TDE1767, A
TDE1787, A
INTERFACE CIRCUIT (RELAY AND LAMP-DRIVER)
March 1993
OPEN GROUND PROTECTION
HIGH OUTPUT CURRENT
ADJUSTABLE SHORT-CIRCUIT PROTECTION
INTERNAL THERMAL PROTECTION WITH
EXTERNAL RESET
LARGE SUPPLY VOLTAGE RANGE
ALARM OUTPUT
INPUT VOLTAGE CAN BE HIGHER THAN V
CC
OUTPUT VOLTAGE CAN BE LOWER THAN
GROUND (V
CC
- V
O
V
CC
[max])
DESCRIPTION
The TDE1767, A/TDE1787, A are a monolithic am-
plifiers designed for high current and high voltage
applications, specifically to drive lamps, relays,
stepping motors.
The devices are assentially blow-out proof. The
output is prois protected from short-circuits with the
positive supply or drive. In addition thermal shut
down is provited to keep the IC from overheathing.
If internal dissipation becomes too high, the driver
will shut down to prevent excessive heating. The
output stays null after the overheating is off, if the
reset input is low. If high the output will alternatively
switch-on and off until the overload is removed.
The devices operates over a wide range voltages
from standard 15 V operational amplifier supplies
to the single +6V or +48V used for industrial electric
systems. Input voltages can be higher than in the
V
CC
.
An alarm output suitable for driving a LED is
provited. This LED, normally on (if referred to
ground), will die out or flash during an overload
depending on the state of the reset input.
The output is low in open ground conditions.
PIN CONNECTION (top view)
Symbol
Parameter
Value
Unit
R
th (j - c)
Maximum Junction-case Thermal Resistance
30
C/W
R
th (j - a)
Maximum Junction-ambient Thermal Resistence
80
C/W
THERMAL DATA
* Devices bonded on a 40 cm2 glass-epoxy printed circuit 0.15 cm thick with 4 cm2 of copper.
Minidip
ORDERING NUMBERS : TDE1767 DP
TDE1767 ADP
TDE1787 DP
TDE1787 ADP
1/10
2/10
SCHEMATIC DIAGRAM
EQUIVALENT SCHEMATIC
Symbol
Parameter
TDE1767A/TDE1787A
TDE1767/TDE1787
Unit
V
CC
Supply Voltage
60
50
V
V
ID
Input Differential Voltage
60
50
V
V
l
Input Voltage
- 10 to + 60
- 10 to + 50
V
I
O
Output Current
1.3
1.2
A
V
l(reset)
Reset Input Voltage
- 0.5 to + 60
- 0.5 to + 50
V
I
OA
Alarm Output Current
- 10 to + 20
- 10 to + 20
mA
P
tot
Power Dissipation
Internally Limited
mW
T
oper
Operating Ambient Temperature
Range
- 25 to + 85
- 25 to + 85
C
T
stg
Storage Temperature Range
- 65 to + 150
- 65 to + 150
C
ABSOLUTE MAXIMUM RATINGS
TDE1767,A-TDE1787,A
ELECTRICAL CHARACTERISTICS (Unless otherwise specified)
TDE1767A: - 25
C
T
amb
+ 85
C, + 6 V
V
CC
+ 55 V, I
o
500 mA, T
j
+ 150
C
TDE1767:
- 25
C
T
amb
+ 85
C, + 6 V
V
CC
+ 45 V, I
o
500 mA, T
j
+ 150
C
TDE1787A: - 25
C
T
amb
+ 85
C, + 6 V
V
CC
+ 55 V, I
o
300 mA, T
j
+ 150
C
TDE1767A: - 25
C
T
amb
+ 85
C, + 6 V
V
CC
+ 45 V, I
o
300 mA, T
j
+ 150
C
Symbol
Parameter
Min.
Typ.
Max.
Unit
V
IO
Input Offset Voltage - (note 1)
2
50
mV
I
CC
Power Supply Current (measured on pin 4)
mA
Output High (T
amb
= + 25
C)
-
5.8
8
Output High (V
CC
= V
CC(max)
, T
j
= + 150
C)
-
5
7
Output Low (V
CC
= V
CC(max)
, T
amb
= + 25
C)
-
1.5
4
I
IB
Input Bias Current
-
15
100
A
V
CM
Common-mode Input Voltage Range
TDE1787A, TDE1767A
TDE1787, TDE1767
1
1
-
-
60
45
V
V
l
Input Voltage Range (V
ref
+ 1 V)
(figure 1, note 2)
TDE1787A, TDE1767A
TDE1787, TDE1767
0
0
-
-
60
45
V
I
SC
Short-circuit Output Current
(V
CC
= + 35 V, t = 10 ms)
mA
R
SC
= 0.22
R
SC
= 0.33
TDE1767A
TDE1787A
-
-
700
380
-
-
V
sense
Output Limit Sense Voltage : V
O
= V
CC
- 2 V, t = 10ms
(V
O
= V
CC
- 2 V)
: V
O
= 0 V, t = 10 ms
130
120
150
140
170
165
mV
V
O(sat)
Output Saturation Voltage (output high V
l
+
- V
l
-
50 mV,
R
SC
= 0, V
CC
= + 30 V)
V
T
j
= + 25
C
T
j
= + 150
C
TDE1787A, TDE1767A
TDE1787, TDE1767
TDE1787A, TDE1767A
TDE1787, TDE1767
-
-
-
-
1
1
1.1
1.1
1.1
1.2
1.2
1.3
I
OL
Output Leakage Current (output low)
-
-
100
A
I
A
Available Alarm Output Current
Output Source Current (VAH = V
CC
- 2.5 V)
Output Slnk Current (in thermal shut-down) V
A
= 1.4 V
-4
5
-5
10
-
-
mA
I
reset
Reset Input Current
-
2
40
A
V
th (reset)
Reset Threshold
-
1.4
-
V
-
Output Leakage Current (open ground)
-
10
-
A
Figure 1.
Notes: 1. The offset voltage given is the maximum value of different input voltage reguired to drive the output voltage whitin 2 V of the
ground or the supply voltage.
2. Input voltage range is indipendent of the supply voltage.
3/10
TDE1767,A-TDE1787,A
4/10
Figure 2. PEAK SHORT-CIRCUIT vs
LIMITING RESISTOR.
Figure 3. AVAILABLE OUTPUT CURRENT vs
LIMITING RESISTOR.
Figure 4. POWER SUPPLY CURRENT (pin 4).
Fig.ure 5. OUTPUT SATURATION VOLTAGE vs
OUTPUT CURRENT.
Figure 6. OUTPUT TRANSISTOR
SAFE OPERATING AREA (pulsed)
Figure 7. NORMAL OPERATING AREA
(short circuit protected)
TDE1767,A-TDE1787,A
Figure 8. CURRENT SINKING.
Figure 9. CURRENT SOURCING
Figure 10. REPONSE TIME
Figure 11. REPONSE TIME
Figure 12 : Test Circuit.
ALARM OUTPUT CAPABILITY CURRENT
5/10
TDE1767,A-TDE1787,A
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