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PDF GS34063 Data sheet ( Hoja de datos )
| Número de pieza | GS34063 | |
| Descripción | DC-To-DC Converter Control Circuits | |
| Fabricantes | Globaltech Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de GS34063 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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DC-To-DC Converter Control Circuits
DEC. 2009
Product Description
The GS34063 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.
www.DataShTeheist4sUe.crioems was specifically designed to be
incorporated in Step-Down and step-Up and
Voltage-Inverting applications with a minimum
number of external components.
Features
Operation from 3.0V to 40V Input
Low Standby Current
Current Limiting
Output Switch Current to 1.5A
Output Voltage Adjustable
Frequency Operation to 100kHz
Precision 2% Reference
Applications
Battery Powered Applications
Laptop/Notebook Computers
Power Inverter (+ to -) or (- to +)
Medical Instruments
Interface Power Supplies
Portable Instruments
Cellular Phones/Radio
Block Diagram
VCC 6
Switch Collector 1
Driver Collector 8
Switch Emitter 2
Timing Capacitor 3
Ipk Sense 7
Comparator
Inverting Input
5
GND 4
SQ
Q2
R
100
Q1
CT
Ipk
Comparator
Oscillator
+
1.25V
Reference
- Regulator
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1 page  
Typical Performance Characteristics
1000
500
200
100
50
20
10
5.0
2.0
Vcc=5.0
Pin 7=Vcc
Pin 5= Gnd
TA =25
fon
foff
1.0
0.010.02 0.05 0.1 0.2 0.5 1.0 2.0 5.0 10.0
CT, OSCILLATOR TIMING CAPACITOR (nF)
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Figure 1.
Output Switch On-Off Time Versus Oscillator Timing
Capacitor
Vcc=5.0
Pin 7 =Vcc
Pin 2 =Gnd
Pins 1,5,8 =Open
CT =1.0nF
TA =25
10µs/DIV
Figure 2
Timing Capacitor Waveform.
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
0
Vcc =5.0V
Pin1, 7 ,8 =Vcc
Pins3, 5 =Gnd
TA =25
0.2 0.4 0.6 0.8 1.0 1.2 1.4
IE, EMITTER CURRENT (A)
1.6
Figure 3.
Emitter Follower Configuration Output Saturation
Voltage versus Emitter Current
360
340 Vcc=5.0
Ichg--Idischg
320
300
280
260
240
220
200
0
25
50 75
100
TA, AMBIENT TEMPERATURE(ºC)
Figure 5.
Current Limit Sense Voltage versus Temperature
1.2
1.0
Darlington Connection
0.8 Vcc =5.0V
Pin7=Vcc
0.6
Pins2, 3, 5=Gnd
0.4 TA=2.5℃
Forced =20
0.2
0 0.4 0.8 1.2 1.6
Ic, COLLECTOR CURRENT (A)
Figure 4.
Common Emitter Configuration Output Switch
Saturation Voltage versus Collector Current
4.0
3.6
3.2
2.8
2.4
2.0
1.6
1.2
0.8
0.4
00
CT=1.0nF
Pin 7 = VCC
Pin 2 =Gnd
5.0 10 15 20 25 30 35 40
Vcc, SUPPLY VOLTAGE (V)
Figure 6.
Standby Supply Current versus supply Voltage
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5
5 Page 
DIP-8 PLASTIC PACKAGE
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SYMBOL
A
A1
A2
B
B1
C
D
E
E1
e
L
E2
Dimensions
Millimeters
MIN MAX
3.710
4.310
0.510
-
3.200
3.600
0.380
0.570
1.524(BSC)
0.204
0.360
9.000
9.400
6.200
6.600
7.320
7.920
2.540(BSC)
3.000
3.600
8.400
9.000
Inches
MIN MAX
.146 .170
.020 -
.126 .142
.015 .022
0.060 (BSC)
.008 .014
.354 .370
.244 .260
.288 .312
.100 (BSC)
.118 .142
.331 .354
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| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet GS34063.PDF ] | |
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