Detailed introduction:
This design is suitable for powering servos on fixed-wing aircraft models. The default switching frequency is 430kHZ (taking into account both volume and efficiency)
Temperature test data:
1) Room temperature 30 degrees
2) The temperature is the upper MOS tube temperature (higher than other chips)
3) Input 24~23V
4) Output 5.10V
5) Use double-sided heat sinks when testing, as shown in the cover picture
In the case of pure passive cooling:
12A overcurrent protection
9A 100s temperature 120 degrees
8A 170s temperature 120 degrees
7A 240s temperature 120 degrees
6A continuous, temperature 110 degrees
When a small fan simulates air ventilation and heat dissipation:
10A continuous, temperature 70 degrees (no pressure)
Ripple test data:
No current output: 70mV
At 10A output: 170mV
The intermediate change is almost linear, and the effect of ripple can be further reduced by connecting a solid capacitor in parallel at the output end.
Chip purchase details:
Chip name |
type |
Purchase link | quantity |
LM3150 |
controller |
https://m.tb.cn/h.fCZdx2s?tk=8bI02IWOjae | 1 |
CSD18504 | MOS tube | https://m.tb.cn/h.fCZWK0E?tk=vccA2IWOZBe | 2 |
1210 2.2uH | inductance | https://m.tb.cn/h.fyEtjsx?tk=JyQf2IWN8ZE | 1 |
1206 10uF 50V | Input chip capacitor | https://m.tb.cn/h.fCZeCJO?tk=xy6T2IWNDlQ | 5 |
1206 47uF 10V | Output chip capacitor | https://m.tb.cn/h.fBDVm7s?tk=RDkg2IWnpUr | 15 |
6.3*12 | Input direct plug capacitor high frequency | https://m.tb.cn/h.fyEuwoD?tk=z43w2IWMgp4 | 1 |
8*12 680 uF 16V | Output direct plug capacitor high frequency | https://m.tb.cn/h.fCCH0m1?tk=3Q9i2IWMciO | 1 |
In addition to the above devices and RV resistors, please purchase other resistors and capacitors at Uxin Electronics according to the 'nominal value'
The output voltage can be set by changing the RV resistance and inductance for use by the HV servo ( when the voltage output increases, the module will heat up more seriously )
RV | inductance | VOUT |
73.2k | 2.2uH | 5.1V |
93.1k | 3.3uH | 6.2V |
107k | 3.3uH | 7V |
Soldering tips, it is easy to solder the resistors and capacitors of the 0402 package using solder paste and a heating table.
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