Brief introduction of TA8205AH in car amplifier

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The TA8205AH is a 22W x 2 two-channel audio power amplifier integrated circuit manufactured by Toshiba Corporation and is available in a 17-pin package.
Each channel consists of a preamplifier stage and a power amplifier stage. The power amplifier stage is internally connected to the BTL form, so the output power is large, and it is widely used in many brands such as Mitsubishi Pajero and CLARION, and SONY. High-end audio. TA8205AH has low thermal resistance coefficient, low noise, adjustable voltage gain and low distortion. In addition to overload protection, overheat protection, short circuit protection and mute function, TA8205AH also has a standby function. Its operating voltage range is 9~18V. When Vcc=13.2V, f=1kHz, RL=4Ω, Po=15W×2 (THD=10%); at Vcc=14.4V, f=1kHz, RL=4Ω At the time, PO = 18 W × 2 (THD = 10%). The application circuit of TA8205AH is shown in the figure.
The 1st and 4th feet of the TA8205AH are the squelch control and standby control pins. When the voltage of pin 1 is in the range of 1.0~2.0V, the mute function is turned off. When the voltage of pin 1 is lower than the threshold level of 1V, the mute circuit works. When the voltage of the 4-pin is greater than the threshold voltage of 2.5V, the internal electronic switch of the circuit is turned on, and the circuit outputs normal power. As long as the voltage of the 4-pin is lower than 2.5V, the circuit is in the standby state without power output. If the standby function is not used, the 4 pin can be connected to the power supply VCC. At this time, the operating current of the amplifier is only about C1 as the input coupling capacitor, and C2 is the negative feedback capacitor of the preamplifier. The capacities of C1 and C2 should be based on the specific use. Come match to get the best anti-shock effect. C3 is a filter capacitor that reduces power supply fluctuations. It determines the time constant at which steady state is reached during turn-on/off. C4 is an anti-vibration capacitor, and a series-connected resistor constitutes an anti-vibration circuit. Generally, a polyester film capacitor having a good temperature characteristic and a high-frequency characteristic is used. C5 is the power supply filter capacitor, and C6 is the noise absorbing capacitor at the input end.