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BA6795FP 数据表(PDF) 10 Page - Rohm |
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BA6795FP 数据表(HTML) 10 Page - Rohm |
10 / 11 page 481 Optical disc ICs BA6795FP FOperation notes (1) The BA6795FP has an internal thermal shutdown circuit. Output current is muted when the chip tempera- ture exceeds 175 _C (typically). (2) If the mute pin (pin 7) voltage is opened or lowered below 0.5V, the output current will be muted. Pin 7 should be pulled up above 2.0V during normal use. (3) The bias pin (pin 23) 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 4.3V (typically), and starts up again when the voltage rises above 4.5V (typically). (6) Fluctuation due to temperature occurs in the gain when using an attached resistor as the input resistor for a driver other than the spindle driver (typically 2200ppm per degree) or for the spindle driver (typically 4600ppm per degree. (Only when using the gain adjustment pin.) (7) Be sure to connect the IC to a 0.1 µF bypass capaci- tor to the power supply, at the base of the IC. (8) The radiating fin is connected to the package’s in- ternal GND, but should also be connected to an external ground. (9) The capacitor between regulator output (pin 6) and GND also serves to prevent oscillation of the IC, so select one with good temperature characteristics. FElectrical characteristic curves |
类似零件编号 - BA6795FP |
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类似说明 - BA6795FP |
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