Order this document by UAA1041B/D
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.
•
•
•
•
•
AUTOMOTIVE DIRECTION
INDICATOR
Defective Lamp Detection
SEMICONDUCTOR
TECHNICAL DATA
Overvoltage Protection
Short Circuit Detection and Relay Shutdown to Prevent Risk of Fire
Reverse Battery Connection Protection
Integrated Suppression Clamp Diode
8
1
NO SUFFIX
PLASTIC PACKAGE
CASE 626
Figure 1. Typical Automotive System
8
1
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SO–8)
C2
–VCC
1
2
UAA1041
+
C1
RS
8
+V
7
–V
3
6
4
5
PIN CONNECTIONS
R2
R1
R3
–VCC
1
8
+Vbat
2
7
Fault Det
RLY Out
3
6
Fault Det On/Off
Oscillator
4
5
Oscillator
Relay
S1
L1
L
R
(Top View)
L6
S2
L2
L3
L4
L5
ORDERING INFORMATION
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
Start
RS = 30 mΩ
C1 = 5.6 µF
C2 = 0.047 µF
Device
UAA1041BD
UAA1041B
Operating
Temperature Range
TA = – 40° to +100°C
Motorola, Inc. 1996
MOTOROLA ANALOG IC DEVICE DATA
Package
SO–8
Plastic DIP
Rev 0
1
UAA1041B
MAXIMUM RATINGS
Rating
Pin
Value
Unit
1
mA
2
3
8
+150/+500
–35/–500
± 350/1900
± 300/1400
± 25/50
Junction Temperature
TJ
150
°C
Operating Ambient Temperature Range
TA
–40 to + 100
°C
Storage Temperature Range
Tstg
–65 to + 150
°C
Thermal Resistance, Junction–to–Ambient
RθJA
100
°C/W (Typ)
Current: Continuous/Pulse*
* One pulse with an exponential decay and with a time constant of 500 ms.
ELECTRICAL CHARACTERISTICS (T1 = 25°C)
Characteristics
Battery Voltage Range (normal operation)
Symbol
Min
Typ
Max
Unit
VB
8.0
–
18
V
Overvoltage Detector Threshold
(VPin2–VPin1)
Dth(OV)
19
20.2
21.5
V
Clamping Voltage
(VPin2–VPin1)
VIK
29
31.5
34
V
Short Circuit Detector Threshold
(VPin2–VPin7)
Dth(SC)
0.63
0.7
0.77
V
Output Voltage (Irelay = –250 mA)
(VPin2–VPin3)
VO
–
–
1.5
V
Starter Resistance Rst = R2 + RLamp
Rst
–
–
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
%
KF
0.63
0.68
0.73
–
Oscillator Constant – (1 lamp defect of 21 W)
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 VPin2 – VPin1 = 8.0 V
Pin 1; at VPin2 – VPin1 = 13.5 V
Pin 1; at VPin2 – VPin1 = 18 V
ICC
–
–2.5
–
–0.9
–1.6
–2.2
–
–1.0
–
Current Consumption (relay on)
Pin 1; at VPin2 – VPin1 = 8.0 V
Pin 1; at VPin2 – VPin1 = 13.5 V
Pin 1; at VPin2 – VPin1 = 18 V
–
–
–
–
–3.8
–5.6
–6.9
–
–
–
–
79
–
68
85.3
100
–
91
–
Defect Lamp Detector Threshold at VPin2 to VB = 8.0 V
and R3 = 220 Ω
= 13.5 V
= 18 V
VPin2–VPin7
VPin2–VPin7
VPin2–VPin7
mA
mA
mV
{ See Note 1 of Application Information
āā
2
MOTOROLA ANALOG IC DEVICE DATA
UAA1041B
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.
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
C2
JU–1
–VCC
1
RS
8
2
7
–V
UAA1041B
+
C1
+V
3
6
4
5
R2
R1
R3
Overvoltage Detection
Relay
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.
S1
L1
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.
L
L6
S2
L2
Short Circuit Detector
Detects excessive current (Ish > 25 A) flowing in the shunt
resistor RS. 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.
R
L3
L4
L5
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.
Operation without Short Circuit Detection
APPLICATION INFORMATION
1. The flashing cycle is started by closing S1. The switch
position is sensed across resistor R2 and RLamp by Input 8.
Rst = R2 + RLamp.
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.
2.
1
Flashing frequency: fn =
R1C1Kn
3. Flashing frequency in the case of one defective lightbulb
of 21 W:
1
fF =
Kn = 2,2KF
R1C1KF
MOTOROLA ANALOG IC DEVICE DATA
4. t1: delay at the moment when S1 is closed and first flash
t1: t1 = K1R1C
5. t2: defective lightbulb detection delay t2 = K2R1C1
6. t3: short circuit detection delay t3 = K1R1C1
In the case of short circuit – it is assumed that the voltage
(VPin2–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
7. detector is not used. In this case Pin 6 has to be connected
to Pin 2.
When overvoltage is sensed (VPin2 – VPin1) the relay is
8. turned off to protect the relay and the lightbulbs against
excessive currents.
3
UAA1041B
OUTLINE DIMENSIONS
8
PLASTIC PACKAGE
CASE 626–05
ISSUE K
5
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.
–B–
1
4
F
DIM
A
B
C
D
F
G
H
J
K
L
M
N
–A–
NOTE 2
L
C
J
–T–
N
SEATING
PLANE
D
M
K
MILLIMETERS
MIN
MAX
9.40
10.16
6.10
6.60
3.94
4.45
0.38
0.51
1.02
1.78
2.54 BSC
0.76
1.27
0.20
0.30
2.92
3.43
7.62 BSC
–––
10_
0.76
1.01
INCHES
MIN
MAX
0.370
0.400
0.240
0.260
0.155
0.175
0.015
0.020
0.040
0.070
0.100 BSC
0.030
0.050
0.008
0.012
0.115
0.135
0.300 BSC
–––
10_
0.030
0.040
G
H
0.13 (0.005)
M
T A
B
M
5
4X
–B–
1
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.
D SUFFIX
PLASTIC PACKAGE
CASE 751–05
(SO–8)
ISSUE N
–A–
8
M
P
0.25 (0.010)
4
M
B
M
G
R
C
–T–
8X
K
D
0.25 (0.010)
M
T B
SEATING
PLANE
S
A
X 45 _
M_
S
F
J
DIM
A
B
C
D
F
G
J
K
M
P
R
MILLIMETERS
MIN
MAX
4.80
5.00
3.80
4.00
1.35
1.75
0.35
0.49
0.40
1.25
1.27 BSC
0.18
0.25
0.10
0.25
0_
7_
5.80
6.20
0.25
0.50
INCHES
MIN
MAX
0.189
0.196
0.150
0.157
0.054
0.068
0.014
0.019
0.016
0.049
0.050 BSC
0.007
0.009
0.004
0.009
0_
7_
0.229
0.244
0.010
0.019
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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. “Typical” 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”
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was negligent regarding the design or manufacture of the part. Motorola and
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Opportunity/Affirmative Action Employer.
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4
◊
*UAA1041B/D*
MOTOROLA ANALOG IC DEVICE
DATA
UAA1041B/D