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TDE1787
INTERFACE CIRCUIT (RELAY AND LAMP
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TDE1767, A
TDE1787, ASeptember 2003 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
amplifiers designed for high current and high volt-
age applications, specifically to drive lamps, re-
lays, 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 over-
heathing.
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 alternative-
ly switch-on and off until the overload is removed.
The devices operates over a wide range voltages
from standard 15V operational amplifier supplies
to the single +6V or +48V used for industrial elec-
tric systems. Input voltages can be higher than in
the VCC.
An alarm output suitable for driving a LED is pro-
vited. 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.
INTERFACE CIRCUIT (RELAY AND LAMP-DRIVER)
TDE1767, A TDE1787, A2/10
ABSOLUTE MAXIMUM RATINGS
SCHEMATIC DIAGRAM
EQUIVALENT SCHEMATIC
3/10
TDE1767, A TDE1787, A
Figure 1.
ELECTRICAL CHARACTERISTCS (Unless otherwise specified)
TDE1767A: - 25°C ≤ Tamb ≤ 85°C, 6V ≤ VCC ≤ 55V, Io ≤ 500mA, Tj ≤ 150°C
TDE1767: - 25°C ≤ Tamb ≤ 85°C, 6V ≤ VCC ≤ 45V, Io ≤ 500mA, Tj ≤ 150°C
TDE1787A: - 25°C ≤ Tamb ≤ 85°C, 6V ≤ VCC ≤ 55V, Io ≤ 300mA, Tj ≤ 150°C
TDE1787: - 25°C ≤ Tamb ≤ 85°C, 6V ≤ VCC ≤ 45V, Io ≤ 300mA, Tj ≤ 150°C
TDE1767, A TDE1787, A4/10
Note: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. Input voltage range is indipendent of the supply voltage.
Figure 2. Peak Short-circuit vs Limiting
Resistor
Figure 3. Available Output Current vs Limiting
Resistor
Figure 4. Power Supply Current (pin 4)
Figure 5. Output Saturation Voltage vs Output
Current
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TDE1767, A TDE1787, A
Figure 6. Output Transistor Safe Operating
Area (pulsed))
Figure 7. Normal Operating Area (short circuit
protected)
Figure 8. Current Sinking
Figure 9. Current Sourcing
Figure 10. Response Time
Figure 11. Response Time
TDE1767, A TDE1787, A6/10
Figure 12. Test Circuit
TYPICAL APPLICATION
Figure 13. Open Load Detection.4
Figure 14. Driving Lamps, Relays, Etc...
