Supertex inc. HV809DB2 EL Driver Demoboard General Description Specifications The HV809DB2 EL Driver demoboard contains all the circuitry necessary to drive an EL (Electroluminescent) lamp. Simply connect it to a 4.5 to 6.0V DC supply and an EL lamp as shown below. For additional assistance in designing EL driver circuits, please refer to application note AN-H36 (EL Lamp Driver Circuits). Supply voltage 6.0VDC Supply current ~170mA Lamp size range Up to 12.5in2 Lamp frequency ~200Hz Board Layout and Connections Supertex inc. V+ V+ DC Input Voltage CIN 555 1 LX - CHV + V- Connections: V+ and VDC input supply voltage. V+ is the positive side of the supply and V- is the return side. It supplies the boost converter circuit to generate the high DC voltage to the HV809. The supplied circuit is optimized for an operating range of 4.5 to 6.0 volts. VA and VB VA and VB are the EL lamp connections. Polarity is irrelevant. Maximum lamp size should be limited to 12.5in2. Switch An On/Off slide switch is provided. When in the off position, it disconnects the input voltage to the circuit. Doc.# DSDB-HV809DB2 B032014 CDD ZFB 1 HV809LG D RDELAY V- CT RFB QSW DSW RP VA VA RD OFF ON RC HV809DB2 C Connect to EL Lamp REL VB VB Typical Performance Lamp Size VIN IIN fEL Brightness (in2) (V) (mA) (Hz) (ft-lm) 3.0 4.5 48.4 208 13.5 3.0 6.0 40.5 208 14.1 6.0 4.5 81.5 208 13.0 6.0 6.0 66.9 208 13.6 12.5 4.5 164.4 208 14.9 12.5 6.0 130.2 208 15.5 Note: The differences in brightness in the above measurements are due to the differences between lamps used (it is within the tolerance of the lamp for most manufacturers). Supertex inc. www.supertex.com HV809DB2 HV809DB2 Circuit Schematic VIN U1 555 + 4-AA Cells CIN 4.7µF SW 1 GND VCC 8 2 TRIG DISCHG 7 3 OUT THRSH 6 4 RESET CNTRL 5 RC 51kΩ RD 20kΩ D BAS21 QSW VN2224N3 U2 HV809LG LX 330µH ZFB 150V RFB 120kΩ CDD 0.1µF CHV 2.2µF 1 HVIN VA 8 VDD VB 7 3 Osc2 GND 6 4 Osc1 REL-Osc 5 2 CT 1.0nF REL 2.0MΩ Bill of Materials Item Description Value Package Manufacturer Part Number RC Thick film chip resistor 51kΩ ±5% 0805 Any - RD Thick film chip resistor 20kΩ ±5% 0805 Any - RFB Thick film chip resistor 120kΩ ±5% 0805 Any - REL Thick film chip resistor 2.0MΩ ±5% 0805 Any - CIN Tantalum capacitor 4.7µF, 16V 1206 Any - CT X7R ceramic chip capacitor 1.0nF, 50V 0805 Any - CHV Radial electrolytic capacitor 2.2µF, 250V 6.3mm Any - CDD X7R ceramic chip capacitor 0.1µF, 16V 0805 Any - D 250V diode 250V SOT-23 Motorola BAS21 ZFB Zener diode 150V, 5% DO-35 Microsemi 1N5276B QSW N-channel MOSFET 250V, 1.25Ω TO-92 Supertex VN2224N3 Inductor 330µH Surface Mount J.W. Miller PM105-331K SW Slide switch SPDT PC Mount E-Switch EG1271A U1 Timer IC - SO-8 National LM555CM U2 EL lamp driver IC 200V SO-8 Supertex HV809LG LX Supertex inc. does not recommend the use of its products in life support applications, and will not knowingly sell them for use in such applications unless it receives an adequate “product liability indemnification insurance agreement.” Supertex inc. does not assume responsibility for use of devices described, and limits its liability to the replacement of the devices determined defective due to workmanship. No responsibility is assumed for possible omissions and inaccuracies. Circuitry and specifications are subject to change without notice. For the latest product specifications refer to the Supertex inc. (website: http//www.supertex.com) Supertex inc. ©2014 Supertex inc. All rights reserved. Unauthorized use or reproduction is prohibited. Doc.# DSDB-HV809DB2 B032014 2 1235 Bordeaux Drive, Sunnyvale, CA 94089 Tel: 408-222-8888 www.supertex.com