TDF1779A

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 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 1/9 TDF1779A 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 Lim...