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UC1705 UC2705 UC3705
High Speed Power Driver
FEATURES
* * * * * * * * * 1.5A Source/Sink Drive 100 nsec Delay 40 nsec Rise and Fall into 1000pF Inverting and Non-Inverting Inputs Low Cross-Conduction Current Spike Low Quiescent Current 5V to 40V Operation Thermal Shutdown Protection MINIDIP and Power Packages
DESCRIPTION
The UC1705 family of power drivers is made with a high speed Schottky process to interface between low-level control functions and high-power switching devices - particularly power MOSFETs. These devices are also an optimum choice for capacitive line drivers where up to 1.5 amps may be switched in either direction. With both Inverting and Non-Inverting inputs available, logic signals of either polarity may be accepted, or one input can be used to gate or strobe the other. Supply voltages for both VS and VC can independently range from 5V to 40V. For additional application details, see the UC1707/3707 data sheet. The UC1705 is packaged in an 8-pin hermetically sealed CERDIP for -55C to +125C operation. The UC3705 is specified for a temperature range of 0C to +70C and is available in either a plastic minidip or a 5-pin, power TO-220 package.
TRUTH TABLE
INV H L H L N.I H H L L OUT L H L L
CONNECTION DIAGRAMS
DIL-8 MINIDIP, SOIC-8 (TOP VIEW) N or J Package, D Package 5-PIN TO-220 (TOP VIEW) T Package
OUT = INV and N.I. OUT = INV or N.I.
BLOCK DIAGRAM
JANUARY 1994 - REVISED AUGUST 2000 - SLUS370A
UC1705 UC2705 UC3705 ABSOLUTE MAXIMUM RATINGS
N-Pkg J-Pkg T-Pkg Supply Voltage, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40V . . . . . . . . . . . . . . . . . . . 40V . . . . . . . . . . . . . . . . . . . 40V Collector Supply Voltage, VC . . . . . . . . . . . . . . . . . . . . . . . . . 40V . . . . . . . . . . . . . . . . . . . 40V . . . . . . . . . . . . . . . . . . . 40V Output Current (Source or Sink) Steady-State. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500mA. . . . . . . . . . . . . . . . 500mA. . . . . . . . . . . . . . . . . 1.0A Peak Transient . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5A. . . . . . . . . . . . . . . . . . 1.0A. . . . . . . . . . . . . . . . . . 2.0A Capacitive Discharge Energy . . . . . . . . . . . . . . . . . . . . . . 20J. . . . . . . . . . . . . . . . . . . 15J. . . . . . . . . . . . . . . . . . . 50J . . Digital Inputs (See Note) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5V. . . . . . . . . . . . . . . . . . . 5.5V. . . . . . . . . . . . . . . . . . . 5.5V Power Dissipation at TA = 25C (See Note) . . . . . . . . . . . . . . 1W. . . . . . . . . . . . . . . . . . . . 1W. . . . . . . . . . . . . . . . . . . . 3W Power Dissipation at TA (Leads/Case) = 25C (See Note) . . . 3W. . . . . . . . . . . . . . . . . . . . 2W . . . . . . . . . . . . . . . . . . . 25W Operating Temperature Range . . . . . . . . . . . . . . . . . . . . 0C to +70C . . . . . . . . . . -55C to +125C . . . . . . . . . . 0C to +70C Storage Temperature Range . . . . . . . . . . . . . . . . . . . . -65C to +150C . . . . . . . . . -65C to +150C . . . . . . . . . -65C to +150C Lead Temperature (Soldering, 10 seconds) . . . . . . . . . . . . . 300C . . . . . . . . . . . . . . . . . 300C . . . . . . . . . . . . . . . . . 300C Note: All currents are positive into, negative out of the specified terminal. Digital Drive can exceed 5.5V if input current is limited to 10mA Consult Packaging Section of Databook for thermal limitations and considerations of package.
ELECTRICAL CHARACTERISTICS: Unless otherwise stated, these specifications apply for TA = -55C to +125C for
the UC1705, -25C to +85C for the UC2705, and 0C to +70C for the UC3705; VS = VC = 20V, TA = TJ. PARAMETERS VS Supply Current VC Supply Current (N, J Only) VC Leakage Current (N, J Only) Digital Input Low Level Digital Input High Level Input Current Input Leakage Output High Sat., VC-VO Output Low Sat., VO Thermal Shutdown TEST CONDITIONS VS = 40V, (Outputs High, T Pkg) VS = 40V, (Outputs Low, T Pkg) VC = 40V, Outputs Low VS = 0, VC = 30V MIN TYP 6 8 2 0.05 MAX UNITS 8 mA 12 mA 4 mA 0.1 mA 0.8 V V -1.0 mA 0.1 mA 2.0 V 2.5 V 0.4 V 2.5 V C
2.2 VI = 0 VI = 5V IO = -50mA IO = -500mA IO = 50mA IO = 500mA -0.6 0.05
155
TYPICAL SWITCHING CHARACTERISTICS:
PARAMETERS From Inv. Input to Output: Rise Time Delay 10% to 90% Rise Fall Time Delay 90% to 10% Fall From N. I. Input to Output: Rise Time Delay 10% to 90% Rise Fall Time Delay 90% to 10% Fall VC Cross-Conduction Current Spike Duration
VS = VC = 20V, TA = 25C. Delays measured to 10% output change. TEST CONDITIONS OUTPUT CL = open 1.0 2.2 60 60 60 20 40 60 60 60 60 25 40 50 90 20 60 25 25 0 90 40 60 40 90 60 60 50 UNIT nF ns ns ns ns ns ns ns ns ns ns
Ouput Rise Output Fall
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UC1705 UC2705 UC3705 APPLICATIONS
Power MOSFET Drive Circuit Power MOSFET Drive Circuit using Negative Bias Voltage and Level Shifting to Ground Referenced PWMs.
D1, D2: UC3611 Schottky Diodes
D1, D2: UC3611 Schottky Diodes
Transformer Coupled MOSFET Drive Circuit
Charge Pump Circuits
D1, D2: UC3611 Schottky Diodes
UNITRODE CORPORATION 7 CONTINENTAL BLVD. * MERRIMACK, NH 03054 TEL. 603-424-2410 * FAX 603-424-3460
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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. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgment, including those pertaining to warranty, patent infringement, and limitation of liability. TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with TI's standard warranty. Testing and other quality control techniques are utilized to the extent TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed, except those mandated by government requirements. Customers are responsible for their applications using TI components. In order to minimize risks associated with the customer's applications, adequate design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards. TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other intellectual property right of TI covering or relating to any combination, machine, or process in which such semiconductor products or services might be or are used. TI's publication of information regarding any third party's products or services does not constitute TI's approval, warranty or endorsement thereof.
Copyright (c) 2000, Texas Instruments Incorporated

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