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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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L6460 датащи(PDF) 53 Page - STMicroelectronics |
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L6460 датащи(HTML) 53 Page - STMicroelectronics |
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53 / 139 page  L6460 Switching regulator controller Doc ID 17713 Rev 1 53/139 Figure 12. Switching regulator controller functional blocks 13.1 Pulse skipping operation Pulse skipping strategy has already been explained on main switching regulator section. This regulator has 4 possible PWM duty cycles that can be changed writing in the SelSwCtrPWM bits in the SwCtrCfg register using SPI. Vout La Vsupply C Driver Control Logic CurrentSense Charge pump Voltage Voltage Loop Control VFBRef - + Under voltage Threshold Filter Ra Rb From Central Logic Regulator Freq - + To Central Logic undervoltage flag Rsense VSWDRV_gate N-CH Fet Vref = 3 V Vref=0.8V SelFBRef[1:0] Uv Threshold 1 SelFBRef Uv Threshold 2 Vref = 3V Vref=0.8V VSWDRV FB VSWDRV SW VSWDRW_sns Table 12. Switching regulator controller PWM specification SwCtrCfg register Duty cycle value Comments SelSwCtrPWM[1:0] Typical 00 9% 01 12% 10 22.5% Default state 11 58% |
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