|
|
PDF AX5103A Data sheet ( Hoja de datos )
| Número de pieza | AX5103A | |
| Descripción | Step-up PWM DC/DC Converter | |
| Fabricantes | AXElite | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de AX5103A (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
|
No Preview Available !
AX5103A
Step-up PWM DC/DC Converter
GENERAL DESCRIPTION
The AX5103A is high efficient step-up DC/DC converter. Large output current is
possible having a built in internal N channel MOSFET, and using an external coil and diode.
The AX5103A can be operated at switching frequencies of 500kHz allowing for easy
filtering and low noise, the size of the external components can be reduced.
Output voltage is programmable with 1.0V of standard voltage supply internal, and
using externally connected components, output voltage (FB) can be set up at will.
This converter also contains an error amplifier circuit as well as a soft-start circuit that
prevents inrush-current at startup. The thermal shutdown function is built inside.
FEATURES
- Input voltage: 3.6V to 23V
- Output voltage: 4.0 V to 58V (±2.5%)
- Duty ratio: 0% to 80% PWM control
- Switch current: 3A(MAX)
- Oscillation frequency: 500KHz.
- Soft-start function
- Thermal Shutdown function
- Built-in internal SW N-channel MOS
- SOP-8L Pb-Free Package.
BLOCK DIAGRAM
Vcc
Phase
FB Compensation
+
+
-
-
Vref
PWM
Controller
Oscillator
Thermal
Shutdown
Buffer
Driver
SW
Vss
SGND
1/8
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.1 Aug.09, 2010
1 page  
0755-8398 3377 135 9011 2223
http://www.gofotech.com
AX5103A
FUNCTION DESCRIPTIONS
PWM Control
The AX5103A consists of DC/DC converters that employ a pulse-width modulation
(PWM) system.
In converters of the AX5103A, the pulse width varies in a range from 0 to 80%,
according to the load current. The ripple voltage produced by the switching can easily be
removed through a filter because the switching frequency remains constant. Therefore, these
converters provide a low-ripple power over broad ranges of input voltage and load current.
Setting the Output Voltage
Application circuit item shows the basic application circuit with AX5103A adjustable
output version. The external resistor sets the output voltage according to the following
equation:
V OUT
=
1.0V
× ⎜⎛1 +
⎝
R1 ⎟⎞
R2 ⎠
Output Voltage Ripple
Application circuit item shows the basic application circuit with AX5103A. The output
voltage ripple (VRIPPLE) very lager at high switch current(ISW=3A, VRIPPLE≒0.7V), external π
filters can reduce output voltage ripple or add MLCC 22uF at output(see next page for output
ripple wave):
a. π filters
VCC=6V
L1
15uH
D1
B340A
Vout=+12V
L2
2.2uH
C3 C4
470uF 0.1uF
U1
1 SGND
2 Vcc
3 Vcc
4 FB
Vss
Vss
SW
SW
AX5103A
8
7
6
5
R1
11K
C5
470uF
R2
1K
C6
0.1u
C8 C9
330uF 0.1u
5/8
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.1 Aug.09, 2010
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet AX5103A.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| AX5103A | Step-up PWM DC/DC Converter | AXElite |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |