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AX2201

AXElite
Part Number AX2201
Manufacturer AXElite
Description PWM Step-Down Controller
Published Jul 17, 2014
Detailed Description AX2201 PWM Step-Down Controller  GENERAL DESCRIPTION The AX2201 integrates Pulse-Width-Modulation (PWM) control circui...
Datasheet PDF File AX2201 PDF File

AX2201
AX2201

Overview
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.
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co m 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 AX2201  BLOCK DIAGRAM LX Oscillation Circuit Vcc Reference Voltage GATE PWM - Switched Control Circuit + - FB Vss Thermal Shutdown VEN EN COMP  PIN ASSIGNMET These packages of AX2201 are MSOP-8L and SOP-8L; the pin assignment is given by: Name Description FB Feedback pin ( Top View ) Shutdown Control Input.
EN H：normal operation(Step-down) FB 8 EN 1 L：Shutdown mode Comp 2 7 Vss Comp C...


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