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High transition frequency, Power amplifier applications, Driver stage amplifier applications.

2SC4793 Silicon NPN & PNP Epitaxial Type Power Amplifier


Manufacturer:  Utsource
Configuration: Single
Transistor Polarity: NPN
Collector- Base Voltage VCBO: 230 V
Collector- Emitter Voltage VCEO Max: 230 V
Emitter- Base Voltage VEBO: 5 V
Maximum DC Collector Current: 1 A
Gain Bandwidth Product fT: 100 MHz
Maximum Operating Temperature: + 150 C
Mounting Style: Through Hole
Package / Case: TO-220-3 FP
DC Collector/Base Gain hfe Min: 100
DC Current Gain hFE Max: 320
Minimum Operating Temperature: - 55 C
Packaging: Reel
Pd - Power Dissipation: 2 W
Factory Pack Quantity: 50

2SC4793 Power Amplifier IC Chips
A power amplifier is an amplifier that produces the maximum output to drive a load (such as a loudspeaker) at a given distortion rate. The power amplifier plays the pivotal role of "organization and coordination" in the whole sound system, and in a certain extent, it detetmines whether the whole system can provide good quality output.

The working principle of power amplifier:
The power of the power is converted to the power by the current control action of the triode or the voltage control of the field effect tube.
Using the current control of the triode or the voltage control of the field effect tube, the power is converted to the current that changes according to the input signal. Because sound is different amplitude and frequency of the wave, namely the ac signal current, the transistor's collector current is always base current beta times, beta is the magnification of triode. So if the small signal is injected into the base, the collector through the current will be equal to base current beta times, and then isolates this signal by isolation condenser, get the current (or voltage) that is the original beta times large signal. This phenomenon become a triode amplifying function. After constant current amplification, the power amplification is completed.
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