AP34063 查看數據表（PDF） - Anachip Corporation

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产品描述 (功能)

比赛名单

AP34063

Universal DC/DC Converter

Anachip Corporation 

Universal DC/DC Converter

AP34063

Design Formula Table

Calculation

ton /toff

(ton + toff)

toff

ton

CT

Ipk(switch)

Rsc

L(min)

CO

Step-Up

Vout +VF -Vin(min)

Vin(min) - Vsat

1/f

ton +toff

ton

+1

toff

(ton +toff)-toff

4.0×10-5ton

2Iout(max) (ton /toff +1)

0.3/Ipk(switch)

(Vin(min) – Vsat )

Ipk(switch)

ton(max)

Iout ton

9

Vripple(pp)

Step-Down

Voltage-Inverting

vout +vF

vin(min) -vsat - vout

1/f

Ivout l+vF

Vin -vsat

1/f

ton +toff

ton +toff

ton

+1

toff

ton

+1

toff

(ton +toff)-toff

4.0×10-5ton

2Iout(max)

(ton +toff)-toff

4.0×10-5ton

2Iout(max) (ton /toff +1)

0.3/Ipk(switch)

0.3/Ipk(switch)

(Vin(min) – Vsat -Vout)

ton(max)

Ipk(switch)

(Vin(min) – Vsat )

Ipk(switch)

ton(max)

Ipk(switch) (toff +ton )

8Vripple(pp)

Iout ton

9

Vripple(pp)

Vsat = Saturation voltage of the output switch.

VF = Forward voltage drop of the output rectifier.

The following power supply characteristics must be chosen:

Vin -Nominal input voltage.

Vout -Desired output voltage, |Vout|=1.25(1+R2/R1)

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, In practice, the calculated capacitor value will need to

be increased due to its equivalent series resistance and board layout. The ripple voltage should be

kept to a low value since it will directly affect the line and load regulation.

Anachip Corp.

www.anachip.com.tw

10/10

Rev.A5 Feb.10, 2004

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