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参数资料
| 型号： | APE2902Y5R-49 |
| 厂商： | ADVANCED POWER ELECTRONICS CORP |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING REGULATOR, PDSO5 |
| 封装： | LEAD FREE, SOT-23, 5 PIN |
| 文件页数： | 4/8页 |
| 文件大小： | 346K |
| 代理商： | APE2902Y5R-49 |
Advanced Power
Electronics Corp.
APE2902
APPLICATION INFORMATION
Input/Output Capacitor Selection
Inductor Selection
Diode Selection
PCB layout guide
4
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 47F 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.
A 47H inductor is recommended for most APE2902 applications. However, the
inductance value is not critical, and the APE2902 will work with inductors in the 33H to
120H.
Schottky diodes with higher current ratings usually have lower forward voltage drop,
larger diode capacitance and fast reverse recovery, it is the ideal choices for APE2902
applications. The forward voltage drop of a Schottky diode represents the conduction
losses in the system, while the diode capacitance (CT or CD) represents the switching
losses. For diode selection, both forward voltage drop and diode capacitance need to be
considered.
When laying out the PC board, the following suggestions should be taken to ensure
proper operation of the APE2902. These items are also illustrated graphically in below.
1. The power traces, including the GND trace, the SW trace and the VIN trace should be
kept short, direct and wide to allow large current flow. Put enough multiply-layer pads
when they need to change the trace layer.
2. Do not trace signal line under inductor.
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相关代理商/技术参数 |
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|---|---|
| APE2902Y5R-50 | 制造商:A-POWER 制造商全称:Advanced Power Electronics Corp. 功能描述:MICROPOWER VFM STEP-UP DC/DC CONVERTER |
| APE2903 | 制造商:A-POWER 制造商全称:Advanced Power Electronics Corp. 功能描述:MICROPOWER VFM STEP-UP DC/DC CONVERTER |
| APE2903G-22 | 制造商:A-POWER 制造商全称:Advanced Power Electronics Corp. 功能描述:MICROPOWER VFM STEP-UP DC/DC CONVERTER |
| APE2903G-25 | 制造商:A-POWER 制造商全称:Advanced Power Electronics Corp. 功能描述:MICROPOWER VFM STEP-UP DC/DC CONVERTER |
| APE2903G-26 | 制造商:A-POWER 制造商全称:Advanced Power Electronics Corp. 功能描述:MICROPOWER VFM STEP-UP DC/DC CONVERTER |
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