IL9010N
IL9010N IC. When current flows through load (commutator electric motor) voltage on R17
resistor drops, and, in case when load current exceeds particular value, voltage drop on R17
resistor exceeds threshold value for actuation of protective circuit against load current
exceeding.
Protective circuit provides function of load protection by the way of basis circuit disconnection
(communicator electric motor circuit), and as a result switching pulses do not come from IC output
(pin 04) to triac controlling electrode and triac load is not connected to AC line.
Protective circuit provides control of load current value in both half-periods of AC supply line
voltage, electric motor and IL9010N IC obtain power supply. VD1 line, output 13 provides
protection by load current exceeding in positive half-period of supply line voltage: due to increasing
of potential differences on VD1 diode up to diode opening voltage, occurs current derivation from
resistor voltage devider R5, R6 at supporting comparator shoulder (output 13), that results in
reference voltage drop at given output, less than voltage on second comparator shoulder (output
14) and comparator switching.
Voltage comparator blocks supply voltage tracing circuit (transfer it to the “DISABLED” state)
and disconnects the IC.
R1, VD2 line, output 14 provides protection by load voltage exceeding in negative half-period of
net voltage: due to potential rising on R1 resistor and VD1 diode up to diode VD1 discover, occurs
current derivation to resistance divider R2, R3, R4 at signal comparator shoulder (output 14), that
causes increasing of output 14 potential and, by definite value of derived current, occurs
comparator switching and IC disconnection.
R7, VD3 line provide hysteresis between voltage comparator connection and disconnection level.
IC power supply is implementing directly from AC line through half-wave rectifier and ballast
resistor (fig. 1). Rated zero-power resistance of ballast resistor is defining depending on providing
of necessary mode of operation of half-wave rectifier, consisting of R5, VD1 elements and inner
voltage regulator, based on backswitched supporting diod.
Voltage is held by inner stabilitron at the rate of -8.6 V related to general output (output 14).
Pin function description
Output
Outputs function
number
Designation
01
02
03
04
05
Output
Comparator output
UCC
UEE
“General” bus connection output
Negative voltage of circuit supply
output of disabling pulses generator
Connection of the capacitor, determines operational mode of
voltage ramp generator
Gate Trigger Pulse
Ramp
Generator
Current Sense
Voltage Sense
Integration Capacitor
Feedbak
06
07
08
09
Current reading output
IC inner synchronization pin
feedback output
feedback input
Input
10
Current
output of resistor connection, regulates bias current
Programming
Phase Angle Set
Soft-Start
11
12
13
14
Phase Angle Set pin
"soft-start "set output
comparator direct input
comparator inverse input
+Input
-Input
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