Lzc8650c Ic Datasheet Pdf -
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is a high-performance, single-stage primary-side offline LED driver controller manufactured by Lozen Technology (often labeled with the "LZ" brand). It integrates active Power Factor Correction (PFC) and operates in Quasi-Resonant (QR)
mode to achieve high efficiency and low electromagnetic interference (EMI). taoic.oss-cn-hangzhou.aliyuncs.com Key Specifications & Features : Offline AC/DC Flyback power converter for LED lighting. Power Factor : >0.95 at 230VAC. Total Harmonic Distortion (THD) : <10% at 230VAC. Startup Time : Quick start-up in less than 500ms. Efficiency
: Achieves high efficiency by eliminating secondary feedback components like opto-couplers. Protection Features
: Includes over-voltage protection (OVP), short LED protection, open LED protection, and over-temperature protection (OTP). „Mouser Electronics“ Lietuva Electrical Characteristics (Typical)
Based on the related LZC86xx series and industry standards for this IC: Supply Voltage ( cap V sub cap D cap D end-sub : Typically 9.5V to 27V. Operating Temperature : -40°C to +85°C ambient; junction up to 125°C. Gate Drive Output : Internally clamped at 16V to protect external MOSFETs. „Mouser Electronics“ Lietuva Pin Configuration (SOP-8 Package)
While specific LZC8650C pin maps are often proprietary, it generally follows the standard Lozen PSR layout used in the LZC8620 series : Loop compensation for constant current regulation. : Output diode zero current detection and voltage sensing. : Current sense pin for MOSFET current monitoring. : Power ground. : Totem-pole output to drive the external power MOSFET. : Power supply pin. : Temperature compensation point setting.
: Connects to an NTC resistor for temperature-based current compensation. Reference Documentation Direct Datasheet Information : You can view similar technical specifications on Prism Electronics or download the closely related LZC8620 Datasheet PDF Equivalent Replacement DIOO Microcircuits
is often cited as a functional equivalent with identical pinouts and electrical ratings. „Mouser Electronics“ Lietuva
The is a high-performance, single-stage Power Factor Correction (PFC) controller and Primary Side Regulation (PSR) LED driver IC. It is widely used in offline AC/DC flyback power converters for LED lighting applications, such as floodlights and industrial automation. Key Features and Benefits
is designed to simplify LED driver circuits by eliminating the need for secondary-side feedback components like opto-couplers and TL431 regulators.
High Power Factor: Integrates active PFC to meet stringent power quality standards.
Primary Side Regulation (PSR): Accurately controls LED current using primary-side information, reducing overall system cost.
Quasi-Resonance Mode (QRM): Operates in QR mode to reduce MOSFET switching losses and improve efficiency.
Temperature Foldback: Features a unique output current foldback based on temperature, which protects the system by reducing current as heat increases.
Universal Input Support: Provides precise output current across a wide universal AC input range. Technical Specifications lzc8650c ic datasheet pdf
According to the LZC8650 datasheet, here are the critical electrical parameters: Supply Voltage ( VDDcap V sub cap D cap D end-sub ): Typically operates between 9.5V and 27V. Startup Current: Ultra-low, typically around
Gate Driver Output: 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
Current sensing pin; monitors voltage across a high-precision resistor. GND System and power ground. DRV Totem-pole output to drive the external power MOSFET. VDD Main power supply for the IC. OTP Sets the temperature foldback point for thermal protection. OVP Input line voltage over-voltage protection. Protection Mechanisms
The IC includes a comprehensive suite of safety features to ensure reliability: Over-Voltage Protection (OVP): Integrated for both VDDcap V sub cap D cap D end-sub and output voltage.
Short Circuit Protection (SCP): Protects the output against GND shorts.
Cycle-by-Cycle Current Limiting: Monitors the CS pin to prevent over-current conditions in every switching cycle.
Hysteresis OTP: Built-in over-temperature protection with thermal hysteresis. Where to Download the Datasheet
You can find the full technical documentation for the LZC8650C at the following locations: LZC8650 Detailed Datasheet (PDF) Mouser - DIO8650C (Equivalent/Related Series) Prism Electronics Product Page
The LZC8650C is a primary-side modulation isolated driver IC designed for efficient offline AC/DC flyback and Buck-Boost power converters, primarily used in LED lighting . It is manufactured by Lozen Technology (菱奇半导体) . Key Technical Specifications
According to the datasheet, the LZC8650C integrates advanced control strategies to maintain high current accuracy without secondary-side feedback components . Package: SOP8 (8-pin Surface Mount) .
Operating Mode: Quasi-Resonance (QR) mode, which reduces MOSFET switching losses . Operating Temperature: Recommended junction range of -40∘Cnegative 40 raised to the composed with power C 125∘C125 raised to the composed with power C Voltage Range: Typical supply voltage (VDD) from
Safety Isolation: Provides high power isolation to protect systems from electrical hazards . Core Features
Primary-Side Regulation (PSR): Eliminates the need for opto-couplers and secondary control circuits, simplifying the system design .
Active Power Factor Correction (PFC): Achieves a high power factor (PF > 0.95) for better energy efficiency .
Temperature Foldback: A unique four-stage temperature foldback function that can be programmed via a single external resistor to reduce current as temperature rises .
Line Voltage Compensation: Integrated valley detection and line compensation ensure precise output current across universal AC input ranges . Pinout Description (SOP8) Description CS
Current sense pin; detects source current and secondary short circuits . GND Ground pin . COMP Search the part number plus manufacturer name or
Loop compensation pin; requires an external RC network for stability . ZCS
Zero-crossing detection; also used for over-voltage protection (OVP) . VIN Power supply pin . DRV
Gate driver pin; connects to the gate of the primary MOSFET . Integrated Protection Mechanisms
The LZC8650C includes several safety features to enhance system reliability :
The LZC8650C is a high-performance, single-stage flyback and Power Factor Correction (PFC) controller integrated circuit (IC) primarily designed for LED lighting applications. This IC is often utilized in high-power LED drivers (ranging from 45W to 110W) due to its efficiency and primary-side regulation (PSR) capabilities, which eliminate the need for secondary feedback circuits. Key Features and Benefits
The LZC8650C is engineered to simplify LED driver design while maintaining high reliability and safety.
Single-Stage PFC: Achieves a high power factor (typically >0.95) and low total harmonic distortion (THD <10%) in a single power stage.
Primary-Side Regulation (PSR): Controls output current accurately using information from the primary side, removing the need for an opto-coupler or secondary feedback components.
Quasi-Resonance (QR) Mode: Reduces switching losses in the MOSFET, leading to higher system efficiency.
Temperature Foldback: Features an integrated Over-Temperature Protection (OTP) that can fold back the output current based on temperature settings to prevent overheating.
Comprehensive Protection: Includes VDD over-voltage protection (OVP), cycle-by-cycle current limiting, output short-to-ground protection, and programmable input line OVP. Technical Specifications
According to preliminary datasheet data from TaoIC, the LZC8650C operates within the following parameters: Typical Value Range/Limit Supply Voltage (VDD) 18.1V – 21.5V (Turn-on) VDD Over-Voltage Protection Startup Current Low standby power Operating Current MOSFET Drive Voltage Internal clamp Junction Temperature -40°C to 125°C (Recommended) Pinout Configuration (8-Pin Package)
The LZC8650C is typically available in an 8-pin package (such as SOIC-8) with the following pin assignments:
CMP: Loop compensation; used for constant current and voltage control.
FB: Zero-crossing detection, line voltage compensation, and over-voltage protection.
CS: 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
In a typical application, the LZC8650C drives an external MOSFET in a flyback topology. The input AC voltage (often 85-300 VAC) is rectified, and the IC manages the switching to maintain a constant current output (e.g., 720mA or 750mA) for the LED string. Critical components like the 8N70 MOSFET and high-temperature electrolytic capacitors (e.g., 130°C rated) are commonly paired with this IC for robust industrial or commercial lighting solutions. Which option do you prefer
For detailed design and PCB layout guidelines, refer to the full datasheet at Mouser or Datasheet4U.
The LZC8650C (often appearing in documentation as the LZC8650) is a Primary Side Regulation (PSR) and Power Factor Correction (PFC) LED Driver Controller. It is designed for isolated flyback or non-isolated Buck-Boost topologies, providing high current accuracy without the need for secondary feedback components like optocouplers. Key Technical Specifications Feature Control Mode Quasi-Resonance (QR) mode with Flyback or Buck-Boost PFC Type Single-stage Power Factor Correction (PFC) Current Control
Real-current control for accurate output from the primary side Packaging Commonly available in SOT23-6 or SOIC-8 packages Protection Features
OTP (Over Temperature), VDD OVP, Output Short/Open protection Operational Ratings
Based on equivalent series controllers like the DIO8650C, the typical electrical limits include: Supply Voltage ( VINcap V sub cap I cap N end-sub ): 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
Primary Side Regulation: Eliminates secondary feedback circuits, reducing total component count and cost.
Four-Stage Temperature Foldback: Allows flexible setting of current compensation via a single external resistor based on operating temperature.
Anti-Interference: Built-in Leading Edge Blanking (LEB) on CS/FB pins removes the need for external filtering.
Safety: Includes cycle-by-cycle current limiting and hysteresis-based thermal protection.
For detailed engineering, you can access the full technical documentation through Lozen Technology PDF Source or the Prism Electronics Product Page.
Even with the LZC8650C IC datasheet PDF, engineers sometimes make errors. Here is what the datasheet warns against:
The device regulates the LED output current by monitoring the voltage across a sense resistor on the source of the external MOSFET (CS pin). By operating in Boundary Conduction Mode, the controller turns the MOSFET on when the inductor current drops to zero, eliminating reverse recovery losses in the output diode and optimizing efficiency.
The LZC8650C is a high-efficiency, step-down (buck) constant current LED driver or a DC-DC converter, depending on the specific manufacturer’s variant. While multiple semiconductor companies produce 8650-series ICs (e.g., LX, LZ, or similar prefixes), the LZC8650C is typically characterized by:
Common applications include:
Without the LZC8650C IC datasheet PDF, designing a reliable circuit around this part is nearly impossible. The datasheet is the definitive authority on how the IC behaves under different operating conditions.
The LZC8650C is often offered in SOP-8 (small outline package) or ESOP-8 (exposed pad) packages. The datasheet includes:
