UCC3974 - 双路冷阴极荧光灯控制器

UCC3974是TI德州仪器公司的一款CCFL背光控制器产品，UCC3974是双路冷阴极荧光灯控制器，本站介绍了UCC3974的封装应用图解、特点和优点、功能等，并给出了与UCC3974相关的TI元器件型号供参考。

UCC3974 - 双路冷阴极荧光灯控制器 - CCFL背光控制器 - 电源管理特殊功能 - 德州仪器

产品描述

Design goals for a cold cathode fluorescent lamp (CCFL) converter used for a liquid crystal display (LCD) monitor application include small size, high efficiency, and low cost. The UCC2974/UCC3974 CCFL controllers provide the necessary circuit blocks to implement a highly efficient LCD monitor backlight supply in a small 16-pin TSSOP package. The device features two control stages for operating independent resonant tanks for multi-lamp designs. The BiCMOS controller typically consumes less than 2-mA of operating current, improving overall system efficiency. External parts count is minimized and system cost is reduced by integrating such features as dual PWM driver stages, open lamp protection, overvoltage clamp, and synchronization circuitry between the buck and push-pull stages. The device operates in both analog and low-frequency dimming modes.

产品特性

Synchronous or Nonsynchronous Operation
Dual Output and Control Stages
BiCMOS Technology
Accurate Current Control with 2-mA Typical Supply Current
Analog or Digital Low-Frequency Dimming Capability
Open Lamp Protection with Voltage Clamp
4.5-V to 25-V Operation
PWM Frequencies Synchronized to External Resonant Tanks
TSSOP-16 (PW) Package
APPLICATIONS
- Portable PCs
- Desktop LCD Monitors
- Internet Appliances

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