TI TPS92070低功率离线LED照明解决方案

TI 公司的TPS92070是用于低功率离线LED照明的先进的PWM控制器，具有先进的调光接口，提供无损耗调光触发控制电路。没有低频光照度波动，LED电流调整度优于5%，并可编最小LED电流，功率因素大于0.8。TPS92070集成了PWM MOSFET驱动器和热关断电路，主要用在LED照明灯，LED灯光源，LED聚光灯和LED投光灯。本文介绍了TPS92070主要特性，功能方框图，应用框图以及TPS92070EVM-648评估板主要特性，电路图和材料清单。

The TPS92070 is an advanced PWM controller ideal for use in low-power, offline, LED lighting applications. The integrated dimming interface circuit of the TPS92070 features a non‐dissipative dimmer trigger control circuit. The TPS92070 controller provides DC LED current with no photometric ripple effects. The DC current also results in higher efficacy of the LEDs. The TPS92070 provides exponentially controlled light output based on the external dimmer position. High power factor is achieved with a valley fill circuit. Once a leading-edge dimmer is detected, the TPS92070 sets an output to disable the PFC circuit and thus optimizes driver operation. The LED current sense precision error amplifier implements deep dimming.

TPS92070主要特性：

Advanced Integrated Dimming Interface

Non-Dissipative TRIAC Dimmer Management

Lamp-to-Lamp Uniformity During Dimming

No Low-Frequency Photometric Ripple
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