CXLE86143 is a high-voltage drive IC with dedicated critical energy storage linear constant current control architecture, built-in 500V withstand voltage process manufacturing, with high reliability and stability. It realizes accurate control of LED load through unique dual current source structure (constant flow source and variable current source), and can realize high power factor and no stroboscope output without traditional electrolytic capacitor, the service life and light quality of the system are greatly improved. The chip integrates programmable power limit and over-temperature protection functions to effectively reduce the cooling cost of the system and improve the overall reliability.
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[ CXLE86143 ]"
CXLE86143: high power factor stroboscope-free linear LED driver chip to create efficient and stable lighting solutions
In modern LED lighting applications, the performance of the driving circuit directly affects the energy efficiency, life and light quality of lamps. CXLE86143, as a linear constant current LED driver integrated circuit based on critical energy storage mode, has become an LED bulb, lamp tube, with its excellent characteristics of high power factor, no stroboscope output, low electromagnetic interference, etc, ideal for ceiling lights and other applications. This article will comprehensively analyze the technical characteristics, working principles and design points of CXLE86143, and help engineers build lighting systems that meet the requirements of laws and regulations and have excellent performance.
I. Product Overview
CXLE86143 is a high-voltage drive IC with dedicated critical energy storage linear constant current control architecture, built-in 500V withstand voltage process manufacturing, with high reliability and stability. It realizes accurate control of LED load through unique dual current source structure (constant flow source and variable current source), and can realize high power factor and no stroboscope output without traditional electrolytic capacitor, the service life and light quality of the system are greatly improved. The chip integrates programmable power limit and over-temperature protection functions to effectively reduce the cooling cost of the system and improve the overall reliability.
Second, core features
• High Power factor: meets the requirements of energy regulations. The typical pfvalue is greater than 0.9.
• No stroboscope output: ensures visual comfort and is suitable for high-quality lighting scenarios.
• Low EMI design: simplify the filter circuit and reduce the system cost.
• Programmable power limit: set the upper limit of input power through the PLIM pin to adapt to different mains voltage.
• Over-temperature protection mechanism: automatic derating or shutdown to prevent thermal failure.
• High Pressure integration process: 500V withstand voltage, adapt to power grid fluctuation and transient impact.
• Simple peripheral circuit: no need for magnetic components, compact structure.
• Environmentally friendly packaging: ESOP8 package, excellent heat dissipation, support automatic production.
Second, typical application scenarios
CXLE86143 is widely applicable to the following lighting products:
•LED bulb, candle light
•LED T5/T8 lamp tube
•LED ceiling light, panel light
•Other non-isolated linear LED driving schemes
Third, electrical characteristics and performance advantages
In the typical input voltage range (180V-270V),CXLE86143 shows the following superior performance:
•High constant current precision: the output current is stable and is not affected by grid fluctuations.
•Excellent efficiency: maintain high conversion efficiency in the full voltage range.
•Low chord: The total harmonic distortion meets the requirements of lighting regulations.
•Fast response to power limit: PLIM function effectively controls system power consumption under high voltage.
The measured data shows that under the condition of 220V input, the power factor of the system can reach more than 0.95, and the efficiency exceeds 85%, showing excellent comprehensive performance.
IV. Functional description and Design Guide
4.1. Working principle of critical energy storage
CXLE86143 adopts the control mode of constant flow source and variable current source working together. In each mains cycle:
•Discharge stage: when the mains voltage is lower than the energy storage capacitor voltage, constant flow Source leads the discharge to maintain the LED current stability.
•Charging stage: when the mains voltage rises, the variable current source charges the capacitor. The critical control circuit adjusts the charging current to make the system work in a critical state, realizing efficient energy transfer and stable output current.
4.2. Current setting method
•Constant flow source current: set by the external resistor of the CCS pin:
•Maximum current of variable current source:
4.3. Power limit setting
When the voltage of the PLIM pin is greater than 2.5V, the chip automatically reduces the internal reference and limits the system power. The power reduction starting point can be set through external R1 and R2 divider resistance to adapt to different input voltage conditions.
4.4. Power supply mechanism
The internal integration of the chip consumes 500V and takes power directly from the CC pin, maintaining the stability of VCC in the range of 6V-500V at 5.5V, ensuring the reliable operation of the control circuit.
V. Suggestions on peripheral component selection
5.1. Energy storage capacitor
We recommend that you use thin-film capacitor or high-tension ceramic capacitor with a withstand voltage higher than 400V. The capacity is selected according to the requirements of LED current and retention time. The typical value is 1-4.7 μF.
5.2. Current setting resistance
Metal film resistor with high precision and good temperature characteristics should be selected. It is recommended that the precision ≥ 1%.
5.3. Power limiting resistor
R1 and R2 should be calculated according to the target derating voltage point. It is recommended to use resistance with good withstand voltage and stability.
5.4 diode selection
D1 and D2 should choose high voltage and fast recovery diode, and reverse withstand voltage should be higher than the maximum system voltage.
VI. Layout and heat dissipation suggestions
•The wiring of high voltage parts (CC, VC) should be kept at a safe distance to avoid the risk of creepage.
•Signal pins such as CCS, VCS, and PLIM should be far away from high-voltage nodes to prevent noise coupling.
•The heat dissipation pad at the bottom of the chip should be fully connected to the PCB ground plane to improve the thermal conductivity.
•In high temperature or high power applications, the area can be appropriately increased by copper cover or supplemented with heat dissipation coating.
Seven packaging and supply information
CXLE86143 adopts ESOP8 package, which has good heat dissipation performance and electrical isolation characteristics. The product supports reel packaging, 2500 PCs per reel, which is suitable for large-scale and automatic production.
VIII. Conclusion
With its high power factor, no stroboscope output, programmable power limit and perfect protection function, CXLE86143 provides an efficient, reliable and compact driving solution for LED lighting system. Whether in domestic lighting, commercial lighting or industrial lighting applications, its excellent performance and stability can meet the high requirements of modern lighting systems for energy efficiency and quality. For detailed data manuals, sample applications, or further technical support, please visitJTM-IC official websiteQuery.
