34063A データシートの表示（PDF） - Estek Electronics Co. Ltd

部品番号

コンポーネント説明

一致するリスト

34063A

monolithic control circuit containing the primary functions required for DC-to-DC converters

Estek Electronics Co. Ltd 

34063

Calculation

ton/toff

(ton+toff)max

CT

lpk(switch)

RSC

L(min)

CO

Design Formula Table

Step-Up

+ out − inV

V Vin (min)

− V sat

1

f 4.0 x 10-5 ton

2

tI



(max)



on



+ 1

0.3/lpk(switch)







V − in

sat

I V pk ( switch)





×ton

(max)

9 I out ton

Vripple( pp )

Step-Down

+ VF

−V − in (min)

sat

V V out

1

f 4.0x10-5 ton

2I out (max)

0.3/lpk(switch)

 Vin



(min)

I

pk

V sat

( switch

)

Vout

−

 × on (max)



I pk ( switch )

+)

(

t

8Vripple

(

pp

t

)

Voltage-Inverting

out + VF

V

in

+ Vsat

V

1

fmin

4.0 x 10-5





2I



ont

+ 1

0.3/lpk(switch)

 VinI(mpkin()switcVh)sat

−



t on(max)

tI

9

Vripple( pp )

TERMS AND DEFINITIONS

Vsat - Saturation voltage of the output switch.

VF -

Forward voltage drop of the output rectifier.

The following power supply characteristics must be chosen:

R

Vout = .1 2 5 11R+ 

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 IO.

Vripple(p-p) –Desired peack-to-peack 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.

Ordering Information

O RDERING NUM BER

34063A

P ACK AGE

SOP-8 /DIP-8

M ARKING

MC34063A

Address :

6A06--6A07

Rm 6A07,Changyin Office Building ,No.88,Yong Ding Road,Hai Dian District ,Beijing

Postalcode:100039

Tel: 86-010-58895780 / 81 / 82 / 83 / 84 Fax : 010-58895793

Http://www.estek.com.cn

Email:sales@estek.com.cn

REV No:01-060810

BEIJING ESTEK ELECTRONICS CO.,LTD

7

Share Link: