今天小编要和大家分享的是LED驱动器相关信息，接下来我将从RT8453/RT8453B应用电路（40V的高电压降压型L，12*3w/36w面板灯电源,led恒流电源,led驱动器这几个方面来介绍。
LED驱动器相关技术文章RT8453/RT8453B应用电路（40V的高电压降压型L
RT8453/RT8453B应用电路（40V的高电压降压型LED驱动器）
The RT8453B is a buck current mode PWM regulator for LED driving applications. It provides an integrated 1.5A switch and can be operated with a wide input voltage range from 4.5V to 40V. With a 500kHz operating frequency, the RT8453B allows all external inductor and input/output capacitors to be small. High efficiency is achieved with its 190mV current sensing capability. Dimming can be either analog or PWM digital signal driven. The RT8453B is available in a small SOP-8 (Exposed pad) package. 更多详细介绍：http://www.elecfans.com/soft/39/2010/2010093090875.html |
| Ordering Info |
 Note :Richtek Green products are :► RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020.► Suitable for use in SnPb or Pb-free soldering processes. |
| Features |
| • Input Operating Range 4.5 to 40V• 1.5A Switching Current Limitation• 10% Constant Current Output Accuracy• Current Mode PWM with 500kHz Switching Frequency• Analog or PWM Control Signal for LED Dimming• Programmable Soft Start• Input Under Voltage Lockout• Over Temperature Protection• RoHS Compliant and Halogen Free |
| Application |
| • General Illumination• Desk Lights and Room Lighting• Industrial Backlight/Lighting• Constant Current Source |
| Pin Configurations |
( VIEW)
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SOP-8 (Exposed Pad)| Typical Applications Circuit |
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