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TDE1798DP
0.5A INTELLIGENT POWER SWITCH
TDE17980.5A INTELLIGENT POWER SWITCH
HIGH OUTPUT CURRENT 500mA
SHORT-CIRCUIT PROTECTION UP TO
VCC = +35V
INTERNAL THERMAL PROTECTION WITH
EXTERNAL RESET AND SYNCRONIZATION
CAPABILITY
OPEN GROUND PROTECTION
OUTPUT VOLTAGE CAN BE LOWER THAN
GROUND FOR FAST INDUCTIVE LOAD DE-
MAGNETIZATION
DIFFERENTIAL INPUTS FOR ANY LOGIC
SYSTEM COMPATIBILITY
INPUT VOLTAGE CAN BE HIGHER THAN VCC
LARGE SUPPLY VOLTAGE RANGE FROM
6V TO 35V
SINK AND SOURCE ALARM OUTPUTS
NO NEED FOR EXTERNAL CLAMPING DI-
ODE FOR DEMAGNETIZATION ENERGY UP
TO 150mJ
SEVERAL DEVICES CAN BE CONNECTED
IN PARALLEL
DESCRIPTIONThe TDE1798 is an interface circuit delivering
high currents and capable of driving any type of
loads.
The output is protected from short-circuits with
the positive supply or ground. In addition thermal
shut down is provided to keep the IC from over-
heating. If internal dissipation becomes too high,
the driver will shut down to prevent excessive
heating. The output stays null after the overload is
off, if the reset input is low. If high, the output will
alternatively switch on and off until the overload is
removed.
Higher current can be obtained by paralleling the
outputs of several devices. In this case, the de-
vices can be reactivated simultaneously after an
overload if their reset input are connected in par-
allel.
The device operates over a wide range of supply
voltages from standard ±15 operational amplifier
supplies to the single ±6V or +35V used for indus-
trial electronic systems. Input voltage can be
higher than the VCC. The output is low in open
ground conditions.
PIN CONNECTION (Top view)
BLOCK DIAGRAM
ABSOLUTE MAXIMUM RATINGS
TDE1798
THERMAL DATA
1) Devices bounded on a 40cm2 glass-epoxy printed circuit 0.15cm thick with 4cm2 of copper
ELECTRICAL CHARACTERISTICS (note 2)TDE -25°C ≤ Tj ≤ +85°C, 6V ≤ VCC ≤ +35V, Io ≤ 500mA (unless otherwise specified).
Notes:
2) For operating at high temperature, the TDE1798 must be derated based on a 150°C maximum junction temperature and the junction-ambientthermal resistance.
3) The offset voltage given is the maximum value of input differential voltage required to drive the output voltage within 2V of the ground or thesupply voltage;
4) Input voltage range is independent of the supply voltage;
5) The reference input can be the inverting or the non-inverting one.
TDE1798
TDE1798
TYPICAL APPLICATION AUTOMATIC RESET TYPICAL APPLICATION CONTROLLED RESET
(*) D1 and Z1 needed if the demagnetization energy is higher than 150mJ
SHORT CIRCUIT CONDITIONS WITH AUTOMATIC RESET
TDE1798
