Four-in-one ESC 30.5mm version based on BLHeli_S firmware

This ESC uses open source firmware BLHeli_S, the firmware type is JH-30, and is also compatible with Bluejay firmware.
BLHeli_S firmware address: GitHub - bitdump/BLHeli: BLHeli for brushless ESC firmware
bluejay firmware address: GitHub - mathiasvr/bluejay: Digital ESC firmware for controlling brushless motors in multirotors
The burning tutorial and firmware are in the attachment, please pick it up yourself.
 
The hardware design of this ESC adopts a 4+6-layer board design,
of which the 4-layer board is a half-hole core board for the control part. The recommended board thickness is 1mm. Please note that when placing an order, please note that "no half-hole process is required, and it is produced according to the conventional process." Otherwise, free proofing may not be possible. At the same time, due to the free PCB process, there may be cases where the half holes of some boards are not secure. Please check whether the half holes are connected properly after receiving the board.
The 6-layer board is the high-current part of the MOS tube, the DC-DC power supply part and the current detection part. Due to the changes in the JLC proofing rules, the board cannot pass the review after being printed according to the rules, which means that one account can only type the 6-layer board once.
 
Regarding the question that many people may ask, "How many amps does this ESC have?" Since the ESC test environment requires at least thousands of watts of power supply and electronic load, if you want to know the overcurrent capability, I suggest you sponsor me. A powerful enough power supply and load. I have conducted a real aircraft flight test under 6S voltage conditions. The motors are four Chengfeng 2207 1950KV versions and the blades are 51466 blades.
 
Several points that need attention during production:
1. The main thing that needs attention is the selection of high-voltage components. The theoretical maximum input voltage of this ESC is 40V. To reserve a margin, it is recommended to be 3~8S. The TVS needs to be adjusted according to the input voltage. Select the type to avoid damage to the circuit caused by the back electromotive force caused when the motor decelerates. Secondly, the input filter capacitor needs to consider the voltage withstand capability (including DCDC input capacitance). I chose a 50V MLCC capacitor.
2. Due to the limitation of 30.5mm positioning holes, the metalized parts of the four positioning holes are one of the phases of the four ESCs. When using, you need to pay attention to put on the rubber shock pad for isolation. If you put the screws directly, it may cause damage. A short circuit is caused through the frame carbon plate.
3. The filter capacitor part I personally use is 1206 47uf 50V MLCC capacitor * 24 (yes, although I drew the 0805 package, I recommend you solder 1206). The total theoretical capacitance exceeds 1mf. I personally did not choose to add large capacity externally. Electrolytic capacitors, because too large a capacitance will lead to a more serious "fire" situation at the moment of power-on, and I personally do not agree with some people's "superstition" about capacitance and image transmission clarity. In suppressing It is the TVS rather than the capacitor that plays a greater role in the back electromotive force of the motor.
4. The current sampling resistor is drawn as a reverse polarity resistor of 1225. However, due to price reasons and overcurrent capabilities, I personally use 1206 1mΩ 1W*4 for parallel processing, which is equivalent to 0.25mΩ. The theoretical load carrying ratio is 1225 Power dissipation at higher resistive currents, in this case the BF ammeter section is set to 125.
5. Regarding the selection of MOS tubes, if you ask me, I will only recommend you 5c410. Just search for 5c410 MOS on a certain website. The disassembly chip is about one yuan each, and the estimated production cost is less than 100.
6. The control part is completed by SJJ. Due to the project version, the schematic diagram cannot be provided. If necessary, you can wait for him to open source to view it or go to my open source single circuit to investigate.
 
If you have any other production-related questions, please add Penguin 1919390681 and make certain remarks to contact me. Private messages may not be responded to in time because there is no direct reminder.