TDE1747
Interface circuit - relay and lamp-driver
Features
■
■
■
■
■
■
Open ground protection
High output current
Adjustable short-circuit protection to ground
Thermal protection with hysteresis to avoid the
intermediate output levels
Large supply voltage range: + 8V to +45V
Short-circuit protection to V
CC
SO14
DIP-8
Description
The TDE1747 is a monolithic comparator
designed for high current and high voltage
applications, specifically to drive lamps, relays,
stepping motors.
This device is essentially blow-out proof. Current
limiting is available to limit the peak output current
to safe values.
Adjustment only requires one external resistor. In
addition, thermal shut down is provided to keep
the IC from overheating. If internal dissipation
becomes too high, the driver will shut down to
prevent excessive heating. TDE1747 has an open
ground protection. The output is also protected
from shortcircuits with the positive power supply.
The device operates over a wide range of supply
voltages from standard
±
15V operational
amplifier supplies down to the single +12V or
+24V used for industrial electronic systems.
.
Order codes
Part number
TDE1747DP
TDE1747FP
TDE1747FPT
Temp range,
°
C
-25°C to +85°C
-25°C to +85°C
-25°C to +85°C
Package
DIP-8
SO14
SO14
Packing
Tube
Tube
Tape and reel
September 2006
Rev 1
1/17
www.st.com
17
Contents
TDE1747
Contents
1
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1
1.2
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2
3
4
5
6
7
8
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pin connections and schematic diagrams . . . . . . . . . . . . . . . . . . . . . . . . . 5
Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Typical applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2/17
TDE1747
Maximum ratings
1
1.1
Table 1.
Symbol
V
CC
V
I
Maximum ratings
Absolute maximum ratings
Absolute maximum ratings
Parameter
Supply voltage
Input voltage
Differential input voltage
Output current
Power dissipation (T
A
= +25°C)
Operating Free–air Temperature Range
Storage temperature range
Value
50
(1)
50
50
1
Internally Limited
– 25 to + 85
– 65 to + 150
Unit
V
V
V
A
W
°C
°C
V
ID
I
O
P
tot
T
oper
T
STG
1. 60V, t
≤
10ms
1.2
Table 2.
Symbol
R
thJA
R
thJC
R
th
R
th
Thermal data
Thermal data
Description
Thermal Resistance Junction-ambient
Thermal Resistance Junction-case
Junction-ceramic Substrate (case glued to substrate) SO14
Junction-ceramic Substrate (case glued to substrate, substrate
temperature maintained constant) SO14
Value
120
50
90
65
Unit
°C/W
°C/W
°C/W
°C/W
3/17
Electrical characteristics
TDE1747
2
Electrical characteristics
T
J
=
−
25 to +85°C, V
CC
=
8 to 45 V, unless otherwise specified (note 1)
Parameter
Min
–
–
Typ
2
0.1
Max
50
1.5
Unit
mV
mA
Table 3.
Symbol
V
IO
I
IB
I
CC
V
I(max)
Electrical characteristics
Input offset voltage
(1)(2)
Input bias current
Supply Current (V
CC
= +24V, I
O
= 0)
High level
Low level
Common–mode input voltage range
Short–circuit Current Limit (T
A
= 25°C, V
CC
= +24V)
–
–
2
4
2
–
6
4
V
CC
–2
mA
mA
V
I
SC
R
SC
= 1.5Ω
R
SC
=
∞
Output saturation voltage (output low)
(V
I+
– V
I-
≥
50mV, R
SC
= 0, I
O
= 300mA, )
T
J
= + 25°C
T
A
= + 25°C
–
–
480
35
–
50
mA
mA
V
CC
–V
O
–
–
–
1.15
1.05
0.01
1.4
1.3
10
V
V
µA
I
OL
Output leakage current (output high)
(V
O
= 0, V
CC
= +24V, T
A
= + 25°C)
1. For operating at high temperature, the TDE1747, must be derated based on a +150°C maximum junction temperature and
junction-ambient thermal resistance of 120°C/W for DIP-8 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 2V of the ground
or the supply voltage.
4/17
TDE1747
Pin connections and schematic diagrams
3
Pin connections and schematic diagrams
Figure 1.
Pin connections
(top views)
Figure 2.
Schematic diagram
5/17
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