5 V, >2.5-A ，在开发板手册里有说明。
Not included: 5 V, >2.5-A supply brick with 2.1-mm barrel jack (center positive). TI recommends using an external power supply that complies with applicable regional safety standards such as UL, CSA, VDE, CCC, PSE, and so on. The cable length of the power cord must be < 3 m. www.ti.com/.../swru507c.pdf
