Many clone datasheets show the pinout but hide the internal block diagram. The block diagram of the LZC8650C reveals the true nature of the error amplifier, the oscillator frequency, and the protection logic. Without this, you cannot properly calculate compensation networks.
A poor datasheet lists voltage limits. A better datasheet provides a derating curve. For the LZC8650C, you need to know how the maximum output current drops as ambient temperature rises from 25°C to 85°C. If your PDF doesn't have a thermal derating graph, keep looking.
If you cannot find the PDF after trying the above:
The LZC8650C is a high-performance Primary Side Regulation (PSR) controller designed for isolated offline AC/DC flyback power converters, specifically targeting LED lighting applications. Manufactured by Lozen Technology (菱奇半导体), it integrates Power Factor Correction (PFC) to ensure high energy efficiency and low harmonic distortion. Key Technical Specifications According to manufacturer and technical data sheets: Package: SOP8 (8-pin Small Outline Package).
Operating Topology: Single-stage flyback with isolated primary-side control.
Input Voltage Range: Supports wide AC input (typically 85–300 Vac in standard driver designs).
Power Factor (PF): >0.95 with low Total Harmonic Distortion (THD <10%).
Control Method: Proprietary real-current control for accurate LED current regulation without secondary-side feedback (no opto-coupler required). Protection Features
The IC includes several built-in safety mechanisms to protect the LED driver system: OVP/UVP: Input over-voltage and under-voltage protection.
Thermal Management: Features an output current foldback function that reduces current as temperature rises to prevent overheating.
Pin Safety: Integrated protection against FB (Feedback) pin open/short and CS (Current Sense) pin open circuits. Typical Pin Configuration Based on the related LZC86xx series architecture: CMP: Loop compensation for constant current regulation.
FB: Output diode zero-current detection and reflected voltage sensing.
CS: Current sense pin for cycle-by-cycle MOSFET current limiting. GND: Power ground. DRV: Totem-pole output to drive the external power MOSFET.
VDD: Power supply pin (typically 9.5V to 27V operating range).
TS/RN: Temperature compensation setting, often connected to an NTC resistor. Data Resources & Downloads
For the full technical details, you can find the official LZC8650C documentation through these providers: Manufacturer Product Page: Lozen Technology LZC8650C
Technical Summaries: Government e-Marketplace (GeM) Technical Spec PDF
The LZC8650C (often identified with the series including the LZC8620) is a single-stage, primary-side offline LED lighting regulator. It is designed to provide high power factor (PFC) and accurate LED current control without needing secondary-side feedback components or opto-couplers, which simplifies system design and reduces costs. Key Features and Specifications
Active PFC & Quasi Resonance Mode (QRM): Reduces MOSFET switching losses and improves efficiency.
Protection Mechanisms: Includes built-in hysteresis over-temperature protection (OTP), VDD over-voltage protection, cycle-by-cycle current limiting on the CS pin, and output short-to-GND protection.
Precision Control: Features external programmable line voltage compensation to maintain precise output current across universal AC input ranges. Operating Conditions: Supply Voltage: Typically ranges from 9.5V to 27V.
Temperature Range: Operating junction temperature from -40°C to 125°C.
Package Options: Commonly available in SOT23-6 or SOIC-8 packages.
For detailed technical drawings and pin configurations, you can refer to the LZC8620 Datasheet or the DIO8650C Datasheet for a closely related alternative with similar PFC and flyback controller functions.
The LZC8650C is a high-performance, single-stage power factor correction (PFC) and LED driver IC primarily used in offline AC/DC flyback converters for LED lighting applications. It is designed by Lozen (often listed under the brand LZ) and is widely used in LED street lights and high-wattage drivers due to its efficiency and high power factor. Key Technical Specifications Package SOP8 (8-pin) or Through-Hole Switching Frequency Power Factor (PF) >0.95 at 230VAC THD <10% at 230VAC Operating Temp
Up to 150°C (junction); -25°C to 55°C (ambient driver rating) Efficiency >0.87 (full load) Complete Features
The LZC8650C belongs to a family of primary-side regulation (PSR) controllers, meaning it regulates current without needing an optocoupler, which reduces system cost and complexity.
Primary Side Control: Eliminates the need for secondary feedback circuits and optocouplers.
Quasi-Resonant (QR) Mode: Operates in QR mode with valley turn-on of the MOSFET to achieve high efficiency and low switching losses. lzc8650c ic datasheet pdf better
Real-Current Control: Proprietary method ensures accurate LED current control based solely on primary-side information.
Active PFC: Achieves a high power factor and low Total Harmonic Distortion (THD).
Temperature Compensation: Supports flexible LED current compensation via an external NTC resistor to protect LEDs from overheating. Integrated Protections
The IC includes a "complete protection function" with automatic restart after a fault is cleared:
The LZC8650C is a high-performance, single-stage Power Factor Correction (PFC) and Primary Side Regulation (PSR) controller specifically designed for isolated offline LED lighting applications. By integrating advanced control algorithms, it eliminates the need for secondary feedback components and optocouplers, significantly reducing the overall system bill of materials (BOM) and cost. Key Features and Specifications
The LZC8650C belongs to a family of LED driver ICs (like the DIO8650C and LZC8620) that focus on efficiency and power quality.
Primary Side Regulation (PSR): Achieves accurate LED current control without secondary-side feedback, simplifying the design of AC/DC flyback converters.
Active Power Factor Correction: Typically achieves a Power Factor (PF) > 0.95 and Total Harmonic Distortion (THD) < 10% at 230VAC.
Quasi-Resonant (QR) Mode: Operates in QR mode (valley switching) to minimize MOSFET switching losses and improve overall efficiency.
Thermal Management: Features an integrated temperature foldback (OTP) function that automatically reduces output current as the temperature rises, preventing catastrophic failure. Typical Value / Range Supply Voltage (VDD) 9.5V to 27V (Operating range) Startup Current ~10 µA (Extremely low for quick start) Gate Drive Clamp 16V (Internal protection for external MOSFET) Operating Temperature -40°C to 125°C Pin Configuration and Functions The LZC8650C is commonly available in a SOP-8 package.
CMP (Pin 1): Loop compensation for constant current and voltage regulation. Connects to an external RC network to ground.
FB (Pin 2): Feedback pin for zero-crossing detection (ZCD) and over-voltage protection (OVP). It senses reflected voltage from the auxiliary winding.
CS (Pin 3): Current sense pin. It monitors the voltage across a sense resistor connected to the primary MOSFET's source for cycle-by-cycle current limiting. GND (Pin 4): Power and signal ground.
DRV (Pin 5): Gate driver output to control the external power MOSFET. VDD (Pin 6): Power supply pin for the IC.
OTP (Pin 7): Thermal protection setting. Often used with an NTC resistor to set the temperature foldback point. OVP (Pin 8): Input line over-voltage protection. Application Scenarios
The LZC8650C is a staple in high-quality LED driver designs, such as:
LED Panel Lights and Downlights: Used in flicker-free lighting designs due to its stable PFC control.
Universal AC Input Drivers: Works effectively across the 85V to 305V AC range, making it suitable for global markets.
Industrial Lighting: Integrated protections like Output Short-Circuit Protection and VDD Over-Voltage Protection ensure reliability in harsh environments.
For detailed design and calculation, refer to the LZC8650C Datasheet for the latest electrical characteristics and recommended operating conditions.
(often cross-referenced with the ) is a high-performance, single-stage LED driver IC designed for offline AC/DC flyback power converters. It is widely used in LED lighting due to its high power factor and primary-side regulation (PSR) which reduces system cost by eliminating secondary feedback components. „Mouser Electronics“ Lietuva ⚡ Key Technical Specifications
Single-stage Flyback with active Power Factor Correction (PFC). Operating Mode: Quasi-Resonant Mode (QRM) for reduced switching losses. Supply Voltage ( cap V sub cap I cap N end-sub 9.5V to 27V (Typical operating range). Supply Current ( cap I sub cap V cap I cap N end-sub Maximum Power Dissipation: 1.1W (SOIC-8) or 0.6W (SOT23-6). Junction Temperature: -40°C to 125°C. Available in (8-pin) and „Mouser Electronics“ Lietuva 🛠️ Core Features Primary-Side Regulation:
Controls output current from the primary side information, eliminating the need for an opto-coupler. High Power Factor: Achieves high PF through constant on-time operation. Real-Current Control:
Proprietary method for high-accuracy LED current regulation. Temperature Compensation:
Supports NTC resistors for flexible current compensation at specific temperatures. Integrated Protections: Cycle-by-cycle current limiting. VDD over-voltage protection (OVP). Output short-to-GND and open-circuit protection. Hysteresis-based over-temperature protection (OTP). taoic.oss-cn-hangzhou.aliyuncs.com 📍 Pin Configuration (SOP8) Description Loop compensation for constant current regulation. Zero-current detection and reflected voltage sensing. Current sense pin; connects to the MOSFET source. Power Ground. Gate driver output to external power MOSFET. Power supply input for the IC. Temperature compensation point setting. Connection for NTC resistor (temperature compensation). 📥 Datasheet Access
For the complete technical documentation, you can typically find the official PDFs at: DIO8650C Datasheet via Mouser (Commonly used equivalent). LZC8620 Datasheet via Taoic (Directly related series). „Mouser Electronics“ Lietuva If you cannot find the "C" revision specifically, the
is a high-performance, single-stage LED lighting regulator designed primarily for primary-side regulation (PSR) in offline applications. By eliminating the need for secondary feedback components like opto-couplers, it simplifies circuit design and reduces overall system costs. Key Specifications & Features is often used in LED drivers ranging from 45W to 110W.
PFC & Efficiency: Features integrated active Power Factor Correction (PFC), typically achieving PF > 0.95 and Total Harmonic Distortion (THD) < 10%. Many clone datasheets show the pinout but hide
Operating Mode: Works in Quasi-Resonance Mode (QRM) to minimize MOSFET switching losses and improve thermal performance.
Supply Voltage: Recommended operating VDD range is typically between 9.5V and 27V.
Protection Suite: Includes over-voltage protection (OVP), over-temperature protection (OTP), output short-circuit protection, and cycle-by-cycle current limiting.
Package Options: Commonly available in SOT23-6 or SOIC-8 formats to suit different PCB space requirements. Pin Configuration (Standard SOIC-8)
While exact layouts can vary by manufacturer, a typical LZC8650C series pinout includes: VDD: Power supply input. GATE (or DRV): Drives the external power MOSFET. CS: Current sense input for cycle-by-cycle limiting.
FB (or ZCS): Feedback pin for zero-current sensing and output voltage regulation. COMP: Compensation pin for stabilizing the control loop. Where to Find the Official Datasheet
For the most accurate design-in data, you can download the LZC8650C PDF from major electronic component distributors and specialized IC repositories:
Detailed technical specifications are available via Prism Electronics.
Direct PDF downloads for related series (like the DIO8650C or LZC8620) can be found at Mouser Electronics and TaoIC. Application Tips
Thermal Management: The IC has a junction temperature rating of up to 150°C, but it is best to keep it within the recommended operating range of -40°C to 125°C for long-term reliability. Soft-Start:
Use the built-in soft-start feature to prevent inrush current spikes that can stress input capacitors and MOSFETs. Equivalent ICs: If the is unavailable, the
is a highly compatible alternative often used in the same flyback and PFC controller applications.
Introduction
The LZC8650C is a highly integrated power management IC (PMIC) designed for portable devices, such as smartphones, tablets, and other battery-powered applications. The IC is manufactured by a reputable company and is widely used in various electronic devices.
Datasheet Overview
The LZC8650C datasheet PDF provides detailed information on the IC's features, specifications, and applications. Here's a summary of the key points:
How to Read the Datasheet
To effectively use the LZC8650C datasheet PDF, follow these steps:
Additional Tips
By following this guide, you'll be able to effectively use the LZC8650C datasheet PDF to design and develop applications that leverage the IC's features and performance.
is a high-performance, single-stage Primary Side Regulation (PSR) Power Factor Correction (PFC) LED driver controller manufactured by Lozen Technology
. It is primarily designed for offline AC/DC flyback power converters used in LED lighting, offering high efficiency and a high power factor ( is greater than 0.95 ) with minimal external components. Key Features & Technical Specifications High Power Factor & Efficiency : Integrates active PFC and operates in Quasi-Resonance Mode (QRM)
to reduce MOSFET switching losses and achieve low Total Harmonic Distortion (THD < 10%). Primary Side Control
: Eliminates the need for secondary-side feedback components and opto-couplers, significantly simplifying system design. Thermal Management
: Features internal temperature compensation and support for flexible current settings via an external NTC resistor. Protection Suite Cycle-by-cycle current limiting on the CS pin. Over-Voltage Protection (OVP) for both VDD and output. Output short-circuit and open-load protection. Thermal shutdown (OTP) with hysteresis. taoic.oss-cn-hangzhou.aliyuncs.com Pin Configuration (SOP8 Package) The LZC8650C typically comes in a standard www.prismelectronics.co.in Description Power supply pin for the IC.
Loop compensation pin; requires an external RC network to stabilize the control loop. Ground reference. Gate driver output pin for the external primary MOSFET.
Current sense pin used for cycle-by-cycle current limiting and transformer monitoring.
Zero-crossing detection for the inductor current; also provides OVP. Common Applications General LED Lighting : Widely used in bulb lamps, tube lamps, and PAR lamps. High-Power Industrial Lighting The LZC8650C is a high-performance Primary Side Regulation
: Suitable for warehouse lighting and streetlights due to its high temperature resilience (up to 105°C) and robust power isolation. AC/DC Converters
: Integrated into drivers for offline AC/DC flyback power converters. www.prismelectronics.co.in
For procurement, components like these are often available through industrial distributors such as Prism Electronics (for similar cross-references like the DIO8650C). „Mouser Electronics“ Lietuva cross-reference to replace this IC in an existing LED driver?
is a single-stage PFC (Power Factor Correction) controller designed for primary-side regulated (PSR) offline LED lighting applications. It simplifies designs by eliminating secondary-side feedback components like optocouplers while maintaining high power factor and accurate current control. Key Specifications & Features Topology: Quasi-Resonance (QR) mode with Flyback.
Power Efficiency: Achieves high power factor (PF > 0.95) and low THD (< 10%). Operating Voltage: Typical supply range of 9.5V to 27V.
Temperature Range: Recommended junction temperature of -40°C to 125°C. Protection Suite: Cycle-by-cycle current limiting on the CS pin. Building-in hysteresis Over-Temperature Protection (OTP). VDD and output Over-Voltage Protection (OVP). Output short-circuit and open-circuit protection. Technical Parameters (Reference) Typical Value / Rating Max Supply Voltage (VIN) 33V (Absolute Max) Operating Current Output Current Precision ±3% to ±5% (Application dependent) Thermal Resistance (SOIC-8) 100 °C/W (ΘJA) Switching Mode Quasi-Resonance for reduced MOSFET losses
💡 Pro-Tip: The LZC8650C is frequently used in 45W to 110W LED drivers, often paired with high-voltage MOSFETs like the 8N70. Datasheet Links
Full PDF specifications for similar models (LZC8620/LZC8650) are hosted on TaoIC and technical component listings at Prism Electronics
For a high-quality alternative with nearly identical specs and pinouts, check the datasheet on Mouser.
LZC8650C IC: High-Efficiency PSR & PFC LED Driver Controller
(and its variants like the LZC8650B) is a high-performance, single-stage LED lighting regulator designed by Lozen Technology
. It is widely used in offline AC/DC flyback converters for industrial, commercial, and outdoor lighting due to its high power factor and minimal external component requirements. Key Specifications & Features Primary Side Regulation (PSR):
Eliminates the need for secondary side feedback components and opto-couplers, significantly reducing system costs. High Power Factor Correction (PFC): Achieves PF >0.95 and low THD (<10%) at 230VAC. Quasi-Resonance Mode (QRM):
Operates in QRM to reduce MOSFET switching losses and improve overall efficiency. Precise Current Control:
Uses a proprietary real-current control method for accurate LED current regulation. Protection Suite: Built-in over-temperature protection with hysteresis. Input and VDD over/under voltage protection. Short Circuit: Reliable output short-to-GND protection. Cycle-by-cycle current limiting on the CS pin. Pinout Configuration (SOP8 Package) The LZC8650C typically utilizes an SOP8 (SOIC-8) package with the following pin functions: Description
Loop compensation; connect RC network to ground for CC/CV stability.
Output diode zero-current detection and over-voltage protection. Current sense; monitors MOSFET current via sense resistor. System and power ground. MOSFET gate drive output; internally clamped to 16V. Power supply pin. Temperature foldback point setting; supports NTC resistors. Input line voltage over-voltage protection setting. Common Applications LED Streetlighting:
Its robust thermal design makes it ideal for outdoor environments. Commercial Lighting: Used in high-power LED panels and architectural lighting. Industrial Power Supplies: Trusted for high-power isolation and reliability. Datasheet Resources
For full electrical characteristics and typical application circuits, you can refer to the following sources:
You're looking for a solid paper or a detailed datasheet on the LZC8650C IC. Unfortunately, I don't have direct access to specific datasheets or papers. However, I can guide you on where to find the information and provide some general insights.
What is LZC8650C? Before diving into the datasheet, it's essential to know what the LZC8650C IC is. A quick search reveals that the LZC8650C is a power management IC (PMIC) designed for specific applications, possibly in the field of LCD displays or LED lighting, given the "LC" prefix which often denotes a product related to lighting or LCDs.
Finding the Datasheet:
Google Search: Sometimes, a simple Google search with the part number and keywords like "datasheet," "specifications," or "pdf" can lead you directly to the datasheet or related documents.
What to Look for in a Datasheet: When you locate the datasheet for the LZC8650C, here are some key points you might want to examine:
If you're unable to find the datasheet or need further clarification on certain aspects of the LZC8650C, consider reaching out directly to the manufacturer or consulting with electronics engineering communities or forums. They can provide valuable insights or direct you to the resources you need.
If you cannot find a better datasheet for the LZC8650C, or if the IC is out of stock, here are three direct competitors. Use their datasheets to compare:
| Parameter | LZC8650C | MP4560 (MPS) | LM2596 (TI) | | :--- | :--- | :--- | :--- | | Max Input Voltage | 55V (Typical) | 55V | 40V | | Max Output Current | 3A | 2.5A | 3A | | Switching Frequency | ~150kHz (Variable) | 2.1MHz (Fixed) | 150kHz | | Better Datasheet? | Hard to find | Excellent (MPS) | Excellent (TI) | | Best For | Low-cost LED driving | Low-EMI industrial | Legacy designs |
Can the LZC8650C really deliver 2A at 85°C ambient? A better datasheet gives thermal resistance (θJA, θJC) and derating curves, not just a single “max current” spec.
Do not just trust the first PDF link from a random electronics forum. Instead: