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Typical application circuit of audio synchronous color lamp

2016-08-07 00:31  
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Typical application circuit of audio synchronous color lamp control integrated circuit 5G052
The sequence of 5G052 four-way output is A, B, C, D, the lowest work voltage VDD is 5V, but when the VDD declines, LED fluorescence change rate will rise, compared to power supply, the oscillation frequency fosc is unstable. In figure, the range of oscillation frequency is decided by C1, that is the variation range of fluorescence rate. If C1 increases, the parallel connecting resistance on C1 will improve the rate. C2 is power decoupling capacitor. R1 is LED current resistance. R2 is power supply current limiting.