LED照明驱动器 High Efficiency Boost for White LED's and/or OLED Displays with Dual Current Sinks 10-WSON -40 to 85
The LM3509 current mode boost converter offers two separate outputs. The first output MAIN is a constant current sink for driving series white ’s. The second output SUB/FB is configurable as a constant current sink for series white LED bias, or as a feedback pin to set a constant output voltage for powering OLED panels.
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When configured as a dual output white LED bias supply, the LM3509 adaptively regulates the supply voltage of the LED strings to maximize efficiency and insure the current sinks remain in regulation. The maximum current per output is set via a single external low power resistor. An I2C compatible interface allows for independent adjustment of the LED current in either output from 0 to max current in 32 exponential steps. When configured as a white LED + OLED bias supply the LM3509 can independently and simultaneously drive a string of up to 5 white LED’s and deliver a constant output voltage of up to 21V for OLED panels.
Output over-voltage protection shuts down the device if VOUT rises above 21V allowing for the use of small sized low voltage output capacitors. The LM3509 is offered in a small 10-pin thermally- enhanced WSON package and operates over the -40°C to +85°C temperature range.
频率 1.27 MHz
输出接口数 2
输入电压DC 2.70V ~ 5.50V
输出电压 21 V
输出电流 30 mA
供电电流 440 µA
静态电流 900 µA
调节输出数 2
开关频率 1.27 MHz
过温保护 Yes
拓扑结构 Boost
输入电压Max 5.5 V
输入电压Min 2.7 V
工作温度Max 85 ℃
工作温度Min -40 ℃
输入电压 2.7V ~ 5.5V
安装方式 Surface Mount
引脚数 10
封装 WSON-10
长度 3 mm
宽度 3 mm
高度 0.8 mm
封装 WSON-10
工作温度 -40℃ ~ 85℃ TA
产品生命周期 Active
包装方式 Tape & Reel TR
制造应用 背光
RoHS标准 RoHS Compliant
含铅标准 Lead Free
REACH SVHC版本 2015/06/15
型号/品牌 | 代替类型 | 替代型号对比 |
---|---|---|
LM3509SDE/NOPB TI 德州仪器 | 当前型号 | 当前型号 |
LM3509SD/NOPB 德州仪器 | 完全替代 | LM3509SDE/NOPB和LM3509SD/NOPB的区别 |
LM3509SDX/NOPB 德州仪器 | 类似代替 | LM3509SDE/NOPB和LM3509SDX/NOPB的区别 |