We employ a zener diode to control spike voltages that occur when the transistor is turned OFF. The following figure shows and example of the drive circuit. With this circuit, we use a transistor equipped with a zener diode (zener voltage 60 +
TR1 | 2SD2041 (ROHM) |
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|
R1 | 1K Ω |
R2 | 330Ω |
VH | 23V + TR1 for VCE (sat) = 24 V |
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HV (24 V)
Fig. 3-11 Example of Print Solenoid Drive Circuit
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