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TI产品 - UC2871介绍
UC2871 - 谐振荧光灯驱动器

UC2871是TI公司的一款CCFL背光控制器产品,UC2871是谐振荧光灯驱动器,本页介绍了UC2871的产品说明、应用、特性等,并给出了与UC2871相关的TI元器件型号供参考。

UC2871 - 谐振荧光灯驱动器 - CCFL背光控制器 - 电源管理特殊功能 - TI公司(Texas Instruments,德州仪器)

产品描述

The UC1871 Family of IC’s is optimized for highly efficient fluorescent lamp control. An additional PWM controller is integrated on the IC for applications requiring an additional supply, as in LCD displays. When disabled the IC draws only 1µA, providing a true disconnect feature, which is optimum for battery powered systems. The switching frequency of all outputs are synchronized to the resonant frequency of the external passive network, which provides Zero Voltage Switching on the Push-Pull drivers.

Soft-Start and open lamp detect circuitry have been incorporated to minimize component stress. An open lamp is detected on the completion of a soft-start cycle.

The Buck controller is optimized for smooth duty cycle control to 100%, while the flyback control ensures a maximum duty cycle of 95%.

Other features include a precision 1% reference, under voltage lockout, flyback current limit, and accurate minimum and maximum frequency control.

产品特性

  • 1µA ICC when Disabled
  • PWM Control for LCD Supply
  • Zero Voltage Switched (ZVS) on Push-Pull Drivers
  • Open Lamp Detect Circuitry
  • 4.5V to 20V Operation
  • Non-saturating Transformer Topology
  • Smooth 100% Duty Cycle on Buck PWM and 0% to 95% on Flyback PWM

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