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參數(shù)資料
| 型號(hào)： | U243B-FP |
| 英文描述： | Warning or Car-Direction Indicator |
| 中文描述： | 警告或汽車，方向指示器 |
| 文件頁數(shù)： | 3/6頁 |
| 文件大?。?/td> | 88K |
| 代理商： | U243B-FP |
U243B
Preliminary Information
TELEFUNKEN Semiconductors
Rev. A1, 05-Sep-96
3 (6)
Electrical Characteristics
Typical values under normal operation in application circuit figure 1, V
S
(+49, Pins 2 and 6) = 12 V
Reference point ground (–31), T
amb
= 25
°
C, unless otherwise specified
Parameters
Test Conditions / Pin
Symbol
V
S
(+49)
Min
Typ
9 ... 15
Max
Unit
V
Supply voltage range
Supply current,
dark phase or stand-by
Supply current,
bright phase
Z–diode limitation
I
S2, 6
= 70 mA
Relay output,
saturation voltage
I
0
= 150 mA, V
S
= 9 V
Relay output,
reverse current
Relay coil resistance
Start delay
(first bright phase)
Frequency-determining
resistor
Frequency-determining
capacitor
Frequency tolerance (normal flashing, basic frequency
f
1
not including the tolerance of the external compo-
nents R
1
and C
t
)
Bright period
(basic frequency f
1
)
Bright period
(control frequency f
2
)
Frequency increase
(lamp failure)
Control-signal threshold
V
S
= 15 V
V
S
= 9 V
V
S
= 12 V
Transfer resistance
49a to common for
stand-by
Lamp load
Applications
Flashing generator, operation with smaller loads
(
≥
2 W)
By adding a resistor to the application circuit (figure 1),
defined operation with lamp loads
≥
2 W is possible. The
voltage drop across the resistor R
4
is generated by the
current flowing over the relay and should be about 15 mV.
With a relay current of 150 mA (relay resistance 73 Q),
this requires a resistance of R
4
= 100 m . The change of
Pins 2 and 6
Pins 2 and 6
I
S
4.5
8
mA
Pins 2 and 6
I
S
7.0
11
mA
Pins 2 and 6
V
S
23
V
Pin 3
Pin 3
V
O
1.0
V
I
O
R
L
0.1
mA
60
t
on
10
ms
R
t
6.8
510
k
C
t
47
F
f
1
–5
+5
%
f
1
47
53
%
f
2
37
45
%
f
2
2.15 f
1
2.3f
1
Pin 7
Pin 7
Pin 7
V
R3
V
R3
V
R3
85
66
76
91
71
81
97
76
87
mV
mV
mV
R
P
2
5
k
P
L
10
W
the operating point by 15 mV results in a corresponding
change of the control signal threshold by 15 mV. For a
lamp current of 2.7 A, a measuring resistance of
R
3
=
81 mV – 15 mV
2.7 A
= 25 m
results.
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