NXP Semiconductors FRDM-HB2000-EVM, Руководство пользователя, Страница: 23 / 32

Installing the software and setting up the hardware
FRDM-HB2000-EVM evaluation board , Rev. 1.0
NXP Semiconductors 23
5.2.0.2 Parallel control
Figure 20. Parallel control description
Direction :
• Forward : Current flowing through OUT1 to OUT2
• Reverse : Current flowing through OUT2 to OUT1
Recirculation :
• High-side : Freewheel-High (both high-side FETs turned on) during PWMing
• Low-side : Freewheel-Low (both low-side FETs turned on) during PWMing (only valid for Half-Bridge mode)
ENBL :
• Yes : ENBL is logic HIGH, the H-Bridge is operational
• No : ENBL is logic LOW, the H-Bridge outputs are tri-stated and placed in sleep mode
DIS :
• DIS is logic HIGH, both OUT1 and OUT2 are tri-stated
• DIS is logic LOW, both OUT1 and OUT2 are enabled
PWM Freq :
• Enter PWM frequency up to 20000 Hz
Duty Cycle :
• Select PWM duty cycle from 10-90%
Start :
• After selection of parallel control configuration, press “ Start ” to activate the outputs
Stop :
• Press “ Stop ” to deactivate the outputs
Current Feedback :
• Shows current through the high-side FET using the current recopy feature
Status Fault :
• Shows any fault condition in sleep mode