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 Wysłany: Pon 22:03, 06 Gru 2010 Temat postu: moncler outlet The new LED driver _4007 |
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The new LED driver
, (# II set and backlight). LT3466-1 to 8 white LED backlighting for the LCD bias 15mA drivers and provide ± 15V output King No. 2006.3 paralyzed transportation power products t [link widoczny dla zalogowanych] eepw. com. cn a _ a ________¨ I_-I_ | 'I___ deletion World Field state design with integrated power MOSFET Figure 3, the LTC3783 drives provide power for the LED string 35 Shuai PW ■ LED boost applications ▲ Figure 4 chip LED-~ In the mobile phone, PDA and other handheld devices have small multi-drive LT3477 matrix TFT-LCD source,[link widoczny dla zalogowanych], usually a need to l0 4 a white topology DC / DC conversion. And the use of LED backlighting provides ± 15V for the LCD bias power. To achieve a single inductor clamor down a Figure 2 shows the LT3466-1 Tan-ion power supply from a single booster circuit drive 8 LED (15mA) and produce 15V output, a separate charge pump to generate a 15V output. This is a high-efficiency lithium ion battery-powered full TFT-LCD power supply (bias and backlight). A re-t, ltww juveniles. . ~ Apw. oorn. cn ... steam ~ IVILED drive dashboard backlighting,[link widoczny dla zalogowanych], interior lighting and brake lighting, the use of high-brightness (HB) LED. Need from the car battery-powered LED DC / DC converter to accurately adjust the current to ensure uniform brightness, color integrity,[link widoczny dla zalogowanych], and LED protection. According to headlights, taillights and interior lights used in reading lamps LED, power requirements stipulated for DC / DC regulator should be the best. Is worth noting that a problem is small in, the load voltage is equal to or make a big battery voltage is 1 or more LED strings supply. Another concern of a foot in large dimming ratio to effectively adjust brightness LED. Linear two automotive companies LTC3783 and LT3477 LED driver with the necessary high-brightness LED circuit, and can protect the LED. Both LED drivers into the town to configure the types of child DC / DC circuit extension J / l '(buck, boost, and the drop of a boost converter). They are suitable for different voltage conversion should be editor of lI 1l Han Ru-wide VMoth water use, to meet the auto car or truck exterior lighting power M0sEEr ~ special needs. Rate of successful LTC. 3 for the wisdom of its integrated dimmer can switch external NPWM input. Defects with flat bow out off dimmer channel MOSFET high-power MOSFET drivers into the sac drive to the strict adjustment of high output voltage and high output current (Figure 3). It is configured for serial or parallel form of LED lighting strings, such as car headlights. Car battery voltage depends on the temperature, work status, duration, and battery level asked. LED LED string with the increase in the number, the total LED voltage is very easy to achieve the minimum and maximum battery voltage range. Therefore, LED driver must be a variable voltage battery in the car not only to provide a constant current, and must also provide a constant voltage. LED driver must be able to automatically perform boost and buck DC / DC conversion, and must be asked in the implementation of these models seamless transition. LT3477 monolithic LED driver can use only a single inductor to provide a simple step-down circuit (Figure 4) LT3477 has a high-current sensing mode, in this mode, the load current to return to the V to provide greater than or Ding input voltage of the load voltage (VOUT \This configuration allows the input and output voltage is fully overlap. LT3477 LED chip and the LED drive LED drive controller protection from excessive electrical and thermal state. They have over-voltage and over current protection. Soft-start performance (with a small capacitor can be adjusted) to protect the input power from the current start of the invasion. They work with the current mode to achieve the line and load regulation, and even presented in a large voltage change the situation in the automotive power bus can do. In the over-voltage, over current or over-temperature case,[link widoczny dla zalogowanych], you must reduce the overheating incident LED LED current. Changes in simple circuits, LED drive enclosure with a thermistor near the LED connection, monitoring temperature. If the LED case of the ambient temperature close to dangerous levels,[link widoczny dla zalogowanych], the LED drive will reduce the load current to reduce the heat and protect the LED in the LED from overheating and permanent damage. Crab (ice) Search LED driver. Electronic Products Web site, 53 related articles Financial Secretary Sister Whip Ju 1111111 ~ one thousand one hundred and eleven of a careless one _ Mindanao, a ___ ■ __. __ _ One by one
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