NJM2073D Integrated Circuits (ICs)

Series:	--
Packaging:	Tube
Lead Free Status / RoHS Status:	--
Part Status:	Active
Type:	Class AB
Output Type:	1-Channel (Mono) or 2-Channel (Stereo)
Max Output Power x Channels @ Load:	2W x 1 @ 16 Ohm; 270mW x 2 @ 8 Ohm
Voltage - Supply:	1.8 V ~ 15 V
Features:	Depop
Mounting Type:	Through Hole
Operating Temperature:	-40°C ~ 85°C (TA)
Supplier Device Package:	8-DIP
Package / Case:	8-DIP (0.300", 7.62mm)

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NJM2073D application field and working principleNJM2073D is an enchanced dual J-FETbipolar hybrid audio amplifier integrated circuit (IC) designed by NJR Corporation. It enables audio engineers to reduce the number of external components while delivering high-efficiency performance.The NJM2073D IC is popular with both professional audio amplification and consumer electronic applications in home appliances and audio equipment. Specifically, it can be used for a variety of components, such as audio power amplifiers, preamplifiers, input amplifiers, headphone amplifiers, and microphone amplifiers. This versatile audio amplifier IC can provide excellent sound quality for both low power and high power applications.The NJM2073D has two J-FETs, which are used for voltage amplification and current gain. The two bipolar transistors are used for voltage gain in the audio channel. By combining these transistors, the output level can be increased, and the necessity of additional external power supply circuits is eliminated. The operation voltage range of the NJM2073D IC is from 1.8V to 13V, making it suitable for many batteries-operated portable audio applications.The NJM2073D integrates a high-perfromance voltage regulator to regulate the bias voltage and minimize the quiescent current, allowing it to achieve outstanding efficiency while reducing the total power consumption. Its high power efficiency (up to 90%) ensures that the audio quality is not degraded, especially when the speakers are operating at high levels.The NJM2073D also integrates special circuitry to reduce noise, distortion, and high frequency noise. Its low distortion (THD+N) of 0.01%, allows for optimal clarity and high-quality sound. Moreover, its active current limiting circuitry protects the speaker from damage due to sudden high-voltage signals.In addition to its low power consumption, the NJM2073D also offers extremely low output impedance, which helps to reduce the frequency response of the headphones or speakers and maintain a natural sound. The total output – input differential gain block also features an output impedance compensation (OIC) function, which helps to further reduce the speaker/headphone output impedance, resulting in improved sound quality.Furthermore, the NJM2073D integrates thermal shutdown and over-current protection circuitry, ensuring longer life and reliable operation. The thermal protection function prevents the IC from being damaged due to the high output current when the temperature exceeds the rated limit. The over-current protection circuit monitors the output current and reduces it to the safe level when it exceeds the specified limit.Overall, the NJM2073D integrated circuit audio amplifier is widely used in high-performance audio applications, as it provides a combination of high-performance performance, low-voltage operation, and efficient power consumption. It also enables audio engineers to design products that deliver excellent sound.

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