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AMC34063ADMF датащи(PDF) 7 Page - ADDtek Corp |
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AMC34063ADMF датащи(HTML) 7 Page - ADDtek Corp |
7 / 9 page AMC34063A Copyright © 2006 ADDtek Corp. 7 DD014_E -- JUNE 2006 Typical Design Reference Table: Calculation Step-Down Step-Up Voltage-Inverting ton/toff Vout + VF Vin(min) − Vsat− Vout Vout + VF − Vin(min) Vin(min) − Vsat ?V out? + VF Vin − Vsat ton + toff 1 f 1 f 1 f toff ton + toff ton/toff + 1 ton + toff ton/toff + 1 ton + toff ton/toff + 1 ton (ton + toff) − toff (ton + toff) − toff (ton + toff) − toff CT 4.0 × 10-5 t on 4.0 × 10-5 t on 4.0 × 10-5 t on Ipk(switch) 2Iout(max) 2Iout(max) (ton/toff + 1) 2Iout(max) (ton/toff + 1) RSC 0.3/Ipk(switch) 0.3/Ipk(switch) 0.3/Ipk(switch) L(min) ( (Vin(min)−Vsat−Vout) Ipk(switch) )t on(max) ((Vin(min)−Vsat) Ipk(switch) )t on(max) ((Vin(min)−Vsat) Ipk(switch) )t on(max) CO Ipk(switch)( ton + toff) 8Vripple(pp) 9 Iout ton Vripple(pp) 9 Iout ton Vripple(pp) VF: Forward Voltage drop of the output rectifier Vsat: Saturation voltage of the output switch. The following power supply characteristics must be chosen: Vin - Nominal input voltage Vout - Desired output voltage, ?Vout? = 1.25(1 + R1/R2) Iout - Desired output current. fmin – Minimum desired output switching frequency at the selected values of Vin and IO Vripple(pp) – Desired peak – to – peak output ripple voltage. Application concerns: To get the best regulation performance, Low ESR capacitors at Vout are suggested. |
Аналогичный номер детали - AMC34063ADMF |
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Аналогичное описание - AMC34063ADMF |
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