U2044B-FP [TEMIC]
Dual Output Flasher; 双路输出闪光
| 型号： | U2044B-FP |
| 厂家： | 
TEMIC SEMICONDUCTORS |
| 描述： | Dual Output Flasher |
| 文件： | 总6页 (文件大小：179K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
U2044B
Dual Output Flasher
Description
The integrated circuit U2044B is used in relay controlled The separate hazard warning input simplifies the
automotive flashers. With two output stages each side of construction of the hazard switch. Lamp outage is indi-
the vehicle is controlled separately. A left and a right cated by frequency doubling during direction mode.
direction indicator input with only a small control current Thanks to the extreme low current consumption U2044B
makes switch contacts for small loads possible.
can be connected to the battery directly.
Features
Temperature and supply voltage compensated
flashing frequency
Very low susceptibility to EMI
Protection according to ISO/TR7637/1 level 4
Frequency doubling indicates lamp outage
Extremly low current consumption < 10 A
(@switches open)
Two relay driver outputs with high current-carrying
capacity and low saturation voltage
Reverse polarity protection
Minimum lamp load for flasher operation: 1 W
Three control inputs: left, right and hazard warning
Ordering Information
Extended Type Number
U2044B
Package
DIP14
SO14
Remarks
U2044B-FP
Pin Description
Pin
1
2
3
4
5
6
7
8
Symbol
OSC
SIL
SIR
SIHW
Function
OSC
1
2
3
4
5
6
7
14
13
12
OSC
OR2
Oscillator
Start input left
Start input right
Start input hazard warning
SIL
SIR
Vs
V
S
V
S
CR1
CR2
LD
Control input relay 1
Control input relay 2
Lamp failure detection
OR1
GND
11
10
9
SIHW
VS
U2044B
9
V
S
V
S
IC ground
CR1
CR2
VS
10
11
12
13
14
GND
OR1
Output relay 1
LD
8
V
S
V
S
12750
OR2
OSC
Output relay 2
Oscillator
Figure 1. Pinning
TELEFUNKEN Semiconductors
1 (6)
Rev. A1, 25-Feb-97
U2044B
Block Diagram
30
30
9
5
RShunt
30 m
VS–81 mV
+
–
C1
8
4.7
F
K1
Contact
1
2
+
–
14
1
R1
R9
82 k
6
7
VRef1
47 k
R8
+
–
+
–
47 k
–
+
VS /2
VRef2
–
+
VS–6 V
27.5 V
13 GND 10
12
30
11
3
2
4
R2
220
R3
4.7 k
R10
1.2 k
Hazard warning
R4
4.7 k
R6
Relay
1
4.7 k
right
2
15
31
left
R5
1.2 k
R7
1.2 k
12700
Figure 2. Application circuit
R2 for protection against continous reversed polarity: 1 Watt
Functional Description
Pin 1 and Pin 14, Oscillator
Flashing frequency, f , is determined by the R C
components as follows (see figure 2):
1
1
1
Pin 2 and Pin 3, Start input right and left
Flashing is disabled as long as the input comparator is tied
zu GND (pull-down resistor R or R ). The high side
7
5
1
C1
f1
Hz
flasher switch ”left” or ”right” changes the comparator
status and enables the output stage at Pin 11 or Pin 13. R
R1
1.5
6
and R are protection resistors for the input stage.
4
where
C
R
47 F
6.8 k to 510 k
1
1
With an open flasher switch the current consumption is
only I 10 A. The IC kept in stand-by mode until there
is a voltage drop of V 6.9 V at the pull-down resistor.
In the case of a lamp outage the oscillator frequency is
switched to the lamp outage frequency f with
2
Direction mode can only be activated when the ignition
switch is in ON-position as shown in figure 2.
f
2.2 f .
2
1
Duty cycle in normal flashing mode: 50%
Pin 4, Start input hazard warnig
Duty cycle in lamp outage mode (bright phase): 40%
In contrast to the direction switches, the hazard input is
2 (6)
TELEFUNKEN Semiconductors
Rev. A1, 25-Feb-97
U2044B
a low-side type. The pull-up resistor R provides the off- Comparator K1‘s reference voltage is matched to the
10
state. R is a protection resistor for the input stage.
characteristics of filament lamps (see “control signal
threshold” in the data part).
The combination of shunt resistor and resistance of wire
harness prevents Pin 8 from a too high voltage in the case
of shortet lamps.
3
Hazard warning can be activated independent of the igni-
tion switch position.
Pin 5, Supply voltage sense
This pin supplies the lamp outage comparator at Pin 8 and
is externally connected to the battery (Kl 30).
Pin 9, Supply voltage
This pin supplies the oscillator, the comparators and the
logic parts of the IC.
Pin 6 and 7, Control input relay 1 and 2
The feedback detects the bright phase and the dark phase
and enables the oscillator.
Pin 10, GND
The integrated circuit is protected against transients
Pin 8, Lamp outage detection
The lamp current is monitored via an external shunt
according to ISO–TR 7637–3 level 3 via resistor R to
2
ground (–31). An integrated protection circuit together
resistor, R
and an internal comparator K1 with its
Shunt
with external resistors R R R R R and R limits the
2, 3, 4, 6,
8
9
reference voltage of typ. 81 mV (V = 12 V). The outage
of one lamp out of two lamps is detected according to the
following calculation:
S
current pulses in the IC. Against reversed battery the IC
is also protected .
Nominal current of 1 lamp: 21 W / (V = 12 V):
S
Pin 11 and 13, Control output relay 1 and 2
I
= 1.75 A
lamp
The relay control outputs are high-side driver with a low
saturation voltage and capable to drive a typical
automotive relay with a coil resistance of 60
Nominal current of 2 lamps: 2 x 21 W / (V = 12 V):
S
I
= 3.5 A.
lamp
The detection threshold is recommended to be set in the
middle of the current range: I 2.7 A
Thus the shunt resistor is calculated as:
Pin 12, Supply voltage power
outage
This pin supplies the relay drivers connected directly to
the battery (Kl 30). It is internally clamped by a 27-V
Z-diode.
R
Shunt
R
Shunt
= V (K1) / I
= 81 mV/2.7 A = 30 m .
T outage
Absolute Maximum Ratings
Reference point ground (terminal 31), with external circuitry.
Parameters
Symbol
V
S
Value
24
Unit
V
Supply voltage, 1 min
Junction temperature
Storage temperature range
Ambient temperature range
Pins 5, 9, 12
T
150
–55 to +150
–40 to +100
°C
°C
°C
j
T
stg
T
amb
Thermal Resistance
Parameters
Symbol
Value
Unit
Junction ambient
DIP14
SO14
R
thJA
R
thJA
90
120
K/W
K/W
TELEFUNKEN Semiconductors
3 (6)
Rev. A1, 25-Feb-97
U2044B
Electrical Characteristics
Typical values under normal operation in application circuit figure 1, V (+30) = 12 V.
S
Reference point ground (–31), T
= 25°C, unless otherwise specified.
amb
Parameters
Supply voltage range
Supply current,
switches open
Test Conditions / Pins
Symbol
V
S
Min.
8
Typ.
Max.
18
10
Unit
V
A
Pins 5, 9, 12
Pins 5, 9, 12
I
S
Output current for relay
driver
Saturation voltage
Pins 11, 13
Pins 11, 13
I
300
mA
O
R = 82
L
V = 8 V
V = 12 V
S
V
R
1.0
1.2
V
V
S
O
Relay coil resistance
60
L
Relay output,
reverse current
Start delay
(first bright phase)
Pins 11, 13
Pin 8
I
0.1
10
mA
ms
O
t
ON
Control signal threshold
V = 9 V
V
70.6
85.0
93.0
mV
mV
mV
S
S
V = 13.5 V
S
V = 16 V
S
Tolerance of control signal V = 9 to 16 V, Pin 8
S
threshold
T
amb
= –40 to +100°C
–6
+6
%
Temperature coefficient of
control signal threshold
V = 13.5 V
S
Pin 8
T
10
V/K
K
Clamping voltage
Relay output overvoltage
detection (relay disabled)
T
T
amb
= –40 to +100°C
= –40 to +100°C
V
V
25.0
18
27.5
20
30.0
22
V
V
amb
12
12
Tolerances
V = 9 to 18 V, T
= –40 to +100°C
S
amb
Parameters
Frequency determining
resistor
Test Conditions / Pins
Symbol
Min.
6.8
Typ.
Max.
510
Unit
k
R
1
Frequency determining
capacitor
Frequency tolerance
C
47
+5
F
1
f
–5
%
1
(normal flashing basic fre-
quency f not including the
1
tolerance of the external
components R and C )
1
1
Bright period (basic fre-
F
47
37
53
45
%
%
1
quency f )
1
Bright period
f
2
(control frequency f )
2
2.15
f1
2.3
f1
Frequency increase
(lamp failure)
Lamp load
f
Hz
W
2
P
1
L
4 (6)
TELEFUNKEN Semiconductors
Rev. A1, 25-Feb-97
U2044B
Package Information
Package DIP14
Dimensions in mm
7.77
7.47
20.0 max
4.8 max
6.4 max
3.3
0.5 min
0.36 max
1.64 0.58
1.44 0.48
9.8
8.2
2.54
15.24
14
8
technical drawings
according to DIN
specifications
13020
1
7
Package SO14
Dimensions in mm
5.2
4.8
8.75
7.62
3.7
1.4
0.25
0.2
0.4
3.8
0.10
1.27
6.15
5.85
14
8
technical drawings
according to DIN
specifications
13035
14
8
TELEFUNKEN Semiconductors
5 (6)
Rev. A1, 25-Feb-97
U2044B
Ozone Depleting Substances Policy Statement
It is the policy of TEMIC TELEFUNKEN microelectronic GmbH to
1. Meet all present and future national and international statutory requirements.
2. Regularly and continuously improve the performance of our products, processes, distribution and operating systems
with respect to their impact on the health and safety of our employees and the public, as well as their impact on
the environment.
It is particular concern to control or eliminate releases of those substances into the atmosphere which are known as
ozone depleting substances (ODSs).
The Montreal Protocol (1987) and its London Amendments (1990) intend to severely restrict the use of ODSs and
forbid their use within the next ten years. Various national and international initiatives are pressing for an earlier ban
on these substances.
TEMIC TELEFUNKEN microelectronic GmbH semiconductor division has been able to use its policy of
continuous improvements to eliminate the use of ODSs listed in the following documents.
1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments respectively
2. Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental
Protection Agency (EPA) in the USA
3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C (transitional substances) respectively.
TEMIC can certify that our semiconductors are not manufactured with ozone depleting substances and do not contain
such substances.
We reserve the right to make changes to improve technical design and may do so without further notice.
Parameters can vary in different applications. All operating parameters must be validated for each customer
application by the customer. Should the buyer use TEMIC products for any unintended or unauthorized
application, the buyer shall indemnify TEMIC against all claims, costs, damages, and expenses, arising out of,
directly or indirectly, any claim of personal damage, injury or death associated with such unintended or
unauthorized use.
TEMIC TELEFUNKEN microelectronic GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany
Telephone: 49 (0)7131 67 2831, Fax number: 49 (0)7131 67 2423
6 (6)
TELEFUNKEN Semiconductors
Rev. A1, 25-Feb-97
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