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TDA8547TS Folha de dados(PDF) 5 Page - NXP Semiconductors |
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TDA8547TS Folha de dados(HTML) 5 Page - NXP Semiconductors |
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5 / 21 page  1998 Apr 01 5 NXP Semiconductors Product specification 2 × 0.7 W BTL audio amplifier with output channel switching TDA8547TS SELECT pin If the voltage at the SELECT pin is in the range between 1.5 V and VCC − 1.5 V, or if it is kept floating, then both channels can be operational. If the SELECT pin is set to a LOW voltage or grounded, then only channel 2 can operate and the power amplifier of channel 1 will be in the standby mode. In this case only the loudspeaker at channel 2 can operate and the loudspeaker at channel 1 will be switched off. If the SELECT pin is set to a HIGH level or connected to VCC, then only channel 1 can operate and the power amplifier of channel 2 will be in the standby mode. In this case only the loudspeaker at channel 1 can operate and the loudspeaker at channel 2 will be switched off. Setting the SELECT pin to a LOW or a HIGH voltage results in a reduction of quiescent current consumption by a factor of approximately 2. Switching with the SELECT pin during operating is not plop-free, because the input capacitor of the channel which is coming out of standby needs to be charged first. For plop-free channel selecting the device has first to be set in mute condition with the MODE pin (between 1.5 V and VCC − 1.5 V), then set the SELECT pin to the new level, after a delay set the MODE pin to a LOW level. The delay needed depends on the values of the input capacitor and the feedback resistors. Time needed is approx. 10 × C1 × (R1 + R2), so approximately 0.6 s. for the values in Fig.4. Table 1 Control pins MODE and SELECT versus status of output channels Voltage levels at control pins at VP = 5 V; for other supply voltages see Figs. 14 and 15. Notes 1. HIGH = Vpin >VCC − 0.5 V. 2. NC = not connected or floating. 3. X = don’t care. 4. HVP = 1.5 V < Vpin <VCC − 1.5 V. 5. LOW = Vpin <0.5 V. LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 134). CONTROL PIN STATUS OF OUTPUT CHANNEL TYP. Iq (mA) MODE SELECT CHANNEL 1 CHANNEL 2 HIGH(1)/NC(2) X(3) standby standby 0 HVP(4) HVP(4)/NC(2) mute mute 15 LOW(5) HVP(4)/NC(2) on on 15 HVP(4)/LOW(5) HIGH(1) mute/on standby 8 HVP(4)/LOW(5) HVP(4)/NC(2) mute/on mute/on 15 HVP(4)/LOW(5) LOW(5) standby mute/on 8 SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT VCC supply voltage operating −0.3 +18 V VI input voltage −0.3 VCC +0.3 V IORM repetitive peak output current − 1A Tstg storage temperature −55 +150 °C Tamb operating ambient temperature −40 +85 °C VPsc AC and DC short-circuit safe voltage − 10 V Ptot power dissipation − 1.1 W |
Nº de peça semelhante - TDA8547TS_15 |
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Descrição semelhante - TDA8547TS_15 |
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