UC1707 UC2707 UC3707 Dual Channel Power Driver FEATURES DESCRIPTION • Two independent Drivers The UC1707 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 contain two independent channels, each of which can be activated by either a high or low input logic level signal. Each output can source or sink up to 1.5A as long as power dissipation limits are not exceeded. • 1.5A Totem Pole Outputs • Inverting and Non-Inverting Inputs • 40ns Rise and Fall into 1000pF • High-Speed, Power MOSFET Compatible • Low Cross-Conduction Current Spike • Analog Shutdown with Optional Latch • Low Quiescent Current • 5V to 40V Operation • Thermal Shutdown Protection • 16-Pin Dual-In-Line Package • 20-Pin PLCC and CLCC Package Although each output can be activated independently with its own inputs, it can be forced low in common through the action either of a digital high signal at the Shutdown terminal or a differential low-level analog signal. The Shutdown command from either source can either be latching or not, depending on the status of the Latch Disable pin. Supply voltage for both VIN and VC can independently range from 5V to 40V. These devices are available in two-watt plastic "bat-wing" DIP for operation over a 0°C to 70°C temperature range and, with reduced power, in a hermetically sealed cerdip for –55°C to +125°C operation. Also available in surface mount DW, Q, L packages. TRUTH TABLE (Each Channel) BLOCK DIAGRAM 03/99 Powered by ICminer.com Electronic-Library Service CopyRight 2003 INV. N.I. OUT OUT = INV and N.I. H H L OUT = INV or N.I. L H H H L L L L L UC1707 UC2707 UC3707 CONNECTION DIAGRAMS ABSOLUTE MAXIMUM RATINGS Supply Voltage, VIN, N/J-Pkg . . . . . . . . . . . . . . . . . . . . . . . 40V Collector Supply Voltage, VC, N/J-Pkg . . . . . . . . . . . . . . . 40V Output Current (Each Output, Source or Sink) Steady-State, N/J-Pkg. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±500mA Peak Transient N-Pkg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±1.5A J-Pkg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±1.0A Capacitive Discharge Energy N-Pkg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20mJ J-Pkg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15mJ Digital Inputs (See Note), N/J-Pkg . . . . . . . . . . . . . . . . . . . 5.5V Analog Stop Inputs, N/J-Pkg . . . . . . . . . . . . . . . . . . . . . . . . VIN Power Dissipation at TA = 25°C (See Note) N-Pkg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2W J-Pkg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1W Power Dissipation at T (Leads/Case) = 25°C (See Note) N-Pkg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5W J-Pkg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2W Operating Temperature Range . . . . . . . . . . . . –55°C to +125°C Storage Temperature Range . . . . . . . . . . . . . –65°C to +150°C Lead Temperature (Soldering, 10 Seconds) . . . . . . . . . . 300°C DIL-16, SOIC-16 (TOP VIEW) J or N Package, Note: All four ground pins must be connected to a common ground. Note: All voltages are with respect to the four ground pins which must be connected together. 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. PLCC-20, LCC-20 (TOP VIEW) Q, L Packages N/C INPUT B INV. INPUT B I.N. INPUT A INV. INPUT A NON INV. 3 2 1 20 19 LATCH DISABLE 4 18 VIN GROUND 5 17 GROUND N/C 6 16 N/C GROUND 7 15 GROUND OUTPUT A 8 14 OUTPUT B 9 SHUTDOWN VC 10 11 12 13 ANALOG STOP INV. ANALOG STOP NON INV. N/C Powered by ICminer.com Electronic-Library Service CopyRight 2003 2 UC1707 UC2707 UC3707 ELECTRICAL CHARACTERISTICS: Unless otherwise stated, these specifications apply for TA = –55°C to +125°C for the UC1707, –25°C to +85°C for the UC2707 and 0°C to +70°C for the UC3707; VIN = VC = 20V. TA = TJ. PARAMETERS TEST CONDITIONS MIN TYP MAX UNITS VIN Supply Current VIN = 40V 12 15 mA VC = 40V, Outputs Low 5.2 7.5 mA VC Supply Current VIN =0, VC =30V, No Load .05 0.1 mA VC Leakage Current Digital Input Low Level 0.8 V Digital Input High Level 2.2 V –0.06 –1.0 mA Input Current VI = 0 .05 0.1 mA Input Leakage VI = 5V IO = –50mA 2.0 V Output High Sat., VC-VO 2.5 V IO = –500mA IO = –50mA 0.4 V Output Low Sat., VO 2.5 V IO = –500mA 100 130 160 mV Analog Threshold VCM = 0 to 15V –10 –20 µA Input Bias Current VCM = 0 Thermal Shutdown 155 °C Shutdown Threshold Pin 7 Input 0.4 1.0 2.2 V Latch Disable Threshold Pin 3 Input 0.8 1.2 2.2 V TYPICAL SWITCHING CHARACTERISTICS: VIN = VC = 20V, TA = 25°C. Delays measured to 10% output change. 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 Analog Shutdown Delay Digital Shutdown Delay Powered by ICminer.com Electronic-Library Service CopyRight 2003 TEST CONDITIONS Output Rise Output Fall Stop non-Inv. = 0V Stop Inv. = 0 to 0.5V 2V Input on Pin 7 3 OUTPUT CL = open 1.0 2.2 40 50 60 25 40 50 30 40 50 25 40 50 30 25 45 25 25 0 180 180 50 40 40 55 40 50 50 65 50 UNITS nF ns ns ns ns ns ns ns ns ns ns ns ns ns UC1707 UC2707 UC3707 SIMPLIFIED INTERNAL CIRCUITRY The input common-mode voltage range is from ground to (VIN-3V). When not used both inputs shoul1d be grounded. Activate time is a function of overdrive with a typical value of 180ns. Pin 7 serves both as a comparator output and as a common digital shutdown input. A high signal here will accomplish the fastest turn off of both outputs. Note that "OFF" is defined as the outputs low. Pulling shutdown low defeats the latch operation regardless of its status. Figure 1. Typical digital input gate. The Shutdown latch is disabled when pin 3 is open. An impedance of 4k or less from pin 3 to ground will allow a shutdown signal to set the latch which can then be reset by either recycling the VIN supply or by momentarily (>200ns) raising pin 3 high. The input zener may be used to clamp input signal voltages higher than 5V as long as the zener current is limited to 10mA max. External pull-up resistors are not required. Figure 2. Typical digital input gate. Powered by ICminer.com Electronic-Library Service CopyRight 2003 Figure 3. Latch disable. 4 UC1707 UC2707 UC3707 SIMPLIFIED INTERNAL CIRCUITRY (cont.) Figure 4. Transformer coupled push-pull MOSFET drive circuit. The Analog shutdown can give pulse-by-pulse current limiting with a reset pulse from the clock output of the UC1524. R1C1 is used to filter leading edge spikes. Figure 5. Current limiting. Powered by ICminer.com Electronic-Library Service CopyRight 2003 5 UC1707 UC2707 UC3707 APPLICATIONS With an external reference, the shutdown comparator can be used for over-voltage protection. R1 and R2 set the shutdown level while R3 adds positive feedback for hysteresis. Figure 6. Over-voltage protection. When driven with a TTL square wave drive, the low output impedance of the UC1707 allows ready implementation of charge pump voltage converters. Figure 8. Charge pump circuits. D1, D2: UC3611 Schottky Diodes Figure 7. Power MOSFET drive circuit. D1, D2: UC3611 Schottky Diodes Figure 9. Power bipolar drive circuit. Powered by ICminer.com Electronic-Library Service CopyRight 2003 6 UC1707 UC2707 UC3707 TRANSFORMER COUPLING D1, D2: UC3611 Schottky Diode Figure 10. Transformer coupled MOSFET drive circuit. D1, D2: UC3611 Schottky Diode Figure 11. Power MOSFET drive circuit using negative bias voltage and level shifting to ground reference PWM. 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 7 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 acknowledgement, 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. 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