Maxim's MAX16807? CMAX16810* family is a multi-channel, linear constant current LED driver with integrated switch-mode voltage controller. These devices are the first fully integrated high-brightness LED drivers to meet the industry's requirements for high-contrast mercury-free display luminaires and provide accurate and matched constant current control for multiple columns of parallel LEDs to meet automotive and other high performance requirements. The need for LCD displays such as notebook/desktop displays, LCD TVs, and industrial LCD panels. These LED drivers are manufactured in an environmentally friendly, lead-free process and have the industry's smallest package size. The MAX16807?CMAX16810 features a current mode PWM controller. These LED drivers provide 8 to 16 open-drain, sink current source outputs that can be programmed through resistors up to 55mA and rated continuous operation at 36V. By using an external MOSFT, the internal PWM controller can deliver up to 1A of load current at 40V maximum output voltage with extremely high efficiency (up to 92% overall efficiency). The MAX16807/MAX16808* operate in stand-alone mode and can be controlled by a microcontroller via an industry-standard 4-wire 25Mbps interface. A dedicated brightness input quickly turns all LED channels on or off for up to 5000:1 brightness adjustment. The driver's wide frequency range (25kHz to 1MHz) optimizes the design by tradeoffs in efficiency, size (inductance, capacitance) and minimum EMI. The transition to LED brings advantages and challenges. Government agencies are banned from using mercury sources (fluorescent and CCFL lamps), forcing the automotive industry to use white LEDs as backlights to replace existing CCFL-based display systems. ,entertainment). Backlight solutions using white LEDs and RGB LEDs have emerged in high performance LCD displays such as notebooks and desktop displays. In these high-performance displays and building and automotive lighting applications, the use of LEDs as a light source has its unique advantages. This includes: minimum form factor, fast transient performance, precise brightness control, accurate and rich color adjustment, and environmentally friendly (lead-free) and energy efficient process technology. Unique LED Driver Design 1. No need for external control. The new MAX16807? CMAX16810 series drivers do not require additional ICs and power devices, but integrate an internal switch mode controller, multi-channel constant current LED driver with high voltage MOSFET tuning components and interfaces. Circuit. 2. Reduce the cost of the entire solution and mass production. High integration. In addition to saving space, the MAX16807? CMAX16810 also helps simplify design and reduce manufacturing costs. Each of these LED drivers can use the same current setting resistor. This resistor ensures the current accuracy of the LED and accurate chromaticity matching by using a common bandgap reference. In this way, higher performance metrics can be achieved, production time can be reduced, and costs can be reduced. 3. Drives for a wide range of applications Flexible topology, high integration, combined with the industry's smallest package, make the IC suitable for all LCD display products from 3.5 inches to 50 inches. Typical applications include automotive displays, notebook/desktop monitors, and LCD TV backlight units (BLUs). The higher rated output voltage allows for the largest number of white, red, green or blue LEDs in series per column. This multi-parallel and multi-string structure is very attractive in architectural, automotive decorative lighting and ambient lighting applications. Key Drive Features The MAX16807® CMAX16810 combines independent constant current control and precision bandgap reference for each channel to achieve high-accuracy channel-to-channel matching. By operating the integrated switch mode controller in a boost or single-ended main inductor buck-boost (SEPIC) converter mode, the wide input voltage range can be stabilized to a continuous 36V (40V absolute maximum) LED voltage. The device can be used directly from a bias voltage of 8V to 26.5V or with a simple external biasing device to use a higher voltage. Other drive features include: Output enable pin for PWM dimming (up to 30kHz) Dimming ratio up to 5000:1 Output current can be programmed by resistor (3.6mA to 55mA per channel) Current matching accuracy of 3% at all outputs Oscillator frequency adjustable from 25kHz to 1MHz for switch mode pre-assertor LED open-circuit detection (MAX16808, MAX16810) Individually open/close output channel overtemperature protection via serial bus
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Copper Filter Drier,Refrigerant Liquid Receiver,Refrigerant Heat Exchanger
Maidi Heating And Refrigerating Equipment Co., Ltd. , http://www.lydccompressor.com