TDF1778SP STMicroelectronics, TDF1778SP Datasheet

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TDF1778SP

Manufacturer Part Number
TDF1778SP
Description
MOSFET & Power Driver ICs Dual Relay/Lamp
Manufacturer
STMicroelectronics
Type
Dual 2-A Source Driverr
Datasheet

Specifications of TDF1778SP

Supply Current
20 mA
Maximum Operating Temperature
85 C
Mounting Style
Through Hole
Package / Case
Multiwatt-11
Minimum Operating Temperature
- 40 C
Lead Free Status / Rohs Status
Lead free / RoHS Compliant

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Part Number:
TDF1778SP
Manufacturer:
ST
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DESCRIPTION
The TDF1778 is a dual source driver delivering high
output currents and capable to drive any type of
loads (Electrovalves, contactors, lamps).
This device is essentially blow-out proof, each out-
put is protected against short-circuits. If internal dis-
sipation becomes too high, drivers will shut down to
prevent excessive heating. An ”ALARM” output is
provided to indicate the action of the thermal protec-
tion. To reactivate the power outputs, the reset input
must be forced to low state.
”SENSE” information of both power outputs are
ORed together and then processed internally.
A ”STROBE” input is also provided to offer the pos-
sibility of disabling the power outputs.
PIN CONNECTION
April 1993
OUTPUT CURRENT UP TO 2.5 A
WIDE RANGE OF SUPPLY VOLTAGES : + 8 to
+ 32 V
CAN WITHSTAND OVERVOLTAGES OF AS
HIGH AS 60 V BETWEEN V
INTERNAL ZENER DIODE PROVIDES FAST
SWITCHING OF INDUCTIVE LOADS
OUTPUT VOLTAGE CAN BE LOWER THAN
GROUND
CC
AND GROUND
1
2
3
4
5
6
7
8
9
10 - Reset input
11 - Input 1
DUAL 2-A SOURCE DRIVER
- Output 1
- VCC
- Output 2
- N.C.
- Strobe
- Ground
- Input 2
- Sense output
- Alarm output
ORDERING NUMBER : TDF1778SP
MULTIWATT11
TDF1778
1/10

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TDF1778SP Summary of contents

Page 1

... ORed together and then processed internally. A ”STROBE” input is also provided to offer the pos- sibility of disabling the power outputs. PIN CONNECTION April 1993 DUAL 2-A SOURCE DRIVER AND GROUND ORDERING NUMBER : TDF1778SP 1 - Output VCC 3 - Output ...

Page 2

TDF1778 BLOCK DIAGRAM ABSOLUTE MAXIMUM RATINGS Symbol V Supply Voltage Input Voltage (pins 7, 10 and 11) I reset V Strobe Input Voltage strobe I Output Current O P Power Dissipation tot T Operating Ambient Temperature ...

Page 3

ELECTRICAL CHARACTERISTICS (V Symbol V Power Supply Voltage CC I Power Supply Current (pin 6 Logic Input Voltage (pins 7, 10, 11 Logic Input Threshold (pin High Level Input Current ...

Page 4

TDF1778 4/10 ...

Page 5

OPEN LOAD DETECTION Open l oad detection is possi ble during the hachur ed aeras. SHORT CIRCUIT CONDITIONS WAVEFORMS WITH AUTOMATIC RESET/RESET = 0 TDF1778 5/10 ...

Page 6

TDF1778 SHORT CIRCUIT WAVEFORMS WITH CONTROLLED RESET/RESET = 1 DEMAGNETIZATION UNDER INDUCTIVE LOAD 6/10 ...

Page 7

TYPICAL APPLICATION TYPICAL APPLICATION WITH TDF1778 TWO INDUCTIVE LOADS MAIN FEATURES This application protected against short circuits. The load disconnection is detected when inputs E1 and E2 are low and the sense output is high. ...

Page 8

TDF1778 TDF1778 HIGH CURRENT APPLICATION WITH INDUCTIVE LOAD MAIN FEATURES This application has the same features as the dual 2 A -12 V application. 8/10 Load : mH ...

Page 9

MULTIWATT11 PACKAGE MECHANICAL DATA DIM. MIN 0.49 F 0.88 G 1.45 G1 16. 21.9 L1 21.7 L2 17.4 L3 17.25 L4 10.3 L7 2.65 M 4.25 M1 4.73 S 1.9 S1 ...

Page 10

TDF1778 Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from ...

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