IL33193 INTEGRAL | Alldatasheet

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IL33193 Automotive Direction Indicator

ORDERING INFORMATION

TA = -40° to 125°C for all packages The IL33193 is a new generation industry standard UAA1041 “Flasher”. It has been d eveloped fo r en hanced EMI sen sitivity, system reliab ility, an d improved wi ring si mplification. The IL33193 i s pi n com patible with the UAA1041 and UAA1041B in the standard application configuration as shown in Figure 9, wi thout l amp short ci rcuit det ection and usi ng a 20 m Ω shunt resistor. The IL33193 has a st andby m ode of operat ion requi ring very l ow standby supply current and can be di rectly connected to the vehicle’s battery. It includes an RF filter o n the Fault detection pin (Pin 7) for EMI purposes. Fault det ection t hresholds are reduced rel ative t o t hose of t he UAA1041, allowing a lower shunt resistance value (20 mW) to be used.

  • Pin Compatible with the UAA1041
  • Defective Lamp Detection Threshold
  • RF Filter for EMI Purposes
  • Load Dump Protection
  • Double Battery Capability for Jump Start PIN CONNECTIONS 8Vss Oscillator Oscillator Vсс Relay Starter Fault Detector Enable 4 5 Oscillator Lamp Fault Detector RF Filter Referen ce Vo ltage Relay Dr iver Detector 24V 33V StarterSW 1 SW 2 Simplified Block Diagram This Device contains 60 act ive transistors.

MAXIMUM RATINGS* Rating Simbol Value Unit Pin1 Positive Current (Continious/Pulse) I1+ 150 to 500 mA Pin1 Negative Current (Continious/Pulse) I1- -35 to -500 mA Current (Continious/Pulse) I2 ±350 to ±1900 mA Current (Continious/Pulse) I3 ±300 to ±1400 mA Current (Continious/Pulse) I8 ±25 to ±50 mA ESD(Aii Pins Except Pin4 for Negative Pulse) VESD ±2000 °V ESD(Pin 4 Negative Pulse) VESD4- -1000 °V Jinction Temperature TJ 150 °C Operation Ambient Temperature Range TA -40 to +125 °C Storage Temperature Range TSTG -65 to +150 °C ELECTRICAL CHARACTERISTICS (-45OC ≤ TA ≤ +125 OC, 8.0 V ≤ VCC ≤ 18.0 V, unless otherwise noted. Typical values reflect approximate mean at TA= 25 OC, VCC = 14 V at the time of initial device characterization.) Characteristic Symbol Min Max Unit Battery Voltage Range (Normal Operation) Vb 8.0 18 V Overvoltage Detector Threshold (VPin2 – VPin1) Vih 19 22 V Clamping Voltage (R2 = 220 Ω) Vcl 27 34 V Output Voltage [I = -250 mA (VPin2 – VPin3)] Vsat - 1.5 V Starter Resistance (Rst = R2 +RLamp) Rst - 3.6 kΩ Oscillator Constant (Normal Operation, TA= 25 OC) Kn 1.3 1.75 Temperature Coefficient of Kn TCKn - - 1/ OC Duty Cycle (Normal Operation) - 45 55 % Oscillator Constant (One 21 W Lamp Defect, TA= 25OC) Kf 0.59 0.75 Duty Cycle(One 21 W Lamp Defect) - 35 45 % Oscillator Constant (TA= 25 OC) K1 0.150 0.200 0.240 0.290 Standby Current (Ignition «Off») ICC - 100 µA Current Consumption (Relay «Off», Enable Pin 6 High) Vbat = 13.5 V, R3 = 220 Ω ICC - 3.5 mA Current Consumption (Relay «On») Vbat = 13.5 V, R3 = 220 Ω ICC - 6.0 mA Defect Lamp Detector [R3 = 220 Ω, (VPin2 – VPin7)] Vbat = 13.5 V VS 42.5 56 mV

Fn=1/tn TIME Vbat «On» «Off» tf Ft=1/tf «On» TIME Vbat «Off» Figure 1 - Normal Operation Oscillator Figure 2 - One Defective Lamp Oscillator Timing Diagram Timing Diagram INTRODUCTION The IL33193 is designed to drive the direction indicator flasher relay. It is a new generation industry standard UAA1041 “Flasher”. It consists of the following functions:

  • Supply and Protections
  • On–Chip Relay Driver
  • Oscillator
  • Starter Functions
  • Lamp Fault Detector with Internal RF Filter
  • Standby Mode Supply and Protection Systems Pin 1 i s connected to ground vi a resistor R3 which limits he current in the event of any high voltage transients. Pin 2 (VCC) is the positive supply and m ay be connected directly to the vehicle’s battery voltage. Overvoltage and Double Battery Protection: When the applied VCC to VSS vol tage is greater than 22 V, t he overvoltage detector circuit turns the relay driver off. Both the device and the lamps are protected if two 12 V bat teries are connected in series and used to jump start the vehicle.Load Dump Overvoltage Protection: A 29 V overvol tage detector protects the circuits against high vol tage t ransients due t o load dumps and ot her l ow energy spi kes. The relay driver is automatically turned on whenever the VCC to VSS voltage is greater than 34 V. Overvol tage 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 1). The frequency is determ ined by the external com ponents 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 2), the flashing frequency changes to: Fn = 2.2*Fn. The typical first flash delay (the tim e between the m oment when the indicator switch is closed and the first lam p flash occurs) is: t1 = K1 *R1*C1 The fault detection delay is fro m the time relay R1 is o n and fault detection is enabled. Where a 21 W lamp opens, the delay is expressed as: t2 = K2*R1*C1

Pin 8 is connected through a 3.3 kW resistor 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 (Figures 9 and 10). Lamp Fault Detector with Internal RF Filter A Lamp defect is sensed by the lamp fault detector’s monitoring of t he voltage developed across the external shunt resistor RS 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 d etected fault causes the oscillator to change frequency (Figure 2). Standby Mode When the ignition key and warning switches are open; Enable is in a low state and the internal switches, SW1 and SW2, are open and no current passes through the circuit. In this condition, the device’s current consumption is zero (ICC = 0). When ignition key and warning switches are cl osed; Enable is in a hi gh state with SW1 and SW 2 being closed and the circuit is powered on. Main differences between UAA1041B & IL33193 The IL33193 is pin compatible with the UAA1041. Supply Current Supply current is more stable on the IL33193 when the device is in “on” or “off” state. In “on” state the supply current is only 40% higher than when i n the “off” state, as compared to a ratio of 3 t imes for t he UAA1041. Thi s results in a lowern voltage drop across the ground resistor R3 (see On–Chip Relay Driver). Short Circuit Detection The IL33193 has no short circuit detection. Standby Mode (Pin 6) The UAA1041 has no st andby mode. Pin 6 i s used as an Enable/Disable for t he short circuit detection. The IL33193 uses Pin 6 to set the device in standby mode. If Pi n 6 i s connected to ground, t he IL33193 i s in the standby mode. In this mode, standby current is very low and Pin 8’s starter resistor R2 and a 2.0 kW internal resistor are switched off. As soon as Pin 6 is at a high level (typical threshold = 2Vbe) t he device becomes active. In t he application, the IL33193 can be connected directly to the battery and awakened whenever Pin 6 is connected to the vehicle’s battery by way of a protection resistor and the ignition key switch. Lamp Defect Detection (Pin 7) The UAA1041 operates with a 30 m W shunt resistor to sense the lamp current. It’s lamp defect detection threshold of Pin 7 is typically 85 mV. The IL33193 is designed to operate with 20 mW shunt resistor and at a reduced t hreshold of 50 mV. This reduces power generation in the flasher m odule. In addition, th e IL33193 incorporates an RF filter to enhance RFI immunity. Load Dump and Overvoltage Behavior The UAA1041 and IL33193 both behave the same in this regard. Both have double battery detection and lamp turn–off protection in the event of a jump start. During load dump, both devices are prot ected by an i nternal 30 V zener di ode with the relay activated during a load dump. Relay Driver Drive cap ability o f b oth d evices is th e sam e. Free wheeling diode protection is internal to both devices. The free wheeling voltage is 2Vbe for the UAA1041 and 3Vbe for the IL33193. This results in a higher clamp voltage across the relay and thus in a faster turn–off. In addition, the lower “on” state supply current is lower on the IL33193 and thus the voltage drop across the ground resistor R3 is reduced. This results in an even higher clamp voltage across the relay. Oscillator Phase The oscillator phase is opposite on the IL33193 as compared to the UAA1041. The Oscillator voltage is falling during “on” state and rising during “off” state for the IL33193.

Rs = 20 mΩ R1 = 75 kΩ C1 = 5.6 µF R2 = 3.3 kΩ R3 = 200 Ω L2, L3, L4, L5 = 21 W Tum Signal Lamps Figure 9 - IL33193 Typical Application

Application Information

NOTES: 1. In the above application, the IL33193 is compatible with the UAA1041 and UAA1041B except for the shunt resistor value (Rs = 20 mΩ). 2. The flashing cycle is started by the closing of switch S1. 3. The position of switch S1 is sensed across resistor R2 and RLamp by the input, Pin 8.

Rs = 20 mΩ R1 = 75 kΩ C1 = 5.6 µF R2 = 2.2 kΩ R3 = 220 Ω 10 kΩ ≤ R4 ≤ 47 kΩ 10 kΩ ≤ R5 ≤ 47 kΩ Relay 1 L1, L2, L3, L4 = 21W LD ⎯ Dashboard Indicator Left Right Figure 10. IL33193 Typical Application Notes: 1.The flashing cycle is started by the dosing of switch S1. 2.The S1 switch position is sensed across the resistor R2 and RLAMP by the input (Pin8). 3. If the logic state at Pin6 is [0], the current through R2 is off.

(MS – 001BA) Symbol MIN MAX A 8.51 10.16 B 6.1 7.11 C 5.33 D 0.36 0.56 F 1.14 1.78 G H J 0° 10° K 2.92 3.81 NOTES: L 7.62 8.26 1. Dimensions “A”, “B” do not include mold flash or protrusions. M 0.2 0.36 Maximum mold flash or protrusions 0.25 mm (0.010) per side. N 0.38 D SUFFIX SOIC (MS - 012AA) Symbol MIN MAX A 4.8 5 B 3.8 4 C 1.35 1.75 D 0.33 0.51 F 0.4 1.27 G H J 0° 8° NOTES: K 0.1 0.25 1. Dimensions A and B do not include mold flash or protrusion. M 0.19 0.25 1.27 5.72 Dimension, mm Dimension, mm 2.54 7.62 A BH C K C M J F M P G D R x 45 SEATING PLANE 0.25 (0.010) M T -T- L H M J A B F G D SEATING PLANE N K 0.25 (0.010) M T -T- C