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USER MANUAL HV860 Microchip
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The Microchip name and logo, the Microchip logo, Adaptec, AVR, AVR logo, AVR Freaks, BesTime, BitCloud, CryptoMemory, CryptoRF, dsPIC, flexPWR, HELDO, IGLOO, JukeBlox, KeeLoq, Kleer, LANCheck, LinkMD, maXStylus, maXTouch, MediaLB, megaAVR, Microsemi, Microsemi logo, MOST, MOST logo, MPLAB, OptoLyzer, PIC, picoPower, PICSTART, PIC32 logo, PolarFire, Prochip Designer, QTouch, SAM-BA, SenGenuity, SpyNIC, SST, SST Logo, SuperFlash, Symmetricom, SyncServer, Tachyon, TimeSource, tinyAVR, UNI/O, Vectron, and XMEGA are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries.
AgileSwitch, APT, ClockWorks, The Embedded Control Solutions Company, EtherSynch, Flashtec, Hyper Speed Control, HyperLight Load, Libero, motorBench, mTouch, Powermite 3, Precision Edge, ProASIC, ProASIC Plus, ProASIC Plus logo, Quiet-Wire, SmartFusion, SyncWorld, Temux, TimeCesium, TimeHub, TimePictra, TimeProvider, TrueTime, and ZL are registered trademarks of Microchip Technology Incorporated in the U.S.A.
Adjacent Key Suppression, AKS, Analog-for-the-Digital Age, Any Capacitor, AnyIn, AnyOut, Augmented Switching, BlueSky, BodyCom, Clockstudio, CodeGuard, CryptoAuthentication, CryptoAutomotive, CryptoCompanion, CryptoController, dsPICDEM, dsPICDEM.net, Dynamic Average Matching, DAM, ECAN, Espresso T1S, EtherGREEN, GridTime, IdealBridge, In-Circuit Serial Programming, ICSP, INICnet, Intelligent Paralleling, IntelliMOS, Inter-Chip Connectivity, JitterBlocker, Knob-on-Display, KoD, maxCrypto, maxView, memBrain, Mindi, MiWi, MPASM, MPF, MPLAB Certified logo, MPLIB, MPLINK, MultiTRAK, NetDetach, Omniscient Code Generation, PICDEM, PICDEM.net, PICkit, PICtail, PowerSmart, PureSilicon, QMatrix, REAL ICE, Ripple Blocker, RTAX, RTG4, SAM-ICE, Serial Quad I/O, simpleMAP, SimpliPHY, SmartBuffer, SmartHLS, SMART-I.S., storClad, SQI, SuperSwitcher, SuperSwitcher II, Switchtec, SynchroPHY, Total Endurance, Trusted Time, TSHARC, USBCheck, VariSense, VectorBlox, VeriPHY, ViewSpan, WiperLock, XpressConnect, and ZENA are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries.
SQTP is a service mark of Microchip Technology Incorporated in the U.S.A.
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GestIC is a registered trademark of Microchip Technology Germany II GmbH & Co. KG, a subsidiary of Microchip Technology Inc., in other countries.
All other trademarks mentioned herein are property of their respective companies.
© 2022, Microchip Technology Incorporated and its subsidiaries.
All Rights Reserved.
ISBN: 978-1-6683-1055-7
For information regarding Microchip's Quality Management Systems, please visit www.microchip.com/quality.
Table of Contents
Preface 5
Introduction....5
Document Layout 5
Conventions Used in this Guide 6
Recommended Reading....7
The Microchip Website....7
Customer Support 7
Document Revision History 7
Chapter 1. Product Overview
1.1 Introduction 9
1.2 HV860DB1 Device Overview 9
1.3 HV860DB1 Device Electrical Specifications 9
1.4 HV860DB1 Demo Board Kit Contents 9
Chapter 2. Installation and Operation
2.1 Introduction ...... 11
2.2 HV860DB1 Demo Board Connection Diagram 11
2.3 HV860DB1 Demo Board Typical Performance 12
Appendix A. Schematic
A.1 Introduction 13
A.2 HV860DB1 Demo Board – Schematic 14
Appendix B. Bill of Materials (BOM).... 15
Worldwide Sales and Service 16
NOTES:
Preface
NOTICE TO CUSTOMERS
All documentation becomes dated, and this manual is no exception. Microchip tools and documentation are constantly evolving to meet customer needs, so some actual dialogs and/or tool descriptions may differ from those in this document. Please refer to our website (www.microchip.com) to obtain the latest documentation available.
Documents are identified with a "DS" number. This number is located on the bottom of each page, in front of the page number. The numbering convention for the DS number is "DSXXXXXXXXA", where "XXXXXXXXX" is the document number and "A" is the revision level of the document.
For the most up-to-date information on development tools, see the MPLAB ^® IDE online help. Select the Help menu, and then Topics to open a list of available online help files.
INTRODUCTION
This chapter contains general information that will be useful to know before using the HV860DB1 Demo Board. Items discussed in this chapter include:
- Document Layout
• Conventions Used in this Guide
• Recommended Reading
• The Microchip Website - Customer Support
• Document Revision History
DOCUMENT LAYOUT
This document describes how to use the HV860DB1 Demo Board as a development. The manual layout is as follows:
- Chapter 1. "Product Overview" – Important information about the HV860DB1 Demo Board.
- Chapter 2. "Installation and Operation" – Includes instructions on installing and using the HV860DB1 Demo Board.
- Appendix A. "Schematic" – Shows the schematic for the HV860DB1 Demo Board.
- Appendix B. "Bill of Materials (BOM)" – Lists the parts used to build the HV860DB1 Demo Board.
CONVENTIONS USED IN THIS GUIDE
This manual uses the following documentation conventions:
DOCUMENTATION CONVENTIONS
| Description Represents Examples | ||
| Arial font: | ||
| Italic characters Referenced books | oks MPLAB | ^ IDE User's Guide |
| Emphasized text ...is the only compiler... | ||
| Initial caps A window the Output | window | |
| A dialog the Settings dialog | ||
| A menu selection select Enable | Programmer | |
| Quotes A field name in a window | or | "Save project before build" |
| dialog | ||
| Underlined, italic text with right angle bracket | A menu path File>Save | —— |
| Bold characters A dialog button | Click OK | |
| A tab | Click the Power tab | |
| N'Rnnnn | A number in verilog format, where N is the total number of digits, R is the radix and n is a digit. | 4'b0010, 2'hF1 |
| Text in angle brackets <> | A key on the keyboard | Press,, |
| Courier New font: | ||
| Plain Courier New | Sample source code | #define START |
| Filenames | autoexec.bat | |
| File paths | c:\mccl8\h | |
| Keywords | _asm, _endasm, static | |
| Command-line options | -Opa+, -Opa- | |
| Bit values | 0, 1 | |
| Constants | 0xFF, 'A' | |
| Italic Courier New | A variable argument | file.o, where file can be any valid filename |
| Square brackets [] | Optional arguments | mccl8 [options] file [options] |
| Curly brackets and pipe character: { | } | Choice of mutually exclusive arguments; an OR selection | errorlevel {0|1} |
| Ellipses... | Replaces repeated text | var_name [, var_name...] |
| Represents code supplied by user | void main (void) { ... } | |
RECOMMENDED READING
This user's guide describes how to use the HV860DB1 Demo Board. Another useful document is listed below. The following Microchip document is available and recommended as a supplemental reference resource.
- HV860 Data Sheet – “HV860 Low Noise, Dimmable EL Lamp Driver” (DSFP-HV860 C081209).
THE MICROCHIP WEBSITE
Microchip provides online support via our website at www.microchip.com. This website is used as a means to make files and information easily available to customers.
Accessible by using your favorite Internet browser, the website contains the following information:
- Product Support – Data sheets and errata, application notes and sample programs, design resources, user's guides and hardware support documents, latest software releases and archived software
- General Technical Support – Frequently Asked Questions (FAQs), technical support requests, online discussion groups, Microchip consultant program member listing
- Business of Microchip – Product selector and ordering guides, latest Microchip press releases, listing of seminars and events, listings of Microchip sales offices, distributors and factory representatives
CUSTOMER SUPPORT
Users of Microchip products can receive assistance through several channels:
• Distributor or Representative
- Local Sales Office
• Field Application Engineer (FAE)
- Technical Support
Customers should contact their distributor, representative or field application engineer (FAE) for support. Local sales offices are also available to help customers. A listing of sales offices and locations is included in the back of this document.
Technical support is available through the website at:
https://www.microchip.com/support.
DOCUMENT REVISION HISTORY
Revision A (August 2022)
- Converted Supertex document DSDB-HV860DB1 A032813 to Microchip format.
• Made minor corrections. - Updated Appendix B. "Bill of Materials (BOM)".
NOTES:
Chapter 1. Product Overview
1.1 INTRODUCTION
This chapter provides an overview of the HV860DB1 and covers the following:
• HV860DB1 Device Overview
• HV860DB1 Device Electrical Specifications
• HV860DB1 Demo Board Kit Contents
1.2 HV860DB1 DEVICE OVERVIEW
The HV860DB1 Demo Board contains all necessary circuitry to demonstrate the features of the HV860 EL lamp driver. For EL lamp dimming, either a potentiometer or an N-channel open drain PWM signal can be used, but not both.
1.3 HV860DB1 DEVICE ELECTRICAL SPECIFICATIONS
Input Voltage 2.4V to 4.5V
VIN Inductor Supply Voltage....5.5V
Typical Supply Current....10 mA
Lamp Size 3.5 in ^2
Lamp Frequency 200 Hz
Converter Frequency ....150 kHz
1.4 HV860DB1 DEMO BOARD KIT CONTENTS
The HV860DB1 kit includes the following items:
• HV860DB1 Demo Board
text_image
HV860DB1 HV860 8D94 3 3 5 2 MEXICO PG5 2 MEGFIGURE 1-1: Typical HV860DB1 (Top 3D View). Board Actual Dimensions: 20 mm × 25 mm.
Chapter 2. Installation and Operation
2.1 INTRODUCTION
The Microchip HV860DB1 Demo Board contains all necessary circuitry to demonstrate the features of the HV860 EL lamp driver.
Simply connect it to a power supply and a lamp as shown in Figure A.2. For EL lamp dimming, either a potentiometer or an N-channel open drain PWM signal can be used, but not both.
The potentiometer is used as a variable voltage divider to change the voltage at the VREG pin. The V_REF is voltage divided to change the V_REG voltage thereby changing the VCS voltage. The V_CS voltage amplitude, and thereby the lamp brightness, increases when the potentiometer is rotated counter-clockwise, and the lamp brightness decreases when it is rotated clockwise.
2.2 HV860DB1 DEMO BOARD CONNECTION DIAGRAM
text_image
HV860DB1 EN VDD PWM R_SW R_EL C_DD R_DIM C_DIM R_PWM Potentiometer VIN GND VA VB C_IN L_X C_S DFIGURE 2-1: HV860DB1 Demo Board Connection Diagram.
2.2.1 Connections:
EN - (Enable Input)
A CMOS logic input which enables/disables the lamp driver. A logic high (1.5V) enables the driver and a logic low (connect to GND) disables the driver.
VDD - (IC Supply)
Supplies the HV860 EL driver IC. The supplied demo board is optimized for 3.0V operation, with an operating range from 2.4V to 4.5V. It connects to the positive terminal of a power supply.
PWM - (PWM Input)
Supplies the PWM signal for dimming the EL lamp. The frequency of this signal can vary between 20 kHz and 100 kHz. For EL lamp dimming using the PWM input, either the potentiometer has to be removed or its value set to for maximum lamp brightness.
The N-channel open drain PWM signal pulls the 10 kΩ resistor to ground. When the duty cycle of this PWM signal is changed, the effective voltage on the VREG pin is changed. This changes the V_CS voltage, and hence the lamp brightness. The higher the duty cycle, the higher the lamp brightness, and vice versa.
VA and VB - (Lamp Connections)
They connect to the EL lamp terminals. Polarity is irrelevant.
VIN - (Inductor Supply)
Supplies the high voltage power converter. The demo board is optimized for 5.5V operation. It connects to the positive terminal of a power supply.
GND - (Circuit Ground)
Connect to VDD and VIN negative terminals. Supply bypass capacitor for both VDD and VIN are provided on the demo board. External supply bypass capacitors are not required.
Note: All of the above connections must be made before powering up the supply voltages. The VREG pin should not be touched after power-up.
2.3 HV860DB1 DEMO BOARD TYPICAL PERFORMANCE
| Lamp Size V(in2) (V) (V) (mA) (V) (Hz) ft-lm cd/m | V_IN | I_IN | V_CS | f_EL | Brightness | |
| 2 | ||||||
| 3.5 3 5.2 9 110 190 | 6.20 21.21 | |||||
| 3.5 3 5.5 8.4 110 | 190 | 6.22 21.27 | ||||
| 3.5 3 5.8 7.9 110 | 190 | 6.24 21.33 | ||||
Note: The specific external components used in the circuit schematic are: L_X = 220 H Cooper (SD3114-221) or Wurth Elektronik (74404042221), C_S = 3.3 nF 200V NPO and the 2 MΩ potentiometer.
Appendix A. Schematic
A.1 INTRODUCTION
This appendix contains the schematics and layouts of the HV860DB1 Demo Board:
• HV860DB1 Demo Board – Schematic
A.2 HV860DB1 DEMO BOARD - SCHEMATIC
text_image
V_IN + - C_IN 4.7μF 2M Potentiometer 1 2 3 10kΩ 3.3MΩ Cooper Inductor SD3114-221, 220μH n-channel Open Drain PWM signal VREG VREF LX VDD CS 590kΩ RSW-Osc REL-Osc VA 2.0MΩ EN GND VB ON = 1.5V OFF = 0V BAS20HT1 3.3nF, 200V 1206 Package 4Note: The above circuit may be optimized further based on the specifications of the lamp used.
Appendix B. Bill of Materials (BOM)
TABLE B-1: BILL OF MATERIALS (BOM)
| Component | Description Package Manufacturer Part Number | |||
| L_X | 220 μH inductor — | Cooper Industries SD3114-221 | ||
| Wurth Elektronik 74404042221 | ||||
| C_S | 3.3 nF, 200V, NPO chip capacitor 1206 Tecate Industries CMC-200/332JN1206T | |||
| R_SW | 1%, 590 kΩ chip resistor 0603 Any — | |||
| R_EL | 1%, 2 MΩ chip resistor 0603 Any — | |||
| R_DIM | 5%, 3.3 MΩ chip resistor 0603 Any — | |||
| R_PWM | 1%, 10 kΩ chip resistor | 0603 | Any | — |
| C_DIM | Optional capacitor for dimming control | — | — | — |
| C_IN | 4.7 μF, 10V ceramic chip capacitor | 0603 | Any | — |
| C_DD | 0.1 μF, 16V ceramic chip capacitor | 0603 | Any | — |
| Diode | 200V fast recovery diode | SOD-323 | Diodes Incorporated® | BAS20HT1 |
| POT | 2 MΩ potentiometer | — | Bourns®, Inc. | 3352T-205 |
| U1 | EL driver IC | 12-Lead QFN | Microchip Technology, Inc. and its subsidiaries | HV860K7 |
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