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MC33063ADRG4 Datasheet(PDF) 10 Page - Texas Instruments |
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MC33063ADRG4 Datasheet(HTML) 10 Page - Texas Instruments |
10 / 20 page 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 SLLS636L – DECEMBER 2004 – REVISED DECEMBER 2009 www.ti.com APPLICATION INFORMATION 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. 10 Submit Documentation Feedback Copyright © 2004–2009, Texas Instruments Incorporated Product Folder Link(s): MC33063A MC34063A |
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