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PDF LR34063D Data sheet ( Hoja de datos )
| Número de pieza | LR34063D | |
| Descripción | DC-DC Converter Control Circuits | |
| Fabricantes | LRC | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LR34063D (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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LESHAN RADIO COMPANY, LTD.
DC-DC Converter
Control Circuits
LR34063
DESCRIPTION:
The LR34063 Series is a monolithic control circuit containing
the primary functions required for DC-to-DC converters.These
devices consist of an internal temperature compensated refe-
rence,comparator, controlled duty cycle oscillator with an active
current limit circuit, driver and high current output switch.This
series was specifically designed to be incorporated in Step-Down
and Step-Up and Voltage-Inverting applications with a minimum
number of external components.
DIP-8
FEATURE:
z Operation from 3.0 V to 40 V Input
z Low Standby Current
z Current Limiting
z Output Switch Current to 1.5 A
z Output Voltage Adjustable
z Frequency Operation to 100 kHz
z Precision 2% Reference
SOP-8
ORDERING INFORMATION
Device
LR34063
LR34063D
Package
DIP-8
SOP-8
BLOCK DIAGRAM
Drive 8
Collector
Ipk 7
Sense
6
VCC
Comparator 5
Inverting
Input
S Q Q2
R
100
Q1
Ipk
Oscillator
CT
Comparator
+ 1.25 V
Reference
– Regulator
1
Switch
Collector
2 Switch
Emitter
3 Timing
Capacitor
4
Gnd
(Bottom View)
PIN CONNECTIONS
Switch
Collector
Switch
Emitter
1
2
Timing 3
Capacitor
Gnd 4
8
Driver
Collector
7 Ipk Sense
(Top View)
6 VCC
Comparator
5 Inverting
Input
LR34063-1/12
1 page  
LESHAN RADIO COMPANY, LTD.
LR34063
8
180
7
Rsc
0.22
Vin 6
12 V +
100
5
170 mH
L
1
SQ
R
Q2
Q1
Ipk CT
OSC
VCC
+
− Comp.
1.25 V
Ref
Reg
2
1N5819
3
CT
1500
pF
4
R1 2.2 k
R2
47 k
Vout
28 V/175 mA
+
330 CO
1.0 mH
Vout
+
100
Optional Filter
Test
Line Regulation
Load Regulation
Output Ripple
Efficiency
Output Ripple With Optional Filter
Conditions
Vin = 8.0 V to 16 V, IO = 175 mA
Vin = 12 V, IO = 75 mA to 175 mA
Vin = 12 V, IO = 175 mA
Vin = 12 V, IO = 175 mA
Vin = 12 V, IO = 175 mA
Figure 7. Step−Up Converter
Results
30 mV = ±0.05%
10 mV = ±0.017%
400 mVpp
87.7%
40 mVpp
LR34063-5/12
5 Page 
Mechanical Dimensions
LESHAN RADIO COMPANY, LTD.
LR34063
SOP-8
Unit: mm
f
e
e
f
e
e
' f
'
efe
¶
5
5
efe
LR34063-11/12
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet LR34063D.PDF ] | |
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