TI 公司的TPS92010具有高效率的PWM控制器,采用准谐振模式以降低EMI和开关损耗,起动电流小于25uA,可编程线路和负载过压保护,并提供LED开路保护和超温保护,主要用在A19 E12/E26/27, GU10, MR16, PAR30/38集成灯,结构和显示照明以及走廊和顶灯照明.本文介绍了TPS9201主要特性,框图, 典型应用电路图以及230-VAC TRIAC调光6-W LED驱动器主要特性,电路图,材料清单和布局图.
The TPS92010 is a PWM controller with advanced energy features to provide high efficiency driving for LED lighting applications.
The TPS92010 incorporates frequency fold back and low power mode operation to reduce the operation frequency at light load and no load operations.
The TPS92010 is offered in the 8-pin SOIC (D) package. Operating junction temperature range is –40℃ to 105℃.
TPS9201主要特性:
LED Lighting Current Driver Controller with Energy Saving Features
Quasi-Resonant Mode Operation for Reduced EMI and Low Switching Losses (Low Voltage Switching)
Low Standby Current for Deep Dimming Efficiency Power Consumption
Low Startup Current: 25 µA Maximum
Programmable Line and Load Overvoltage Protection
Provides Open LED Protection
Internal Overtemperature Protection
Current Limit Protection
Cycle-by-Cycle Power Limit
Primary-Side Overcurrent Hiccup Restart Mode
1-A Sink TrueDrive, –0.75-A Source Gate Drive Output
Programmable Soft-Start
TPS9201应用:
Residential LED Lighting Drivers for A19 E12/E26/27, GU10, MR16, PAR30/38 Integral Lamps
Drivers for Wall Sconces, Pathway Lighting and Overhead Lighting
Drivers for Wall Washing, Architectural and Display Lighting
图1. TPS9201方框图
图2. TPS9201典型应用电路图
A 230-VAC TRIAC调光6-W LED驱动器
The TPS92010EVM-631 is a fully assembled and tested circuit for demonstrating the TPS92010 Controller in a 230VAC light bulb replacement design that is TRIAC dimmable. The TPS92010EVM-631 includes an LED light engine to load the output and make it easy to see the dimming function when used with an external TRIAC based dimmer.
TRIAC调光6-W LED驱动器主要特性:
LED Lighting Current Driver Controller with Energy Saving Features
Quasi-Resonant Mode Operation for Reduced EMI and Low Switching Losses (Low Voltage Switching)
Low Standby Current for Deep Dimming Efficiency Power Consumption
Low Startup Current: 25 µA Maximum
Programmable Line and Load Overvoltage Protection
Internal Overtemperature Protection
Current Limit Protection
1-A Sink TrueDrive, –0.75-A Source Gate Drive Output
Programmable Soft-Start
图3.PSU电路图
图4.LED板电路图
TRIAC调光6-W LED驱动器材料清单:
图5. PSU PCB布局图(顶层) |
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