TECHNICAL DATA
Automotive Direction Indicator
The IL33193-03 is a new generation industry
standard UAA1041 “Flasher”. It has been developed for
enhanced EMI sensitivity, system reliability, and improved
wiring simplification. The ILC33193-03 is pin compatible
with the UAA1041B..
It includes an RF filter on the fault detection pin
(Pin 7) for EMI purposes.
IL33193-03
Plastic DIP
FUTURES:
Pin to pin Compatible with the UAA1041B
Defective Lamp Detection Threshold
Short Circuit Detection and Relay Shutdown
RF Filter for EMI Purposes
Load Dump Protection
Internal Free Wheeling Diode Protection
SOIC
Vss
1
Vсс
2
Relay
3
Oscillator
4
8
Starter
7
Fault Detector
6
ON/OFF
FaultDetector
5
Oscillator
Fig.1 Pin Connections
ORDERING INFORMATION
Device
Operating Temperature
Range
T
A
= -45 to 125 C
T
A
= -45 to 105 C
Package
DIP-8
SOP-8
SOP-8
Packing
Tube
Tube
T&R
IL33193-03N
IL33193 -03D
IL33193-03DT
1
Starter
2
24 В… 32V
Detector
Relay
Driver
Reference
voltage
RF-
filter
8
7
3
Lamp Fault
Detector
5
Oscillator
4
Fig. 2 Block Diagram IL33193-03
February. 2012. rev. 01
IL33193-03
Typical Characteristics
Vcl, Clamping Voltage, (V)
Vih, Overvoltage Detection Threshold , (V)
Ta, ambient temperature, ( C)
O
Ta, ambient temperature , ( C)
Fig. 4. Overvoltage Detection versus Temperature
O
Fig 3.
Clamping Voltage versus Temperature
Icc, Supply Current, (mА)
Vbat = 13.5V
R2 = 220
Vsat, Output Voltage, (V)
Vbat = 13.5V
I = 250 mA
Relay on
Relay off
Ta, ambient temperature, ( C
Fig. 5. Supply Current versus Temperature
O
Ta, ambient temperature, ( C
Fig. 6. Output Voltage versus Temperature
O
February. 2012. rev. 01
IL33193-03
Function Description
Vbat
Vbat
Relay on
Relay Relay
on
off
t1
tn
Fn=1/tn
Relay off
tf
Ft=1/tf
Time
Fig. 7. Normal Operation Oscillator
Timing Diagram
Time
Fig. 8. One Defective Lamp Oscillator
Timing Diagram
Supply and Protection Systems
Pin 1 is connected to ground via resistor R2 which limits the current in the event of any high voltage transients.
Pin 2 (VCC) is the positive supply and may be connected directly to the vehicle’s battery voltage.
Overvoltage and Double Battery Protection:
When the applied VCC to VSS voltage is greater than 22 V, the
overvoltage detector circuit turns the relay driver off. Both the device and the lamps are protected if two 12 V batteries
are connected in series and used to jump start the vehicle.
Load Dump Overvoltage Protection:
A 29 V overvoltage detector protects the circuits against high voltage transients
due to load dumps and other low energy spikes. The relay driver is automatically turned on whenever the VCC to VSS
voltage is greater than 32 V.
Overvoltage Protection, High Voltage Transients:
The Enable and the Starter pins are protected against positive and
negative transients by internal on–chip diodes.
On–Chip Relay Driver
The device directly drives the flasher relay. The output structure is an Emitter of an NPN transistor. It contains the
free wheeling diode circuitry necessary to protect the device whenever the relay is switched off.
Oscillator
The device uses a sawtooth oscillator (Figure 7). The frequency is determined by the external components C1 and
R1. In the normal operating mode, the flashing frequency is: Fn = 1/R1*C1*Kn. With a defective (open) 21 W lamp
(Figure 8), the flashing frequency changes to: Fn = 2.5*Fn.
The typical first flash delay (the time between the moment when the indicator switch is closed and the first lamp flash
occurs) is: t1 = K1*R1*C1 Where a 21 W lamp opens, the delay is expressed as: t2 = K2*R1*C1
Short circuit detection delay t3 = K1*R1*C1.
Starter
Pin 8 is connected through a 2.2 kresistor to the flashing lamp. Pin 8 is the input to the Starter function and
senses the use of S1 by sensing ground through the lamp (Figure 9).
Lamp Fault Detector with Internal RF Filter
A Lamp defect is sensed by the lamp fault detector’s monitoring of the voltage developed across the external shunt
resistor R4 via the RF filter. The RS voltage drop is compared to a Vbat dependent internal reference voltage (Vref) to
validate the comparison over the full battery voltage range. A detected fault causes the oscillator to change frequency
(Figure 8).
February. 2012. rev. 01
IL33193-03
Short Circuit Detector
Detects excessive current (Ish > 25 A) flowing in the shunt resistor R4. The detection takes place after a time delay
of t3 (t3 = 55 ms). In this case, the relay will be turned off. The circuit is reset by switching S1 to the off position.
Operation with Short Circuit Detection
Pin 6 has to be left open and a capacitor C2 has to be connected between Pin 1 and Pin 2.
Operation without Short Circuit Detection
Pin 6 has to be connected to Pin 2, and the use of capacitor C2 is not necessary.
Vbat
D1
R2
01
02
C1
03
04
06
05
R3
R1
К1
R4
R2
08
07
К1.1
S1
ЕLD
ЕL1
ЕL2
ЕL3
ЕL4
ЕLD
С1 – 5.6
F
D1 – IL33193-03
ЕL1 - Е L4 – 21 W Turn Signal
Lamps
ЕLD – Dashboard Indicator
К1 – Relay
R1 – 75 к
R2 - 220
R3 - 2.2 к
R4 - 30 m
Fig. 9. IL33193-03 Typical Application
February. 2012. rev. 01
IL33193-03
Table 1- Electrical Characteristics (8.0V
≤
Vcc=Vbat
≤
18V)
Characteristic
Battery Voltage Range (Normal Operation)
Overvoltage Detector Threshold
(VPin2 – VPin1)
Clamping Voltage (R2 = 220 Ω)
Short Circuit Detector Threshold (Vpin2-
Vpin7)
Output Voltage [I = –250 mA (VPin2 – VPin3)]
Oscillator Constant (Normal Operation)
Duty Cycle (Normal Operation)
Oscillator Constant (One 21 W Lamp Defect)
Oscillator Constant
Duty Cycle (One 21 W Lamp Defect)
Current Consumption (Relay “Off ”),
Vbat = 13.5 V, R2 = 220 Ω
Current Consumption (Relay “On ”),
Vbat = 13.5 V, R2 = 220 Ω
Defect Lamp Detector Threshold [R2 = 220Ω,
(VPin2 – VPin7] , Vbat = 13.5 V]
%
Unit
V
V
V
V
V
Symbol
Vb
Vih
Vcl
Dth(sc)
Vsat
Kn
-
Kf
K1
K2
K3
-
mA
mA
mV
Icc
Icc
Vs
75
Limits
Min
8.0
19
27
0,63
-
1.3
1.25
45
0.45
0.41
0.150
0.200
0.126
35
-
Max
18
22
32
0,77
1,5
1.75
1.85
55
0.75
0.85
0.240
0.290
0.14
45
5.3
7.8
95
Temperature
o
T
A,
C
-45÷+125
-45÷+125
-45÷+125
25±10
-45÷+125
25±10
-45÷+125
-45÷+125
25±10
-45÷+125
25±10
-45÷+125
-45÷+125
-45÷+125
-45÷+125
Table 2 - MAXIMUM RATINGS
Rating, Symbol,
Operation Ambient Temperature Range
Storage Temperature Range
Pin 1 Positive Current (Continuous/Pulse), I1+
Pin 1 Negative Current (Continuous/Pulse), I1-
Pin 2 Current (Continuous/Pulse), I2
Pin 3 Current (Continuous/Pulse), I3
Pin 2 Current (Continuous/Pulse), I8
ESD (All Pins Except Pin 4 for Negative Pulse), Vesd
ESD (Pin 4 Negative Pulse), Vesd4-
Min
-45
-65
Max
125
150
150/500
-35/-500
±350/±1900
±300/±1400
±25/±50
±2000
-1000
Unit
o
o
C
C
mА
mА
mА
mА
mА
V
V
* Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device.
These are stress ratings only and functional operation of the device at these or any other conditions beyond those
indicated under “recommended operating conditions” is not implied.
Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
February. 2012. rev. 01
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