RT8458 PWM Buck LED驱动器应用电路 - 模拟电源 -

The RT8458 is a PWM controller with an integrated high side floating gate driver. It is used for step down converters by well controlling the external MOSFET and regulating a constant output current.

The output duty cycle of the RT8458 can be up to 100% for wider input voltage application, such as E27 and PAR30 off-line LED lighting products.
 

Features
Low Cost and Efficient Buck Converter Solution
Universal Input Voltage Range with Off-Line Topology
Programmable Constant LED Current
Dimmable LED Current by ACTL
Output LED String Open Protection
Output LED String Short Protection
Output LED String Over Current Protection
Built-in Thermal Protection
TSOT-23-6 Package
RoHS Compliant and Halogen Free
 

Application
E27, PAR30, Offline LED Lights

Pin Configurations

TSOT-23-6
 
Typical Applications Circuit

Figure 1. For Typical Application

 Figure 2. For High PF Application

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