Test Procedure for the STK984-091AGEVB Evaluation Board [Supply Voltage] VB1 (8 to 18V): Power Supply for 3-phase motor & Driver IC Vcc (5V): Pull up Power Supply for DIAG1, DIAG2 [Operation Guide] 1. Motor Connection: Connect the motor to OUT U and OUT V and OUT W. 2. Power Supply: At first, supply DC voltage to VB. Next, supply DC voltage to Vcc. 3. Motor Operation Waveform example UT OUT U UT OUT U RESET SW ON RESET 12/30/2013 1 www.onsemi.com Heat radiation fin design ・120-degree energization ・PWM frequency:20kHz ・Phase change frequency:400Hz ・ON Duty:90% Io-Pd 18 16 14 Pd-W 12 10 8 6 4 2 0 0 5 10 15 20 25 Io-A Thermal resistance calculation formula for Heat sink is as follows: Rth= (Tc-Ta)/Pd 12/30/2013 2 www.onsemi.com