LX1688IPW数据手册集成电路（IC）的照明镇流器控制器规格书PDF

描述 Description

Key Features:
• Provision to synchronize lamp current & frequency with other controllers
• Dimming with analog or digital (PWM) methods (>20:1)
• Programmable Fixed frequency
• Adjustable Power-up reset
• ENABLE/BRITE Polarity Selection
• Voltage limiting on step-up transformer secondary winding
• Open lamp timeout circuitry
• Switched VDD output (10mA)
• Micro-Amp Sleep Mode
• Operates with 3.3V to 5V Supply
• 100mA output drive capability Description: The LX1688 is a fixed frequency, dual current/voltage mode, switching regulator that provides the control function for Cold Cathode Fluorescent Lighting (CCFL). This controller can be used to drive a single lamp, but is specifically designed for multiple lamp LCD panels. The IC can be configured as a master or slave and synchronize up to 12 controllers. The LX1688 includes highly integrated universal ‘PWM or DC’ dim input that allows either a PWM or DC input to adjust brightness without requiring external conditioning, since a single external capacitor CPWM can be used to integrate a PWM input. Burst mode dimming is possible if the user supplies a low frequency PWM signal on the BRITE input and no CPWM capacitor is used. The controller utilizes Linfinity’s patented direct drive fixed frequency topology and patented resonant lamp strike generation technique Safety and reliability features include a dual feedback control loop that permits regulation of maximum lamp strike voltage as well as lamp current. Regulating maximum lamp voltage permits the designer to provide for ample worst-case lamp strike voltage while conservatively limiting maximum open circuit voltage. In addition the controller features include auto shutdown for an open or broken lamp, and a lamp fault detection with a status reporting output.To improve design flexibility the IC includes the ability to select the polarity of both the chip enable and dim (BRITE) inputs. Also included is a switched VDD output of up to 10mA that will allow the user to power other circuitry that can be switched on and off with the inverters enable input. This preserves the micro power sleep mode with no additional components.

简介

LX1688IPW属于集成电路（IC）的照明镇流器控制器。由制造生产的LX1688IPW照明，镇流器控制器此产品族中的产品可用于实现控制和调节功能。对于日光灯、电致发光灯和 HID 灯等非 LED 照明工具的正常工作，这些功能很有必要或十分有用。既定器件所具备的特定功能集因预期用途各异，并且所供应的产品可能包括相应资源以直接控制驱动负载的电源，也可能不包括这些资源。