Lzc8650c Ic Datasheet Pdf -
To understand the utility of the LZC8650C, one must look at its internal architecture as defined in the datasheet. The IC is typically housed in compact packages (such as SOP-8 or SOT-23-6 variants depending on the specific revision), allowing for high-density PCB layouts.
The datasheet specifies the maximum input voltage, junction temperature, and power dissipation. Exceeding these values—even momentarily—can destroy the IC. For example, one variant of the 8650 series has an absolute maximum of 45V, but the recommended operating range is 8-40V.
Major distributors like Mouser, Digi-Key, LCSC, or Newark often host datasheets directly from the manufacturer. Use their search bar with the exact part number. These PDFs are verified and virus-free.
Searching for "LZC8650C IC datasheet PDF" online often leads to a mix of third-party summary sites, forum discussions, or incomplete data. However, relying on unofficial sources can be dangerous for product development. Here is why the official PDF is indispensable:
The LZC8650C utilizes a high-voltage startup circuit connected to the rectified AC line (via the HV pin). This charges the VCC capacitor rapidly. Once the VCC voltage reaches the UVLO threshold, the internal logic activates. After startup, the IC is typically self-powered via an auxiliary winding from the transformer.
Search the part number plus manufacturer name or “datasheet PDF” on component distributor sites or the manufacturer's website to obtain the authoritative PDF containing absolute maximum ratings, electrical characteristics, typical performance curves, pin descriptions, application circuits, and layout recommendations.
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(often branded under Lozen Technology ) is a primary-side control LED driver IC
designed to simplify the design of high-power-factor LED lighting. It is widely used in isolated Flyback and non-isolated Buck-Boost topologies, providing high efficiency by operating in Quasi-Resonant Mode (QRM) taoic.oss-cn-hangzhou.aliyuncs.com Core Functionality and Features
The LZC8650C is engineered to eliminate the need for secondary feedback components like opto-couplers, which significantly lowers system cost and complexity. „Mouser Electronics“ Lietuva Primary-Side Regulation (PSR):
Achieves accurate constant current control by monitoring information only from the primary side of the circuit. High Power Factor:
Typically achieves a power factor >0.95 and low Total Harmonic Distortion (THD < 10%) at standard AC voltages. Quasi-Resonant Mode (QRM):
The IC utilizes valley turn-on for the primary MOSFET, which reduces switching losses and EMI. Four-Segment Temperature Foldback:
This unique feature allows the IC to adjust the LED current based on the operating temperature, which can be configured via a single external resistor. Quick Start-up:
Designed for a fast start-up time (typically <500ms) with very low start-up current (15µA). „Mouser Electronics“ Lietuva Typical Applications
This IC is primarily targeted at commercial and residential LED lighting solutions, including: Isolated Flyback LED drivers. Non-isolated Buck-Boost LED power supplies.
High-efficiency PFC (Power Factor Correction) controllers for low-cost drivers. „Mouser Electronics“ Lietuva Protection Mechanisms
The LZC8650C includes a robust suite of safety features to ensure reliable operation under fault conditions: Over-Voltage Protection (OVP):
Includes both auxiliary winding and VDD secondary over-voltage protection. Short and Open LED Protection:
Automatically handles output short-to-ground or open-circuit states. Cycle-by-Cycle Current Limiting:
Protects the internal MOSFET by limiting the peak current during every switching cycle. Over-Temperature Protection (OTP): Built-in hysteresis prevents damage from thermal runaway. taoic.oss-cn-hangzhou.aliyuncs.com Technical Specifications Summary Description Package Types Often available in Start-up Current 15µA (typical). < 10% @ 230VAC. Topology Support Flyback, Buck-Boost. Control Method Primary Side Constant Current.
For detailed pinout diagrams and maximum stress ratings, you can reference the LZC8650C Chinese/English Datasheet or similar primary-side controllers like the which shares a near-identical application profile. „Mouser Electronics“ Lietuva schematic example for an isolated Flyback design using this IC? lzc8650c ic datasheet pdf
The LZC8650C represents a class of driver ICs that balance cost-effectiveness with high-end performance. Its ability to deliver precise constant current without complex feedback loops makes it an ideal candidate for the mass production of LED tubes, bulbs, and panel lights.
For any design engineer looking to utilize this component, the LZC8650C datasheet PDF is the essential starting point. Mastery of its timing diagrams, thermal constraints, and protection logic is the difference between a prototype that works on a bench and a commercial product that survives years in the field.
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 LZC8650C is a primary-side offline LED lighting regulator designed for high-efficiency AC/DC flyback power converters. It is frequently used in LED driver boards, such as those found in floodlights and indoor lighting, due to its ability to achieve high power factor (PFC) and precise current control without secondary feedback components. Key Technical Specifications
The LZC8650C typically operates within the following parameters based on its manufacturer, Lozen Semiconductor (菱奇半导体): Package Type: SOP-8 (8-pin Surface Mount).
Operating Mode: 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
Over-Voltage Protection (OVP) and Under-Voltage Lockout (UVLO). Output short-circuit and open-circuit protection.
Over-Temperature Protection (OTP) with programmable current reduction. Pinout Configuration (SOP-8)
The pin configuration for the LZC8650 series generally follows this standard layout: CMP: Loop compensation for constant current regulation.
FB: Feedback pin to detect zero current and regulate output.
CS: Current sense pin connected to a resistor for MOSFET current monitoring. GND: Power ground.
DRV: Totem-pole output to drive the external power MOSFET (clamped at ~16V). VDD: Power supply pin. TS: Temperature compensation setting point.
RN: Connection for an NTC resistor to enable thermal compensation. Typical Application
This IC is designed for "Primary Side Regulation" (PSR), which eliminates the need for an optocoupler and TL431 on the secondary side, reducing both cost and board space. You can find these chips at electronic component retailers like IndiaMart or Prism Electronics.
The LZC8650C is a high-performance, single-stage LED driver integrated circuit (IC) designed primarily for high-power factor (PFC) LED lighting applications. It is frequently utilized in offline AC/DC flyback power converters to provide stable, constant-current regulation without the need for secondary-side feedback components, such as opto-couplers, which simplifies overall circuit design. Core Functionality and Design To understand the utility of the LZC8650C, one
The LZC8650C operates in Quasi-Resonance Mode (QRM), 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.
Key specifications often highlighted in its technical documentation include:
High Power Factor: Typically >0.95, ensuring compliance with international energy standards.
Low Total Harmonic Distortion (THD): Often <10%, which minimizes electrical noise back into the power grid.
Thermal Management: 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:
Input Voltage Range: Wide universal AC input, typically 85V to 300V AC. Package Type: Available in 8-pin SOIC (SOP-8) packages.
Protection Features: Integrated Over-Voltage Protection (OVP), Under-Voltage Protection (UVP), Over-Temperature Protection (OTP), and cycle-by-cycle current limiting.
Operating Temperature: Robust performance between -40°C and 85°C ambient temperature. Typical Pin Configuration
Standard SOP-8 variants of this IC generally follow this functional pinout:
CS (Current Sense): Connects to the primary switch's source to monitor current and detect short circuits. GND: Ground reference.
COMP: Connection for an RC network to stabilize the control loop.
ZCS (Zero Crossing Sense): Detects when the inductor current reaches zero for QRM operation and provides line regulation. VIN/VDD: Power supply pin for the IC.
DRV (Gate Driver): Connects to the gate of the external power MOSFET. Applications
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.
Automotive and industrial power solutions requiring over-voltage protection.
Engineers can find further technical details and reference designs through professional components distributors like Mouser or manufacturer-specific portals.
The (also marketed under the brand DIOO as ) is a high-performance, single-stage LED driver IC designed for offline flyback power converters. It is widely used in LED lighting for its ability to provide high power factor (PF > 0.95) and low total harmonic distortion (THD < 10%). 🛠️ Key Technical Specifications
operates as a primary-side controller, meaning it does not require an opto-coupler for feedback, which simplifies design and reduces cost.
Input Voltage Range: Universal AC (typically 85V - 300V AC). Operating Voltage (VDD): 9.5V to 27V.
Switching Mode: Quasi-Resonant (QR) mode to reduce MOSFET switching losses. Start-up Current: Extremely low (15µA typical).
Protections: Built-in over-voltage (OVP), short-circuit, and over-temperature protection (OTP). 📍 Pinout Configuration (8-Pin SOP)
Based on common datasheet configurations for this series from Prism Electronics: Description 1 CMP Loop compensation for constant current regulation. 2 FB Which option do you prefer
Feedback pin; senses reflected voltage from auxiliary winding. 3 CS
Current sense pin; connects to a resistor to monitor MOSFET current. 4 GND Power Ground. 5 DRV Totem-pole output to drive the external power MOSFET. 6 VDD Power supply pin. 7 TS Temperature compensation point setting. 8 RN Connects to an NTC resistor for thermal management. 📄 Datasheet Resources
You can find detailed PDF versions and technical summaries through the following sources:
Official Summary: View specifications at Prism Electronics or IndiaMart Equivalent Model (
): A comprehensive technical datasheet is available via Mouser Electronics, which covers the exact same electrical characteristics and application circuits.
💡 Design Tip: When using this IC, ensure the CS resistor is sized correctly for your target output current, as this determines the primary-side peak current limit.
If you'd like, I can help you calculate the component values for a specific output wattage or troubleshoot a circuit that isn't starting up.
The LZC8650C is a Primary-Side Regulation (PSR) controller designed for offline AC/DC flyback power converters, specifically targeting LED lighting applications. Manufactured by Lozen Technology (菱奇半导体), this IC is known for achieving a high power factor and accurate real-current control. Technical Overview Package Type: SOP-8 (8-pin Surface Mount).
Application: High-power isolated LED drivers, typically used in LED bulbs and tube lighting.
Control Method: Primary-side modulation (PSR), which eliminates the need for an optocoupler and secondary-side control circuitry, reducing cost and size. Key Performance Specifications
Based on typical configurations for this series (including related models like DIO8650C or LZC8620): Supply Voltage ( VDDcap V sub cap D cap D end-sub ): Typically operates between 9.5V and 27V. Maximum VINcap V sub cap I cap N end-sub /Drive: Up to 33V.
Power Dissipation: Approximately 1.1W for the SOIC-8 package.
Thermal Resilience: Rated for junction temperatures from -40°C up to 125°C. Protection Features
The LZC8650C integrates several safety mechanisms to ensure driver longevity:
Input Protection: Over-voltage (OVP) and under-voltage (UVP) protection.
Thermal Management: Built-in hysteresis Over-Temperature Protection (OTP) and an output current foldback feature that reduces current as temperature rises.
Fault Protection: Output short-to-ground protection and cycle-by-cycle current limiting on the CS pin.
Temperature Compensation: Supports external NTC resistor connection for precise thermal adjustment. Pin Configuration (SOP-8) Description COMP Loop compensation for constant current regulation. FB Feedback pin; detects zero current to regulate output. CS
Current sense pin; connects to a resistor to sense MOSFET current. GND Power ground. DRV
Gate drive output for the external power MOSFET (clamped at 16V). VDD Power supply input. TS Temperature compensation point setting. RN NTC resistor connection for thermal compensation.
For the full technical manual, you can view the LZC8620 series reference or check the manufacturer's product page at Lozenic.
The LZC8650C is a high-performance, isolated LED driver controller IC designed for offline AC-DC LED lighting applications. It is typically utilized in non-dimmable or dimmable LED bulb and tube light designs. The chip operates in Boundary Conduction Mode (BCM) or Critical Conduction Mode (CrM), offering a cost-effective solution for low-to-medium power LED drivers.
The device is engineered to provide high Power Factor Correction (PFC) and low Total Harmonic Distortion (THD), making it compliant with international lighting standards (such as ENERGY STAR and IEC 61000-3-2). Its ultra-low start-up current and proprietary control algorithms allow for high efficiency and reliable operation.