TDE1767, A
TDE1787, A
INTERFACE CIRCUIT (RELAY AND LAMP-DRIVER)
March 1993
OPEN GROUND PROTECTION
HIGH OUTPUT CURRENT
ADJUSTABLESHORT-CIRCUIT PROTECTION
INTERNAL THERMAL PROTECTION WITH
EXTERNALRESET
LARGE SUPPLYVOLTAGERANGE
ALARMOUTPUT
INPUTVOLTAGECAN BE HIGHER THAN VCC
OUTPUT VOLTAGE CAN BE LOWER THAN
GROUND (VCC -V
O≤V
CC[max])
DESCRIPTION
The TDE1767,A/TDE1787, Aare a monolithic am-
plifiers designed for high current and high voltage
applications, specifically to drive lamps, relays,
steppingmotors.
The devices are assentially blow-out proof. The
output is prois protectedfromshort-circuitswith the
positive supply or drive. In addition thermal shut
down is provitedto keepthe IC fromoverheathing.
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 hightheoutputwillalternatively
switch-on and off until the overloadis removed.
The devices operates over a wide range voltages
from standard 15 V operational amplifier supplies
to thesingle +6V or+48Vusedforindustrialelectric
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 groundconditions.
PIN CONNECTION (top view)
Symbol Parameter Value Unit
Rth (j- c) Maximum Junction-case Thermal Resistance 30 °C/W
Rth (j -a) Maximum Junction-ambient Thermal Resistence 80 °C/W
THERMAL DATA
* Devices bonded ona 40cm2 glass-epoxy printed circuit 0.15 cm thick with 4 cm2 of copper.
Minidip
ORDERING NUMBERS : TDE1767 DP
TDE1767 ADP
TDE1787 DP
TDE1787 ADP
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