TI TPS92070低功耗离线LED照明解决方案

TI公司的TPS92070是用在低功耗离线LED照明的高档PWM控制器,集成的调光接口具有非消耗调光触发控制电路.LED电流调整优于5%,可编程最低LED电流,谷底开关和DCM操作降低EMI和提高了效率,功率因素大于0.8,逐个周期的限流保护,主要用在LED灯,LED光源,LED聚光灯和LED投光灯.本文介绍了TPS92070主要特性,方框图, 应用电路图以及230VAC输入TPS92070EVM-648调光LED照明驱动器主要指标,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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