TPS92561DGN

TPS92561 器件是一款升压控制器，用于采用高压、低电流LED 的LED 照明应用。在照明应用使用升压转换器的方法可生产出体积尽可能小的转换器，并且可实现 90% 以上的高效率。此器件包含一个具有固定偏移的电流感测比较器，从而实现简单滞后控制机制，此机制没有那些通常与升压转换器相关的环路补偿问题。集成过压保护(OVP) 和VCC 稳压器进一步简化了设计过程，并且减少了外部组件数量。 The TPS92561 device is a boost controller for phase cut dimmer compatible LED lighting applications. The device incorporates a current sense comparator with a fixed offset, allowing the construction of a hysteretic, offline converter suitable for driving LEDs in a wide variety of applications. The inductor peak-to-peak current ripple follows the device reference, the ADJ pin voltage (V_ADJ), and is bounded by the SEN pin hysteresis (V_SEN - HYS). By using a voltage divider from the rectified AC voltage, the inductor current can be made to follow the line closely and create conversions which result in high power factor and low THD. Boost converters also have an advantage when TRIAC dimming because of their inherent ability to draw continuous current from the line. This eliminates the need for additional hold current circuitry as the converter itself can draw power until the zero crossing point is reached. The continuous input current of a boost also reduces the input EMI filter requirements.

• 简单滞后控制
• 紧凑解决方案和简单物料清单
• 自然可调光三端双向可控硅(TRIAC) 和反相位调光器
• 执行LED 驱动电路，此电路效率大于 90%，功率因数大于0.9，并且总谐波失真(THD) 小于 20%
• 可编程输出过压保护
• 过热关断
• VCC 欠压闭锁
• 带外露焊盘的8 引脚超薄型小外形尺寸(VSSOP)（表面贴装小外形尺寸(MSOP)）封装

• 离线TRIAC 可调光应用
• 离线不可调光灯
• 要求高效和尽可能低的物料清单(BOM) 成本的灯
• 工业用和商用固态照明