U2482B
| Model | U2482B |
| Description | Automotive Lamp Outage Monitor |
| PDF file | Total 11 pages (File size: 153K) |
| Chip Manufacturer | ETC |
U2481B/ U2482B
Block Diagram
V
B
20
REF
K1
IN
1K1
28 Ref
27
E1
+
–
I
T
I
T
V
B
K1
13 mV
Voltage drift
of comparator
threshold
I
T
= f (V
B
)
TELEFUNKEN Semiconductors
19
V
S
V
S
Power
on
Reset
POR
Stabilized
voltage
V
stab
= 5.2 V
I
T
Divider
REF
K2
IN
1K2
1
2
Ref K2 13 mV
E1
Cl
1
Cl
2
Clock 1 Clock 2
2-T
Osc
20-T
Osc
Oscillator
15
OSC
REF
K3
IN
1K3
IN
2K3
IN
3K3
IN
FK3
7
6
8
9
26
Ref K3 3.5 mV
E1
E2
E3
Cl
2
Up down counter
T = 1.2 s
Start
High at
forward counter end
High at
Start
return counter zero
Cl
1
Ref K4 3.5 mV
E1
14
OUT
Set
Out
Reset
V
S
REF
K4
IN
1K4
24
25
IN
FK5
16
REF
K5
IN
1K5
IN
2K5
4
3
5
VB
Ref K5 3.5 mV
E1
E2
+
–
Out
Reset
POR
Latch for
stoplamps
Set
K6 Ref
3.5 mV
Up down counter
T = 1.2 s
High at
Start
forward counter end
Start
High at
return counter zero
Cl
1
*
V
S
* Connection to
GND only for
U2482B (latch
disabled
E1
17
IN
FK6
22
REF
K6
21
IN
1K6
IN
F
23
REF
K7
IN
1K7
IN
2K7
IN
3K7
11
10
12
13
Ref K7
E1
E2
E3
3.5 mV
Cl
2
18
GND
94 8833
Figure 1.
2 (11)
Preliminary Information
Rev. A1: 21.08.1995
