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TDA7266P 数据表(PDF) 5 Page - STMicroelectronics |
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TDA7266P 数据表(HTML) 5 Page - STMicroelectronics |
5 / 12 page 5/12 TDA7266P Figure 5. Microprocessor Driving Signals 3.1.2 B) Low Cost Application In low cost applications where the µP is not present, the suggested circuit is shown in fig.6. The St-by and mute terminals are tied together and they are connected to the supply line via an external voltage divider. The device is switched-on/off from the supply line and the external capacitor C4 is intended to delay the St-by and mute threshold exceeding, avoiding "Popping" problems. So to avoid any popping or clicking sond, it is important to clock: a Correct Sequence: At turn-ON, the Stand-by must be removed at first, then the Mute must be re- leased after a delay of about 100-200ms. On the contrary at turn-OFF the Mute must be activated as first and then the Stand-by. With the values suggested in the Application circuit the right operation is guaranteed. b Correct Threshold Voltages: In order to avoid that due to the spread in the internal thresholds (see the above limits) a wrong external voltage causes uncertain commutations for the two functions we suggest to use the following values: Mute for Vcc>6.4V : VT = 2.3V Mute for Vcc<6.4V : VT = Vcc/2 - 1 Stand-by : VT = 0.8V +VS(V) VIN (mV) VST-BY pin 11 Iq (mA) ST-BY MUTE PLAY MUTE ST-BY +7.5 1.8 0.8 VMUTE pin 10 4.1 2.3 OFF OFF D03AU1535A VOUT (V) 2.9 1.3 |
类似零件编号 - TDA7266P |
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类似说明 - TDA7266P |
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