L6219R 查看數據表（PDF） - STMicroelectronics

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L6219R

STEPPER MOTOR DRIVER

STMicroelectronics 

L6219R

Figure 5. Principle Operating Sequence

The source transistors are used to switch the power supplied to the motor winding, thus driving a constant cur-

rent through the winding.It should be noted however, that is not permitted to short circuit the outputs.

Internal circuitry is added in order to increase the accuracy of the motor current particularly with low current lev-

els.

3.6 VS, VSS, VRef

The circuit will stand any order of turn-on or turn-off the supply voltages VS and VSS. Normal dV/dt values are

then assumed.

Preferably, VRef should be tracking VSS during power-on and power-off if VS is established.

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