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PDF AX2201 Data sheet ( Hoja de datos )
| Número de pieza | AX2201 | |
| Descripción | PWM Step-Down Controller | |
| Fabricantes | AXElite | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AX2201 (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
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AX2201
PWM Step-Down Controller
GENERAL DESCRIPTION
The AX2201 integrates Pulse-Width-Modulation (PWM) control circuit into a single
chip. These devise include a reference voltage source, oscillation circuit, error amplifier and
etc.
AX2201 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%.
An enable function, 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. Also,
an internal compensation block is built in to minimum external component count.
With the addition of an external P-channel Power MOS, a coil, capacitors, and a
diode connected externally, these components can function as step-down switching
regulators. They serve as ideal power supply units for portable devices when coupled with
the SOP-8L and MSOP-8L mini-package, providing such outstanding features as low
current consumption. Since this converter can accommodate an input voltage up to 24V, it
is also suitable for the operation via an AC adapter.
FEATURES
- Input voltage：3.6V to 23V
- Output voltage：0.25V to VCC
- LED backlight and high Power LED application
- Duty ratio：0% to 100% PWM control
- Oscillation frequency：330KHz.
- Current Limit (CL), Enable function.
- Thermal Shutdown function.
- Short Circuit Protect (SCP).
- External SW P-channel MOS.
- Low ESR output capacitor (Multi-layer chip capacitor (MLCC)) application.
- MSOP-8L and SOP-8L Pb-Free packages.
1/11
1 page  
AX2201
B. 1W/3W LED*1 for AC Input
AC
12V IN
AC D4
AC D3
AC D2
AC D1
C2 R4
100K
R5
100K
M1
PMOS
AP9435
1
L1
2
D1
B340
C8
4.7uF
U1
4 VCC GATE
3 NC
LX
2 COMP GND
1 EN
FB
5
6
7
8
D2 1N4148 R3 4.7K
Option
C9
1uF
LED
R2
LED
1W LED*1
3W LED*1
1W+1W LED
3W+3W LED
Recommend Operating Conditions
ILED R2 Inductor (L1)
350m 0.715Ω/0.125W
22uH
750m
900m
350m
750m
900m
0.333Ω/0.25W
0.278Ω/0.5W
0.715Ω/0.125W
0.333Ω/0.25W
0.278Ω/0.5W
22uH
22uH
15uH
15uH
15uH
Input Capacitor (C2)
220uF(EL)
330uF(EL)
470uF(EL)
330uF(EL)
820uF(EL)
1000uF(EL)
5/11
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.0 Jul.07, 2010
5 Page 
(2) MSOP-8L
AX2201
Symbol
Dimensions in Millimeters
Min. Nom. Max.
A - - 1.1
A1 0 0.08 0.15
A2
0.75 0.85
0.95
b
0.22 0.3
0.38
C
0.08 0.15
0.23
D 2.9 3 3.1
E 4.8 4.9 5
E1 2.9 3
3.1
e 0.65 BSC
L
0.4 0.6
0.8
y - - 0.1
θ 0º 4º 8º
JEDEC outline: MO-187 AA
Dimensions in Inches
Min. Nom. Max.
- - 0.043
0 0.003 0.006
0.03 0.033 0.037
0.009 0.012 0.015
0.003 0.006 0.009
0.114 0.118 0.122
0.189 0.193 0.197
0.114 0.118 0.122
0.026 BSC
0.016 0.024 0.031
- - 0.004
0º 4º 8º
11/11
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.0 Jul.07, 2010
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet AX2201.PDF ] | |
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