Features
•Lamp Outage Indication for Car and Trailer
•Temperature and Supply Voltage Compensated Flashing Frequency
•Relay Driver Output with High Current Carrying Capacity and Low Saturation Voltage
•Minimum Lamp Load for Flasher Operation > 10W
1. Description
The bipolar integrated Atmel® circuit ATA2069 is designed for the use in relay-oper-
ated automotive flasher modules and makes it possible to detect the outage of flasher
bulbs on the vehicle itself and also on a trailer.
Vehicles with a trailer hook are equipped with additional pilot lamps in the dashboard.
Atmel ATA2069 is off (i.e., the relay is deactivated) as long as the flasher switch (at
contact +49a) is open. As soon as this switch is closed, the IC starts reliably with the
bright phase.
There are two thresholds integrated: one threshold is defined to be 21 + 10W and is
designed for the lamp outage detection of 1 of 2 lamps. If the current is below this
threshold, the IC switches to frequency doubling, just like the standard flashers (e.g.
Atmel U2043B).
The other threshold is defined to be 42 + 10W and is designed for the outage detec-
tion of 1 of 3 lamps; if this happens, the additional trailer pilot lamp is switched off, but
there is no frequency doubling. 50 ms after the start of the bright phase, the compara-
tor measures the voltage drop at the shunt and latches this value for the rest of the
bright phase. The output of this pilot lamp (pin 8) is short-circuit protected against
GND. In case of a short circuit the external transistor is switched off after 52ms for the
rest of the current flasher cycle, but it is enabled again for the next cycle.
Flasher with
Trailer Control
Atmel ATA2069
4917D–AUTO–03/11
2
4917D–AUTO–03/11
Atmel ATA2069
Figure 1-1. Block Diagram
VS - 57mV
3kΩ
150Ω
100Ω
K1
VS/2
K3
R1
C1
6
Relay
7348
5
RS
Q
VS - 11mV
+49
21W 21W 21W 21W5W 5W
Pilot
lamp
trailer
VS
+49
VS
VS - 111mV
40% of VS
K2
K4
K5
Timing Unit
R3 Shunt
R6 R5
R4
10Ω
R2
32V
4W
49a
1.5kΩ
20mΩ
21W
trailer
21W
trailer
1
2
3
4917D–AUTO–03/11
Atmel ATA2069
2. Pin Configuration
Figure 2-1. Pinning
GND
VS
REL
LD
OPL
SI
OSCR
OSCC
1
2
3
4
8
7
6
5
Table 2-1. Pin Description
Pin Symbol Function
1 GND IC ground
2 VS Supply Voltage
3 REL Relay driver
4 LD Lamp failure detection
5 OSCC Cap. oscillator
6 OSCR Res. oscillator
7 SI Start input (49a)
8 OPL Output pilot lamp
4
4917D–AUTO–03/11
Atmel ATA2069
3. 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.
Parameters Pin Symbol Value Unit
Supply voltage 2 VS16.5 V
Junction temperature TJ150 °C
Ambient temperature range Tamb –40 to +95 °C
Storage temperature range Tstg –55 to +150 °C
Thermal resistance junction
ambient SO8 Rthjc 160 K/W
4. Electrical Characteristics
Parameters Test Conditions Pin Symbol Min. Typ. Max. Unit
Supply voltage range 2 VS (+49a) 9 to 15 V
Relay output current 3 IRel 300 mA
Relay saturation voltage I = 130mA
I = 250mA 3V
Rel 1
1.5
V
V
Relay leakage current 3 IRelr 100 µA
Values for T = 25°C
Start delay ton 10 ms
Delay time for output OPL OPL tDel 45 55 ms
Switch off delay time output OPL
in case of short circuit OPL tDel 1.5 2.4 ms
Voltage threshold for short circuit
detection at output OPL OPL Vth 36 44 % of Us
Output current at OPL OPL IO10 25 mA
Saturation voltage at OPL OPL VSATO 300 mV
Control signal threshold K1 for
outage detection without trailer
operation
VS = 9V
VS = 13V
VS = 15V
Vk1
47.5
54.2
58
50
57
61
52.2
59.9
64.1
mV
mV
mV
Control signal threshold K4 for
outage detection with trailer
operation
VS = 9V
VS = 13V
VS = 15V
Vk4
96
109
115
98
111
118
100
113
120
mV
mV
mV
Frequency tolerance
Bright period
Bright period
Frequency increase
Leakage increase
Lamp load
Basic frequency
Frequency doubling
Lamp outage
49a to GND
Delta f1
Delta f1
Delta f2
f2
RI
PL
–5
47
37
2.15 × f
10
+5
53
45
2.3 × f
5
%
%
%
Hz
kΩ
W
5
4917D–AUTO–03/11
Atmel ATA2069
6. Package Information
5. Ordering Information
Extended Type Number Package Remarks
ATA2069-TAQY SO8 Taped and reeled, Pb-free
Package: SO 8
Dimensions in mm
specifications
according to DIN
technical drawings
Issue: 1; 15.08.06
Drawing-No.: 6.541-5031.01-4
14
85
0.2
5±0.2
3.8±0.1
6±0.2
3.7±0.1
4.9±0.1
3.81
0.4
1.27
0.1+0.15
1.4
6
4917D–AUTO–03/11
Atmel ATA2069
7. 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
4917D-AUTO-03/11
• Section 3 “Absolute Maximum Ratings” on page 4 changed
• Section 5 “Ordering Information” on page 5 changed
• Section 6 “Package Information” on page 5 changed
4917C-AUTO-10/07 • Section 5 “Ordering Information” on page 5 changed
4917B-AUTO-03/06 • Section 5 “Ordering Information” on page 5 changed
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