tween the slider of the control and feedback po-

tentiometer.

This resistor assures that in the case of input con-

trol or input feedback wire interruption the input

differential voltage will be within the NEUTRAL

ZONE and the motor position remains frozen.

The circuit features an overvoltage disable func-

18V, both outputs are forced to tristate in this con-

dition.

The thermal overload function disables the out-

puts (tristate) when the junction temperature in-

creases above the thermal shutdown threshold

temperature of min. 150

°C.

For the start of a heavy loaded motor, if the motor

current reaches the max. value it is necessary to

respect the dynamical thermal resistance junction

to ambient. The maximum output current is 0.8A.

The maximum junction temperature in this phase

should not increase above the thermal shutdown

threshold. In case of output disable due to ther-

mal overload the output remains disabled till the

junction temperature decreases under the thermal

enable threshold. This behaviour is assured with

the thermal shutdown hysteresis threshold , which

minimum value is 20

°C.

Figure 3, 5 and 7 show typical application dia-

grams for headlight adjustment applications. To

assure the safety of the circuits in the reverse bat-

necessary.

The input currents in this condition are limited by

limited to a value lower than absolute maximum

1.5V

0

1.5V

D95AT185A

Figure 4: Control to feedbacktransfer characteristic

for proportionalregulation with extended

D1

D2

PR

L9907N

INC

INF

GND

OUT C

OUT F

M

D95AT186

MODULE

Figure 5: RecommendedApplication Circuit Diagram with L9907N for proportional regulation with extended

=

Note:

Ω to 10KΩ. If themotor should not change its position, when

≤ 0.4V in this condition.

L9907N

5/8