.5 cap V to 27V27 cap V (Absolute maximum up to 33V33 cap V ). Operating Temperature: to ambient. Power Dissipation: Approximately 0.6W0.6 cap W for SOT23-6 and 1.1W1.1 cap W for SOIC-8 at . Core Functionalities
Loop compensation pin. A capacitor is connected from this pin to GND to stabilize the current control loop. If you share with third parties
Features a unique four-stage temperature foldback function that protects the system by reducing output current as temperatures rise. Voltage Range:
The datasheet provides tested schematics for:
Input pin for chip operation power. Relies on an auxiliary supply wind-off after startup.
AC Input Line ----[ Rectifier Bridge ]----+------------- [ Transformer Primary ] ----( Drain ) | | [Start-up Resistor] [ Power MOSFET ] | | +----> VCC (Pin 8) ( Source ) --- [CS Resistor] ---> GND 1. Start-Up Sequence