In this paper, the power amplifier part with the highest failure rate of the car radio and receiver, combined with the actual measurement and collection of information, is a special introduction to this type of IC.
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1. Special IC for brand machine
Figure 1 is the Japanese pioneer company car audio dedicated power amplifier IC PAL006A (measured model DEH-P3300), the IC uses MOSFET output stage, 25-pin single-sided double-row sawtooth package, contains 4 sets of BTL power amplifier, the maximum power 50Wx4.
Figure 2 shows the power amplifier stage of the Ford XLlF-18C870-ED retractor made by ALPINE for Ford. The IC is a PHILIPS 70039AB type, 17-pin single-sided dual in-line package with two sets of BTL circuits. It is also used in Clarion Addzest, a Japanese company.
2. Widely used TA8210AH~TA8215L series BTL stereo IC
As shown in Figure 3, the TA8210AH is a 17-pin single-sided dual-row zigzag package, and the TA82l5L is a 17-pin single-in-line type.
3. Mono BTL dedicated IC
The MB3730 (single-row, 7-pin in-line type) is commonly used in Toyota vans and some Panasonic retractable machines. The measured model in Figure 4 is OYOTA1806.
4. Other BTL-specific ICs (see Figure 5 - Figure 7)
Some brands of dedicated 4-channel BTL amplifier ICs (such as PAL006A in Figure 1, and similar PAL005A) are basically the same as the commercial TDA7382, and are interchangeable. In addition, the high-density assembly process of the new car audio (such as the main circuit board of Figure 2 "Ford" Ford XL1F is a double-sided double-layered layer with a thickness of 1.8mm, that is, "four-sided copper plate"), which makes the line during maintenance. Follow-up is more difficult.
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