DRV8832 : 2.75-V to 6.8-V Operating Supply Voltage,1-A Maximum DC/RMS or Peak Drive Curren
1.根据这两句For example, if VREF is connected directly to VSET, the voltage will be regulated at 5.14 V. If the desired motor voltage is 3 V, VREF should be 0.75 V. This can be obtained with a voltage divider using 53 kΩ from VREF to VSET, and 75 kΩ from VSET to GND.这么说VREF=1.285V是固定输出?
2.如果整流电压输出最多只能到达5.14V,如果我的电机需求电压为6V的话,该如何解决?(提高电压输入到6V呢)
3.这句话Note that if the programmed output voltage is greater than the supply voltage, the device will operate at 100% duty cycle and the voltage regulation feature will be disabled.这个programmed output voltage怎样实现?
Wilson Zuo:
把Vset不要接Vref, 接一个更高的电压就好了。输出电压是4倍Vset和电源电压二者取其小
Song_xd:
回复 Wilson Zuo:
For example, if VREF is connected directly to VSET, the voltage will be regulated at 5.14 V。
这句话的意思是指VREF固定输出 = 5.14V,还是此状态下芯片 desired motor voltage = 5.14V?
因为我看见有人设计是VSET接电位器上,电位器两端电压是VREF和GND,这样的话就符合上述设计VSET=53K/(53K+75K) *5.14V = 0.75V。
但是如果是这样的话,假如VSET 分压后= 2V的话,那么desired motor voltage 会达到8V吗?