|
|
Numéro de référence | U643 | ||
Description | Flasher/ 30-mohm Shunt | ||
Fabricant | ATMEL Corporation | ||
Logo | |||
1 Page
Flasher, 30-mW Shunt
U643B
Description
The bipolar integrated circuit U643B is used in relay-
controlled automotive flashers where a high-level EMC
is required.
Lamp outage is indicated by frequency doubling during
hazard warning as well as direction mode.
Features
D Temperature and supply voltage compensated
flashing frequency
D Frequency doubling indicates lamp outage
D Relay driver output with high current
carrying capacity and low saturation voltage
D Minimum lamp load for flasher operation: ≥ 1 W
D Very low susceptibility to EMI
D Protection according to ISO/TR 7637/1 level 4
Block Diagram
C1
4
6
Measuring comparator K 1
V6–81 mV
K1 20 kW
2
5 kW
7
R3
Shunt
30 mW
+ VS
+ 49
K2
R1
Pulse
generator
49 a–Comparator K2
20 kW
49 a–Comparator K3
K3
5
20 kW
95 9756
3
Relay
8 R2
23 V
5 kW
IC Ground
1
1.5...2.2 kW
R4
470 W
49 a
5 W 21 W 21 W 21 W 21 W 5 W
GND
– 31
Indicator lamps
Figure 1. Application circuit as a car flasher, Resistor R1 and R2: 1/4 Watt
R4 for protection against continuous reversed polarity: 0.5 Watt
Ordering Information
Extended Type Number
Package
Remarks
U643B
DIP8
U643B-FP
SO8
Rev. A3, 10-Apr-01
1 (5)
|
|||
Pages | Pages 5 | ||
Télécharger | [ U643 ] |
No | Description détaillée | Fabricant |
U641B | INTERVAL AND WIPE/WASH WIPER CONTROL IC WITH DELAY | ATMEL Corporation |
U641B-FP | INTERVAL AND WIPE/WASH WIPER CONTROL IC WITH DELAY | ATMEL Corporation |
U642B | Automotive Wipe/Wash or Interval Switch | TEMIC Semiconductors |
U642B | Interval- and Wipe/ Wash Wiper Control IC | ATMEL Corporation |
US18650VTC5A | Lithium-Ion Battery | Sony |
TSPC106 | PCI Bus Bridge Memory Controller | ATMEL |
TP9380 | NPN SILICON RF POWER TRANSISTOR | Advanced Semiconductor |
www.DataSheetWiki.com | 2020 | Contactez-nous | Recherche |