Design a circuit and PCB for testing CN3082 battery charger IC
$30-250 CAD
Chiuso
Pubblicato più di 6 anni fa
$30-250 CAD
Pagato al completamento
We require an evaluation board to be designed to characterize the performance of a battery charger IC, the CN3082 from Consonance Electronics.
Design Requirements:
- Concurrent measurement of input and output voltages and currents, and voltage of temperature pin and charge status pin with resolution of 2 mV and 2 uA and accuracy of 5 mV and 5 uA, using an onboard multichannel ADC. To achieve the required accuracy, calibration trimmer pots may be added to the design.
- Use low-value current shunts and op-amp buffered voltage taps to minimize measurement disturbance of circuit under test.
- Measurement devices (op-amps, ADCs, etc.) will be powered separately and will communicate through an I2C bus to a off-board device through a standard pin header.
- Measurement devices must have suitable filtering as well as input protection so that they are not damaged if their power is disconnected while the device under test remains powered.
- CN3082 device under test will have headers for general input and output connections to the board, as well as a JST header for solar input connection to a 6V, 600 mA solar panel, and an SMD 18650 battery holder for output.
- Wherever possible, components should be chosen that are SMD, and are easy to hand assemble (at least 0.5mm pin pitch, 0603 - 0805 passives, etc.)
- Some specific devices may need to be utilized in the design, as we may have parts already on hand. More details will come.
Deliverables:
- Board schematic to be checked by our team so that any revisions can be made by us before going forward.
- List of which signals connected to which ADC channels, and conversion factors (in mV/count or uA/count).
- Bill of materials which shall consist of all parts required, and shall be readily available from suppliers such as Digikey and Mouser (with exception of CN3082 IC).
- Layout of a finished 2-layer board, with signals and components properly labeled, not larger than 100mm x 80mm.
- Finished Gerber files, ready for manufacture.
All design work must be done using KiCAD software.
This is testing board design project (based on CN082 datasheet or other docs), for charging.
Relevant Skills and Experience
I have experience on charging circuit design and I have used CN chip before.
Proposed Milestones
$500 CAD - Project completion upon discussion.
I am ready for the project. Thanks!
The current price and timescales are only place holders to allow me to communicate with you
If you think I can help then please send me further details
Best Regards
Dave Lelievre
Relevant Skills and Experience
I have over 35 years experience as an electronic design engineer, please see my profile.. I have worked in the ATE business for most of my working life and so have vast amount of experience
Proposed Milestones
$277 CAD - To be discussed
I am afraid I don't use KiCAD. However in all other aspects I have very relevant experience to your requirement.
Dear sir, I am a professional. I may be little costly. Please revert back to me if price fits your budget.
Relevant Skills and Experience
18 years
Proposed Milestones
$500 CAD - 1
i am interested in this project. please PVT me for more details.
i am in pcb design and fab industries last 12 years
Relevant Skills and Experience
PCB
Proposed Milestones
$222 CAD - one time
Hi
I have been designing pcbs for 4 years. I have experience designing circuits measuring voltages and currents with shunt resistors and boltage with op amp buffers.
I can help you with your pcb
Thanks
Design of 2 Layer .CN3082 test board including schematic capture, pcb layout, component library & footprint creation, generation of gerbers, drill files and BOM. Work to be done in KiCad
Relevant Skills and Experience
40 Years of circuit and PCB Design including but not limited to RF, Embedded Systems, Pulse Power, Industrial controls & switching power supplies. Have exclusively used KiCAD as main tool for 4 years
Proposed Milestones
$50 CAD - Task 1 - Consultation on design - 1 Hour @ $50/Hr
$150 CAD - Task 2 - Schematic Capture including component library creation as needed - 3 Hours @ $50/Hr
$250 CAD - Task 3 - PCB Layout including footprint creation as needed - 5 Hours @ $50/Hr
$50 CAD - Task 4 - Preparation of all deliverable design files - 1 Hour @ $50/Hr
Additional Services Offered
$50 CAD - Exludes PCB Fab, BOM
All work to be performed in Texas by Texans. We do similar kinds of projects and typically would use an 8 Ch 12 Bit I2C ADC such as TI ADC128D818 with a precision 3.0 V Ref for 3.3V systems such as the Microchip MCP1501-30. We mostly do STM32 ARM development and have some drivers written for this part. This provides theoretically .7mV/Step but taking noise into consideration we normally throw out 1-2 LSB - this would give you in the range of 1.5-3mV resolution reliably.
You indicate 5uA accuracy but don't indicate what the lowest current measurement will be. Minimally invasive low value shunts will quickly get into the noise
For lowest noise performance in RF sensing circuits we normally use low noise (20uV) LDOs on separate sections to isolate them from things like the I2C or other system noise. We can also provide shielded covers on parts of the circuit if required.
We have been doing LiPO battery charging and management systems from solar using components like the LT3652.
I have experience in designing solar charger. I have knowledge in MPPT for charger device from solar cell and how to make charger effective and remain time life of BAT.
Relevant Skills and Experience
- Knowledge in MPPT charge, PWM chagre , three state charge(CC, CV, recharge)..
- Experience in SCH/PCB design (include choose best cost components, clearly and best effective, control thermal).
Proposed Milestones
$50 CAD - SCH(Schematic and bomlist)
$50 CAD - PCB design(Gerberfile, pick an plave file) and PCBA
$66 CAD - Test functions