cy8cledac02主要特性:

■ ac offline input range from 80 to 277
图1。cy8cledac02逻辑方框图

图2。cy8cledac02简化应用电路图


图3。cy8cledac02典型应用电路图

采用cy8cledac02的17w调光led驱动器参考设计

highline 17 w dimmable led driver using cy8cledac02 reference design guide

this document describes a 17w dimmable led driver reference design using the cy8cledac02 ac-dc power controller device. this reference design is capable of driving eight white leds (typical load voltage of 25 v) at 530 ma.

the cy8cledac02 is a high performance offline led driver, designed to interface directly with most conventional phase cut based wall dimmers. the device uses proprietary digital control technology to provide automatic detection of dimmer type (leading or trailing edge). it automatically generates dimming signals for led loads and has the ability to dim down to 2%.

参考设计系统指标:



图4.17w调光led驱动器参考设计外形图

图5.17w调光led驱动器参考设计电路图
17w调光led驱动器参考设计材料清单(bom):




变压器指标:

the transformer is one of the most important components in this led driver circuit. as explained in previous sections, in addition to the two standard windings, typical flyback converter transformers incorporate a third winding. in this circuit, it is used to provide voltage sensing for output voltage regulation and no-load protection by the cy8cledac02 device. this winding, called the bias or auxiliary winding, also provides supply voltage (vcc) to the cy8cledac02.

the specifications of the transformer for this reference design are as follows:

electrical specifications

primary inductance = 1200 μh at 10 khz

primary leakage inductance ≤ 20 μh at 10 khz

materials

core: ef2011 (ferrite material tdk pc40 or equivalent)

bobbin: ef2011

magnet wires: type 2uew

layer insulation tape: 3m1298 or equivalent