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PDF 33063AP Data sheet ( Hoja de datos )
| Número de pieza | 33063AP | |
| Descripción | MC33063AP | |
| Fabricantes | Motorola Semiconductors | |
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DC-to-DC Converter
Control Circuits
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 incorporated in
www.DataSheet4SUt.ecpo–mDown and Step–Up and Voltage–Inverting applications with a
minimum number of external components. Refer to Application Notes
AN920A/D and AN954/D for additional design information.
• 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
Order this document by MC34063A/D
MC34063A
MC33063A
DC–to–DC CONVERTER
CONTROL CIRCUITS
SEMICONDUCTOR
TECHNICAL DATA
8
1
P, P1 SUFFIX
PLASTIC PACKAGE
CASE 626
8
1
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SO–8)
Representative Schematic 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)
This device contains 51 active transistors.
MOTOROLA ANALOG IC DEVICE DATA
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
ORDERING INFORMATION
Device
Operating
Temperature Range Package
MC33063AD
SO–8
TA = – 40° to +85°C
MC33063AP1
Plastic DIP
MC33063AVD
SO–8
TA = –40° to +125°C
MC33063AVP
Plastic DIP
MC34063AD
MC34063AP1
TA = 0° to +70°C
SO–8
Plastic DIP
© Motorola, Inc. 1996
Rev 5
1
1 page  
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MC34063A MC33063A
Figure 7. Step–Up Converter
170 µH
8
180
7
Rsc
0.22
Vin 6
12 V +
100
5
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 µH
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
Results
30 mV = ±0.05%
10 mV = ±0.017%
400 mVpp
87.7%
40 mVpp
Figure 8. External Current Boost Connections for IC Peak Greater than 1.5 A
8a. External NPN Switch
8b. External NPN Saturated Switch
(See Note 5)
8
1 Vout 8
R
1
Vout
7
Rsc
Vin 6
7
2
Rsc
Vin 6
2
R ³ 0 for
constant Vin
NOTE:
5. If the output switch is driven into hard saturation (non–Darlington configuration) at low switch currents (≤ 300 mA) and high driver currents
(≥ 30 mA), it may take up to 2.0 µs to come out of saturation. This condition will shorten the off time at frequencies ≥ 30 kHz, and is magnified
at high temperatures. This condition does not occur with a Darlington configuration, since the output switch cannot saturate. If a non–Darlington
configuration is used, the following output drive condition is recommended.
MOTOROLA ANALOG IC DEVICE DATA
5
5 Page 
MC34063A MC33063A
NOTES
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MOTOROLA ANALOG IC DEVICE DATA
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet 33063AP.PDF ] | |
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