产品概述 返回TOPai7嘉泰姆

The CXLE81111 is an integrated HB-LED backlight driver that controls 4 channels of LED current for LCD backlight applications such as LCD TV and LCD monitor. The CXLE81111 is capable for driving 20mA to 150mA white LEDs. The CXLE81111’s 4 channels of voltage controlled current sinks with 2% current matching compensate for the non-uniformity effect of forward voltage variance in the LED stacks. To minimize the voltage headroom and power loss in the typical multi-strings operation, the CXLE81111 monitors the total highest LED forward voltage string and uses its feedback signal for output regulation. A SETI pin is used for programming maximum LED current. A high contrast ratio true PWM dimming can be achieved by driving DIM pin with a PWM signal. LED current is proportional to the DIM pin duty. The CXLE81111 features extensive protection functions that include OLP, SLP, OCP, OVP and OTP. It is available in a TSSOP-20 (FD) package.

   产品特点 返回TOPai7嘉泰姆

„ 4 Channels ai7嘉泰姆

„ Drive 20mA to 150mA Each Channel ai7嘉泰姆

„ 100Hz to 25kHz Dimming Frequency ai7嘉泰姆

„ Current Mode Boost Controller ai7嘉泰姆

„ 10V to 30V Input Supply ai7嘉泰姆

„ 50kHz to 2MHz Programmable Switching Frequency ai7嘉泰姆

„ External Switching Frequency Synchronization ai7嘉泰姆

„ Current Matching 2% ai7嘉泰姆

„ Highest Vf String Detection for Regulation ai7嘉泰姆

„ Protections: ai7嘉泰姆

Š Open LED Protection (OLP) ai7嘉泰姆

Š Short LED Protection (SLP) ai7嘉泰姆

Š Switch Over Current Protection (OCP) ai7嘉泰姆

Š Output Over Voltage Protection (OVP) ai7嘉泰姆

Š Over Temperature Protection (OTP) ai7嘉泰姆

„ TSSOP-20 (FD) Package ai7嘉泰姆

„ RoHS Compliantai7嘉泰姆

   应用范围 返回TOPai7嘉泰姆

„ LCD TV LED Backlighting ai7嘉泰姆

„ LCD Monitor LED Backlightingai7嘉泰姆

   技术规格书（产品PDF) 返回TOP ai7嘉泰姆

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