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MC33063ADRJR Folha de dados(PDF) 9 Page - Texas Instruments |
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MC33063ADRJR Folha de dados(HTML) 9 Page - Texas Instruments |
9 / 16 page www.ti.com APPLICATION INFORMATION V out ) VF V in(min) * Vsat * Vout V out ) VF V in * Vsat V out ) VF * Vin(min) V in(min) * Vsat 1 f 1 f 1 f ton ) toff ton t off ) 1 ton ) toff ton t off ) 1 ton ) toff ton t off ) 1 ton ) toff * toff ton ) toff * toff ton ) toff * toff 4 10*5 ton 4 10*5 ton 4 10*5 ton 2I out(max) 2I out(max) ton t off ) 1 2I out(max) ton t off ) 1 0.3 I pk(switch) 0.3 I pk(switch) 0.3 I pk(switch) V in(min) * Vsat I pk(switch) t on(max) V in(min) * Vsat * Vout I pk(switch) t on(max) V in(min) * Vsat I pk(switch) t on(max) 9 I outton V ripple(pp) 9 I outton V ripple(pp) I pk(switch) ton ) toff 8V ripple(pp) 1.25(1 ) R2 R1 ) 1.25(1 ) R2 R1 ) *1.25(1 ) R2 R1 ) MC33063A, MC34063A 1.5-A PEAK BOOST/BUCK/INVERTING SWITCHING REGULATORS SLLS636J – DECEMBER 2004 – REVISED OCTOBER 2005 CALCULATION STEP UP STEP DOWN VOLTAGE INVERTING ton/toff (ton + toff) toff ton CT Ipk(switch) RSC L(min) CO Vout See Figure 6 See Figure 8 See Figure 10 Vsat = Saturation voltage of the output switch VF = Forward voltage drop of the chosen output rectifier The following power-supply parameters are set by the user: Vin = Nominal input voltage Vout = Desired output voltage Iout = Desired output current fmin = Minimum desired output switching frequency at the selected values of Vin and Iout Vripple = Desired peak-to-peak output ripple voltage. The ripple voltage directly affects the line and load regulation and, thus, must be considered. In practice, the actual capacitor value should be larger than the calculated value, to account for the capacitor's equivalent series resistance and board layout. 9 |
Nº de peça semelhante - MC33063ADRJR |
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Descrição semelhante - MC33063ADRJR |
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