2. Actual requirements:
1.Package: VQFN package
2. Number of Pins: 38
3. Number of grounding connections: 9pin
4. Chip type: sIPM module
5. Testing requirements: chip functional testing and performance debugging
3. Demand analysis: IPM is the abbreviation of Integrated Power Module, that is, an integrated power component. The one we are talking about today is the sIPM component, which is a system integrated power component, that is, a chip that integrates power + system control. This chip is specially designed for PMSM motors and A driver chip designed for BLDC motors (PMSM motors are permanent magnet synchronous motors, and BLDC motors are brushless DC motors); this chip can also be applied to drives for air-conditioning fans and water pumps. This component chip integrates Arm architecture CPU, 16kb MTP Rom and SRAM with 4kB motor drive and contains I2C and UART interfaces, as well as gate drive circuit and IGBT saturation current of 800mA. This is a space-saving, more cost-effective power driver chip solution.
4. Production:
1. Design structure: It needs to be produced according to the size of the chip and the pad design of the chip. Due to the abnormal shape of the pad, when designing and planning, the drawings need to be strictly checked for relative position to confirm that the position of each probe is accurate;
2. The power supply of the chip. Since the driving chip is mainly a voltage driving signal, its voltage range must ensure probe matching;
3. Physical isolation between digital ground and analog ground. There should be a certain distance between the digital ground and the analog ground on the test socket. This should also be paid attention to when designing the PCB. If not paid attention to, there may be interference. The interference is mainly It is the interference of analog ground to digital ground, which has a great impact on the corresponding control part.
5. After production is completed, quality inspection will be conducted on all dimensions of the test seat, and each dimension marked on the drawing will be strictly inspected to confirm that it is correct before assembly; while assembling, the profiling design of the top pressure block will be carried out to confirm whether the design affects other parts. Components; after the overall confirmation is ok, it can be sent out
Motor drive SIPM component VQFN38 chip test socket
