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BA5972FP データシート(PDF) 8 Page - Rohm |
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BA5972FP データシート(HTML) 8 Page - Rohm |
8 / 9 page 669 Optical disc ICs BA5972FP FOperation notes (1) The BA5972FP contains a thermal shutdown cir- cuit. When the chip temperature reaches 175 _C (Typ.), the output current is muted. If the chip temperature then drops below 150 _C (Typ.), then the mute is released. (2) By having the mute pin (pin 7) voltage pulled up to 2.0V or greater, you can mute the output current for chan- nels 1 and 4. For normal conditions, have pin 7 open or at 0.5V or below. (3) If the voltage of the bias pin (pin 1) drops below 1.4V (Typ.), outputs are muted. For normal conditions, have the voltage above 1.7V. (4) If the power supply voltage drops below 3.8V (Typ.), internal circuits turn off. If the power supply voltage then rises to 4.0V (Typ.), the circuits turn on. (5) If the voltage of the thermal shutdown, mute ON, or bias pin drops, or if the power supply voltage drops, the mute is activated; however, in these situations, only the drivers are muted. Also, the output pin voltage becomes the internal bias voltage (approx. VCC / 2). (6) If the standby pin voltage is open or 0.5V or below, the circuit current enters the standby condition. For normal operation, have the standby pin voltage pulled up to 2.0V or greater. (7) Connect a bypass capacitor (approx. 0.1 µF) be- tween the bases of the power supply pins of this IC. (8) Even though the radiation fins are connected to ground within the package, be sure to also connect them to a ground externally as well. (9) The application example will assure excellent re- sults, but nevertheless, be sure to carefully check all characteristics during use. During use with constants in the external circuitry modified, be sure to leave a suffi- cient margin in order to take into consideration fluctua- tions in the static and transient characteristics of the ex- ternal components and this IC. Also, be aware that ROHM has not sufficiently performed all confirmations regarding patent rights. FElectrical characteristic curves |
同様の部品番号 - BA5972FP |
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同様の説明 - BA5972FP |
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