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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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STA321 数据表(PDF) 60 Page - STMicroelectronics |
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STA321 数据表(HTML) 60 Page - STMicroelectronics |
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60 / 157 page  CMOS power stage STA321 60/157 Doc ID 15351 Rev 3 8 CMOS power stage The CMOS half-bridge circuit of Figure 36 is a single channel analog output power stage. There are three such output stages in the STA321, one for each of the outputs OUT1-3. The switching mode is regulated by the logic circuit which ensures that the MOSFETs are switched in such a way as to avoid (or minimize) conditions where both the PMOS and the NMOS are conducting at the same time. The input is a 1.8-V to 3.3-V level shifter followed by some combinational logic. Figure 36. CMOS half bridge block diagram Table 24. CMOS bridge signal descriptions Pin Name Direction Description FFX-ch In Digital audio signal coming from FFX block Powerdown In Powerdown signal coming from the FFX block Tristate In 3-state signal from the FFX block PopFree In Pop-free signal from the FFX block Fault Out Short-circuit fault output feedback signal to digital core (active low) Out Out Channel half-bridge analog output VCC33/GND33 Supply Pre-driver analog supply VDD/GND Supply Digital core supply generated by internal regulator VCCx/GNDx Supply Half-bridge power supply Logic Pop-free OutN Driver P Driver N Level shifter Enable logic Power Vcc33 GND33 Fault GND33 GND GNDx VDD VCC33 VCCx PopFree Tristate FaultN FFX-ch N Powerdown |
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