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TDF1778
DUAL 2-A SOURCE DRIVER
.OUTPUTCURRENTUPTO2. .WI .CAN .I .OUTPUT
5A DE RANGE OF SUPPLY VOLTAGES : + 8 to + 32 V WITHSTAND OVERVOLTAGES OF AS HIGH AS 60 V BETWEEN VCC AND GROUND NTERNAL ZENER DIODE PROVIDES FAST SWITCHING OF INDUCTIVE LOADS VOLTAGE CAN BE LOWER THAN GROUND
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 output is protected against short-circuits. If internal dissipation becomes too high, drivers will shut down to prevent excessive heating. An "ALARM" output is provided to indicate the action of the thermal protection. 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 possibility of disabling the power outputs. PIN CONNECTION
MULTIWATT11 ORDERING NUMBER : TDF1778SP
1 2 3 4 5 6 7 8 9 10 11
- Output 1 - VCC - Output 2 - N.C. - Strobe - Ground - Input 2 - Sense output - Alarm output - Reset input - Input 1
April 1993
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BLOCK DIAGRAM
ABSOLUTE MAXIMUM RATINGS
Symbol VCC VI , Vreset Vstrobe IO Ptot Toper Tj Supply Voltage Input Voltage (pins 7, 10 and 11) Strobe Input Voltage Output Current Power Dissipation Operating Ambient Temperature Range Junction Temperature Parameter Value 35 V (60 V/10 ms) - 30 to + 50 - 0.5 to VCC Internally Limited Internally Limited - 40 to + 85 + 150 Unit V V V A W C C
THERMAL DATA
Symbol Rth(j-c) R th(j-a) Parameter Junction-case Thermal Resistance Junction-ambient Thermal Resistance Max. Max. Value 3 40 Unit C/W C/W
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ELECTRICAL CHARACTERISTICS (VCC = + 24V, - 40oC < Tj < + 85oC, unless otherwise specified)
Symbol VCC ICC VIL VIH VI IIH IIL VOH VOL VCC - VO1 VCC - VO2 IOL VCC - VO1 VCC - VO2 IO1, IO2 IOalarm IOsense IIHsense VIHsense Power Supply Voltage Power Supply Current (pin 6), I01 = I02 = 2A Logic Input Voltage (pins 7, 10, 11) Logic Input Threshold (pin 5) High Level Input Current (pins 7, 10, 11) VI = + 2V Low Level Input Current (pins 7, 10, 11) VI = + 0.8V High Level Logic Output Voltage (pins 8, 9) I(8) = I(9) = - 30 A Low Level Logic Output Voltage (pins 8, 9) I(8) = I(9) = 2 mA Output Saturation Voltage (V(7) high, V(11) high, IO = 2A) Low Level Input Current (pins 1, 3) V(7) Low, V(11) Low, VO = 0V Switch-off Output Voltage (inductive load) Available Output Current (pins 1, 3), V(7) High, V(11) High, VCC - VO = 32V, Tj = 25C Available "Alarm" Output Current, V(9) = + 4V Available "Sense" Output Current, V(8) = + 4V Output Sensing High Level Input Current (pins 1, 3) VI = + 2V High Level "Sense" Input Voltage (pins 1, 3) - - - 40 - 100 - 4 4 - 0.8 8 8 1 1.9 - - - 2 2.5 mA mA mA V Parameter Min. 8 - - 2 - - -5 2.4 Typ. - - - - 0.8 20 0 4 - 1.5 400 44 - Max. 32 20 0.8 - - 50 +5 - V 0.4 V 1.8 1000 48 A V mA Unit V mA V V A A V
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OPEN LOAD DETECTION
Open l oad detection is possi ble during the hachur ed aeras.
SHORT CIRCUIT CONDITIONS WAVEFORMS WITH AUTOMATIC RESET/RESET = 0
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SHORT CIRCUIT WAVEFORMS WITH CONTROLLED RESET/RESET = 1
DEMAGNETIZATION UNDER INDUCTIVE LOAD
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TYPICAL APPLICATION
TYPICAL APPLICATION WITH TDF1778 TWO INDUCTIVE LOADS 2 A - 24 V
Load : LC = 80 mH, R C = 12 R max = VCC/1 mA
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.
When thermal protectionis activatedthe pin 9 islow. Inputs and outputs are TTL comptable.
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TDF1778 HIGH CURRENT APPLICATION WITH INDUCTIVE LOAD 24 V - 4 A
Load : LC = 80 mH, TC = 6 Rmax = VCC/2 mA
MAIN FEATURES This application has the same features as the dual 2 A -12 V application.
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MULTIWATT11 PACKAGE MECHANICAL DATA
DIM. MIN.
A B C D E F G G1 H1 H2 L L1 L2 L3 L4 L7 M M1 S S1 Dia1 21.9 21.7 17.4 17.25 10.3 2.65 4.25 4.73 1.9 1.9 3.65 0.49 0.88 1.45 16.75 19.6
mm TYP. MAX.
5 2.65 1.6 1 0.55 0.95 1.7 17 1.95 17.25 0.019 0.035 0.057 0.659 0.772 20.2 22.2 22.1 22.5 22.5 18.1 17.5 10.7 17.75 10.9 2.9 4.55 5.08 4.85 5.43 2.6 2.6 3.85 0.862 0.854 0.685 0.679 0.406 0.104 0.167 0.186 0.075 0.075 0.144
inch MIN. TYP. MAX.
0.197 0.104 0.063 0.039 0.022 0.037 0.067 0.669 0.077 0.679
0.795 0.874 0.87 0.886 0.886 0.713 0.689 0.421 0.699 0.429 0.114 0.179 0.200 0.191 0.214 0.102 0.102 0.152
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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 its use. No license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of SGS-THOMSON Microelectronics. (c) 1994 SGS-THOMSON Microelectronics - All Rights Reserved MULTIWATT (R) is a Registered Trademark of the SGS-THOMSON Microelectronics SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands - Singapore Spain - Sweden - Switzerland - Taiwan - Thaliand - United Kingdom - U.S.A.
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