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PDF MC34063 Data sheet ( Hoja de datos )
| Número de pieza | MC34063 | |
| Descripción | DC/DC CONVERTER CONTROL CIRCUIT | |
| Fabricantes | HOTCHIP | |
| Logotipo |  |
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MC34063
DC/DC CONVERTER CONTROL CIRCUIT
Description
The MC34063 is a monolithic
control circuit containing the primary
functions required for DC/DC converters.
The device consists of an internal
temperature compensated reference,
comparator, controlled duty cycle oscillator
with an active current limit circuit, driver
and high current output switch. This device
is specifically designed to be incorporated
in stepdown, step-up and voltage-inverting
applications with a minimum number of
external components. The ±2% internal
reference and low quiescent current of
1.6mA are among the improvements of the
device over the competition
Features
3V to 30V Input Voltage Operation.
Internal 1.2A Peak Current Switch.
Internal ±2% Reference.
Low Quiescent Current at 1.6mA.
Frequency Operation from 100Hz to
100KHz.
Low Dropout Operation: 100% Duty
Cycle
Current Limiting.
Standard SOP8/DIP8 Packages
Applications
DC-DC Converter Module
ADSL Modems
Hub.
Battery Chargers
Functional Diagram
Ver1.0
1
1 page  
Application Information
Design Formula Table
MC34063
VSAT = Saturation voltage of the output
switch.
VF = voltage drop of the ringback
rectifier
The following power supply
characteristics must be chosen:
VIN -Nominal input voltage.
VOUT -Desired output voltage,
|VOUT| =1.25 (1 + RB/RA)
lOUT - Desired output current.
FMIN - Minimum desired output switching
frequency at the selected values
for VIN and lOUT
VRIPPLE (P-P) - Desired peak-to-peak output
ripple voltage.In practice, the
calculated value will need to be
increased due to the capacitor
equivalent series resistance and
board layout. The ripple voltage
should be kept to a low value since
it will directly effect the line and
load regulation.
Ver1.0
5
5 Page 
MC34063
Copyright © 2008 by HOTCHIP TECHNOLOGY CO., LTD.
The information appearing in this Data Sheet is believed to be accurate at the time of
publication. However, HOTCHIP assumes no responsibility arising from the use of the
specifications described. The applications mentioned herein are used solely for the purpose
of illustration and HOTCHIP makes no warranty or representation that such applications will
be suitable without further modification, nor recommends the use of its products for
application that may present a risk to human life due to malfunction or otherwise.
HOTCHIP’s products are not authorized for use as critical components in life support
devices or systems. HOTCHIP reserves the right to alter its products without prior
notification. For the most up-to-date information, please visit our web site at
http://www.hotchip.net.cn.
Ver1.0
11
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet MC34063.PDF ] | |
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