UC1708 UC2708 UC3708 Dual Non-Inverting Power Driver FEATURES DESCRIPTION • 3.0A Peak Current Totem Pole Output • 5 to 35V Operation • 25ns Rise and Fall Times • 25ns Propagation Delays The UC1708 family of power drivers is made with a high-speed, highvoltage, Schottky process to interface control functions and high-power switching devices – particularly power MOSFETs. Operating over a 5 to 35 volt supply range, these devices contain two independent channels. The A and B inputs are compatible with TTL and CMOS logic families, but can withstand input voltages as high as VIN. Each output can source or sink up to 3A as long as power dissipation limits are not exceeded. • Thermal Shutdown and UnderVoltage Protection • High-Speed, Power MOSFET Compatible • Efficient High Frequency Operation • Low Cross-Conduction Current Spike • Enable and Shutdown Functions • Wide Input Voltage Range • ESD Protection to 2kV Although each output can be activated independently with its own inputs, they can be forced low in common through the action of either a digital high signal at the Shutdown terminal or by forcing the Enable terminal low. The Shutdown terminal will only force the outputs low, it will not effect the behavior of the rest of the device. The Enable terminal effectively places the device in under-voltage lockout, reducing power consumption by as much as 90%. During under-voltage and disable (Enable terminal forced low) conditions, the outputs are held in a self-biasing, low-voltage, state. The UC3708 and UC2708 are available in plastic 8-pin MINIDIP and 16pin "bat-wing" DIP packages for commercial operation over a 0oC to +70oC temperature range and industrial temperature range of -25oC to +85oC respectively. For operation over a -55oC to +125oC temperature range, the UC1708 is available in hermetically sealed 8-pin MINIDIP and 16 pin DIP packages. Surface mount devices are also available. BLOCK DIAGRAM UDG-92024-1 Note: Shutdown feature available only in JE , NE or DW packages. 3/97 Powered by ICminer.com Electronic-Library Service CopyRight 2003 1 UC1708 UC2708 UC3708 ABSOLUTE MAXIMUM RATINGS (Note 1) CONNECTION DIAGRAMS Supply Voltage VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35V Output Current (Each Output, Source or Sink) Steady-State. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5A Peak Transient . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3A Ouput Voltage . . . . . . . . . . . . . . . . . . . . . . . -0.3 to (VIN + 0.3)V Enable and Shutdown Inputs . . . . . . . . . . . . . . . . . -0.3 to 6.2V A and B Inputs . . . . . . . . . . . . . . . . . . . . . . . -0.3 to (VIN + 0.3)V Operating Junction Temperature (Note 2) . . . . . . . . . . . . 150°C Storage Temperature Range . . . . . . . . . . . . . . . . -65° to 150°C Lead Temperature (Soldering, 10 Seconds) . . . . . . . . . . 300°C DIL-8 (Top View) J Or N Package NOTE 1: All voltages are with respect to Logic Gnd pin. All currents are positive into, negative out of, device terminals. NOTE 2: Consult Unitrode Integrated Circuits databook for information regarding thermal specifications and limitations of packages. SOIC-16 (Top View) DW Package DIL-16 (Top View) JE or NE Package Note: In JE package Pin 4 is logic ground. Pins 5, 12, and 13 are N/C. ELECTRICAL CHARACTERISTICS: Unless otherwise stated, VIN=10V to 35V, and these specifications apply for: –55oC<TA<125oC for the UC1708, –25oC<TA<+85oC for the UC2708, and 0oC<TA<70oC for the UC3708. TA = TJ. PARAMETER VIN Supply Current TEST CONDITIONS MIN TYP MAX UNITS OutputsLow 18 26 mA Outputs High 14 18 mA Enable = 0V 1 4 mA 0.8 V A, B and Shutdown Inputs Low Level A, B and Shutdown Inputs High Level 2.0 V A, B Input Current Low VA,B = 0.4V -1 A, B Input Current High VA,B = 2.4V -200 A, B Input Leakage Current High VA,B = 35.3V 200 µA Shutdown Input Current Low VSHUTDOWN = 0.4V 20 100 µA Shutdown Input Current High VSHUTDOWN = 2.4V 170 500 µA VSHUTDOWN = 6.2V 0.6 1.5 mA Powered by ICminer.com Electronic-Library Service CopyRight 2003 2 -0.6 mA 50 µA UC1708 UC2708 UC3708 ELECTRICAL CHARACTERISTICS (cont.): Unless otherwise stated, VIN = 10V to 35V, and these specifications apply for: –55oC<TA<125oC for the UC1708, –25oC<TA<+85oC for the UC2708, and 0oC<TA<70oC for the UC3708. TA = TJ. PARAMETER TEST CONDITIONS Enable Input Current Low VENABLE = 0V Enable Input Current High VENABLE = 6.2V MIN TYP MAX UNITS -600 -460 200 µA Enable Threshold Rising Enable Threshold Falling Output High Sat., VIN - VOUT Output Low Sat., VOUT 1.0 200 µA 2.8 3.6 V 2.4 3.4 V IOUT = -50mA 2.0 V IOUT = -500mA 2.5 V IOUT = 50mA 0.5 V IOUT = 500mA 2.5 V Thermal Shutdown °C 155 SWITCHING CHARACTERISTICS (Figure 1) PARAMETER (VIN = 20V, delays measured to 10% output change.) TEST CONDITIONS MIN TYP MAX UNITS CL = 0pF 25 40 ns CL = 1000pF (Note 3) 25 40 ns From A,B Input to Output: Rise Time Delay (TPLH) 10% to 90% Rise (TTLH) Fall Time Delay (TPHL) 90% to 10% Fall (TTHL) CL = 2200pF 30 45 ns CL = 0pF 55 75 ns CL = 1000pF (Note 3) 25 50 ns CL = 2200pF 40 55 ns CL = 0pF 25 40 ns CL = 1000pF (Note 3) 25 45 ns CL = 2200pF 35 50 ns CL = 0pF 15 20 ns CL = 1000pF (Note 3) 25 45 ns CL = 2200pF 40 55 ns CL = 0pF 25 75 ns CL = 1000pF (Note 3) 30 75 ns From Shutdown Input to Output Rise Time Delay (TPLH) 10% to 90% Rise (TTLH) Fall Time Delay (TPHL) 90% to 10% Fall (TTHL) Total Supply Current CL = 2200pF 35 75 ns CL = 0pf 50 75 ns CL = 1000pF (Note 3) 25 50 ns CL = 2200pF 40 55 ns CL = 0pF 25 45 ns CL = 1000pF (Note 3) 30 50 ns CL = 2200pF 35 55 ns CL = 0pF 25 20 ns CL = 1000pF (Note 3) 25 45 ns CL = 2200pF 40 55 ns F = 200kHz, 50% duty cycle, both channels; CL = 0pF 23 25 mA F = 200kHz, 50% duty cycle, both channels; CL = 2200pF 38 45 mA NOTE 3: These parameters, specified at 1000pF, although guaranteed over recommended operating conditions, are not tested in production. Powered by ICminer.com Electronic-Library Service CopyRight 2003 3 UC1708 UC2708 UC3708 Figure 1: AC Test Circuit and Switching Time Waveforms 4.3V INPUT 0V 50% 50% 20V 90% 90% OUTPUT 0V 10% 10% TPHL TPLH TT LH TTHL UDG-92026 Figure 2: Equivalent Input Circuits UDG-92025 Note: Shutdown feature available only in JE, NE or DW Packages. UNITRODE CORPORATION 7 CONTINENTAL BLVD. • MERRIMACK, NH 03054 TEL. (603) 424-2410 • FAX (603) 424-3460 Powered by ICminer.com Electronic-Library Service CopyRight 2003 4 IMPORTANT NOTICE Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. 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