LED7706点击型号即可查看芯片规格书
芯片规格书搜索工具-icspec
产品概述
描述
The LED7706 consists of a high efficiency monolithic boost converter and six controlled current generators (rows) specifically designed to supply LEDs arrays used in the backlighting of LCD panels. The device can manage an output voltage up to 36 V (i.e. 10 white LEDs per row).
The generators can be externally programmed to sink up to 30 mA and can be dimmed via a PWM signal (1 % dimming duty-cycle at 20 kHz can be managed). The device allows to detect and manage the open and shorted LED faults and to let unused rows floating. Basic protections (output over-voltage, internal MOSFET over-current and thermal shutdown) are provided.
所有功能
- Boost section4.5 V to 36 V input voltage rangeInternal power MOSFETInternal +5 V LDO for device supplyUp to 36 V output voltageConstant frequency peak current-mode control250 kHz to 1 MHz adjustable switching frequencyExternal synchronization for multi-device applicationPulse-skip power saving mode at light loadProgrammable soft-startProgrammable OVP protectionStable with ceramic output capacitorsThermal shutdown
- Backlight driver sectionSix rows with 30 mA maximum current capability (adjustable)Rows disable optionLess than 500 ns minimum dimming ontime (1 % minimum dimming duty-cycle at 20 kHz)±2 % current matching between rowsLED failure (open and short-circuit) detection
