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H34063AP Fiches technique(PDF) 3 Page - Hi-Sincerity Mocroelectronics |
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H34063AP Fiches technique(HTML) 3 Page - Hi-Sincerity Mocroelectronics |
3 / 6 page HI-SINCERITY MICROELECTRONICS CORP. Spec. No. : Preliminary Data Issued Date : 1998.08.01 Revised Date : 1999.06.01 Page No. : 3/6 HSMC Product Specification Block Diagram Application Information Design Formula Table Calculation Step-Down Step-Up Voltage-Inverting ton / toff Vout+VF / Vin(min) -Vsat-VOut Vout+VF-Vin(min) / Vin(min)-Vsat |Vout| + VF / Vin-Vsat (ton + toff) max 1/Fmin 1/Fmin 1/Fmin CT 4*10 -5ton 4*10 -5ton 4*10 -5ton IC(switch) 2*Iout(max) 2*Iout(max)(ton+toff/toff)2*Iout(max)(ton+toff/toff) RS 0.3 / IC(switch) 0.3 / IC(switch) 0.3 / IC(switch) L(min) (Vin(min)-Vsat-Vout / IC(switch)) *ton(max) (Vin(min)-Vsat / IC(switch)) *ton(max) (Vin(min)-Vsat/ IC(switch)) *ton(max) CO IC(switch)*(ton+toff) / 8VRipple(P-P) Iout*ton / VRipple(P-P) Iout*ton / VRipple(P-P) Vsat : Saturation voltage of the output switch. VF : Forward voltage drop of the ringback rectifier. The following power supply characteristics must be chosen : Vin : Nominal input voltage. Vout : Desired output voltage. |Vout|=1.25*(1+RB/RA) Iout- Desired output current Fmin : Minimum desired output switching frequency at the selected values for Vin and Iout. VRipple(P-P) : Desired peak to peak output ripple voltage in practice, the calculated value will need to be increased due to the capacitor equivalent series resistance and board layout. The ripple voltage should be kept to a low value since it will directly effect the line and load regulation. SC Pin1:1.6A Switch Collector TC Pin3:Oscilletor Timing Capacitor GND Pin4:Power GND DRI Pin8:Driver Collector IPK Pin7:Highside Current Sense Input, VCC-VIPK=300mV VCC Pin6:Power Supply Input FB Pin5:Feedback Comparator Inverting Input SE Pin2:Darlington Switch Emitter Q1 Q2 80 Ω QS R CT IPK Oscillator Comparator 1.25V Reference Voltage + - |
Numéro de pièce similaire - H34063AP |
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Description similaire - H34063AP |
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