National Instruments NI 9751 - Page 19

18 | ni.com | NI 9751 User Manual
Figure 16. DI Driver Simplified Schematic for Two Piezo Injectors
Internal Boost
Power Supply
Current Sense
& Comparator
Circuitry
High-Side,
High-Voltage
Switch
47 µH
Inductor
47 µH
Inductor
Short
+++
–––
Piezo
Injector 1
CH1
Low-Side
Switch
CH2
Low-Side
Switch
CH3
Low-Side
Switch
Piezo
Injector 2