Variable voltage DC Power Supply support master-slave configuration to increase the output capacity to 576kW. SYS series cabinets use world famous circuit breaker to control the input of each power module inside. After power on, the specified 3U or 6U height power supply will be configured as a Master to control all of the slave units. CSP is the Master in SYSA series cabinets, which is equipped with a PDU (Power Distribution Unit) and a CSP (Control & Supervisory Panel).
Connecting the cabinet
1. The cabinets can be connected in parallel in order to increase output power.
â— Maximum 16 units 3U height same model DC power supplies or 6U height same model DC power supplies can be connected via the bus.
â— 16 units each with a power of 18kW are connected together to a 288kW system.
â— 16 units each with a power of 36kW are connected together to a 576kW system.
2. Different height cabinets can be connected in parallel.
â— Use parallel bars to simplify the connection between multiple rack cabinets.
â— Realized the gapless connection between multiple rack cabinets.
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Enhanced LED Driver Solution: Fully Configurable Smart 16 LED Light Source Driver
LED1642GW is ST's next-generation LED array driver, offering a range of fully configurable and innovative features while maintaining the original 24-pin standard package. It only requires an external resistor for practical applications, significantly reducing component costs and enhancing system design flexibility.
This new driver provides users with multiple configuration options, including local dimming, global current regulation, adjustable switching time, inter-channel sequential delay, advanced LED fault detection, automatic energy-saving technology, and serial data and clock resynchronization. These features make system design more adaptable and efficient.
Designed to meet noise reduction requirements, the LED1642GW allows users to set the output channel switching speed via a serial interface. With four available speeds and an on-time setting range of 30nS to 270nS, it helps reduce EMI interference and improve voltage stability. When the output is off, the module automatically wakes up upon receiving the first conduction command, enabling the energy-saving function to turn off the driver automatically.
*Figure 1 – Main application example of LED1642GW*
In today’s world, LEDs have become an essential part of daily life, found in mobile devices, signage, LCD TV backlights, lighting systems, and automotive applications. As LED prices drop and energy efficiency improves, manufacturers are rethinking their product designs. Each application requires a tailored LED driver solution.
In a mature market, suppliers must continuously optimize performance, reliability, and cost. For high-performance projects, achieving differentiation through smart innovation is key. The LED1642GW delivers this by integrating numerous advanced features into a standard package, providing excellent value and performance.
The LED1642GW is a low-voltage, low-power 16-bit monolithic shift register designed for LED and display panels. It supports a 20V output and drives multiple LEDs in series. With 16 regulated power supplies, it offers a constant current output ranging from 3mA to 36mA. Users can adjust the current using an external resistor and two 7-bit gain registers, while a 12/16-bit gray scale controller adjusts brightness.
It also allows for four different switching time settings to help reduce system noise. Additional features include open/short fault detection, auto-shutdown, thermal management, and a high-speed serial interface (up to 30 MHz). An optional gradual output delay reduces inrush current, especially in daisy-chain configurations.
*Figure 2 – Internal Gain Adjustment*
The LED1642GW includes error detection, allowing users to monitor and identify faults in LEDs or displays. Its automatic power-off and wake-up feature minimizes power consumption when all channels are off, making it ideal for large-screen displays.
Users can also configure the switching time (tON/tOFF) to optimize EMI performance during PWM operation. The SDO delay feature helps synchronize data and clock signals in daisy-chain setups, improving signal integrity.
*Figure 3 – SDO Synchronization*
Gradual output delay ensures that channels turn on sequentially, reducing inrush current and EMI. This feature is particularly useful in high-power LED arrays.
PWM control allows for precise brightness adjustment using a 12/16-bit grayscale. The counter clock source is provided by the PWCLK pin, enabling flexible and accurate control over LED brightness.
The temperature monitoring function alerts users when the internal temperature exceeds 150°C, and automatically shuts down the driver if it reaches 170°C to prevent damage. However, the digital interface remains active for communication and diagnostics.
*Figure 5 – PWM Signal Generation*
The STEVAL-ILL061V1 evaluation board demonstrates the capabilities of the LED1642GW. It features a high-brightness RGB LED array with local dimming, diagnostics, and color temperature control. The board uses an STM32 microcontroller and SPI interface, powered by the ST L7981 DC/DC converter.
A graphical user interface (GUI) enables users to control all functions and customize patterns, making development and testing more intuitive.
*Figure 6 – STEVAL-ILL061V1 Evaluation Board*
*Figure 7 – LED1642GW PC GUI (Advanced Mode)*
*Figure 8 – LED1642GW PC GUI (Pattern Settings)*
In conclusion, the LED1642GW is a flexible and intelligent LED array driver, ideal for various applications. With its advanced features and comprehensive evaluation kit, it empowers users to develop enhanced LED driver solutions quickly and efficiently.