深圳市四海恒通科技有限公司 （非本站正式会员）

AX2003/A  3A,0.25V反馈电压，DC/DC降压型LED驱动IC

性能描述：  

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.

特点：

n  输入电压：3.6V to 23V

n  输出电压：0.25V to VCC

n  应用于LED背光和大功率LED

n  占空系数：0% to 100% PWM control

n  固定频率：AX2003: 330KHz typ.

                         AX2003A: 500KHz typ.

n  使能端具有开/关控制功能.

n  过电流保护，过热保护和短路保护.

n  内置开关P沟道MOS

n   Low ESR output capacitor (Multi-layer chip capacitor (MLCC)) application.高频低阻输出电容器（多层陶瓷电容）

n  SOP-8L无铅封装

AX2003应用产品：

    大功率手电筒，红外灯板，MR16射灯等LED照明产品