Texas Instruments LM5145EVM-HD-20A降压控制器EVM
Texas Instruments LM5145EVM-HD-20A降压控制器评估模块 (EVM) 旨在演示LM5145的性能。LM5145是一款性能卓越的同步降压直流-直流降压控制器，具有宽输入电压范围。该评估模块采用小尺寸封装，所需元件数量少。该模块在24V至72V宽输入电压范围内工作，可实现5V固定输出电压以及优于1%的设定值精度，电流高达20A。该评估模块的自由运行开关频率为220kHz，如有需要可同步到更高或更低频率。
特性
- 输入电压范围：24V至72V
- 经全面组装、测试和验证的PCB布局，总面积为30mm x 15mm
- 提供高达20A的负载电流
- 自由运行开关频率为2200kHz，并可在-20%至+50%范围内与外部时钟同步
- 5V输出电压，可在3.3V至8V范围内调节
必要设备
- Electronic Load
- The load should be an electronic constant-resistance (CR) or constant-current (CC) mode load capable of 0ADC to 20ADC at 5V
- For a no-load input current measurement, disconnect the electronic load as it may draw a small residual current
- Oscilloscope
- With the scope set to 20MHz bandwidth and AC coupling, measure the output voltage ripple directly across an output capacitor with a short ground lead normally provided with the scope probe
- Place the oscilloscope probe tip on the positive terminal of the output capacitor, holding the probe's ground barrel through the ground lead to the capacitor's negative terminal
- TI does not recommend using a long-leaded ground connection because this may induce additional noise given a large ground loop
- To measure other waveforms, adjust the oscilloscope as needed
- Voltage Source
- The input voltage source VIN should be a 0–72V variable DC source capable of supplying 10A
- Multimeters
- Voltmeter 1
- Input voltage at VIN to GND
- Set the voltmeter to an input impedance of 100MΩ
- Voltmeter 2
- Output voltage at VOUT to GND
- Set the voltmeter to an input impedance of 100MΩ
- Ammeter 1
- Input current
- Set the ammeter to a 1-second aperture time
- Ammeter 2
- Output current
- Set the ammeter to a 1-second aperture time
- Voltmeter 1
Board Setup
相关产品
Texas Instruments LM5145同步降压控制器
对会发生高压瞬变的高输入电压源或输入电源轨的电压进行调节。
发布日期: 2017-08-04
| 更新日期: 2025-03-05