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PDF AX3163 Data sheet ( Hoja de datos )
| Número de pieza | AX3163 | |
| Descripción | PWM Control 3A Step-Down Converter | |
| Fabricantes | AXElite | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AX3163 (archivo pdf) en la parte inferior de esta página. Total 10 Páginas | ||
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AX3163
PWM Control 3A Step-Down Converter
GENERAL DESCRIPTION
AX3163/A consists of step-down switching regulator with PWM control. These devise
include a reference voltage source, oscillation circuit, error amplifier, internal PMOS and
etc.
AX3163/A provides low-ripple power, high efficiency, and excellent transient
characteristics. The PWM control circuit is able to the duty ratio linearly form 0 up to 100%.
This converter is build out soft start function that prevents overshoot and inrush current at
startup. An over current protect function and short circuit protect function are built inside,
and when OCP or SCP happens, the operation frequency will be reduced. An external
compensation is easily to system stable; the low ESR output capacitor can be used.
With the addition of an internal P-channel Power MOS, a coil, capacitors, and a diode
connected externally, these ICs can function as step-down switching regulators. They serve
as ideal power supply units for portable devices when coupled with the SOP-16L with
exposed pad package, providing such outstanding features as low current consumption.
Since this converter can accommodate an input voltage up to 58V, it is also suitable for the
operation via an AC adapter.
FEATURES
- Input voltage：10.8V to 58V
- Output voltage：3.3V to 56V
- Duty ratio：0% to 100% PWM control
- Enable and Soft-Start function
- Current Limit, Short Circuit Protect (SCP) and Thermal Shutdown protection
- Built-in internal SW P-channel MOS.
- SOP-16L-EP Pb-Free package.
1/10
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.1 Dec.13, 2011
1 page  
AX3163
APPLICATION CIRCUIT
VIN=10V~58V
JH1
1
1
HEADER 1
R2
100K
C2
1uF
C3
470uF
C4
0.1uF
C7
0.1uF
C8
0.1uF
JH3
1
1
HEADER 1
C9
0.1uF
U3
5
VCC
6 VCC
4
VGATE
2 EN
1 SS
3 VSS
7
NC
8 NC
AX3163_3
11
SW
SW 10
13
FB
COMP 14
NC 9
NC 12
15
NC
NC 16
L1
D1
B360
R3
C10
R1
VOUT = VFB x (1 +
)
R5
VFB = 1.0V ; R5 suggest 0.8K ~ 3K
VOUT=5V/2A
JH2
1
1
HEADER 1
C1
R1
4K
C5 C6
0.1uF
470uF
R5
1K
JH4
1
1
HEADER 1
COUT ESR Range
30m~80mΩ
80m~300mΩ
EL Capacitor Compensation Table
FREQ
VOUT
R3
100KHz
250KHz
100KHz
250KHz
1K
5V
2.2K
1K
2.2K
C10 C1
47nF 2200pF
47nF 560pF
47nF 2200pF
47nF 470pF
L1
68uH
33uH
68uH
33uH
FUNCTION DESCRIPTIONS
EN
This pin can be supplied shutdown function. It is inside pull high function. Allow the
switching regulator circuit to be shutdown pulling this pin below a 0.8V threshold voltage.
SS
This pin can be supplied soft start function. The pin must be connected a capacitor to
ground. There is a 10uA current to charge this capacitor, vary the different capacitor value
to control soft start time.
COMP
Compensation pin. For EL output capacitor application, the COMP pin connects R3
and C10 to ground for all condition; please refer the compensation table.
5/10
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.1 Dec.13, 2011
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet AX3163.PDF ] | |
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