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零件编号 | LR34063D | ||
描述 | DC-DC Converter Control Circuits | ||
制造商 | LRC | ||
LOGO | |||
1 Page
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
LESHAN RADIO COMPANY, LTD.
LR34063
8
7
Rsc
0.24
Vin
4.5 V to 6.0 V +
100
6
5
1
SQ
R
Q2
Q1
Ipk
OSC
CT
VCC
+
− Comp.
1.25 V
Ref
Reg
2
L 88 mH
3
+ 1500
pF
4
1N5819
R2 8.2 k
R1
953
1000 mf
Vout
−12 V/100 mA
+ CO
1.0 mH
Vout
100
+
Optional Filter
Test
Line Regulation
Load Regulation
Output Ripple
Short Circuit Current
Efficiency
Output Ripple With Optional Filter
Conditions
Vin = 4.5 V to 6.0 V, IO = 100 mA
Vin = 5.0 V, IO = 10 mA to 100 mA
Vin = 5.0 V, IO = 100 mA
Vin = 5.0 V, RL = 0.1 W
Vin = 5.0 V, IO = 100 mA
Vin = 5.0 V, IO = 100 mA
Figure 11. Voltage Inverting Converter
Results
3.0 mV = ± 0.012%
0.022 V = ± 0.09%
500 mVpp
910 mA
62.2%
70 mVpp
8
7
Vin 6
1
8
27
Vout
Vin 6
1
Vout
2
Figure 12. External Current Boost Connections for IC Peak Greater than 1.5 A
12a. External NPN Switch
12b. External PNP Saturated Switch
LR34063-8/12
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页数 | 12 页 | ||
下载 | [ LR34063D.PDF 数据手册 ] |
零件编号 | 描述 | 制造商 |
LR34063 | DC-DC Converter Control Circuits | LRC |
LR34063D | DC-DC Converter Control Circuits | LRC |
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