3/26/2012 1 www.onsemi.com sanyo semiconductors test procedure for the l v8804fvgevb evaluation board table: required equipment equipment e fficiency power supply 1 2 v - 1 a function generator dc 0 - v reg oscilloscope 4 channel current probe l v8804f v evaluation board motor 12v - 3w power supply output probe input current probe amplifier 1 function generater fan motor osc i lloscope
3/26/2012 2 www.onsemi.com sanyo semiconductors test procedure: 1. c onnect the test setup as shown above. 2 . initial check boot up at the vcc = 12 v . ctl=0v(pwm 100%) confirm that the motor rotates smoothly and in a right direction. switch the fr switch when the motor rotation direction defferent. 3 . booting check (startu p - mode) check whether a booting of a motor is stable. (booting) boot up at the vcc = 6 v and 1 2 v . when ctl voltage vary from 0v to 4v , check to chamge the mot or rotation speed. a nd t hen, at each vcc and ctl voltage check whether a motor boots 100 times in 100times. check the some waveforms. (booting waveforms) boot up at the vcc =12v. check the wo, vo and fg voltage waveform at scope ch1, ch2 and ch3, and the output current waveform of wo at scope ch4 by the osc i lloscope. ex) these waveforms are different by each motor. turn on the power supply startup - mode uo 5v/div fg 5 v/div current of uo 1 a/div t=0.5s/div
3/26/2012 3 www.onsemi.com sanyo semiconductors 4. normal rotation check (regular - rotation - mode) check the some waveforms. (rotation waveforms) supply the vcc=12v. check the wo , vo and fg voltage waveform at scope ch1, ch2 and ch3, and the output current wav eform of wo at scope ch4 by the osc i lloscope. ex) these waveforms are different by each motor. regular - rotation - mode t=2ms/div uo 5v/div fg 5 v/div current of uo 1 a/ div
3/26/2012 4 www.onsemi.com sanyo semiconductors 5 . lock detection check (motor - lock - mode) check the lock detection behavior. (lock) supply the vcc=12v. c heck the signal of w o, vo and uo is off when s top the motor by your hand forcibly . then, check the wo, vo and fg voltage waveform at scope ch1, ch2 and ch3, and the output current waveform of wo at scope ch4 by the osc i lloscope. ex) these waveforms are different by each moto r. 6 . checking r esult a sample of checking result is shown below. vcc ctl voltage booting r otation speed (rpm) rotation waveform s io lock 12v 0v 100/100 ok - ok value ok 1.5v 100/100 ok - ok value ok 2. 5v 100/100 ok - ok value o k 6 v 0v 100/100 ok - ok value ok 1.5v 100/100 ok - ok value ok 2. 5v 100/100 ok - ok value ok motor - lock - mode t= 0.5 s/div uo 5v/div fg 5 v/div current of uo 1 a/div the motor is stopped
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