TPS92070

www.ti.com TPS92070 SLUSAN1 – DRAFT 6 * AUGUST 30, 2011 High-Efficiency Integrated Dimming LED Lighting Controller Check for Samples: TPS92070 FEATURES 1 Advanced Integrated Dimming Interface Non-Dissipative TRIAC Dimmer Management Lamp-to-Lamp Uniformity During Dimming No Low-Frequency Photometric Ripple Exponential Dimming Profile Innovative Secondary-Side Feedback Eliminates Optocoupler Devices LED Current Regulation better than 5% Programmable Minimum LED Current Valley Switching and DCM Operation for Reduced EMI and Improved Efficiency Leading Edge Dimmer Detection Power Factor > 0.8 Cycle-by-Cycle Current Limit Protection Low Start-Up and Standby Currents Integrated PWM MOSFET Driver Thermal Shutdown 16-Pin, TSSOP package APPLICATIONS LED Light Bulb Replacement LED Luminaires LED Downlights LED Wall Washers DESCRIPTION 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 a...