3-channel 10A independent channel DC buck regulator chip BGA144 test socket (LTM series)
1. Actual requirements:
1.Package: BGA package
2.Pin number: 144pin
3. Spacing: 1.27mm
4. Chip type: three-way 10A step-down DC/DC module voltage regulator chip
5. Testing requirements: chip functional debugging, programming and mass production
2. Demand analysis: BGA144 is a relatively popular voltage regulator chip recently. Its function is DC/DC power supply function, with a total of 3 channels of output. The continuous current output of each channel is DC 10A. When its function is DC to DC, Convert the voltage from 4.7V to 16V into a voltage of 0.8V~5.5V (only Vout3 can reach 5.5V), releasing higher current and heat. Its chip size is 15*15*5.01mm and the pitch is 1.27mm.
3. Based on the performance requirements of the above chip, you also need to understand the multi-channel pin definition of the chip and confirm the number and distribution of its input and output pins. The chip test socket needs to match the multi-channel 10A current during use. For each The pin assignment of the channel is necessary to know, so as to assist in completing the corresponding test socket design: there are 3 pairs of Vin and Vout, that is, 6 groups of networks, Vin series single network 6Pin, Vout series Vout1 10Pin, Vout2-3 11Pin ;
In the process of power conversion, the main problem of chip heat dissipation is required, so the heat dissipation material of the top cover needs to be excellent to ensure the sustainability of the test;
The spacing between chips is large, which facilitates the design and processing of the pin plate and external structure of the test socket. Due to the size of the chip, the pressure of the test socket needs to be sufficient and the buckling force must be ok to avoid poor contact;
4. During the production process, each customized component is strictly inspected to confirm that the structure of the chip is within the allowable range. Only after all components are confirmed to be ok can they be assembled, and the overall inspection is completed before shipment.
