Practical circuits with STK3048 and STK6153 ----- STK6153 Power Amplifier

Use STK3048 and STK6153 utility, STK6153 Power Amplifier Keywords: Utility in STK3048 and STK6153 Many years ago, I bought the power amplifier formed by STK3048 + STK6153 in the electronics market. It is very cheap. It is actually re-use after foreign garbage sells China, but the sound quality is not bad, and later arrived in Guangzhou Tao Street. , I saw 10 yuan of finished board, people who know the goods knew that people who did not know the goods were considered garbage, haha Thick film integrated circuit STK3048 and STK6153, its playback sound is a scrambled, and the price is extremely high, especially suitable for beginners and friends who prefer integration. [Circuit Principle] (1) Directly pushing the complementary high power tube STK3048 with STK3048, dynamic wide, and differential input tube matching, its co-emitting extreme and output collector terminals use a constant current source load, so it is really low, High gain, strong supply of power ripple suppression. Using STK3048 to push high power tubes not only superior performance but also many pairs of pairs and debugging, simple and reliable. Figure 3-38 is a circuit diagram of power tubes 2n3055 and MJ2955 using STK3048, and the line is simple to unable one element. R1 and R2 can be directly used on the finished board. If the tube is not hot after power-on; no other abnormality is available to adjust the RP, so that the pressure drop on R1 and R2 is 10 to 13 mV, so that VT1 and VT2 are 40 to 50 mA, which is operated in the Alan state. The decoupling capacitor can be welded to the integrated circuit (8) when welding, and other "ground" ends are connected here. The midpoint voltage is more than 10 mV, and the servo circuit can be accessed (measured by 30 mV this paper). After adjusting, you can touch the speaker work. I feel unfair than some middle blockats when I listen. (2) Push the STK6153 STK6153 with a full complementary symmetrical structure, high speed, low noise, high power, and the internal use of constant current bias, there is a state stable. Its outer radiator has been electrically insulated from the inner circuit, and is convenient to use. The circuit is shown in Figure 3-39. Appropriate changes resistance resistance value can adjust the gain of the circuit. Small capacity compact capacitors use high quality CBB capacitors to improve sound quality. This circuit does not have to debug. When I listened, I feel that the treble is surprisingly bright, and even if it is a bit exaggerated, it is very clear, there is no sense of reluctance. Subjective evaluation is very clear than the TDA1514's LM3888, the bass bounce and texture are also quite strong, and the sense of listening is very good.

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