深圳市四海恒通科技有限公司 （非本站正式会员）

AX3111  3A PWM 控制降压型转换器

AX3111性能描述

      AX3111 consists of step-down switching regulator with PWM control. These devise  include a reference voltage source, oscillation circuit, error amplifier, internal PMOS and etc.

       AX3111 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. The operating frequency is decided by outside resistance. 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-8L with exposed pad and TDFN-10L packages, providing such outstanding  as low current consumption. Since this converter can accommodate an input voltage up to 40V, it is also suitable for the operation via an AC adapter.

 特 点

l  输入电压范围：8V to 40V

l  输出电压范围：3.3V to 38V

l  占空系数：0% to 100% PWM control

l  Oscillation frequency range is 50K~350KHz by outside resistance setting

l  具有软启动功能

l  过流保护，短路保护和过热保护

l  内置开关P沟道MOS

l  提供SOP-8L-EP 和 PDIP-8L 无铅封装