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TS4972 数据表(PDF) 25 Page - STMicroelectronics |
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TS4972 数据表(HTML) 25 Page - STMicroelectronics |
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25 / 30 page  Application Information TS4972 25/30 Application n°4 : Differential inputs BTL power amplifier In this configuration, we need to place these components : R1, R4, R5, R6, R7, C4, C5, C12. We have also : R4 = R5, R1 = R6, C4 = C5. The differential gain of the amplifier is: Note : Due to the VICM range (see Operating Condition), GVDIFF must have a minimum value shown in figure 84. For Vcc=5V, a 20Hz to 20kHz bandwidth and 20dB gain BTL power amplifier you could follow the bill of material below. Components: C10 Short Circuit C12 1µF S1, S2, S6, S7 2mm insulated Plug 10.16mm pitch S8 3 pts connector 2.54mm pitch P1 SMB Plug Figure 84: Minimum Differential Gain vs Power Supply Voltage Designator Part Type G VDIFF = 2 R1 R4 -------- 2.5 3.0 3.5 4.0 4.5 5.0 5.5 10 15 20 25 30 35 40 Power Supply Voltage (V) Designator Part Type R1 110k / 0.125W R4 22k / 0.125W R5 22k / 0.125W R6 110k / 0.125W R7 100k / 0.125W R8 Short circuit C4 470nF C5 470nF C6 100µF C7 100nF C9 Short Circuit C10 Short Circuit C12 1µF S1, S2, S6, S7 2mm insulated Plug 10.16mm pitch S8 3 pts connector 2.54mm pitch P1, P2 SMB Plug |
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