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APE2901G-43 PDF预览

APE2901G-43

更新时间： 2024-02-29 10:00:15
品牌 Logo 应用领域
富鼎先进 - A-POWER 转换器稳压器开关式稳压器或控制器电源电路开关式控制器
页数 文件大小 规格书
10页 371K
描述
MICROPOWER VFM STEP-UP DC/DC Converter

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APE2901G-43 技术参数

生命周期：Contact Manufacturer零件包装代码：SOT-89
包装说明：,针数：3
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.65
Is Samacsys：N模拟集成电路 - 其他类型：SWITCHING REGULATOR
标称输入电压：1.8 VJESD-30 代码：R-PSSO-F3
长度：4.5 mm功能数量：1
端子数量：3标称输出电压：4.3 V
封装主体材料：PLASTIC/EPOXY封装形状：RECTANGULAR
封装形式：SMALL OUTLINE认证状态：Not Qualified
座面最大高度：1.6 mm表面贴装：YES
切换器配置：BOOST最大切换频率：150 kHz
端子形式：FLAT端子节距：1.5 mm
端子位置：SINGLE宽度：2.5 mm
Base Number Matches：1

APE2901G-43 数据手册

 浏览型号APE2901G-43的Datasheet PDF文件第1页浏览型号APE2901G-43的Datasheet PDF文件第2页浏览型号APE2901G-43的Datasheet PDF文件第4页浏览型号APE2901G-43的Datasheet PDF文件第5页浏览型号APE2901G-43的Datasheet PDF文件第6页浏览型号APE2901G-43的Datasheet PDF文件第7页 
Advanced Power  
Electronics Corp.  
APE2901  
BLOCK DIAGRAM  
OUT  
SW  
VREF  
LIMITER AMP.  
VFM  
CONTROL  
ERROR AMP.  
Driver  
GND  
OPERATION  
The APE2901 architecture is built around a VFM CONTROL logic core, switching  
frequency is set through a built in oscillator. TON time is fixed (Typ. 5uS) while TOFF time  
is determined by the error amplifier output, a logic signal coming from the comparison  
made by the Error Amplifier Stage between the signal coming from the output voltage  
divider network and the internal Band-Gap voltage reference (Vref). TOFF reaches a  
minimum (Typ. 1.7uS) when heavy load conditions are met (Clock frequency 150KHz). An  
over current conditions, through the internal power switch, causes a voltage drop  
VLX=RDSON x ISW and the VLX limiter block forces the internal switch to be off, so narrowing  
TON time and limiting internal power dissipation. In this case the switching frequency may  
be higher than the 150KHz set by the internal clock generator.  
VFM control ensures very low quiescent current and high conversion efficiency even  
with very light loads. Since the Output Voltage pin is also used as the device Supply  
Voltage, the versions with higher output voltage present an higher internal supply voltage  
that results in lower power switch RDSON, slightly greater output power and higher  
efficiency. Moreover, bootstrapping allows the input voltage to sag to 0.6V (at IOUT=1mA)  
once the system is started. If the input voltage exceeds the output voltage, the output will  
follow the input, however, the input or output voltage must not be forced above 5.5V.  
APPLICATION INFORMATION  
INPUT/OUTPUT CAPACITOR SELECTION  
The Output Ripple Voltage, as well as the Efficiency, is strictly related to the behavior  
of these elements. The output ripple voltage is the product of the peak inductor current  
and the output capacitor Equivalent Series Resistance (ESR). Best performances are  
obtained with good high frequency characteristics capacitors and low ESR. The best  
compromise for the value of the Output Capacitance is 47µF Tantalum Capacitor; Lower  
values may cause higher Output Ripple Voltage and lower Efficiency without  
compromising the functionality of the device.  
An Input Capacitor is required to compensate, if present, the series impedance between  
the Supply Voltage Source and the Input Voltage of the Application.  
INDUCTOR SELECTION  
A 47µH inductor is recommended for most APE2901 applications. However, the  
inductance value is not critical, and the APE2901 will work with inductors in the 33µH to  
120µH.  
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与APE2901G-43相关器件

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APE2901G-46 A-POWER MICROPOWER VFM STEP-UP DC/DC Converter

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APE2901G-47 A-POWER MICROPOWER VFM STEP-UP DC/DC Converter

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APE2901G-48 A-POWER MICROPOWER VFM STEP-UP DC/DC Converter

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