TDA4866 test circuit
The following is the circuit diagram of [TDA4866 test circuit] 
The test circuit of the TDA4866 is shown above. The working principle is that when the positive power supply voltage VP and the retrace power supply voltage VFB are added, the circuit starts to work. The input signal is input to the inverting input terminal and the non-inverting input terminal of the internal differential input stage by the 1st and 2nd pins, and the vertical output stage will be The sawtooth voltage is amplified and output by pins 6 and 4. In the test circuit, a 6Ω resistor is used as a dummy load to replace the deflection yoke, and the output signal is fed back to the 9th pin via Rref. 40V ≤ VFB ≤ 60V, RFB = 100Ω, CFB = 22μF, CSP = 10 ~ 330nF, RSP = 10 ~ 22Ω.
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