东芝 TA8276HQ 功放音效芯片技术资料(7)

汽车音响内置音效IC TA8276HQ 歌乐机头OEM芯片电路图技术资料

TA8276HQ6.Output Clip Detection Function (pin 25)The output clip detection terminal of pin 25 has the open collector output structure on chip as shown in Figure 11. In case that the output waveform is clipping, the clip detection circuit is operated and NPN Tr. is turned on. It is possible to improve the audio quality with controlling the volume, tone control circuit through L.P.F. smoothing circuit as shown in Figure 11. In case of being unused this function, use this IC as open connection on pin 25.(Application) 5V25 OUTPUT CLIP DETECTOR L.P.F. SMOOTHING CIRCUIT VOLUME CONTROL CIRCUIT TONE CONTROL CIRCUITpin 25: Open collector output (active low)Figure 11(A) Output (AC wave form) AC(A)t (B) Clip Detector Circuit (internal)DC(B)t (B) Clip Detector Terminal (pin 25) DC(C) 5VGNDtFigure 12Clip Detection72004-05-10

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