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产品型号 | ME2206A | 品牌 | MICRONE | 封装 | SOT23-6 | 价格 | 电询 | 描述 | 3W大功率白光LED驱动芯片 | 查看资料 | ME2206A | |
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产品说明
ME2206 是一款PWM 控制模式的开关型DC/DC 升压恒流芯片。用来驱动3W 大功率白光LED,LED 电流可通过调节外部电阻恒定在500mA~1A,且95mV 的反馈电压可减小外部电阻的功率损耗。ME2206 具有1000KHz 的固定开关频率,因此外围器件可使用低值电感和陶瓷电容。
ME2206产品的特点: 高效率:90% LED 恒流精度:±10% 低启动电压:0.9V(ILED=270mA) 低保持电压:0.75V(ILED=200mA) 开关频率:1000KHz(TYP.) 仅需电容、电感、肖特基二极管、电阻等少量外部元器件 低导通电阻:100mO(TYP.) 开路LED 保护 过温保护
ME2206产品的封装形式:SOT-23-6 可提供无铅封装。
ME2206的典型应用: 给大功率LED 提供能源恒流源
ME2206使用注意事项: ME2206 只适用于两节干电池驱动1W 或3W 的白光LED,ME2206A 一节干电池即可驱动1W 或3W 的白光LED。
ME2206参数应用:3W High Power White LED The ME2206 is a set-up DC-DC converter that delivers a regulated output current. The device switches at a 1MHz constant frequency,allowing for the use of small value external inductor and ceramic capacitors. The ME2206 is targeted to be used for driving loads up to 1A from a two-cell alkaline battery. The LED current can be programmed by the external current sense resistor, Rs, connected between the feedback pin (FB) and ground. A low 95mV feedback voltage reduces the power loss in the Rs for better efficiency. During the shutdown mode, the feedback resistor Rs and the load are completely disconnected and the current consumption is reduced to less than 1uA.
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