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LA4450F-E Fiches technique(PDF) 4 Page - ON Semiconductor |
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LA4450F-E Fiches technique(HTML) 4 Page - ON Semiconductor |
4 / 8 page LA4450 No.4090-4/8 Test Circuit + + + + + 10k Ω ST DC VCC VCC=26.4V BS1 BS2 OUT1 OUT2 CH1 PWR GND CH2 PWR GND NF2 IN2 PRE LA4450 GND NF1 IN1 100 μF 1000 μF 1000 μF 0.15 μF 2.2 Ω RL=8Ω RL=8Ω 47 μF 1000 μF 100 μF 100 μF 47 μF 0.15 μF 2.2 Ω IN1 IN2 5V − + CH1 − + CH2 ON OFF + + + + 2 3 1 4 5 6 7 10 9 8 11 13 14 12 * *Polyester Film Capacitor * 1. Features and Usage Notes Pin 12 is the standby pin. The IC operates when a voltage of 2V or higher is applied through the external resistor R1. Note that the maximum influx current to pin 12 is 500 A. Changing the voltage gain − + + CNF RNf’ 75 Ω 30K Ω IN NF OUT The voltage gain VG can be lowered by connecting an external resistor in series between the NF pin (pins 8 and 14) and CNF. VG = 20log 30k 75 RNf ’ However, since the IC may oscillate if VG is 30dB or lower, use a VG of 36dB or higher. The LA4450 includes a thermal protection circuit to prevent damage to or destruction of the IC due to abnormal overheating. As a result, the output may be attenuated or cut off if the application heat sinking is inadequate. The LA4450 includes an overvoltage protection circuit to protect the IC against power supply surges and abnormal voltages. This circuit has hysteresis characteristics : it operates at between 39 and 40V, and recovers at around 34V. Although the LA4450 includes a current limiter circuit to prevent damage due to abnormal currents, care must still be exercised to prevent load shorts and other excessive current conditions. |
Numéro de pièce similaire - LA4450F-E |
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Description similaire - LA4450F-E |
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