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BA6798 Datasheet(PDF) 6 Page - Rohm |
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BA6798 Datasheet(HTML) 6 Page - Rohm |
6 / 8 page 379 Optical disc ICs BA6798S FApplication example FOperation notes (1) The BA6798S has an internal thermal shutdown cir- cuit. Output current is muted when the chip temperature exceeds 175 _C (typically). (2) If the mute pin (pin 6) voltage is opened or lowered below 0.5V, the output current will be muted. Pin 6 should be pulled up above 2.0V during normal use. (3) The bias pin (pin 17) is muted when lowered below 1.4V (typically). Make sure it stays above 1.6V during normal use. (4) Muting occurs during thermal shutdown, mute-on operations or a drop in the bias pin voltage or supply volt- age. In each case, only the drivers are muted. During muting, the output pins remain at the internal bias volt- age, roughly (VCC *VF / 2). (5) The driver circuit shuts down when the supply volt- age drops below 4.5V (typically), and starts up again when the voltage rises above 4.7V (typically). (6) Be sure to connect the IC to a 0.1 µF bypass capaci- tor to the power supply, at the base of the IC. (7) The capacitor between regulator output (pin 7) and GND also serves to prevent oscillation of the IC, so select one with good temperature characteristics. |
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Descripción similar - BA6798 |
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