TI 公司的TPS92210 是功率因素控制器(PFC) LED照明驱动控制器,它的PWM调制算法可随开关频率和初级电流而变,同时保持不连续或瞬态模式工作,具有高的效率和低的EMI,开路LED检测等.主要用在TRIAC可调光LED照明设计,住宅区LED照明和道路照明等.本文介绍了TPS92210主要特性,功能方框图,典型应用电路以及TPS92210EVM-613评估板主要性能和指标,电路图和材料清单(BOM).

The TPS92210 is a natural power factor correction (PFC) light emmitting diode (LED) lighting driver controller with advanced energy features to provide high efficiency control for LED lighting applications.

A PWM modulation algorithm varies both the switching frequency and primary current while maintaining discontinuous or transition mode operation in all regions of operation. The TPS92210 cascode architecture enables low switching loss in the primary side and when combined with the discontinuous conduction mode (DCM) operation ensures that there is no reverse recovery loss in the output rectifier. These innovations result in efficiency, reliability or system cost improvements over a conventional flyback architecture.

TPS92210主要特性:

Flexible Operation Modes

Constant On-Time Enables Single Stage PFC Implementation

Peak Primary Current

Cascoded MOSFET Configuration

Fully Integrated Current Control Without Sense Resistor

Fast and Easy Startup

Discontinuous Conduction Mode or Transition Mode Operation

Transformer Zero Energy Detection

Enables Valley Switching Operation

Helps to Achieve High Efficiency and Low EMI

Open LED Detection

Advanced Overcurrent Protection

Output Overvoltage Protection

Line Surge Ruggedness

Internal Over-Temperature Protection

8-Pin SOIC (D) Package

TPS92210应用:

TRIAC Dimmable LED Lighting Designs

Residential LED Lighting Drivers for Retrofit A19 (E27/26, E14), PAR30/38, GU10, MR16, BR

Drivers for Down and Architectural Wall Sconces, Pathway and Overhead Lighting

图1.TPS92210功能方框图

图2.TPS92210典型应用电路图

TPS92210EVM-613评估板

The TPS92210EVM-613 uses the TPS92210 in a Discontinuous Conduction Mode (DCM) flyback topology. The controller uses cascode configuration which allows for faster start-up times as well as eliminates the need for an external sense resistor for primary-side current sense. Additionally, the controller employs a max on-time modulation scheme that allows it to be used in a Power Factor Correction (PFC) circuit. This results in a compact LED driver design that achieves greater than 0.95 power factor (PF) driven by a single controller.

The TPS92210EVM-613 is also compatible with a wide variety of TRIAC dimmers. Secondary-side feedback responds to the conduction time of the sinusoidal wave, as governed by the TRIAC, and appropriately lowers the LED current to dim the LEDs. The secondary side also includes an adaptive supplemental load that sinks current when LED current becomes too low, therefore ensuring conduction of the TRIAC during very low dimming.

TPS92210EVM-613评估板应用:

• Commercial/Household LED Lighting

TPS92210EVM-613评估板主要特性:

• Single Stage Power Factor Correction Achieves PF Greater than 0.95

• TRIAC Dimming to Zero LED Current

• Test Points for Output Voltage/Current

• Cascoded Configuration for Fully Integrated Current Control with No External Sense Resistor

TPS92210EVM-613评估板电性能和指标:


图3.TPS92210EVM-613评估板电路图

TPS92210EVM-613评估板材料清单(BOM):


详情请见:
http://focus.ti.com/lit/ds/symlink/tps92210.pdf
和
http://focus.ti.com/lit/ug/sluu436a/sluu436a.pdf