Datasheet UAA1041BD, UAA1041B Datasheet (Motorola)

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Page 1

Device

Operating

Temperature Range

Package



SEMICONDUCTOR

TECHNICAL DATA

AUTOMOTIVE DIRECTION

INDICATOR

ORDERING INFORMATION

UAA1041BD UAA1041B

TA = – 40° to +100°C

SO–8

Plastic DIP

PIN CONNECTIONS

Order this document by UAA1041B/D

D SUFFIX

PLASTIC PACKAGE

CASE 751

(SO–8)

NO SUFFIX

PLASTIC PACKAGE

CASE 626

Fault Det Fault Det On/Off

(Top View)

–V

RLY Out

Oscillator

bat

1 2 3 4

8 7 6 5

Start

Oscillator

MOTOROLA ANALOG IC DEVICE DATA

  

This device was designed for use in conjunction with a relay in automotive applications. It is also applicable for other warning lamps such as “handbrake ON,” etc.

• Defective Lamp Detection

• Overvoltage Protection

• Short Circuit Detection and Relay Shutdown to Prevent Risk of Fire

• Reverse Battery Connection Protection

• Integrated Suppression Clamp Diode

Figure 1. Typical Automotive System

Relay

1 2 3

8 7 6

L4 L5L3L2

–V

UAA1041

L1: 1.2 W, warning light handbrake ON L2, L3, L4, L5: 21 W, turn signals

R1 = 75 k R2 = 3.3 k R3 = 220

Ω

RS = 30 m

Ω

C1 = 5.6 µF C2 = 0.047

–V

 Motorola, Inc. 1996 Rev 0

Page 2

UAA1041B

MOTOROLA ANALOG IC DEVICE DATA

MAXIMUM RATINGS

Rating Pin Value Unit

Current: Continuous/Pulse* 1

2 3 8

+150/+500

–35/–500

±350/1900 ±300/1400

±25/50

Junction Temperature T

150 °C

Operating Ambient Temperature Range T

–40 to + 100 °C

Storage Temperature Range T

stg

–65 to + 150 °C

Thermal Resistance, Junction–to–Ambient R

θJA

100 °C/W (Typ)

* One pulse with an exponential decay and with a time constant of 500 ms.

ELECTRICAL CHARACTERISTICS (T

= 25°C)

Characteristics

Symbol Min Typ Max Unit

Battery Voltage Range (normal operation) V

8.0 – 18 V

Overvoltage Detector Threshold (V

Pin2–VPin1

) D

th(OV)

19 20.2 21.5 V

Clamping Voltage (V

Pin2–VPin1

) V

29 31.5 34 V

Short Circuit Detector Threshold (V

Pin2–VPin7

) D

th(SC)

0.63 0.7 0.77 V

Output Voltage (I

relay

= –250 mA) (V

Pin2–VPin3

) V

– – 1.5 V

Starter Resistance Rst = R2 + R

Lamp

– – 3.6 kΩ

{

Oscillator Constant (normal operation) Kn 1.4 1.5 1.6 – Temperature Coefficient of Kn Kn – –1.5x10

–3

– 1/°C Duty Cycle (normal operation) – 45 50 55 % Oscillator Constant – (1 lamp defect of 21 W) K

0.63 0.68 0.73 – Duty Cycle (1 lamp defect of 21 W) – 35 40 45 % Oscillator Constant K1

K2 K3

0.167

0.25

0.126

0.18

0.27

0.13

0.193

0.29

0.14

–

Current Consumption (relay off)

Pin 1; at V

Pin2

– V

Pin1

= 8.0 V

Pin 1; at V

Pin2

– V

Pin1

= 13.5 V

Pin 1; at V

Pin2

– V

Pin1

= 18 V

–

–2.5

–

–0.9 –1.6 –2.2

–

–1.0

–

Current Consumption (relay on)

Pin 1; at V

Pin2

– V

Pin1

= 8.0 V

Pin 1; at V

Pin2

– V

Pin1

= 13.5 V

Pin 1; at V

Pin2

– V

Pin1

= 18 V

–

– – –

–3.8 –5.6 –6.9

– – –

Defect Lamp Detector Threshold at V

2 to VB= 8.0 V

and R3 = 220 Ω = 13.5 V

= 18 V

Pin2–VPin7

–

85.3 100

–

{āāSee Note 1 of Application Information

Page 3

UAA1041B

MOTOROLA ANALOG IC DEVICE DATA

CIRCUIT DESCRIPTION

The circuit is designed to drive the direction indicator flasher relay. Figure 2 shows the typical system configuration with the external components. It consists of a network (R1, C1) to determine the oscillator frequency, shunt resistor (RS) to detect defective bulbs and short circuits in the system, and two current limiting resistors (R2/R3) to protect the IC against load dump transients. The circuit can be used either with or without short circuit detection, and features overvoltage, defective lamp and short circuit detection.

The lightbulbs L2, L3, L4, L5 are the turn signal indicators with the dashboard–light L6. When switch S1 is closed, after a time delay of t1 (in our example t1 = 75 ms), the relay will be actuated. The corresponding lightbulbs (L2, L3 or L4, L5) will flash at the oscillator frequency, independent of the battery voltage of 8.0 V to 18 V. The flashing cycle stops and the circuit is reset to the initial position when switch S1 is open.

Overvoltage Detection

Senses the battery voltage. When this voltage exceeds

20.2 V (this is the case when two batteries are connected in series), the relay will be turned off to protect the lightbulbs.

Lightbulb Defect Detector

Senses the current through the shunt resistor RS. When one of the lightbulbs is defective, the failure is indicated by doubling the flashing frequency.

Short Circuit Detector

Detects excessive current (Ish > 25 A) flowing in the shunt resistor RS. The detection takes place after a time delay of t

(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. The circuit can also be used for other warning flashers. In this example, when the handbrake is engaged, it is signaled by the light (L1).

Figure 2. Typical System Configuration

Relay

1 2 3

8 7 6

L4 L5L3L2

–V

UAA1041B

–V

JU–1

PARTS LIST

R1 = 75 kΩ Relay–Coil Resistance R2 = 3.3 kΩ Range 60 Ω to 800 Ω R3 = 220 Ω RS = 30 mΩ Note: Per text connect Wire Resistor jumper JU–1 bypass C1 = 5.6 µF short circuit detector C2 = 0.047 µF C2 may be deleted also.

1. The flashing cycle is started by closing S1. The switch

position is sensed across resistor R2 and R

Lamp

by Input 8.

Rst = R2 + R

Lamp.

The condition for the start is: Rst < 3.6 kΩ. For correct operation, leakage resistance from Pin 8 to ground must be greater than 5.6 kΩ.

Flashing frequency: fn =

R1C1K

Flashing frequency in the case of one defective lightbulb of 21 W:

fF =

R1C1K

Kn= 2,2K

t1: delay at the moment when S1 is closed and first flash

t1: t1 = K1R1C

t2: defective lightbulb detection delay t2 = K2R1C

t3: short circuit detection delay t3 = K1R1C

In the case of short circuit – it is assumed that the voltage

Pin2–VPin1

) ≥ 8.0 V . The relay will be turned off after delay t3. The circuit is reset by switching S1 to the off position. The capacitor C2 is not obligatory when the short circuit detector is not used. In this case Pin 6 has to be connected to Pin 2. When overvoltage is sensed (V

Pin2

– V

Pin1

) the relay is turned off to protect the relay and the lightbulbs against excessive currents.

APPLICATION INFORMATION

Page 4

UAA1041B

MOTOROLA ANALOG IC DEVICE DATA

PLASTIC PACKAGE

CASE 626–05

ISSUE K

D SUFFIX

PLASTIC PACKAGE

CASE 751–05

(SO–8)

ISSUE N

OUTLINE DIMENSIONS

NOTE 2

–A–

–B–

–T–

SEATING PLANE

0.13 (0.005) B

NOTES:

1. DIMENSION L TO CENTER OF LEAD WHEN FORMED PARALLEL.

2. PACKAGE CONTOUR OPTIONAL (ROUND OR SQUARE CORNERS).

3. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982.

DIM MIN MAX MIN MAX

INCHESMILLIMETERS

A 9.40 10.16 0.370 0.400 B 6.10 6.60 0.240 0.260 C 3.94 4.45 0.155 0.175 D 0.38 0.51 0.015 0.020 F 1.02 1.78 0.040 0.070 G 2.54 BSC 0.100 BSC H 0.76 1.27 0.030 0.050

J 0.20 0.30 0.008 0.012

K 2.92 3.43 0.115 0.135

L 7.62 BSC 0.300 BSC M ––– 10 ––– 10 N 0.76 1.01 0.030 0.040

NOTES:

1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982.

2. CONTROLLING DIMENSION: MILLIMETER.

3. DIMENSIONS A AND B DO NOT INCLUDE MOLD PROTRUSION.

4. MAXIMUM MOLD PROTRUSION 0.15 (0.006) PER SIDE.

5. DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.127 (0.005) TOTAL IN EXCESS OF THE D DIMENSION AT MAXIMUM MATERIAL CONDITION.

SEATING PLANE

4X P

A0.25 (0.010)MTB

0.25 (0.010)MB

8X D

X 45

–A–

–B–

–T–

DIM MIN MAX MIN MAX

INCHESMILLIMETERS

A 4.80 5.00 0.189 0.196 B 3.80 4.00 0.150 0.157 C 1.35 1.75 0.054 0.068 D 0.35 0.49 0.014 0.019 F 0.40 1.25 0.016 0.049 G 1.27 BSC 0.050 BSC J 0.18 0.25 0.007 0.009

K 0.10 0.25 0.004 0.009 M 0 7 0 7 P 5.80 6.20 0.229 0.244 R 0.25 0.50 0.010 0.019

____

Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty , representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. “T ypical” parameters which may be provided in Motorola data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. Motorola does not convey any license under its patent rights nor the rights of others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer.

How to reach us: USA/EUROPE/Locations Not Listed: Motorola Literature Distribution; JAPAN: Nippon Motorola Ltd.; Tatsumi–SPD–JLDC, 6F Seibu–Butsuryu–Center,

P.O. Box 20912; Phoenix, Arizona 85036. 1–800–441–2447 or 602–303–5454 3–14–2 Ta tsumi Koto–Ku, Tokyo 135, Japan. 03–81–3521–8315

MFAX: RMF AX0@email.sps.mot.com – TOUCHT ONE 602–244–6609 ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park, INTERNET: http://Design–NET.com 51 Ting Ko k Road, Tai Po, N.T ., Hong Kong. 852–26629298

UAA1041B/D

*UAA1041B/D*

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