TDA7272A データシートの表示（PDF） - STMicroelectronics
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TDA7272A Datasheet PDF : 16 Pages
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- 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 RT, CT on pin 2,
pin 3 sections).
Fig. 19 shows the function controlled with a µP.
Figure 18.
Figure 19.
TDA7272A
The typical value of the threshold (L-H) is 1.2 V.
Pin 18
Right function control. The voltages applied to this
pin and to pin 19 determine the function, as
showed in the table.
Pin 19
Left function control. (see pin 18 sect).
Pin 20
Right speed adjustment. (see pin 17 sect).
CONDITION
Pin 18 Pin 19
L
L
H
L
L
H
H
H
OUTPUT FUNCTION
STOP
LEFT
RIGHT
OPEN
OUTPUT VOLTAGE
Pin 12
Pin 9
LOW
LOW
LOW
REG
REG
LOW
HIGH IMP. HIGH IMP.
Figure 20: Typical application.
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