U644B-FP [TEMIC]
Flasher, 18-m Shunt, Extremly Low Current Consumption; 闪光器， 18米的分流，极低的电流消耗
| 型号： | U644B-FP |
| 厂家： | 
TEMIC SEMICONDUCTORS |
| 描述： | Flasher, 18-m Shunt, Extremly Low Current Consumption |
| 文件： | 总6页 (文件大小：204K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
U644B
Flasher, 18-m Shunt, Extremly Low Current Consumption
Description
The bipolar integrated circuit, U644B, is used in relay- If the flasher module provides an 4-pin connector the
controlled automotive flashers where a high level EMC control pin of U644B (Pin 6) can be used to operate the
is required. Lamp outage is indicated by frequency doub- IC in an extremly low-current mode.
ling during hazard warning as well as direction mode.
Features
Frequency doubling indicates lamp outage
Minimum lamp load for flasher operation: 1 W
Very low susceptibility to EMI
Frequency independent of temperature and voltage
change
Protection according to ISO TR7637/1 level 4
Control input (Kl 15)
Relay driver output with high current-carrying
capacity and low saturation voltage
Ordering Information
Extended Type Number
U644B
Package
DIP8
Remarks
U644B-FP
SO8
Block Diagram
R
15
30
5
10 k
2
6
Measuring
R
comparator K
C
4
1
1
18 m
Shunt
V
–49 mV
S
20 k
2 k
20 k
4
K
7
1
2
K
Pulse
generator
3
8
R
1
49 a
Comparator K
Relay
2
3
20 k
R
3
49 a
K
3
3.3 k
5
13 k
49 a
Comparator K
30 V
20 k
R
2
1
GND
220
GND
–31
12707
Figure 1. Application circuit as a car flasher with control input
Resistor R1, R2 and R3: 1/4 Watt
R2 for protection against continuous reversed polarity: 1 Watt
TELEFUNKEN Semiconductors
1 (6)
Rev. A2, 25-Feb-97
U644B
+V
S
+49
2
6
Measuring
R
comparator K
C
1
4
1
18 m
Shunt
V
–49 mV
S
20 k
20 k
2 k
4
K
7
1
2
K
Pulse
R
3
8
1
generator
49 a
Comparator K
Relay
2
3
20 k
R
3
49 a
K
3
3.3 k
5
13 k
49 a
Comparator K
30 V
20 k
R
2
1
GND
220
GND
–31
12708
Figure 2. Application circuit as a car flasher without control input
Resistor R1, R2 and R3: 1/4 Watt
R2 for protection against continuous reversed polarity: 1 Watt
Application Note
In figure 1, the control input (Pin 6) is used to enable or disable U644B. If the ignition is switched off, the current
consumption is less than 50 A.
In figure 2, Pin 6 is bridged to Pin 2, so U644B works like U6043B. Note that the resistor values of R and R are
2
3
different from the U6043B (see application circuit).
Pin Description
Pin
1
2
3
4
5
6
7
8
Symbol
GND
Function
IC ground
1
2
3
4
GND
VS
8
7
6
5
SI
V
S
Supply voltage V
Relay driver
S
REL
OSC
OSC
LD
Vs
C Oscillator
1
U644B
R Oscillator
1
REL
V
S
Supply voltage / or control input
Lamp failure detection
Start input (49a)
LD
SI
OSC
OSC
13297
Figure 3. Pinning
2 (6)
TELEFUNKEN Semiconductors
Rev. A2, 25-Feb-97
U644B
Functional Description
Pin 1, GND
Pin 7, Lamp outage detection
The integrated circuit is protected against damage via The lamp current is monitored via an external shunt
resistor R to ground (–31) in the case of battery reversal. resistor R and an internal comparator K1 with its
2
4
An integrated protection circuit and the external reference voltage of typ. 49 mV (V = 12 V). The outage
S
resistances R and R limit the ac-current pulse in the IC. of one lamp out of two lamps is detected according to the
1
2
following calculation:
Nominal current of 1 lamp: 21 W / (V = 12 V):
Pin 2, Supply voltage, V - Power
S
S
Connected directly to battery (Kl 30).
I
= 1.75 A
lamp
Nominal current of 2 lamps: 2 x 21 W / (V = 12 V):
S
Pin 3, Relay control output (driver)
I
= 3.5 A.
lamp
The relay control output is a high-side driver with a low The detection threshold is recommended to be set in the
saturation voltage and capable to drive a typical automo- middle of the current range: I 2.7 A
Thus the shunt resistor is calculated as:
outage
tive relay with a minimum coil resistance of 60
An integrated overvoltage detection disables the output at
20 V to protect the lamps during jump start
.
R
R
= V (K1) / I
= 49 mV/2.7 A = 18 m .
sh
T outage
V
S
sh
Comparator K1‘s reference voltage is matched to the
characteristics of filament lamps (see “control signal
threshold” in the data part).
Pin 4 and 5 Oscillator
Flashing frequency, f , is determined by the R C
1
1
1
components as follows (see figure 1):
The combination of shunt resistor and resistance of wire
harness prevents Pin 7 from a too high voltage in the case
of shortet lamps.
1
f1
Hz
R1 C1 1.5
where
C
1
R
1
47 F
6.8 k to 510 k
Pin 8, Start input
Start condition for flashing: the voltage at Pin 8 has to be
below K3 threshold (flasher switch closed).
Humidity and dirt may decrease the resistance between
49 a and GND. If this leakage resistance is 5 k the IC
is still kept in its off-condition. In this case the voltage at
Pin 8 is between the thresholds of comparators K2 and
K3.
During the bright phase the voltage at pin 8 is above the
K2 threshold, during the dark phase it is below the K3
threshold.
In the case of a lamp outage (see Pin 7) the oscillator
frequency is switched to the lamp outage frequency f
2
with f
2.2 f .
2
1
Duty cycle in normal flashing mode: 50%
Duty cycle in lamp outage mode: 40% (bright phase)
Pin 6, Supply voltage, control input
When the IC is powered by the battery Pin 6 is the control
input to switch the IC to zero current consumption during
stand-by.
For proper start conditions a minimum lamp wattage of
1 W is required.
Absolute Maximum Ratings
Reference point Pin 1
Parameters
Symbol
V
S
Value
18
Unit
V
Supply voltage
Pin 2
Surge forward current
t = 0.1 ms
Pin 2
Pin 2
Pin 8
I
I
I
1.5
1.0
50
A
A
mA
P
FSM
FSM
FSM
t = 300 ms
P
t = 300 ms
P
Output current
Pin 3
I
0.3
A
O
Power dissipation
T
= 120°C
= 105°C
= 60°C
= 60°C
DIP8
SO8
DIP8
SO8
P
tot
P
tot
P
tot
P
tot
230
300
690
560
mW
mW
mW
mW
amb
T
amb
T
amb
T
amb
TELEFUNKEN Semiconductors
3 (6)
Rev. A2, 25-Feb-97
U644B
Absolute Maximum Ratings (continued)
Parameters
Symbol
Value
150
Unit
°C
Junction temperature
T
j
Ambient temperature range
DIP8
SO8
T
–40 to +120
–40 to +105
°C
°C
amb
T
amb
Storage temperature range
T
stg
–55 to +150
°C
Thermal Resistance
Parameters
Symbol
Value
Unit
Junction ambient
DIP8
SO8
R
thJA
R
thJA
110
160
K/W
K/W
Electrical Characteristics
Typical values under normal operation in application circuit figure 1, V (+49, Pin 2) = 12 V.
S
Reference point ground (–31), T
= 25°C unless otherwise specified
amb
Parameters
Supply voltage range
Supply current
Test Conditions / Pin
Symbol
V (+49)
Min.
Typ.
8 to 18
5
Max.
7
Unit
V
mA
Pin 2
S
Dark phase or
stand-by
Bright phase
I
S
Pin 2
Pin 2
Pin 3
Supply current
Relay output,
I
6
10
1.3
mA
V
S
I
300 mA
V
O
O =
saturation voltage
Relay output,
Pin 3
I
0.1
mA
O
reverse current
Relay coil resistance
R
L
60
Relay output overvoltage
detection (relay disabled)
Start delay
(first bright phase)
Frequency determining
resistor
19.0
20.2
22.5
10
V
ms
k
t
on
R
6.8
510
47
1
1
Frequency determining
capacitor
C
F
Frequency tolerance (normal flashing, basic frequency
f not including the tolerance of the external compo-
∆f
–6.5
+ 6.5
%
1
1
nents R and C )
1
1
Bright period (basic frequency f )
Bright period (control frequency f )
∆f
∆f
45
35
55
45
%
%
1
1
2
2
Frequency increase (lamp failure)
f
2.1
53
40.5
47.5
f
2.4
61
46.6
54.5
f
1
Hz
2
1
Control signal threshold
V = 18 V
s
Pin 7
Pin 7
Pin 7
V
R3
V
R3
V
R3
57
43.6
51
mV
mV
mV
V = 8 V
s
V = 13.5 V
s
Resistance between 49a to ground for stand-by
Lamp load
R
P
2
5.6
k
W
P
L
1
4 (6)
TELEFUNKEN Semiconductors
Rev. A2, 25-Feb-97
U644B
Package Information
Package DIP8
Dimensions in mm
9.8
9.5
7.77
7.47
1.64
1.44
4.8 max
3.3
6.4 max
0.5 min
0.36 max
0.58
0.48
9.8
8.2
2.54
7.62
8
5
technical drawings
according to DIN
specifications
13021
1
4
Package SO8
Dimensions in mm
5.2
4.8
5.00
3.7
4.85
1.4
0.25
0.2
0.4
3.8
0.10
1.27
6.15
5.85
3.81
8
5
technical drawings
according to DIN
specifications
13034
8
5
TELEFUNKEN Semiconductors
5 (6)
Rev. A2, 25-Feb-97
U644B
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. A2, 25-Feb-97
相关型号：
U65-B04-1010
Telecom and Datacom Connector, 98 Contact(s), Female, Right Angle, Solder Terminal, Receptacle
AMPHENOL
U65-B04-1012
Telecom and Datacom Connector, 98 Contact(s), Female, Right Angle, Surface Mount Terminal, Receptacle
AMPHENOL
©2020 ICPDF网 联系我们和版权申明