U6433B-MFP [ATMEL]
Analog Circuit, BIPolar, PDSO8;
| 型号： | U6433B-MFP |
| 厂家： | 
ATMEL |
| 描述： | Analog Circuit, BIPolar, PDSO8 |
| 文件： | 总8页 (文件大小：195K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Features
•
•
•
•
•
•
•
•
Temperature and Voltage Compensated Frequency
Warning Indication of Lamp Failure by Means of Frequency Doubling can be Disabled
Voltage Dependence of the Car Indicator Lamps Compensated for Lamp Failure
Relay Output with High Current Carrying Capacity and Low Saturation Voltage
Minimum Lamp Load for Flasher Operation ≥ 1W
Load-dump Protection
Flasher, 18-mΩ
Shunt,
Very Low Susceptibility to EMI
Protection According to ISO/TR 7637/1 Level 4
Frequency
Doubling
Disabling
1. Description
The design of the U6433B is similar to that of U6043B, both devices have the same
excellent EMC (Electro Magnetic Capability) and protection features. The U6433B
includes an additional 8-mV comparator and a logical connection with the frequency
doubling stage. This combination can be used for a hazard switch which bypasses the
external shunt resistor to disable the frequency doubling. This feature is especially
important with respect to the US automotive industry. During direction mode the
U6433B works like other flashers, that is, frequency doubling in the case of lamp
outage.
U6433B
Rev. 4810B–AUTO–10/05
Figure 1-1. Block Diagram
VS
6
2
G5
VS - 49 mV
+
-
K1
C1
+
K4
D1
23 V
-
4.7 µF
VS - 8 mV
G2
+
K5
4
5
R1
-
V
- 4 V
S
82 kΩ
G4
K2
K3
VS - 8 V
49 a
VS - 6 V
3
7
8
1
Shunt
R
4
R3
VS
470 Ω
18 mΩ
R2
1.5 kΩ
PL >1 W
2
U6433B
4810B–AUTO–10/05
U6433B
2. Pin Configuration
Figure 2-1. Pinning SO8
GND
8
7
6
5
1
SI
2
3
LD
VS
U6433B
REL
VS
4
OSC
OSC
Table 2-1.
Pin Description
Pin
1
Symbol
GND
VS
Function
IC ground
2
Supply voltage
Relay driver
Oscillator
3
REL
OSC
OSC
VS
4
5
Oscillator
6
Supply voltage
7
LD
Lamp failure detection
Start input (49a)
8
SI
3
4810B–AUTO–10/05
3. Functional Description
3.1
Pin 1, GND
The integrated circuit is protected against damage via resistor R4 to ground (–31) in the case of
battery reversal.
An integrated protection circuit together with external resistances R2 and R4 limits the current
pulses in the IC.
3.2
3.3
3.4
Pin 2, Supply Voltage, VS – Power
The arrangement of the supply connections to pin 2 must be so as to ensure that, on the con-
nection printed circuit board (PCB), the resistance of VS to pin 6 is lower than that to pin 2.
Pin 3, Relay Control Output (Driver)
The relay control output is a high-side driver with a low saturation voltage and is capable of driv-
ing a typical automotive relay with a minimum coil resistance of 60Ω.
Pins 4 and 5, Oscillator
The flashing frequency, f1, is determined by the R1C1 components as follows (see Figure 1-1 on
page 2):
1
------------------------------------
f1 ≈
Hz
R1 × C1 × 1.5
where
C1 ≤ 47 µF
R1 + 6.8 kΩ to 510 kΩ
In the case of a lamp outage (see pin 7) the oscillator frequency is switched to the lamp outage
frequency f2 with f2 ≈ 2.2 × f1.
Duty cycle in normal flashing mode: 50%
Duty cycle in lamp outage mode: 40% (bright phase)
3.5
Pin 6, Supply Voltage, Sense
For accurate monitoring via the shunt resistor, a minimized layer resistance from point VS/shunt
to pin 6 is recommended.
3.6
Pin 7, Lamp Outage Detection
3.6.1
Control Signal Threshold 1 (49-mV Comparator K1)
The detection point for lamp failure can be calculated from the control signal threshold, typically
49 mV with VS = 12V. With a measuring resistance of R3 = 18 mΩ, the frequency change-over is
reached at a lamp load of 21W + 11.4W. The variation of the control signal threshold supply volt-
age takes into account the PTC characteristic of filament lamps.
4
U6433B
4810B–AUTO–10/05
U6433B
3.6.2
Control Signal Threshold 2 (8-mV Comparator K4)
A voltage drop between 49 mV to 8 mV at R3 shunt resistor lets the flasher work in frequency
doubling mode.
If the voltage drop decreases to a value below VR3MAX = 8 mV, frequency doubling is disabled.
This can be achieved either with a switch which bypasses the shunt resistor (for example, a spe-
cial hazard warning switch) or with a small lamp load.
The arrangement of the supply connections to pins 2 and 6 must ensure that, on the connection
PCB, the layer resistance from VS to pin 6 is lower than the resistance to pin 2.
Flasher operation starts with a lamp load of PL ≥ 1W.
3.7
Pin 8, Start Input
Start condition for flashing: the voltage at pin 8 has to be below the K3 threshold (flasher switch
closed).
Humidity and dirt may decrease the resistance between 49a and GND. If this leakage resistance
is > 5 kΩ, 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.
For proper start conditions, a minimum lamp wattage of 1W is required.
4. Absolute Maximum Ratings
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating
only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this
specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Reference point pin 1.
Parameters
Symbol
Value
Unit
Supply voltage, pins 2 and 6
VS
18
V
Surge forward current
tp = 0.1 ms, pins 2 and 6
tp = 300 ms, pins 2 and 6
tp = 300 ms, pin 8
1.5
1.0
30.0
A
A
mA
IFSM
Output current, pin 3
IO
0.3
A
Power dissipation
Tamb = 95°C, SO8
Ptot
340
560
mW
mW
Tamb = 60°C, SO8
Junction temperature
Tj
150
°C
°C
°C
Ambient temperature range
Storage temperature range
Tamb
Tstg
–40 to +105
–55 to +150
5. Thermal Resistance
Parameters
Symbol
Value
Unit
Junction ambient SO8
RthJA
160
K/W
5
4810B–AUTO–10/05
6. Electrical Characteristics
Typical values under normal operation of the application circuit shown in Figure 1-1 on page 2, VS = 12V (pins 2 and 6).
Tamb = 25°C, reference point ground (–31), unless otherwise specified.
Parameters
Test Conditions
Pins 2 and 6
Pins 2 and 6
Pins 2 and 6
Symbol
Min.
Typ.
Max.
16.5
8
Unit
V
Supply voltage range
Supply current, dark phase
Supply current, bright phase
VS
IS
9
4.5
7.0
mA
mA
IS
11
IO = 150 mA,
VS = 9V, pin 3
Relay output, saturation voltage
VO
1.0
0.1
V
Relay output reverse current
Relay coil resistance
Pin 3
IO
mA
Ω
RL
ton
R1
C1
60
Start delay
First bright phase
10
510
47
ms
kΩ
µF
Frequency determining resistor
Frequency determining capacitor
6.8
Normal flashing, basic frequency f1 not
including the tolerances of the external
components R1 and C1
Frequency tolerance
∆f1
–5
+5
%
Bright period
Basic frequency f1, VS = 9V to 15V
Control frequency f2, VS = 9V to 15V
Lamp failure, VS = 9V to 15V
∆f1
∆f2
f2
47
37
53
45
%
%
Bright period
Frequency increase
2.15 × f1
2.3 × f1
Hz
VS = 15V, pin 7
VS = 9V
VS = 12V
50
43
47
53
45
49
57
47
51
Control signal threshold 1
VR3
mV
Control signal threshold 2
Leakage resistance
Lamp load
VR3
Rp
2
10
5
mV
kΩ
W
49a to GND
PL
1
6
U6433B
4810B–AUTO–10/05
U6433B
7. Ordering Information
Extended Type Number
Package
SO8
Remarks
U6433B-MFPY
Tubed, Pb-free
U6433B-MFPG3Y
SO8
Taped and reeled, Pb-free
8. Package Information
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
1
4
9. Revision History
Please note that the following page numbers referred to in this section refer to the specific revision
mentioned, not to this document.
Revision No.
History
• Put datasheet in a new template
• Updated text to new style guide
• First page: Pb-free logo added
• Page 7: Ordering Information changed
4810B-AUTO-08/05
7
4810B–AUTO–10/05
Atmel Corporation
Atmel Operations
2325 Orchard Parkway
San Jose, CA 95131, USA
Tel: 1(408) 441-0311
Fax: 1(408) 487-2600
Memory
RF/Automotive
Theresienstrasse 2
Postfach 3535
74025 Heilbronn, Germany
Tel: (49) 71-31-67-0
Fax: (49) 71-31-67-2340
2325 Orchard Parkway
San Jose, CA 95131, USA
Tel: 1(408) 441-0311
Fax: 1(408) 436-4314
Regional Headquarters
Microcontrollers
2325 Orchard Parkway
San Jose, CA 95131, USA
Tel: 1(408) 441-0311
Fax: 1(408) 436-4314
1150 East Cheyenne Mtn. Blvd.
Colorado Springs, CO 80906, USA
Tel: 1(719) 576-3300
Europe
Atmel Sarl
Route des Arsenaux 41
Case Postale 80
CH-1705 Fribourg
Switzerland
Tel: (41) 26-426-5555
Fax: (41) 26-426-5500
Fax: 1(719) 540-1759
Biometrics/Imaging/Hi-Rel MPU/
High Speed Converters/RF Datacom
Avenue de Rochepleine
La Chantrerie
BP 70602
44306 Nantes Cedex 3, France
Tel: (33) 2-40-18-18-18
Fax: (33) 2-40-18-19-60
BP 123
38521 Saint-Egreve Cedex, France
Tel: (33) 4-76-58-30-00
Fax: (33) 4-76-58-34-80
Asia
Room 1219
Chinachem Golden Plaza
77 Mody Road Tsimshatsui
East Kowloon
Hong Kong
Tel: (852) 2721-9778
Fax: (852) 2722-1369
ASIC/ASSP/Smart Cards
Zone Industrielle
13106 Rousset Cedex, France
Tel: (33) 4-42-53-60-00
Fax: (33) 4-42-53-60-01
1150 East Cheyenne Mtn. Blvd.
Colorado Springs, CO 80906, USA
Tel: 1(719) 576-3300
Japan
9F, Tonetsu Shinkawa Bldg.
1-24-8 Shinkawa
Chuo-ku, Tokyo 104-0033
Japan
Tel: (81) 3-3523-3551
Fax: (81) 3-3523-7581
Fax: 1(719) 540-1759
Scottish Enterprise Technology Park
Maxwell Building
East Kilbride G75 0QR, Scotland
Tel: (44) 1355-803-000
Fax: (44) 1355-242-743
Literature Requests
www.atmel.com/literature
Disclaimer: The information in this document is provided in connection with Atmel products. No license, express or implied, by estoppel or otherwise, to any
intellectual property right is granted by this document or in connection with the sale of Atmel products. EXCEPT AS SET FORTH IN ATMEL’S TERMS AND CONDI-
TIONS OF SALE LOCATED ON ATMEL’S WEB SITE, ATMEL ASSUMES NO LIABILITY WHATSOEVER AND DISCLAIMS ANY EXPRESS, IMPLIED OR STATUTORY
WARRANTY RELATING TO ITS PRODUCTS INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, CONSEQUENTIAL, PUNITIVE, SPECIAL OR INCIDEN-
TAL DAMAGES (INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF PROFITS, BUSINESS INTERRUPTION, OR LOSS OF INFORMATION) ARISING OUT
OF THE USE OR INABILITY TO USE THIS DOCUMENT, EVEN IF ATMEL HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. Atmel makes no
representations or warranties with respect to the accuracy or completeness of the contents of this document and reserves the right to make changes to specifications
and product descriptions at any time without notice. Atmel does not make any commitment to update the information contained herein. Unless specifically provided
otherwise, Atmel products are not suitable for, and shall not be used in, automotive applications. Atmel’s products are not intended, authorized, or warranted for use
as components in applications intended to support or sustain life.
© Atmel Corporation 2005. All rights reserved. Atmel®, logo and combinations thereof, Everywhere You Are® and others, are registered trade-
marks or trademarks of Atmel Corporation or its subsidiaries. Other terms and product names may be trademarks of others.
Printed on recycled paper.
4810B–AUTO–10/05
相关型号：
©2020 ICPDF网 联系我们和版权申明