数据搜索系统,热门电子元器件搜索 |
|
ADP7183-EVALZ 数据表(PDF) 4 Page - Analog Devices |
|
ADP7183-EVALZ 数据表(HTML) 4 Page - Analog Devices |
4 / 9 page UG-795 ADP7183-EVALZ User Guide Rev. 0 | Page 4 of 9 VOLTAGE, REGULATION, AND CURRENT MESUREMENTS OUTPUT VOLTAGE MEASUREMENTS Figure 4 shows how the evaluation boards can be connected to a voltage source and a voltmeter for basic output voltage accuracy measurements. A resistor can be used as the load for the regulator. Ensure that the resistor has a power rating that is adequate to handle the power expected to dissipate across it. An electronic load can also be used as an alternative. Ensure that the voltage source can supply enough current for the expected load levels. Follow these steps to connect the evaluation boards to a voltage source and voltmeter: 1. Connect the positive terminal (+) of the voltage source to one of the GND pads on the evaluation boards. 2. Connect the negative terminal (−) of the voltage source to the VIN pad on the evaluation boards. 3. Connect a load between the VOUT pad and one of the GND pads on the evaluation boards. 4. Connect the positive terminal (+) of the voltmeter to the VOUT pad on the evaluation boards. 5. Connect the negative terminal (−) of the voltmeter to one of the GND pads on the evaluation boards. When these steps are completed, the voltage source can be turned on. If J1 is inserted (connecting EN to VIN for automatic startup), the regulator powers up. If the load current is large, the user must connect the voltmeter as close as possible to the output capacitor to reduce the effects of IR drops. DROPOUT VOLTAGE MEASUREMENTS Use the configuration shown in Figure 4 to measure the dropout voltage. The dropout voltage is defined as the input to output voltage differential when the input voltage is set to the nominal output voltage. The ADP7183 only enters dropout mode for output voltages of at least −2.5 V. For lower voltage outputs, the ADP7183 enters undervoltage lockout (UVLO) and shuts down. The dropout voltage increases with larger loads. For accurate measurements, use a second voltmeter to monitor the input voltage across the input capacitor. The input supply voltage may need adjusting to account for IR drops, especially when using large load currents. Figure 3 shows the typical curve of the dropout voltage measurements with different load currents. ILOAD (mA) –1000 –100 –10 –140 –120 –100 –80 –60 –40 –20 0 Figure 3. Dropout Voltage vs. Load Current (ILOAD,), VOUT = −3.3 V, TA = 25°C – + VOLTAGE SOURCE LOAD – + VOLTMETER –3.29999 V Figure 4. Output Voltage Measurement Setup |
类似零件编号 - ADP7183-EVALZ |
|
类似说明 - ADP7183-EVALZ |
|
|
链接网址 |
隐私政策 |
ALLDATASHEETCN.COM |
ALLDATASHEET是否为您带来帮助? [ DONATE ] |
关于 Alldatasheet | 广告服务 | 联系我们 | 隐私政策 | 链接交换 | 制造商名单 All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |