U643B-FP ATMEL [ATMEL Corporation], U643B-FP Datasheet

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U643B-FP

Manufacturer Part Number
U643B-FP
Description
Flasher, 30-mohm Shunt
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet

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Company
Part Number
Manufacturer
Quantity
Price
Part Number:
U643B-FP
Manufacturer:
华奥DHA
Quantity:
20 000
Flasher, 30-mW Shunt
Description
The bipolar integrated circuit U643B is used in relay-
controlled automotive flashers where a high-level EMC
is required.
Features
D Temperature and supply voltage compensated
D Frequency doubling indicates lamp outage
D Relay driver output with high current
Block Diagram
Ordering Information
Rev. A3, 10-Apr-01
R
flashing frequency
carrying capacity and low saturation voltage
C
1
1
Extended Type Number
95 9756
4
5
generator
U643B-FP
Pulse
U643B
Measuring comparator K
49 a–Comparator K
49 a–Comparator K
Figure 1. Application circuit as a car flasher, Resistor R
K
K
K
2
1
3
R
V
4
6
–81 mV
for protection against continuous reversed polarity: 0.5 Watt
20 kW
20 kW
2
20 kW
3
1
6
Package
5 kW
5 kW
DIP8
IC Ground
SO8
23 V
2
1
Lamp outage is indicated by frequency doubling during
hazard warning as well as direction mode.
D Minimum lamp load for flasher operation:
D Very low susceptibility to EMI
D Protection according to ISO/TR 7637/1 level 4
7
3
8
1.5...2.2 kW
470 W
Relay
R
R
2
4
1
and R
GND
– 31
5 W
2
: 1/4 Watt
21 W
Remarks
21 W
Indicator lamps
Shunt
R
3
30 mW
49 a
U643B
21 W 21 W 5 W
1 W
+ V
+ 49
1 (5)
S

Related parts for U643B-FP

U643B-FP Summary of contents

Page 1

... R for protection against continuous reversed polarity: 0.5 Watt 4 Ordering Information Extended Type Number U643B U643B-FP Rev. A3, 10-Apr-01 Lamp outage is indicated by frequency doubling during hazard warning as well as direction mode. D Minimum lamp load for flasher operation: D Very low susceptibility to EMI D Protection according to ISO/TR 7637/1 level 4 ...

Page 2

... During the bright phase the voltage at Pin 8 is above the K2 threshold, during the dark phase it is below the K3 threshold. For proper start conditions a minimum lamp wattage required U643B OSC 94 9290 Figure 2. Pinning / shunt to Pin and an internal comparator K1 with its = 12 V) ...

Page 3

... Pin Pin Pin U643B Value Unit 16.5 V 1.5 1 1.0 1 0.3 A 420 mW 340 340 mW mW 690 mW 560 mW 150 C –40 ... + 95 C –55 ... + 150 C Value Unit ...

Page 4

... U643B Package Information Package DIP8 Dimensions Package SO8 Dimensions in mm 0.4 1. (5) 9.8 9.5 1.64 1.44 4.8 max 6.4 max 3.3 0.5 min 0.36 max 0.58 2.54 0.48 7.62 5 technical drawings according to DIN specifications 4 5.2 4.8 5.00 4.85 3.7 1.4 0.25 3.8 0.10 6.15 3.81 5.85 5 technical drawings according to DIN specifications 4 7.77 7.47 9.8 8.2 13021 0.2 13034 Rev. A3, 10-Apr-01 ...

Page 5

... Data sheets can also be retrieved from the Internet: Atmel Germany GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany Telephone: 49 (0)7131 67 2594, Fax number: 49 (0)7131 67 2423 Rev. A3, 10-Apr-01 U643B http://www.atmel–wm.com 5 (5) ...

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