Mounting hole 20 BLHeli_S firmware 4-in-1 through electromechanical adjustment

The description

is written at the front:
This document was designed without using GBA pad design, so free 6-layer board prototyping will not be available in the future, please be informed.
Only for personal use and not for commercial use.
You can choose your own welding after placing an order. You can choose Jialichuang SMT or weld it yourself. If you weld it yourself, please try to use steel mesh welding, because most RC packages are 0201, and hand welding is difficult.
 
Note: All devices in the BOM are not irreplaceable and can be replaced with products of the same specifications. It is worth noting that MOS needs to be packaged in 3*3 and cannot be packaged in 3.3*3.3. The withstand voltage value needs to be considered when selecting. and continuous current. When replacing capacitors, you need to pay attention to the withstand voltage value. The 0805 22UF capacitor must have a withstand voltage of 35V.
The 0603 4.7uf capacitor must have a withstand voltage of 50V. Other capacitors must have a at least 16V withstand voltage. ZVS transient suppression diode needs to pay attention to the clamping voltage and reverse cut-off voltage. It mainly depends on how much voltage you use for power supply
 
. Introduction: With 8v BEC, and ammeter, continuous current 15A, 3-6S lithium battery driving voltage and input voltage isolation design, The maximum voltage that can be input is 30V. Note: Extreme voltage, not recommended. 4-in-1 brushless ESC. 6-layer board design,
if you need high current, please increase the copper thickness by yourself, because the main over-current capacity is on the 2-3-4-5 layer. According to Jialichuang free rules, the inner copper thickness is 0.5oz.
 
1. Product introduction:
The installation position of this four-in-one ESC is a standard 20-hole design, which can be used to install shock-absorbing rubber balls. Note that the 4 holes have windows for each of the 4-way ESCs. Pay attention to insulation and reduce installation. Just vibrate the rubber ball and use EFM8BB21F16G to drive FD6288Q. ·
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2. Application scenarios:
Mainly used in small 4-axis drones.
3. Product overview
The design of this 4-in-1 ESC is relatively compact, and the package adopts 0201. It is difficult to weld manually. I did it for verification in the early stage. It took several pieces to be soldered before one was successful. After passing the verification, it was proved that there was no problem with the circuit design layout.
Opening a steel mesh later can reduce the fault tolerance rate. It is strongly recommended to use a steel mesh, which is simple and saves trouble, because the 0201 package pad is too small and cannot be tinned.
4. Product parameters:
1 Working voltage: Use lithium battery or DC power supply. The maximum support is 6S battery power supply. If you use 6S power supply, you need to pay attention to the selection of voltage-resistant devices, DC11.7-25.2v (maximum voltage-resistant MOS tube of 30v Withstand voltage value)
2 Power consumption: This depends on how you use it. If the voltage is different and the current is different, the power consumption will be different. I won’t go into details.
3 The ESC can last 15A*4 channels (maximum instantaneous 20A *4 channels). If you need high current, please Increase the copper thickness by
4. Module size: 29*30*1.6. Unit: MM board thickness. Jialichuang defaults to 1.6, 6-layer PCB design
5. For burning instructions,
please use the C2 downloader or arduino nano after compiling it into the C2 downloader. It is burned with the BLHeliSuite parameter adjustment software. The software is too large to be uploaded. Please search and download it yourself.