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| HT0440 Dual High Voltage Isolated MOSFET Driver Ordering Information Input to Output Isolation Voltage 400V Package Option 8-Pin Narrow Body SOIC HT0440LG Features 400V input to output isolation 700V isolation between outputs No external voltage supply required Dual isolated output drivers Option of internal or external clock General Description The Supertex HT0440 is a dual high voltage isolated driver utilizing Supertex's proprietary HVCMOS(R) technology. It is designed to drive discrete MOSFETs configured as bi-directional or unidirectional switches. It can drive N-channel MOSFETs as high side switches up to 400V. The HT0440 generates two independent DC isolated voltages to the outputs, VOUTA and VOUTB when logic inputs A and B are at logic high. The internal clock of the HT0440 can be disabled by applying an external clock signal to the CLK pin. This allows the power dissipation and AC characteristics to be tailored to meet specific needs. The CLK pin should be connected to ground when not in use. The HT0440 does not require any external power supplies. The internal supply voltage is supplied by either of the two logic inputs A or B when they are at logic high. Applications Telecommunications Modems Solid state relays High side switches High end audio switches Avionics ATE Pin Configuration 400V -0.5 to +7.0V -40C to +85C -55C to +150C 300C A CLK -VOUTA +VOUTA 1 2 3 4 8 7 6 5 Absolute Maximum Ratings1 Input to Output Isolation Voltage, VISO Logic Input Voltage, VA, VB Operating Temperature Storage Temperature Soldering Temperature2 Note: 1. All voltages are referenced to ground. 2. Distance of 1.6mm from case for 10 seconds. B GND -VOUTB +VOUTB top view SO-8 For detailed circuit and application information, please refer to application note #AN-D26. Note: See Package Outline section for dimensions. 12/13/01 Supertex Inc. does not recommend the use of its products in life support applications and will not knowingly sell its products for use in such applications unless it receives an adequate "products liability indemnification insurance agreement." Supertex does not assume responsibility for use of devices described and limits its liability to the replacement of devices determined to be defective due to workmanship. No responsibility is assumed for possible omissions or inaccuracies. Circuitry and specifications are subject to change without notice. For the latest product specifications, refer to the 1 Supertex website: http://www.supertex.com. For complete liability information on all Supertex products, refer to the most current databook or to the Legal/Disclaimer page on the Supertex website. HT0440 Electrical Characteristics (Over recommended operating conditions, TA = 25C unless otherwise specified) DC Characteristics Symbol IIHA + IIHB Parameter Total logic high input current Min Typ Max 300 500 2.0 1.0 2.0 VOUTA, VOUTB Output Voltage 6.0 5.0 6.0 10.0 8.0 IILA IILB IILQ VISO VCISO Logic low input A current Logic low input B current Quiescent current Input to output isolation voltage Output to output isolation voltage 400 700 10 10 10 Unit A A mA mA mA V V V V V A A A V V Conditions VA = 3.5V, VB = 3.5V, CLK = 0V VA = 3.5V, VB = 3.5V, CLK = 500KHz VA = 3.5V, VB = 3.5V, CLK = 2.0MHz VA = 5.5V, VB = 5.5V, CLK = 0V VA = 5.5V, VB = 5.5V, CLK = 500KHz VA = 3.15V, VB = 3.15V, CLK = 0V, no load VA = 3.15V, VB = 3.15V, CLK = 500KHz, no load VA = 3.15V, VB = 3.15V, CLK = 2.0MHz, no load VA = 4.5V, VB = 4.5V, CLK = 0V, no load VA = 4.5V, VB = 4.5V, CLK = 500KHz, no load VA = 0.5V, VB = high VA = high, VB = 0.5V VA = 0.5V, VB = 0.5V AC Characteristics Symbol td(ON) tr td(OFF) tf Parameter Turn on delay time Rise time Turn off delay time Fall time Min Typ Max 50 650 150 3.0 Unit s s s ms Conditions See timing diagram and test circuit CLK = 0V, CL = 600pF Recommended Conditions Symbol CLK VIHCLK VILCLK VIH VIL TA Parameter External clock frequency Clock input high voltage Clock input low voltage Logic input high voltage Logic input low voltage Operating temperature Min 0.5 3.15 0 3.15 0 -40 Typ Max 2.0 5.5 0.5 5.5 0.5 +85 Unit MHz V V V V C Conditions 2 HT0440 Truth Table A 0 0 0 1 0 0 0 1 1 1 0 B 0 CLK 0 0 0 0 Clk Clk Clk Clk VOUTA Off Off On On Off Off On On VOUTB Off On Off On Off On Off On Internal Clock Off On On On Off Off Off Off Block Diagram Isolation Barrier 2 R A 1 Logic & Internal Clock Driver A 10R R R Driver B 10R R 4 3 5 6 + VOUTA - + VOUTB - CLK B GND 8 7 R=158K 47% Timing Diagram 4.5V VA, VB 0V 50% 50% 90% VOUTA, VOUTB 90% 10% 10% td(ON) tr td(OFF) tf 3 HT0440 Test Circuit 4.5V 0V 8 B 1 A VOUTA + - 4 VOUTA 3 CL = 600pF HT0440 2 5 CLK GND VOUTB + - VOUTB 7 6 CL = 600pF 12/13/010 (c)2001 Supertex Inc. All rights reserved. Unauthorized use or reproduction prohibited. 4 1235 Bordeaux Drive, Sunnyvale, CA 94089 TEL: (408) 744-0100 * FAX: (408) 222-4895 www.supertex.com |
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