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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) 51 Page - STMicroelectronics |
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L6460 датащи(HTML) 51 Page - STMicroelectronics |
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51 / 139 page  L6460 Main switching regulator Doc ID 17713 Rev 1 51/139 Figure 11. Main switching regulator functional blocks In pulse skipping control the duty cycle must be chosen by the user depending on supply voltage and output regulated voltage. Therefore the switching regulator has 4 possible duty cycles that can be changed by writing the VmainSwSelPWM bits in the MainSwCfg register according to following Table 10. The output current is limited to a value that can be set by means of SelIlimit bit in the MainSwCfg register according to following Table 11. Table 10. Main switching regulator PWM specification MainSwCfg register Duty cycle value Comments VmainSwSelPWM[1:0] Typical 00 12% 01 15% 10 26% Default state 11 63.5% Table 11. Main switching regulator current limit SelIlimit Current limit (min) Comments 0 3.3A Default state 12.3A La VSupply C High Side Driver Control Logic Current Sense Charge pump Voltage VSWmain_FB Voltage Loop Control Regulator Ref - + Under voltage Threshold Filter Ra Rb From Central Logic Regulator Freq - + To Central Logic Under voltage flag VSWmain_SW |
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