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34063 데이터시트 PDF




Estek Electronics에서 제조한 전자 부품 34063은 전자 산업 및 응용 분야에서
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부품번호 34063 기능
기능 monolithic control circuit containing the primary functions required
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34063 데이터시트, 핀배열, 회로
34063
Description
The MC34063A Series is a monolithic control circuit containing the primary functions required for DC-to-DC converters.
These devices consist of an internal temperature compensated reference, comparator, controlled duty cycle oscillator
with an active current limit circuit, driver and high current output switch. This series was specifically designed to be
incwowrpwo.drataesdheinetS4ute.cpo-mDown and Step-Up and Voltage-Inverting applications with a minimum number of external
components.
Features
• Operation from 3.0 V to 40 V Input
• Low Standby Current
• Current Limiting
• Output Switch Current to 1.5 A
• Output Voltage Adjustable
• Frequency Operation to 100 kHz
• Precision 2% Reference
Plastic Package
Pin Connections
Internal Block Digram
Driver 8
Collector
Ipk 7
Sense
VCC
Comparator
Inverting
Input
6
5
SQ
R
1 Switch
Collector
Q2
Q1
Ipk
Oscillator
CT
Comparator
100
1.25 V
Reference
2 Switch
Emitter
3 Timing
Capacitor
4 Gnd
BEIJING ESTEK ELECTRONICS CO.,LTD
1




34063 pdf, 반도체, 판매, 대치품
Typical Applications Circuit
www.datasheet4u.com
34063
Figure 1. Step-Up Converte .r
Note: R to 0 for constant Vin
Figure 2a. External NPN Switch.
Figure 2b. External NPN Saturated Switch.
Figure 2. External Current Boost Connections for I eak Greater than
P 1.5 .A
BEIJING ESTEK ELECTRONICS CO.,LTD
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34063 전자부품, 판매, 대치품
34063
Design Formula Table
Calculation
ton/toff
www.datasheet4u.com
Step-Up
+out
V inV
(min)
Vsat
inV
(ton+toff)max
CT
lpk(switch)
RSC
L(min)
CO
1
f4.0 x 10-5 ton
2
tI
(max)
on
+ 1
0.3/lpk(switch)

V in sat
I Vpk ( switch)
×ton
(max)
9 I out ton
Vripple( pp )
Step-Down
+ VF
V in (min)
sat
V Vout
1
f4.0x10-5 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
V1
fmin
4.0 x 10-5

2I
ont
+ 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 25 11R+
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
REV No:01-060810
BEIJING ESTEK ELECTRONICS CO.,LTD
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