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TDF1779A
DUAL 2-A SOURCE DRIVER
.OUTPUTCURRENTUPTO2. .WI .CAN .OUTPUTVOLTAGECANSWI ."
5A DE RANGE OF SUPPLY VOLTAGE : + 8 V TO + 26 V WITHSTAND OVERVOLTAGES OF AS HIGH AS 60 V BETWEEN VCC AND GROUND NG TO LOWER THAN GROUND SENSE" AND "ALARM" OUTPUTS ARE OPEN COLLECTOR OUTPUTS
MULTIWATT-11
DESCRIPTION The TDF1779A is a dual source driver delivering hihg outputcurrents and the capabilityto drive highly inductive loads (Electrovalves, contractors, relays...). 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
ORDERING NUMBER : TDE 1779ASP
12345678910 11 Tab is connected to pin 6
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
MAXIMUM RATINGS
Symbol VCC VI , Vreset Vstrobe IO Ptot Toper Supply Voltage Input Voltage (Pins 7, 10 and 11) Strobe Input Voltage Output Current Power Dissipation Operating Ambient temperature Range arameter Value 35 V (60 V/10 ms) - 30 to + 50 - 0.5 to VCC Internally Limited Internally Limited - 40 to + 85 Unit V V V A W C
THERMAL CHARACTERISTICS
Symbol Rth (j-c) R th (j-a) Parameter Junction-case Thermal Resistance Junction-ambient Thermal Resistance Max. Max. Value 3 40 Uni C/W C/W
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ELECTRICAL OPERATING CHARACTERISTICS (VCC = + 24V, -40oC < Tj < + 85oC, unless otherwise specified)
Symbol VCC ICC VIL VIH VI IIH IIL VCC - V01 VCC - V02 IOL VCC - V01 VCC - V02 IO1, IO2 IO Alarme IO Sense IIH Sense Power Supply Voltage Power Supply Current (pin 6), IO1 =IO2 = 2A Logic Input Voltage (pin 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) V I = + 0.8V Off State Output Voltage (pins 8,9) |(8) = |(9) = 2 mA Output Saturation Voltage (V(7) high, V(11) High, IO = 2A) Low Level Output Current pins 1,3) V(7) Low, V(11) Low, VO = 0V Switch-off Output Voltage (inductive load) Note 1 Available Ouptut Current (pins 1,3), V(7) high, V(11p) high, VCC - VO = 26V, Tj = 25C Available "Alarme" Output Current, V(9) = + 4V Available "Sense Ouptut Current, V(8) = + 4V Output Sensing high Level Input Current (pins 1,3) VI = +2V Parameter Min. 8 2 -5 10 4 4 Typ. 0.8 20 0 1.5 400 8 8 1 Max. 26 20 0.8 50 +5 0.4 1.8 1000 45 2 Unit V mA V V A A V V A V mA mA mA mA
Note 1 : An external discharge circuit is required for inductive loads
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AVAILABLE OUTPUT CURRENT OUTPUT SATURATION VOLTAGE
AVAILABLE ALARM OR SENSE OUTPUT CURRENTS
POWER SUPPLY CURRENT
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TYPICAL APPLICATION WITH TDF1779A TWO LOADS 12 V - 2 A
Load : RC = 6 The external Zener diode must dissipate the power stored in the inductance LC. R1min = VCC/4 mA, R2min = VCC/4 mA, Rmax = VCC/1 mA.
MAIN FEATURES This application is protected against for short circuit and overload. The load disconnection is detected when inputs E1 and E2 are low and the sense output is high. When thermal protection is actived the pin 9 is low. Inputs are TTL compatible. Sense output, Alarm output are open collector.
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TDF1779A HIGHT CURRENT APPLICATION WITH LOAD 12 V - 4 A
Load : RC = 3 The external Zener diode must dissipate the power stored in the inductance Lc. R1min = VCC/4 mA, R2min = VCC/4 mA, 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 4.55 5.08 17.5 10.7 22.2 22.1 0.49 0.88 1.45 16.75 19.6 20.2 22.5 22.5 18.1 17.75 10.9 2.9 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 0.179 0.200 0.689 0.421 0.874 0.87 1.7 17 1 0.55 0.95 1.95 17.25 0.019 0.035 0.057 0.659 0.772 0.795 0.886 0.886 0.713 0.699 0.429 0.114 0.191 0.214 0.102 0.102 0.152 0.067 0.669 mm TYP. MAX. 5 2.65 1.6 0.039 0.022 0.037 0.077 0.679 MIN. inch TYP. MAX. 0.197 0.104 0.063
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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 MULTIWATT11(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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