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发布者:微桥AX3112 发布时间:2011-1-21 阅读:6772次    关键字: AXELITE 亚瑟莱特 DC-DC 微桥 AX3112
AX3112A-PWM Control 3A Step-Down Converter


AX3112A-PWM Control 3A Step-Down ConverterDataSheet

AX3112 (AX3112-52Khz~380Khz Build in HV MOSFET 40V/2A + OCP/OVP ) High Efficiency solution For  5V/2A 5V/2.1A solution

Vin : 10V~40V
Vout : 5V/2A 5V/2.1A
* Freq=50Khz~380Khz adj
* Build 3A MOSFET. Efficiency 90% .
* Build in Line compensate +OCP+OVP function
* Supply CC / CV for Li-on battery charger mode
* EMI & TMC Approval available

GENERAL DESCRIPTION
    AX3112 consists of step-down switching regulator with PWM control. The device includes a reference voltage source, oscillation circuit, error amplifier, internal PMOS and etc.
    AX3112 provides low-ripple power, high efficiency, and excellent transient characteristics. The PWM control circuit is able to the duty ratio linearly forms 0 up to 100%. An enable function, an over current protect function and short circuit protect function are built outside that it can set by a resistance. 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-EP package, providing such outstanding features as low current consumption. Since this converter can accommodate an input voltage up to 38V, it is also suitable for the operation via an AC adapter.

FEATURES
- Input voltage:8V to 38V
- Adjustable version output voltage range form 3.3V to 38V
- Duty ratio:0% to 100% PWM control
- Oscillation frequency:130K/350 KHz
- Enable and auto restart control function.
- Thermal Shutdown function/Internal OVP.
- Short Circuit Protect (SCP).
- Built-in internal SW P-channel MOS.
- SOP-8L-EP Pb-Free package.

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