TDF1779A DUAL 2-A SOURCE DRIVER .. . . . OUTPUT CURRENT UP TO 2.5 A WIDE RANGE OF SUPPLY VOLTAGE : + 8 V TO + 26 V CAN WITHSTAND OVERVOLTAGES OF AS HIGH AS 60 V BETWEEN VCC AND GROUND OUTPUT VOLTAGE CAN SWING TO LOWER THAN GROUND ”SENSE” AND ”ALARM” OUTPUTS ARE OPEN COLLECTOR OUTPUTS 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. MULTIWATT-11 ORDERING NUMBER : TDE 1779ASP PIN CONNECTION 12345678910 11 - Output 1 VCC Output 2 N.C. Strobe Ground Input 2 Sense output Alarm output Reset input Input 1 Tab is connected to pin 6 April 1993 1/9 TDF1779A BLOCK DIAGRAM MAXIMUM RATINGS Symbol VCC VI , Vreset arameter Value Supply Voltage Input Voltage (Pins 7, 10 and 11) V – 30 to + 50 V – 0.5 to VCC V IO Output Current Internally Limited A Ptot Power Dissipation Internally Limited W Toper Operating Ambient temperature Range – 40 to + 85 °C Vstrobe Strobe Input Voltage Unit 35 V (60 V/10 ms) THERMAL CHARACTERISTICS Symbol 2/9 Value Uni Rth (j-c) Junction-case Thermal Resistance Parameter Max. 3 °C/W R th (j-a) Junction-ambient Thermal Resistance Max. 40 °C/W TDF1779A ELECTRICAL OPERATING CHARACTERISTICS (VCC = + 24V, –40oC < Tj < + 85oC, unless otherwise specified) Symbol Parameter Min. Typ. Max. Unit VCC Power Supply Voltage 8 - 26 V ICC Power Supply Current (pin 6), IO1 =IO2 = 2A - - 20 mA VIL VIH Logic Input Voltage (pin 7,10,11) 2 - 0.8 - V VI Logic Input Threshold (pin 5) - 0.8 - V IIH High Level Input Current (pins 7,10,11) VI = + 2V - 20 50 µA IIL Low Level Input Current (pins 7,10,11) V I = + 0.8V –5 0 +5 µA - Off State Output Voltage (pins 8,9) |(8) = |(9) = 2 mA - - 0.4 V Output Saturation Voltage (V(7) high, V(11) High, IO = 2A) - 1.5 1.8 V Low Level Output Current pins 1,3) V(7) Low, V(11) Low, VO = 0V - 400 1000 µA Switch-off Output Voltage (inductive load) Note 1 - - 45 V 10 - - mA VCC – V01 VCC – V02 IOL VCC – V01 VCC – V02 IO1, IO2 Available Ouptut Current (pins 1,3), V(7) high, V(11p) high, VCC – VO = 26V, Tj = 25°C IO Alarme Available ”Alarme” Output Current, V(9) = + 4V 4 8 - mA IO Sense Available ”Sense Ouptut Current, V(8) = + 4V 4 8 - mA IIH Sense Output Sensing high Level Input Current (pins 1,3) VI = +2V - 1 2 mA Note 1 : An external discharge circuit is required for inductive loads 3/9 TDF1779A AVAILABLE OUTPUT CURRENT OUTPUT SATURATION VOLTAGE AVAILABLE ALARM OR SENSE OUTPUT CURRENTS POWER SUPPLY CURRENT 4/9 TDF1779A 5/9 TDF1779A TYPICAL APPLICATION WITH TDF1779A TWO LOADS 12 V - 2 A Load : RC = 6 Ω 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. 6/9 TDF1779A TDF1779A HIGHT CURRENT APPLICATION WITH LOAD 12 V - 4 A Load : RC = 3 Ω 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. 7/9 TDF1779A MULTIWATT11 PACKAGE MECHANICAL DATA DIM. mm MIN. TYP. MAX. MIN. TYP. MAX. A 5 B 2.65 0.104 C 1.6 0.063 D 0.197 1 E 0.49 0.039 0.55 0.019 0.022 F 0.88 0.95 0.035 G 1.45 1.7 1.95 0.057 0.067 0.077 G1 16.75 17 17.25 0.659 0.669 0.679 H1 19.6 0.037 0.772 H2 8/9 inch 20.2 L 21.9 22.2 L1 21.7 22.1 L2 17.4 L3 17.25 L4 10.3 L7 2.65 22.5 0.795 0.862 0.874 0.87 22.5 0.854 18.1 0.685 17.5 17.75 0.679 0.689 10.7 10.9 0.406 0.421 2.9 0.104 0.886 0.886 0.713 0.699 0.429 0.114 M 4.25 4.55 4.85 0.167 0.179 0.191 M1 4.73 5.08 5.43 0.186 0.200 0.214 S 1.9 2.6 0.075 0.102 S1 1.9 2.6 0.075 0.102 Dia1 3.65 3.85 0.144 0.152 TDF1779A 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. 1994 SGS-THOMSON Microelectronics - All Rights Reserved MULTIWATT11 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. 9/9