Functional description

L6219

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2.4

Single-pulse generator

The pulse generator is a monostable triggered on the positive going edge of the comparator

output. The monostable output is high during the pulse time, toff, which is determined by the

time components Rt and Ct.

The single pulse switches off the power feed to the motor winding, causing the winding

2.5

Output stage

The output stage contains four Darlington transistors (source drivers) four saturated

transistors (sink drivers) and eight diodes, connected in two H bridge.

Figure 4.

Principle operating sequence

The source transistors are used to switch the power supplied to the motor winding, thus

driving a constant current through the winding. It should be noted however, that is not

permitted to short circuit the outputs.