®
TDE1747
TDF1747
INTERFACE CIRCUIT – RELAY AND LAMP – DRIVER
OPEN GROUND PROTECTION
HIGH OUTPUT CURRENT
ADJUSTABLE SHORT-CIRCUIT PROTEC-
TION TO GROUND
THERMAL PROTECTION WITH HYSTERE-
SIS TO AVOID THE INTERMEDIATE OUT-
PUT LEVELS
LARGE SUPPLY VOLTAGE RANGE : + 10 V
TO + 45 V
SHORT-CIRCUIT PROTECTION TO V
CC
DESCRIPTION
The TDE/TDF1747 is a monolithic comparator de-
signed for high current and high voltage applica-
tions, specifically to drive lamps, relays, stepping
motors.
These device is essentially blow-out proof. Cur-
rent limiting is available to limit the peak output
current to safe values, the adjustment only re-
quires one external resistor. In addition, thermal
shut down is provided to keep the I.C. from over-
heating. If internals dissipation becomes too
great, the driver will shut down to prevent exces-
sive heating. TDE1747 has an open ground pro-
tection. The output is also protected from short-
circuits with the positive power supply.
PIN CONNECTIONS
(Top view)
Minidip
(DP)
SO14
(FP)
ORDERING NUMBERS:
TDE1747DP
TDE1747FP
TDF1747DP
The device operates over a wide range of supply
voltages from standard
±
15 V operational ampli-
fier supplies down to the single + 12 V or + 24
used for industrial electronic systems.
Minidip
SO14
September 2003
1/11
This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
TDE1747 - TDF1747
ABSOLUTE MAXIMUM RATINGS
Symbol
V
CC
V
ID
V
I
I
O
P
tot
T
stg
T
oper
Supply Voltage
Differantial Input Voltage
Input Voltage
Output Current
Power Dissipation (T
amb
= + 25
°C)
Storage Temperature Range
Operating Ambient Temperature Range
TDE1747
TDF1747
Parameter
Value
50 *
50
50
1
Internally Limited
– 65 to + 150
– 25 to + 85
– 40 to + 85
Unit
V
V
V
A
W
°C
°C
°C
(*) 60V, t â 10ms
THERMAL CHARACTERISTICS
Symbol
R
th(j-c)
R
th(j-a)
R
th
R
th
Parameter
Maximum Junction-case Thermal Resistance
Maximum Junction-ambient Thermal Resistance
Junction-ceramic Substrate (case glued to substrate)
Junction-ceramic Substrate (case glued to substrate, substrate temperature
maintened constant)
SO14
SO14
Value
50
120
90
65
Unit
°C/W
°C/W
°C/W
°C/W
SCHEMATIC DIAGRAM
2/11
TDE1747 - TDF1747
TEST CIRCUIT
SIMPLIFIED CIRCUIT
3/11
TDE1747 - TDF1747
ELECTRICAL CHARACTERISTICS
T
j
= – 25 to +85
°C,
V
CC
= 8 to 45 V, unless otherwise specified
(note 1).
Symbol
V
IO
I
IB
I
CC
Parameter
Input Offset Voltage - (note 2)
Input Bias Current
Supply Current (V
CC
= + 24 V, I
O
= 0)
High Level
Low Level
Min.
–
–
–
–
Typ.
2
0.1
4
2
Max.
50
1.5
6
4
Unit
mV
mA
mA
mA
V
I(max)
I
SC
Common-mode Input Voltage Range
Short-circuit Current Limit
(T
amb
= + 25
°C,
V
CC
= + 24)
R
SC
= 1.5
Ω
R
SC
=
∞
Output Saturation Voltage (output high)
(R
SC
= 0, V
I
+–V
I
–
≥
50 mV)
I
O
= 300 mA, T
j
= + 25
°C
T
j
= + 150
°C
Low Level Output Current
(V
O
= 0, V
CC
= + 24 V)
T
j
= + 25
°C
2
–
V
CC
–2
V
TDE1747
–
–
480
35
–
50
mA
mA
V
CC
–V
O
–
–
1.15
1.05
1.4
1.3
V
V
I
OL
–
0.01
10
µA
Notes :
1) For operating at high temperature, the TDE/TDF1747, must be derated based on a + 150 C maximum junction temperature and a
junction-ambient thermal resistance of 120 °C/W for Minidip and 100 °C/W for the SO14.
2) The offset voltage given is the maximum value of input voltage required to drive the output voltage within 2 V of the ground or the supply
voltage.
Figure 1:
Available Output Current vs. Limiting
Resistor
Figure 2:
Peak Short-circuit Output Current vs.
Limiting Resistor
4/11
TDE1747 - TDF1747
Figure 3:
Short-circuit Current vs. Case
Temperature
Figure 4:
Minimum Limiting Resistor Value vs.
Supply Voltage
Figure 5:
Output Current vs. Output Saturation
Voltage
Figure 6:
Supply Current vs. Supply Voltage
Figure 7:
Supply Current vs. Junction
Temperature
Figure 8:
Safe Operating Area (non repetitive
surge)
5/11
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