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TDE1767ADP-TDE1767ADP.-TDE1767DP-TDE1787ADP-TDE1787DP
INTERFACE CIRCUIT (RELAY AND LAMP
TDE1767, A
TDE1787, AINTERF ACE 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 VCC
OUTPUT VOLTAGE CAN BE LOWER THAN
GROUND (VCC - VO ≤ VCC[max])
DESCRIPTIONThe 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
VCC.
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)
THERMAL DATA* Devices bonded on a 40 cm2 glass-epoxy printed circuit 0.15 cm thick with 4 cm2 of copper.
1/10
SCHEMATIC DIAGRAM
EQUIVALENT SCHEMATIC
ABSOLUTE MAXIMUM RATINGS
TDE1767,A-TDE1787,A
ELECTRICAL CHARACTERISTICS (Unless otherwise specified)
TDE1767A: - 25 °C ≤ Tamb ≤ + 85°C, + 6 V ≤ VCC ≤ + 55 V, Io ≤ 500 mA, Tj ≤ + 150°C
TDE1767: - 25 °C ≤ Tamb ≤ + 85°C, + 6 V ≤ VCC ≤ + 45 V, Io ≤ 500 mA, Tj ≤ + 150°C
TDE1787A: - 25 °C ≤ Tamb ≤ + 85°C, + 6 V ≤ VCC ≤ + 55 V, Io ≤ 300 mA, Tj ≤ + 150°C
TDE1767A: - 25 °C ≤ Tamb ≤ + 85°C, + 6 V ≤ VCC ≤ + 45 V, Io ≤ 300 mA, Tj ≤ + 150°C
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.
TDE1767,A-TDE1787,A
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
TDE1767,A-TDE1787,A
TYPICAL APPLICATION
Figure 13. Open Load Detection.
Figure 14. Driving Lamps, Relays, Etc...
Figure 15. Common Reset.
TDE1767,A-TDE1787,A
