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L7983 数据表(PDF) 10 Page - STMicroelectronics |
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L7983 数据表(HTML) 10 Page - STMicroelectronics |
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10 / 43 page  Figure 4. Control loop block diagram Ro Ru Rd VREF L Rc Cc Vin Slope compensation Current sense PWM Comparator Power Switches FB Cp Cu Vout Co HS LS + + gcs E/A Integrated compensation Refer to Section 5.7 for further details on power components design. For the adjustable version (L7983PUR), the output voltage can be programmed through an external resistor divider, from 0.85 V up to VIN. The design equation is: VOUT=0.85∙ 1+RURD (1) For the fixed version (L7983PU33R or L7983PU50R), the output voltage programming is achieved by simply shorting the VOUT(FB) pin to the output capacitor. L7983 Control loop and voltage programming DS13354 - Rev 1 page 10/43 |
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