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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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TEA1097H 데이터시트(PDF) 9 Page - NXP Semiconductors |
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TEA1097H 데이터시트(HTML) 9 Page - NXP Semiconductors |
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9 / 36 page  1999 Apr 08 9 Philips Semiconductors Product specification Speech and loudspeaker amplifier IC with auxiliary inputs/outputs and analog multiplexer TEA1097 Fig.5 Main DC voltages as a function of line current. handbook, full pagewidth 0.07 0.06 8 6 2 0 0 0.01 voltages (V) 0.02 0.05 MICS VDD VBB SLPE LN Iline (A) 0.04 0.03 4 FCA049 EXTERNAL SUPPLY (PINS ESI AND VBB) The TEA1097 can be supplied by the line as well as by external power sources (voltage or current sources) that must be connected to pin ESI. The IC will choose which supply to use according to the voltage it can provide. A voltage supply on ESI is efficient only if its value is greater than the working voltage of the internal VBB voltage stabilizer. Otherwise the IC continues to be line powered. The current consumed on this source is at least equal to the internal consumption. It depends on the voltage difference between the value forced on ESI and the working voltage of the internal stabilizer. The current required increases with the voltage difference to manage. The excess current compared to the internal consumption becomes then available for other purposes such as supplying a loudspeaker amplifier. The voltage source should not exceed 6 V. If the value of the external voltage source can be lower than the working voltage of the internal stabilizer, an external diode is required to avoid reverse current flowing into the external power supply. In case of current source, the voltage on VBB and ESI depends on the current available. It is internally limited to 6.6 V. The current source should not exceed 140 mA. VDD SUPPLY FOR MICROCONTROLLERS (PIN VDD) The voltage on VDD supply point follows the voltage on VBB with a difference equal to 250 mV (typ.) and is internally limited to 3.35 V. This voltage is temperature compensated. This supply point can provide a current up to 3 mA (typ.). Its internal consumption stays low (a few 10 nA) as long as VDD does not exceed 1.5 V (see Fig.6). An external voltage can be connected on VDD with limited extra consumption on VDD (typically 100 µA). This voltage source should not be lower than 3.5 V and higher than 6 V. VBB and VDD can supply external circuits in the limits of currents provided either from the line or from pin ESI, taking into account the internal current consumption. |
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