njw4350 New Japan Radio Co.,Ltd, njw4350 Datasheet - Page 9

• Manufacturer Part Number: njw4350
• Description: Njw4350 Unipolar Stepper Motor Driver
• Manufacturer: New Japan Radio Co.,Ltd

(2) When VP is a negative voltage: VMM < VZ + Vd
The circuit configuration is that of Fig.16. In order to prevent a malfunction due to a negative voltage, be sure
to insert diodes in series with the phase output terminals.
It is recommended that you use Schottky diodes that have a small forward voltage for these diodes.
VMM
VMM
VMM
Fig.15 Zener diode and turn off circuit 2.
Fig.13 Zener diode and turn off circuit.
Fig.11 Diode and turn off circuit.
(case of zener diode)
Vd
Turn off circuit
VZ
i
i
VZ
VMM
Fig.16 Turn off negative voltage prevention circuit
VMM
VMM
Fig.14 Power regeneration and turn off circuit.
Negative voltage
prevention diode
by zener diode
Fig12 Resistor and turn off circuit.
R
(case of zener diode)
VZ
i
VZ
Turn off circuit
NJW4350
i
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