Overview
The LB1668 Series are 2-phase unipolar drive brushless motor drivers that feature a wide usable voltage range and a minimal number of required external components. They also support the formation of motor lock protection and automatic recovery circuits.
Functions and Features
⢠Output protection Zener diodes with variable breakdown
voltages
â When the Z1 and Z2 pins are open: VOLM = 57 V
â When the Z1 and Z2 pins are shorted: VOLM = 32 V
â An external Zener diode can be connected between
Z1 and VCC.
⢠Can support both 12-V and 24-V power supplies by
changing an external resistor.
⢠Hall elements can be connected directly.
⢠1.5-A output current output transistors built in
⢠Built-in rotation detection function that outputs low
when driven and high when stopped (LB1668/M)
⢠FG signal function that sets FG high when IN- is low,
and sets FG low when IN- is high (LB1667/M)
⢠Motor lock protection and automatic recovery functions
built in
⢠Thermal shutdown function
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