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LA4810M Arkusz danych(PDF) 7 Page - Sanyo Semicon Device |
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LA4810M Arkusz danych(HTML) 7 Page - Sanyo Semicon Device |
7 / 12 page LA4810M No.8213-7/12 Operating Precautions 1. Electronic volume control (pin 14) The voltage gain of the variable gain preamplifier can be changed by controlling the dc voltage at pin 14 (max. gain is approx. 13.5 dB). Pin 14 must be connected to GND when the internal electronic volume control is not to be used. The recommended resistance of the external variable resistor is 20 k Ω or greater. Maximum gain → V14=0V (GND) Minimum gain → V14=1.25V (voltage at pin 15) 2. Stereo/BTL selector pin (pin 2) The stereo and monaural BTL modes can be selected by controlling pin 2. Stereo mode Pin 2 → Connect to GND (or 0.3V or below). BTL mode Pin 2 → Keep open. 3. Phase compensation components (C6, R1, C7, and R2) Note that the values of the phase compensation capacitors and resistors to be connected to the output pins (pins 7 and 10) vary depending on their print pattern. C6, C7: 0.1 µF or greater R1, R2: 1.5 to 4.7 Ω 4. Power supply bypass capacitor (C11) The bypass capacitor C11 must be placed as close to the power pin (pin 9) as possible. 5. Ground of the power amplifier output stage Pins 6 and 11 serve as GND pins for the power amplifier output stage. Their print pattern must be designed so that the pins are kept as low in impedance as possible. 6. Short-circuit across pins Turning on the IC with some of its pins short-circuited may cause characteristic deterioration of or fatal damage to the IC. After installing the IC on a board and before turning on power, make sure that its pins are not short-circuited by solder or other foreign materials. 7. Short-circuit of the load Keeping the IC with its load short-circuited for an extended period of time may cause characteristic deterioration of or fatal damage to the IC. Never short-circuit the load of the IC. 8. Maximum ratings It is likely that the maximum ratings of the IC may be exceeded on a slight change in operating conditions if the IC is used at or near its ratings. Since such a condition may lead to a fatal failure accident, allow for adequate margins for fluctuations in supply voltage and to make sure that the IC is used within its maximum ratings range. |
Podobny numer części - LA4810M |
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Podobny opis - LA4810M |
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