HV9901 HV9901 Preliminary Demo Kit Available Universal Relay Driver Features General Description ❐ 8V to 450V Input Voltage Range ❐ Energy Saving Hold Current Mode ❐ Adjustable Microcontroller Supply 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. ❐ 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 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. Applications 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 ❏ Industrial Controls ❏ Relay Timers ❏ White Goods 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. ❏ Solenoid Drivers ❐ 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. Home Automation 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. Typical Application Circuit VIN VIN VDD Int Reg HV9901 SYNC VREF GT VREF PWM H/D VCC VCC FB SYNC CS RT Aux Reg POL ENI Enable polarity Enable ENO 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, 1 refer to the most current databook or to the Legal/Disclaimer page on the Supertex website. HV9901 Ordering Information Pin Configuration Package Options 16 Lead Plastic DIP 16 Lead Plastic SO HV9901P HV9901NG VDD VIN VREF HOLD/DELAY GT Absolute Maximum Ratings Input voltage, VIN2 Input voltage to any other pin 2 FB HV9901 CS VCC COM ENI SYNC ENO RT POL -0.5 to +470V -0.3V to VDD+0.3V Continuous total power dissipation for DIP 1000 mW 1 Continuous total power dissipation for SO 750 mW 1 Operating Temperature Range Top View -40 to +85°C Note 1: For operation above 25°C ambient derate linearly at 7.5 mW/°C. Plastic DIP – Plastic SO For SO-16 Pins 2 and 3 are removed Note 2: All voltages are referenced to COM. Electrical Characteristics (TA = 25°C, unless otherwise specified) Symbol Parameters Min Typ Max Unit Conditions 8.0 450 V ICC = 0.25mA load 10 450 V ICC = 1.0mA load 2.0 mA High Voltage Regulator VIN Input Voltage IIN Supply Current VDD Regulator Output Voltage 7.0 7.5 7.8 V VUVLO VDD Under Voltage Lockout 6.4 6.7 7.0 V 2.0 5.5 V 1.0 mA VREF VDD -1.0V V 25 100 nA VFB = VREF 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 Adjustable Regulator VCC Regulator Output Voltage Range ICC Regulator Output Current 0 VFB Feed Back Voltage 0 IFB Input Bias Current 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=25°C unless otherwise noted) VREF Bandgap Reference Voltage 1.22 1.25 1.28 V TA = 25°C VREF Bandgap Reference Voltage 1.20 1.25 1.30 V TA = -40°C to +85°C VREF Load Regulation 7.0 mV 0mA < IREF < 0.3mA VREF Line Regulation 5.0 mV 6V < VDD < 8V IREF(SHORT) Short Circuit Current 1.0 mA IREF(SINK) 20 µA 2.0 Reference Voltage Sink Current 2 HV9901 Electrical Characteristics (TA = 25°C, unless otherwise specified) Symbol Parameters Min Typ Max Unit Conditions 20 25 35 kHz RT = 1.00MΩ 80 100 140 kHz RT = 226KΩ Oscillator fOSC PWM Oscillator Frequency Temperature Coefficient 170 fSYNC Oscillator Sync Frequency SYNC Sync. Input/Output Sourcing Current 20 SYNC Sync. Input/Output Sinking Current 1.0 VSYNC Sync Input Logic Low Voltage ppm/°C 150 kHz 55 µA mA 1.0 V TA= -40°C to +85°C VSYNC = 0.1V PWM DMAX Maximum Duty Cycle 96.5 99.5 % RT = 1.00MΩ DMAX Maximum Duty Cycle 86.5 97.5 % RT = 225KΩ PMIN Minimum Output Pulse Width 100 200 nsec MOSFET Driver Output VGTH Gate Drive Output High VGTL Gate Drive Output Low tR Rise Time tF Fall Time VDD – 0.3 V IOUT = 10 mA 0.3 V IOUT = -10 mA 30 50 nsec CGT = 500pF 30 50 nsec CGT = 500pF 0.833 0.891 V tDELAY(HL) Current limit delay to GT high limit 200 250 ns VCS = 0.88 Volts ICS Input Bias Current 25 1000 nA POL=LOW, ENI=LOW VOS Low limit comparator input offset voltage ±60 mV 250 ns VCS=0.47V, VHOLD=0.417V V IHOLD/DEL (Sourcing)-100µA, Current Sensing VCS(HL) Current Sense Voltage, high limit 0.775 tDELAY(LL) Current limit delay to GT, low limit VHOLD/DEL Hold/Delay output voltage 200 VDD -0.4 POL=LOW, ENI=HIGH IHOLD/DEL Hold Delay Input Bias Current 25 3 500 nA POL=LOW, ENI=LOW HV9901 Electrical Characteristics, continued (TA = 25°C, unless otherwise specified) Symbol Parameters Min Typ Max Unit Conditions 50 100 nsec 2V < VCC < 5.5V Enable Logic tENI Shutdown Delay VENI Enable Input Voltage - High 0.7VCC VCC V 2V < VCC < 5.5V VENI Enable Input Voltage - Low 0 0.3VCC V 2V < VCC < 5.5V IENI Enable Input Current - High 5.0 µA 2V < VCC < 5.5V IENI Enable Input Current - Low µA 2V < VCC < 5.5V VPOL Polarity Voltage - High 0.7VCC VCC V 2V < VCC < 5.5V VPOL Polarity Voltage - Low 0 0.3VCC V 2V < VCC < 5.5V IPOL Polarity Current - High 5.0 µA 2V < VCC < 5.5V IPOL Polarity Current - Low µA 2V < VCC < 5.5V VENO Enable Output Voltage - High 0.9VCC VCC V 2V < VCC < 5.5V VENO Enable Output Voltage - Low 0 0.1VCC V 2V < VCC < 5.5V 1.0 -5.0 -1.0 1.0 -5.0 -1.0 Enable Logic Truth Table POL ENI ENO Gate Drive Output LOW LOW HIGH VGT = Oscillating Output, Duty Cycle depends on Inductive Load LOW HIGH LOW VGT = LOW, SYNC = HIGH, Oscillator shut down. HIGH HIGH LOW VGT = Oscillating Output, Duty Cycle depends on Inductive Load HIGH LOW HIGH VGT = LOW, SYNC = HIGH, Oscillator shut down. 4 HV9901 Applications Information I PULL − IN = VCS( HI ) = 833mV nom RSENSE tPULL-IN VDD = R 1 + HD9 RHD6 I HOLD = IPULL-IN VDD = 7.5V nom VCS( LL ) Current VCS( LL ) VCS( HL ) RSENSE ( t PULL − IN = − RHDa RHDb f PWM ≈ 3.23kHz + IHOLD VCS ( HL ) − VDD CHD ln 1 − VCS ( LL ) − VDD ) 21.8GHz ⋅ Ω ROSC (valid for fpwm > 23kHz) Time R VCC = 1.25V1 + FBa RFBb VIN CIN VIN VDD HV9901 Int Reg SYNC CDD VREF RHDa PWM CREF H/D RHDb 2.0–5.5V @ 1mA GT VREF QSW CS RT CHD RSENSE ROSC VCC Aux Reg RFBa FB POL ENI ENO RFBb 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 VDD VIN 16 4.7µF UVLO 100nF C A Bandgap 1.25 V Reference VREF 15 100nF RHDa R LED RELAY 1N4937 14 2R HOLD/DELAY CHD RHDb 10K VDD GT FB 4 13 S VN2460N8 RFBb VDD Q 100ns Delay RFBa R R 100nF CS 1.25V 5.5kΩ 12 5 VCC C 5V Low Limit µP High Limit RS C VDD COM ENI 6 11 VDD Oscillator shut down 40µA SYNC High Duty Cycle Oscillator 7 Rosc ENO 10 POL RT 8 9 06/26/02rev.4 ©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