High-frequency switching power supply test selection scheme

In the process of high-frequency switching power supply design, development, debugging and acceptance, many parameters need to be tested, which requires many measuring instruments and their accessories, such as probes, converters, computer interfaces, programming environments, etc. Now, some instruments with better performance-price ratio on the market are used as the instrument matching solutions for our future tests in these aspects. The following are some instrument models we have selected and their optional accessories, of course, as well as related functions that can be completed and some main technical indicators:

1. Oscilloscope

i. Oscilloscope is a commonly used instrument in our electronic design, but we usually use oscilloscope just to view the waveform, but with the development of electronic technology, the current digital fluorescent oscilloscope has many advanced use and measurement functions, and the indicators measured by the oscilloscope are relatively high by the existing standards. After being equipped with some voltage probes, current probes, etc., the measurement function is more powerful

ii. The commonly used models are

1. TDS3032B Digital fluorescent oscilloscope with built-in LAN port on the motherboard 52,500 yuan
Technical indicators: 300MHz analog bandwidth, 2.5Gs/s maximum sampling rate, 10K sample acquisition length, multi-language interface, color TFT VGA display, comes with 2 500MHz P6139 probes

2. TDS3052+TDS3EM Digital fluorescent oscilloscope with independent LAN port 69,500 yuan
Technical indicators: 300MHz analog bandwidth, 2.5Gs/s maximum sampling rate, 10K sample acquisition length, multi-language interface, color TFTVGA display, comes with 2 500MHz P6139 probes

iii. Common accessories and functions of oscilloscopes

2. Ripple voltmeter
Model: Taiwan Boji 4030 [RS232/GPIB] High-precision multifunctional ripple voltmeter
* Basic indicators 0.2, 2, 20MHz bandwidth, basic accuracy 1%
* Each group has good/bad (GO/NG) judgment
* The whole machine has PASS/FAIL judgment
* Four groups are displayed on the LCD at the same time
* Set before shutting down
3. Power analyzer
a) Taiwan Boji 4011A digital power meter with GPIB interface
b) V/A/W/PF display
c) 0.1% basic accuracy
4. High-power programmable DC electronic load
1. Taiwan Chroma 63312
a) 0~240A 1~80V modular electronic load, one frame can control up to 4 modules, and the maximum number of channels can be up to 8
b) It is recommended to use a frame with 2 high-power modules and 1~2 low-power modules
c) Load dynamic operating frequency up to 20KHz
2. Taiwan Boji's 3318 GPIB electronic load [single table] 60V120A1800W
3. Taiwan Boji's 3505 GPIB high-power electronic load [single table] 100V, 120A, 5KW
4. Taiwan Boji's 3510 GPIB high-power electronic load [single table] 100V, 240A, 10KW
5. High-precision benchtop multimeter
a) American Keithley 2001 benchtop multimeter,
i. 7 1/2 digit, high-precision benchtop multimeter
6. High-precision current shunt
a) Taiwan Boji's 7550 high-precision shunt
⊙ 0.01% high accuracy
⊙ 4.5-digit AC and DC current meter
⊙ Built-in overcurrent protection
⊙ Temperature coefficient is less than 10ppm/℃
⊙ High stability and
reliability Description: It has five sets of precise and stable shunts, namely 10Ω, 1Ω, 0.1Ω, 0.01Ω, and 0.001Ω. The measurement range is from 1uA