AX2003 반도체 회로 부품 판매점
0.25V Feedback Voltage Step-Down Switching Regulators
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 AXElite |
AX2003/A
3A, 0.25V Feedback Voltage Step-Down
Switching Regulators for LED Driver
GENERAL DESCRIPTION
AX2003/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.
AX2003/A provides low-ripple power, high efficiency, and excellent transient
characteristics. The PWM control circuit is able to the duty ratio linearly from 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 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-8L package, providing such outstanding features as low current consumption.
Since this converter can accommodate an input voltage up to 23V, 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：
AX2003 : 330KHz typ.
AX2003A: 500KHz typ.
- Enable/Disable function.
- Current Limit (CL), Thermal Shutdown and Short Circuit Protections (SCP).
- Built-in internal SW P-channel MOS.
- Low ESR output capacitor (Multi-layer chip capacitor (MLCC)) application.
- SOP-8L Pb-Free package.
1/8
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.3 Feb.16, 2009
www.DataSheet.in
LED Driver (3A, 0.25V FB Voltage) AX2003
Block Diagram
SW
Vcc
Thermal
Shutdown
Oscillator
Circuit
Reference Voltage
PWM Switched
Control Circuit
+
-
Current
VEN Limit
FB
Vss
EN Comp
PIN ASSIGNMET
The package of AX2003/A is SOP-8L; the pin assignment is given by:
( Top View )
FB 1
EN
Comp
2
3
Vcc 4
AX2003/A
SOP-8L
8 Vss
7 Vss
6 SW
5 SW
Name
FB
EN
Comp
VCC
SW
VSS
Description
Feedback pin
Power-off pin
H：normal operation(Step-down)
L：Step-down operation stopped
(All circuits deactivated)
Compensation pin
IC power supply pin
Switch pin. Connect external
inductor/diode here.
GND pin
ORDER/MARKING INFORMATION
Order Information
AX2003 X X X
Frequecny
Package Type Packing
Blank : 330KHz S: SOP-8L Blank : Tube
A : 500KHz
A : Taping
Top Marking
Logo AX 2003
AXXXXX
AX2003A
Part number
ID code: internal
WW: 01~52
Year : 08 = 2008
2/8
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.3 Feb.16, 2009
www.DataSheet.in
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제조업체: AXElite
( axelite )
AX2003 regulator
데이터시트 다운로드 :
[ AX2003.PDF ]
[ AX2003 다른 제조사 검색 ]
국내 전력반도체 판매점
상호 : 아이지 인터내셔날
전화번호 : 051-319-2877
[ 홈페이지 ]
IGBT, TR 모듈, SCR, 다이오드모듈, 각종 전력 휴즈
( IYXS, Powerex, Toshiba, Fuji, Bussmann, Eaton )
전력반도체 문의 : 010-3582-2743
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