Datasheet

- fast forward, by putting a resistor. In this
case it is necessary that also at the higher
speed for the duty cycle to be significately
less than 1 (see value of R
T
,C
T
on pin 2,
pin 3 sections).
Fig. 19 shows the functioncontrolled with a µP.
Pin 18
Right function control. The voltages applied to this
pin and to pin 19 determine the function, as
showed in the table.
The typical value of the threshold (L-H) is 1.2 V.
Pin 19
Left functioncontrol. (see pin 18 sect).
Pin 20
Right speed adjustment. (see pin 17 sect).
Figure 18.
Figure 19.
CONDITION
OUTPUT FUNCTION
OUTPUT VOLTAGE
Pin 18 Pin 19 Pin 12 Pin 9
L
H
L
H
L
L
H
H
STOP
LEFT
RIGHT
OPEN
LOW
LOW
REG
HIGH IMP.
LOW
REG
LOW
HIGH IMP.
Figure 20: Typical application.
TDA7272A
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