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L165_03 Datasheet, PDF (5/9 Pages) STMicroelectronics – 3A POWER OPERATIONAL AMPLIFIER
Figure 9. Bidirectional DC motor control with TTL/CMOS/µP compatible inputs.
L165
Must be VS2 ≥ VS1; E1, E2 = logic inputs; VS1 = logic supply voltage
Figure 10. Motor current control circuit with external power transistors (Imotor > 3.5A).
D1 to D4: VF ≤ 1.2 @ I = 4A
trr ≤ 500ns
Note : The inputvoltage level is compatible with L291 (5-BIT D/A converter).
The transfer function is: -I-M--- = -----R-----4--------
Vi Rx R3
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