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TDF1747DP
INTERFACE CIRCUIT
TDE1747
TDF1747INTERFACE 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 VCC
DESCRIPTIONThe 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.
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.
PIN CONNECTIONS (Top view)
ABSOLUTE MAXIMUM RATINGS(*) 60V, t â 10ms
SCHEMATIC DIAGRAM
THERMAL CHARACTERISTICS
TDE1747 - TDF17472/11
SIMPLIFIED CIRCUIT
TEST CIRCUIT
TDE1747 - TDF1747
ELECTRICAL CHARACTERISTICS Tj = – 25 to +85 °C, VCC = 8 to 45 V, unless otherwise specified(note 1).
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. LimitingResistor
Figure 2: Peak Short-circuit Output Current vs.Limiting Resistor
TDE1747 - TDF17474/11
Figure 7: Supply Current vs. JunctionTemperature
Figure 8: Safe Operating Area (non repetitivesurge)
Figure 3: Short-circuit Current vs. CaseTemperature
Figure 4: Minimum Limiting Resistor Value vs.Supply Voltage
Figure 5: Output Current vs. Output SaturationVoltage
Figure 6: Supply Current vs. Supply Voltage
TDE1747 - TDF1747
TYPICAL APPLICATIONS
Figure 9: Response Time
Figure 10: Base Circuit
TDE1747 - TDF17476/11
