U2044B TEMIC Semiconductors, U2044B Datasheet

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U2044B

Manufacturer Part Number
U2044B
Description
Dual Output Flasher
Manufacturer
TEMIC Semiconductors
Datasheet

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TELEFUNKEN Semiconductors
Rev. A1, 25-Feb-97
Dual Output Flasher
Description
The integrated circuit U2044B is used in relay controlled
automotive flashers. With two output stages each side of
the vehicle is controlled separately. A left and a right
direction indicator input with only a small control current
makes switch contacts for small loads possible.
Features
D
D
D
D
Ordering Information
Pin Description
Pin
10
11
12
13
14
Temperature and supply voltage compensated
flashing frequency
Frequency doubling indicates lamp outage
Two relay driver outputs with high current-carrying
capacity and low saturation voltage
Minimum lamp load for flasher operation:
1
2
3
4
5
6
7
8
9
Extended Type Number
Symbol
U2044B-FP
SIHW
GND
OSC
OSC
CR1
CR2
OR1
OR2
SIL
SIR
LD
U2044B
V
V
V
S
S
S
Oscillator
Start input left
Start input right
Start input hazard warning
V
Control input relay 1
Control input relay 2
Lamp failure detection
V
IC ground
Output relay 1
V
Output relay 2
Oscillator
S
S
S
Function
w
1 W
Package
DIP14
SO14
The separate hazard warning input simplifies the
construction of the hazard switch. Lamp outage is indi-
cated by frequency doubling during direction mode.
Thanks to the extreme low current consumption U2044B
can be connected to the battery directly.
D
D
D
D
D
Very low susceptibility to EMI
Protection according to ISO/TR7637/1 level 4
Extremly low current consumption < 10
(@switches open)
Reverse polarity protection
Three control inputs: left, right and hazard warning
SIHW
OSC
CR2
SIL
CR1
SIR
V
S
1
2
3
5
6
4
7
Figure 1. Pinning
U2044B
Remarks
U2044B
10
14
13
12
11
9
8
OR2
Vs
GND
OSC
OR1
V
LD
S
m
12750
A
1 (6)

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U2044B Summary of contents

Page 1

... Dual Output Flasher Description The integrated circuit U2044B is used in relay controlled automotive flashers. With two output stages each side of the vehicle is controlled separately. A left and a right direction indicator input with only a small control current makes switch contacts for small loads possible. ...

Page 2

... U2044B Block Diagram 4 – – Relay for protection against continous reversed polarity: 1 Watt 2 Functional Description Pin 1 and Pin 14, Oscillator Flashing frequency determined by the R 1 components as follows (see figure 2 1 ...

Page 3

... Pin 12, Supply voltage power This pin supplies the relay drivers connected directly to the battery (Kl 30 internally clamped by a 27-V Z-diode. Symbol stg T amb Symbol R thJA R thJA U2044B and R limits the Value Unit 24 ...

Page 4

... U2044B Electrical Characteristics Typical values under normal operation in application circuit figure 1, V Reference point ground (–31 unless otherwise specified. amb Parameters Test Conditions / Pins Supply voltage range Supply current, switches open Output current for relay driver Saturation voltage ...

Page 5

... Package Information Package DIP14 Dimensions in mm 1.64 1. Package SO14 Dimensions in mm 8.75 0.4 1.27 7. TELEFUNKEN Semiconductors Rev. A1, 25-Feb-97 20.0 max 4.8 max 3.3 0.5 min 0.36 max 0.58 2.54 0.48 15.24 8 technical drawings according to DIN specifications 7 5.2 4.8 3.7 1.4 0.25 3.8 0.10 6.15 5.85 8 technical drawings according to DIN specifications 8 U2044B 7.77 7.47 6.4 max 9.8 8.2 13020 0.2 13035 5 (6) ...

Page 6

... 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 ...

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