CXLE87133AB4 is a four-channel high-precision constant current output LED driver chip that supports DMX512 single-wire parallel protocol. It is not only fully compatible with DMX512(1990) standard protocol, but also extends its function to support adaptive decoding with transmission rate between 200Kbps and 1000Kbps without external settings, which greatly improves the flexibility and adaptability of the system. The chip has a maximum addressing capacity of 4096 channels and is suitable for large-scale, high-density LED lighting systems.
-
[ CXLE87133AB4 ]"
CXLE87133AB4: high performance DMX512 single line parallel LED driver chip
In today's intelligent lighting and decorative lighting system, DMX512 protocol is widely used in stage lighting, building exterior lighting, landscape lighting and other fields because of its efficient and flexible characteristics. As a high-performance driver chip designed for modern LED lighting systems,CXLE87133AB4With its excellent compatibility, high-precision output and strong anti-interference ability, it has become the first choice for many lighting solutions. This article will provide an in-depth analysis of the chip's technical features, application scenarios, and design points to help engineers and project developers better understand and apply the product.
1. Product Overview
CXLE87133AB4 is a supportDMX512 Single Wire Parallel ProtocolFour-channel high-precision constant current output LED driver chip. It is not only fully compatible with the DMX512(1990) standard protocol, but also has been extended to support the transmission rate.200Kbps to 1000Kbpsadaptive decoding, without external settings, greatly enhance the flexibility and adaptability of the system. The chip has a maximum addressing capacity4096 channelSuitable for large-scale, high-density LED lighting systems.
2. core features
2.1. High compatibility and adaptive decoding.
The CXLE87133AB4 adopts the patented high-speed DMX512 supplementary algorithm, which can automatically identify and decode DMX512 signals of different rates without adjusting the hardware, ensuring the stable operation of the system in various transmission environments.
2.2. Built-in E2PROM and online code writing.
Chip built-in E2PROM memory, no external storage components, support.Online Cascade Code Writingfunction. Through the dedicated address code line (PI/PO), users can write addresses to up to 1024 chips at one time within the range of point spacing not exceeding 100 meters, realizing "installation before code writing" and greatly simplifying the construction and maintenance process.
2.3. High precision constant current output
The CXLE87133AB4 provides four (R/G/B/W) constant current output channels, and the default output current of each channel is18mA, accuracy up to ± 3% (± 5% between chips), output port withstand voltage up26VSuitable for a variety of LED lamp bead combination and series scheme.
2.4. Strong anti-interference and reliability
Chip built-in S-AI anti-interference module, with 8 anti-interference and check mechanism, effectively prevent miswritten code and data loss. Using the dual E2 address code backup design, even if a storage unit is damaged, the system can still read the address information normally.
2.5. Industrial grade design
The operating temperature range of the chip is-40 ℃ to 85 ℃, the encapsulation form isESOP8With good heat dissipation and welding reliability, it is suitable for all kinds of harsh environments.
3. typical application areas
CXLE87133AB4 is widely used in the following scenarios:
• Point light source and pixel screen
• Line lights and wall washer lights
• Stage lighting and performance system
• Indoor and outdoor video walls and decorative lighting
• Building facade lighting and landscape engineering
Its parallel architecture design ensures that the failure of any chip in the system does not affect the operation of other units, and the maintenance is convenient and the system reliability is high.
4. electrical characteristics and design recommendations
4.1. Working conditions
• Logic supply voltage: 3.8V ~ 6V (5V recommended)
• Output port withstand voltage: up to 26V
• Quiescent current: 3mA typical
4.2. Voltage division resistance calculation
In order to ensure the stability of the chip, the voltage division resistance value should be calculated according to the number of power supply voltage and LED series connection. For example, in the case of 24V power supply and 6 LEDs in series:
• Red light (VF = 2V):R = (24V-6 × 2V - 3V) / 18mA & asynp; 500Ω
• Green/blue/white lamp (VF = 3V):R = (24V-6 × 3V - 3V) / 18mA & asynp; 150Ω
4.3. System cabling recommendations
In the parallel system, the ground pressure difference is the key factor affecting the stability. It is recommended to connect the power "-" poles of all lamps directly through the shortest path to avoid detour grounding to reduce differential pressure interference.
5. Code Writing and Debugging Guide
CXLE87133AB4 supportOnline code writing and real-time effectAfter the code writing is completed, the chip will automatically check and turn on the blue light to indicate success, and there is no need to power on again. When writing codes, ensure that the DI line is connected to the/D terminal of the code writer and keep the PI port at high level.
6.Pins and Functions
Seven,Application Information
7.1. Application Figure 1: General Application
2. Without routing amplifier application, 250K standard speed should be adopted, and it is not recommended to expand to 500K. At 250K standard speed,
To reach nearly 25 frames, the number of single-port connection points of the controller should not exceed 220 points. If less than 25 frames are allowed, more points can be connected under certain conditions.
Application mode. In routing amplifier applications, the controller to the amplifier for the 485 differential transmission, the amplifier will differential signal into a single line signal,
The distance between the amplifier and the lamp should be as short as possible.
8. epilogue
As a comprehensive and reliable DMX512 LED driver chip, CXLE87133AB4 not only has high-precision output, strong anti-interference and flexible code writing function, but also is suitable for a variety of complex lighting scenes. Whether it is stage effect or architectural decoration, the chip can provide stable and efficient driving solutions.
For more information about CXLE87133AB4 and other IC products, please visit 【JTM-IC.com]-a high-quality integrated circuit solution partner around you.
Nine,Related Chip Selection Guide Download ► More similar products....
