The CXLE87207 integrates a rainbow jumping pattern program, MCU digital interface, data latch, and nine high-voltage drive circuits internally, with dual working modes of external control and internal control. In external control mode, the chip can receive controller instructions through a single wire interface to achieve precise brightness and cascade control; In internal control mode, the chip automatically switches to the built-in rainbow pattern program when a signal interruption is detected, ensuring that the system can maintain dynamic display effects even without external control signals, greatly improving the reliability and adaptability of the system to different scenarios.
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[ CXLE87207 ]"
CXLE87207: Intelligent dual-mode nine channel LED driver chip, empowering outdoor color screens and iridescent lighting
In application scenarios such as outdoor LED displays, colorful light strips, and guardrail tubes, the driver chip not only needs to have high precision and control flexibility, but also needs to cope with signal interruption and high-voltage working requirements in complex environments. CXLE87207, as a nine channel LED constant voltage drive control dedicated circuit that integrates external and internal control, has become an ideal solution for outdoor color dot matrix lighting systems due to its high voltage tolerance, dual-mode automatic switching, and high integration. This article will deeply analyze its technical characteristics, working modes, and typical applications, providing comprehensive references for engineering design.
1、 Chip Overview
The CXLE87207 integrates a rainbow jumping pattern program, MCU digital interface, data latch, and nine high-voltage drive circuits internally, with dual working modes of external control and internal control. In external control mode, the chip can receive controller instructions through a single wire interface to achieve precise brightness and cascade control; In internal control mode, the chip automatically switches to the built-in rainbow pattern program when a signal interruption is detected, ensuring that the system can maintain dynamic display effects even without external control signals, greatly improving the reliability and adaptability of the system to different scenarios.
2、 Core functional features
• Nine channel high voltage outputSupports nine LED drivers, with a voltage resistance of 32V per channel, suitable for outdoor high-voltage working environments.
• Dual mode of external control and internal controlSupports precise dimming and cascading control of external controllers, automatically switches to the built-in rainbow pattern program when disconnected.
• High precision brightness adjustment256 level PWM regulation, equivalent to 1024 levels at low brightness, achieving smooth and delicate brightness changes.
• High voltage compatibility and wide voltage inputBoth the data and driver ports have a withstand voltage of 32V, and the VDD external series resistor supports a wide voltage input of 6-32V.
• Single line serial cascadeCapable of automatic signal shaping, cascading signals without attenuation, supporting long-distance and multi node deployment.
• Dual rate communication modeSupports two data transmission rates of 400Kbps and 800Kbps to meet different refresh rate requirements.
• High refresh rate supportAt a refresh rate of 30fps, low-speed mode supports 512 point cascading, while high-speed mode supports 1024 point cascading.
3、 Electrical characteristics and packaging
• Working voltage range6V~32V (configured through external resistor)
• Communication interface withstand voltage：32V
• PWM scanning frequency：≥900Hz
• package form：SOP14， Suitable for high-density PCB layout
• Operating TemperatureIndustrial grade range, suitable for harsh outdoor environments
4、 Detailed explanation of working mode
1. External control mode (controlled mode)
In this mode, the chip receives dimming and pattern commands from an external controller through DIN pins, achieving precise control of brightness, color, and dynamic effects. Suitable for occasions that require real-time response and multi device synchronization, such as outdoor large screens, performance lighting, etc.
2. Internal control mode (autonomous mode)
When the chip cannot detect a valid external signal, it automatically switches to internal control mode and executes the built-in rainbow jump pattern program. This function effectively avoids the display black screen caused by signal interruption and is suitable for guardrails, landscape lighting, etc; Self running” The scenario of ability.
5、 Typical Application Design Guidelines
5.1. System cascading and refresh rate configuration
Users can choose between 400Kbps or 800Kbps communication rates based on the system size. Taking 800Kbps as an example, at a frame rate of 30fps, a single system can support over 1000 pixels, meeting the refresh requirements of most medium to large dot matrix systems.
5.2. Power supply design and resistor selection
The chip VDD requires an external series resistor to adapt to an input voltage of 6-32V. When designing, the resistance value should be calculated based on the actual power supply voltage and operating current to ensure stable operation of the chip at 5V logic voltage.
5.3. Signal link protection
In long-distance, multi node applications, it is recommended to install transient voltage suppression devices at the signal line entrance to prevent outdoor lightning strikes or voltage surges from damaging the communication link.
6、 Application scenarios
• Outdoor full-color LED display screen
• Guardrail tubes and colorful light strips
• Architectural facade lighting and landscape lighting
• Stage lighting and performance equipment
• Advertising signage and decorative lighting
7、 Conclusion
CXLE87207 provides a highly reliable and flexible driving solution for outdoor LED display and lighting systems with its nine channel high-voltage output, intelligent switching between external and internal control, high-precision dimming, and powerful cascading capability. Whether it is a performance scene that requires precise control or a landscape project that requires autonomous operation, this chip can achieve complex light effect control in a single-chip form, significantly reducing system complexity and maintenance costs.
JTMIC（jtm-ic.com） As the official technical partner of this chip, we provide one-stop services from sample application, design support to bulk supply. For detailed data manuals, design guidelines, or technical assistance, please visit our official website or contact our professional technical team.
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