适用于笔记本电脑的六通道高效 LED 背光驱动器,具有灵活的外部/内部 FET 控制 24-WQFN -30 to 85
The LP8545 is a white driver with integrated boost converter. It has six adjustable current sinks which can be controlled by PWM input or with I2C-compatible serial interface.
The boost converter has adaptive output voltage control based on the LED driver voltages. This feature minimizes the power consumption by adjusting the voltage to lowest sufficient level in all conditions.
LED outputs have 8-bit current resolution and up to 13-bit PWM resolution with additional 1-3 bit dithering to achieve smooth and precise brightness control. Proprietary Phase Shift PWM control is used for LED outputs to reduce peak current from the boost converter, thus making the boost capacitors smaller. The Phase Shifting scheme also eliminates audible noise.
Internal EEPROM is used for storing the configuration data. This makes it possible to have minimum external component count and make the solution very small.
LP8545 has safety features which make it possible to detect LED outputs with open or short fault. As well low input voltage and boost over-current conditions are monitored and chip is turned off in case of these events. Thermal de-rating function prevents overheating of the device by reducing backlight brightness when set temperature has been reached.
LP8545 is available in s WQFN 24-pin package.
频率 156kHz, 312kHz, 625kHz, 1250kHz
输出接口数 6
输出电压 40 V
静态电流 4.00 mA
过温保护 Yes
拓扑结构 Boost
工作温度Max 85 ℃
工作温度Min -30 ℃
电源电压 2.7V ~ 22V
安装方式 Surface Mount
引脚数 24
封装 WFQFN-24
封装 WFQFN-24
工作温度 -30℃ ~ 85℃ TA
产品生命周期 Active
包装方式 Tape & Reel TR
RoHS标准 RoHS Compliant
含铅标准 Lead Free
ECCN代码 EAR99
型号/品牌 | 代替类型 | 替代型号对比 |
---|---|---|
LP8545SQE/NOPB TI 德州仪器 | 当前型号 | 当前型号 |
LP8545SQX/NOPB 德州仪器 | 类似代替 | LP8545SQE/NOPB和LP8545SQX/NOPB的区别 |
LP8545SQ/NOPB 德州仪器 | 类似代替 | LP8545SQE/NOPB和LP8545SQ/NOPB的区别 |