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| HV9901 HV9901 Demo Kit Available Preliminary Universal Relay Driver General Description The Supertex HV9901 is a BiCMOS/DMOS universal relay driver that employs PWM switching techniques. It is designed for efficient and energy-saving operation of a low voltage relay with supply voltages ranging from 8 to 450V DC through utilization of the relay coils' inductance. The circuit is capable of operating over a wide input voltage range without requiring a change of any external components. For example, this will enable users to use 5V coil relays for DC voltages 8 - 450V or AC voltages up to 240V. The HV9901 has an internal high-voltage regulator to power internal PWM circuitry. Additionally it includes an adjustable auxiliary regulator with a 1mA capability that can be used to supply low power microcontrollers. The pull-in current, pull-in time and hold current are all programmable using only two resistors and a capacitor. The PWM switching frequency can be either - Synchronized to an external clock, or - Synchronized to other HV9901s, where the synchronized frequency is the highest free-running frequency The enable (ENI) logic input is used to turn the relay on/off. Enable polarity may be selected via the POL input. Audible noise is prevented using fixed switching frequencies above 20kHz. WARNING!!! Galvanic isolation is not provided. Dangerous voltages are present when connected to the AC line. It is the responsibility of the designer to ensure adequate safeguards are in place to protect the end user from electrical shock. Features 8V to 450V Input Voltage Range Energy Saving Hold Current Mode Adjustable Microcontroller Supply Low Supply Current <1mA Constant Current Coil Drive Programmable Pull-in Current, Pull-in Time, and Hold Current Efficient PWM Operation Using the Relay Coils' Inductance Applications Industrial Controls Relay Timers White Goods Solenoid Drivers Home Automation Typical Application Circuit VIN VIN VDD Int Reg HV9901 SYNC SYNC VREF VREF PWM GT CS RT H/D VCC VCC Aux Reg POL ENI ENO Enable Enable polarity FB 06/25/02 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 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. 1 HV9901 Ordering Information Package Options 16 Lead Plastic DIP HV9901P 16 Lead Plastic SO HV9901NG Pin Configuration VIN VDD VREF HOLD/DELAY Absolute Maximum Ratings Input voltage, VIN2 Input voltage to any other pin 2 Continuous total power dissipation for DIP Continuous total power dissipation for SO Operating Temperature Range Note 2: All voltages are referenced to COM. GT FB HV9901 CS COM SYNC RT VCC ENI ENO POL -0.5 to +470V -0.3V to VDD+0.3V 1000 mW 1 750 mW 1 -40 to +85C Top View Plastic DIP - Plastic SO For SO-16 Pins 2 and 3 are removed Note 1: For operation above 25C ambient derate linearly at 7.5 mW/C. Electrical Characteristics (TA = 25C, unless otherwise specified) Symbol Parameters Min Typ Max Unit Conditions High Voltage Regulator VIN IIN Input Voltage Supply Current 8.0 10 450 450 2.0 V V mA ICC = 0.25mA load ICC = 1.0mA load no load at VDD, load at ICC =1mA, CGT = 500pF, fOSC = 25 KHz no load at VDD, load at ICC =1mA, CGT = 500pF, fOSC = 25 KHz VDD Regulator Output Voltage 7.0 7.5 7.8 V VUVLO VDD Under Voltage Lockout 6.4 6.7 7.0 V Adjustable Regulator VCC ICC VFB IFB Regulator Output Voltage Range Regulator Output Current Feed Back Voltage Input Bias Current 2.0 0 0 VREF 25 5.5 1.0 VDD -1.0V 100 V mA V nA VFB = VREF ICC =1.0mA load no load at VDD , See Note Note: Maximum allowable load current limited by power dissipation and operating ambient temperature. Reference (TA=25C unless otherwise noted) VREF VREF VREF VREF Bandgap Reference Voltage Bandgap Reference Voltage Load Regulation Line Regulation 2.0 1.22 1.20 1.25 1.25 1.28 1.30 7.0 5.0 1.0 20 2 V V mV mV mA A TA = 25C TA = -40C to +85C 0mA < IREF < 0.3mA 6V < VDD < 8V IREF(SHORT) Short Circuit Current IREF(SINK) Reference Voltage Sink Current HV9901 Electrical Characteristics (TA = 25C, unless otherwise specified) Symbol Parameters Min Typ Max Unit Conditions Oscillator fOSC PWM Oscillator Frequency Temperature Coefficient fSYNC SYNC SYNC VSYNC Oscillator Sync Frequency Sync. Input/Output Sourcing Current Sync. Input/Output Sinking Current Sync Input Logic Low Voltage 20 1.0 1.0 20 80 25 100 170 150 55 35 140 kHz kHz ppm/C kHz A mA V VSYNC = 0.1V RT = 1.00M RT = 226K TA= -40C to +85C PWM DMAX DMAX PMIN Maximum Duty Cycle Maximum Duty Cycle Minimum Output Pulse Width 96.5 86.5 100 99.5 97.5 200 % % nsec RT = 1.00M RT = 225K MOSFET Driver Output VGTH VGTL tR tF Gate Drive Output High Gate Drive Output Low Rise Time Fall Time 30 30 VDD - 0.3 0.3 50 50 V V nsec nsec IOUT = 10 mA IOUT = -10 mA CGT = 500pF CGT = 500pF Current Sensing VCS(HL) Current Sense Voltage, high limit 0.775 0.833 200 25 0.891 250 1000 60 200 VDD -0.4 25 500 250 V ns nA mV ns V nA VCS=0.47V, VHOLD=0.417V IHOLD/DEL (Sourcing)-100A, POL=LOW, ENI=HIGH IHOLD/DEL Hold Delay Input Bias Current POL=LOW, ENI=LOW VCS = 0.88 Volts POL=LOW, ENI=LOW tDELAY(HL) Current limit delay to GT high limit ICS VOS Input Bias Current Low limit comparator input offset voltage tDELAY(LL) Current limit delay to GT, low limit VHOLD/DEL Hold/Delay output voltage 3 HV9901 Electrical Characteristics, continued (TA = 25C, unless otherwise specified) Symbol Parameters Min Typ Max Unit Conditions Enable Logic tENI VENI VENI IENI IENI VPOL VPOL IPOL IPOL VENO VENO Shutdown Delay Enable Input Voltage - High Enable Input Voltage - Low Enable Input Current - High Enable Input Current - Low Polarity Voltage - High Polarity Voltage - Low Polarity Current - High Polarity Current - Low Enable Output Voltage - High Enable Output Voltage - Low -5.0 0.9VCC 0 -5.0 0.7VCC 0 1.0 -1.0 VCC 0.1VCC 0.7VCC 0 1.0 -1.0 VCC 0.3VCC 5.0 50 100 VCC 0.3VCC 5.0 nsec V V A A V V A A V V 2V < VCC < 5.5V 2V < VCC < 5.5V 2V < VCC < 5.5V 2V < VCC < 5.5V 2V < VCC < 5.5V 2V < VCC < 5.5V 2V < VCC < 5.5V 2V < VCC < 5.5V 2V < VCC < 5.5V 2V < VCC < 5.5V 2V < VCC < 5.5V Enable Logic Truth Table POL LOW LOW HIGH HIGH ENI LOW HIGH HIGH LOW ENO HIGH LOW LOW HIGH Gate Drive Output VGT = Oscillating Output, Duty Cycle depends on Inductive Load VGT = LOW, SYNC = HIGH, Oscillator shut down. VGT = Oscillating Output, Duty Cycle depends on Inductive Load VGT = LOW, SYNC = HIGH, Oscillator shut down. 4 HV9901 Applications Information I PULL - IN = VCS( HL ) RSENSE VCS( HI ) = 833mV nom tPULL-IN VDD = 7.5V nom IPULL-IN VCS( LL ) VDD = R 1 + HD9 RHD6 VCS( LL ) RSENSE I HOLD = Current IHOLD t PULL - IN = - RHDa RHDb ( ) VCS ( HL ) - VDD CHD ln 1 - VCS ( LL ) - VDD (valid for fpwm > 23kHz) Time f PWM 3.23kHz + 21.8GHz ROSC R VCC = 1.25V1 + FBa RFBb VIN CIN VIN VDD CDD VREF RHDa CREF H/D RHDb CHD Int Reg HV9901 SYNC GT VREF PWM QSW CS RT ROSC RSENSE 2.0-5.5V @ 1mA VCC RFBa FB RFBb Aux Reg POL ENI ENO 5 HV9901 Functional Block Diagram and Typical Application Notes: 1. This diode and bridge rectifier required only for AC operation. 2. For non-isolated AC operation the entire circuit must be floating. 3. All comparators have open drain outputs. 1N4148 See Note 1. 1 VIN VDD 16 4.7F UVLO 100nF C A Bandgap 1.25 V Reference VREF 15 100nF RHDa R LED 14 1N4937 RELAY 2R HOLD/DELAY CHD RHDb 10K VDD GT FB S 4 VN2460N8 13 VDD RFBb 100ns Delay Q R R RFBa CS 5.5k 100nF 1.25V 5 C Low Limit RS High Limit C VDD 12 VCC 5V P COM ENI 6 11 VDD Oscillator shut down 40A SYNC 7 High Duty Cycle Oscillator ENO 10 Rosc RT POL 8 9 06/26/02rev.4 (c)2002 Supertex Inc. All rights reserved. Unauthorized use or reproduction prohibited. 6 1235 Bordeaux Drive, Sunnyvale, CA 94089 TEL: (408) 744-0100 * FAX: (408) 222-4895 www.supertex.com |
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