亚瑟莱特AX3XXX全系列车载电源方案可以满足DC-DC车充5V/1-3A的案子,终端产品囊括GPS,手机, 平板, Apple系列等中高端产品所需各方面的性能要求(短路保护,OTP,OCP ,OVP,限流保护,线性补偿,短路重启,关断等)及安规认证(FCC,TUV,CE传导干扰,E-MARK,TMC,OTA)对策.
AX3111为一颗设计耐压高达40V,电流3A的PWM降压芯片, IC内置MOS管,独特的开关频率可调设计,同等规格方案中设计效率高,在带来高效性能的同时也解决设计空间小的烦恼,满足市场主流的外观idea及安全规范测试要求! 产品内置过压,短路,过温保护&自动恢复等功能,外围线路简单,非常适合Mini Car Charger--1~2.1A方案,工作时效率可达90%,非常适合mini及双USB车充方案.
另外亚瑟莱特于最近推出AX3111之Cost Down版本---AX3133ESA,输入电压达32V,可直接替换原有芯片 , 使得方案更加有性价比!
AX3111-PWM Control 3A Step-Down Converter  DataSheet
AX3133-PWM Control 3A Step-Down Converter DataSheet
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AX3111-PWM Control 3A Step-Down Converter DataSheet
GENERAL DESCRIPTION
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 features 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.
FEATURES
- Input voltage：8V to 40V
- Output voltage：3.3V to 38V
- Duty ratio：0% to 100% PWM control
- Oscillation frequency range is 50K~350KHz by outside resistance setting
- Enable with Soft-Start function
- Current Limit, Short Circuit Protect (SCP) and Thermal Shutdown protection
- Built-in internal SW P-channel MOS.
- SOP-8L-EP and TDFN-10L Pb-Free packages.
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