Motorola MC33193D, MC33193P Datasheet

Device

Operating

Temperature Range

Package



SEMICONDUCTOR

TECHNICAL DATA

AUTOMOTIVE

DIRECTION INDICATOR

ORDERING INFORMATION

MC33193D MC33193P

TA = –40° to +125°C

SO–8

DIP–8

D SUFFIX

PLASTIC PACKAGE

CASE 751

(SO–8)

PIN CONNECTIONS

Order this document by MC33193/D

P SUFFIX

PLASTIC PACKAGE

CASE 626

6 7 8

2 3 4

Oscillator

Relay

Oscillator Enable Fault Detector Starter

(Top View)

MOTOROLA ANALOG IC DEVICE DATA

 

  

The MC33193 is a new generation industry standard UAA1041 “Flasher”. It has been developed for enhanced EMI sensitivity, system reliability, and improved wiring simplification. The MC33193 is pin compatible with the UAA1041 and UAA1041B in the standard application configuration as shown in Figure 9, without lamp short circuit detection and using a 20 mΩ shunt resistor. The MC33193 has a standby mode of operation requiring very low standby supply current and can be directly connected to the vehicle’s battery. It includes an RF filter on the Fault detection pin (Pin 7) for EMI purposes. Fault detection thresholds are reduced relative to those of the UAA1041, allowing a lower shunt resistance value (20 mΩ) 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 Protection

• Internal Free Wheeling Diode Protection

• Low Standby Current Mode

Simplified Block Diagram

SW2

SW1

Starter

24 V 33 V

Detector

Relay Driver

Lamp Fault

Detector

Oscillator

Reference

Voltage

Filter

This device contains 60 active transistors.

This document contains information on a new product. Specifications and information herein are subject to change without notice.

 Motorola, Inc. 1996 Rev 0

MC33193

MOTOROLA ANALOG IC DEVICE DATA

MAXIMUM RATINGS

Rating Symbol Value Unit

Pin 1 Positive Current (Continuous/Pulse) I1+ 150 to 500 mA Pin 1 Negative Current (Continuous/Pulse) I1– –35 to –500 mA Pin 2 Current (Continuous/Pulse) I2 ±350 to ±1900 mA Pin 3 Current (Continuous/Pulse) I3 ±300 to ±1400 mA Pin 8 Current (Continuous/Pulse) I8 ±25 to ±50 mA ESD (All Pins Except Pin 4 for Negative Pulse) V

ESD

±2000 V

ESD (Pin 4 Negative Pulse) V

ESD4–

–1000 V

Junction Temperature T

150 °C

Operation Ambient Temperature Range T

–40 to +125 °C

Storage Temperature Range T

stg

–65 to +150 °C

ELECTRICAL CHARACTERISTICS (–40°C ≤ T

≤ +125°C, 8.0 V ≤ VCC ≤ 18 V , unless otherwise noted. Typical values

reflect approximate mean at TA = 25°C, VCC = 14 V at the time of initial device characterization.)

Characteristic

Symbol Min Typ Max Unit

Battery Voltage Range (Normal Operation) V

8.0 – 18 V

Overvoltage Detector Threshold (V

Pin2

– V

Pin1

) V

19 20.2 22 V

Clamping Voltage (R2 = 220 Ω) V

27 29.2 34 V

Output Voltage [I = –250 mA (V

Pin2

– V

Pin3

)] V

sat

– – 1.5 V

Starter Resistance (Rst = R2 + R

Lamp

) R

– 3.3 3.6 kΩ

Oscillator Constant (Normal Operation, TA = 25°C) K

1.3 1.5 1.75 X

Temperature Coefficient of K

– 0.001 – 1/ °C Duty Cycle (Normal Operation) – 45 50 55 % Oscillator Constant (One 21 W Lamp Defect, TA = 25°C) K

0.63 0.68 0.73 X Duty Cycle (One 21 W Lamp Defect) – 35 40 45 % Oscillator Constant (TA = 25°C) K1

0.167

0.250

0.180

0.270

0.193

0.290

–

Standby Current (Ignition “Off”) I

– 2.0 100 µA

Current Consumption (Relay “Off,” Enable Pin 6 High) I

bat

= 8.0 V, R3 = 220 Ω, TA = 25°C – 1.40 –

bat

= 13.5 V , R3 = 220 Ω – 2.16 3.5

bat

= 18 V, R3 = 220 Ω, TA = 25°C – 2.64 –

Current Consumption (Relay “On”) I

bat

= 8.0 V, R3 = 220 Ω, TA = 25°C – 1.62 –

bat

= 13.5 V , R3 = 220 Ω – 2.06 6.0

bat

= 18 V, R3 = 220 Ω, TA = 25°C – 3.30 –

Defect Lamp Detector Threshold [R3 = 220 Ω, (V

Pin2

– V

Pin7

)] V

bat

= 8.0 V , TA = 25°C – 43.6 –

bat

= 13.5 V 46.5 51.0 56

bat

= 18 V, TA = 25°C – 57.0 –

Temperature Coefficient of V

– 0.3 x 10

–3

– 1/°C

MC33193

MOTOROLA ANALOG IC DEVICE DATA

Figure 1. Normal Operation Oscillator

Timing Diagram

Figure 2. One Defective Lamp Oscillator

Timing Diagram

–4.0

–3.0

–2.0

–1.0

bat

“On” “Off”

–4.0

–3.0

–2.0

–1.0

bat

Fn = 1/t

Ft = 1/t

TIME TIME

INTRODUCTION

The MC33193 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 is connected to ground via resistor R3 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 V

voltage is greater than 34 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 1).

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 2), the flashing frequency changes to: Fn =

2.2*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

The fault detection delay is from the time relay R1 is on and fault detection is enabled. Where a 21 W lamp opens, the delay is expressed as: t2 = K2*R1*C1

Starter

Pin 8 is connected through a 3.3 kΩ 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 the voltage developed across the external shunt resistor RS via the RF filter. The RS voltage drop is compared to a V

bat

dependent internal reference voltage

ref

) to validate the comparison over the full battery voltage range. A detected 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 closed; Enable is in a high state with SW1 and SW2 being closed and the circuit is powered on.

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