HV9805 - Unspecified Microchip - Free user manual and instructions

USER MANUAL HV9805 Microchip

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All other trademarks mentioned herein are property of their respective companies.

© 2015, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved.

ISBN: 978-1-63277-336-4

QUALITY MANAGEMENT SYSTEM

CERTIFIED BY DNV

=ISO/TS 16949=

Microchip received ISO/TS-16949:2009 certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona; Gresham, Oregon and design centers in California and India. The Company's quality system processes and procedures are for its PIC® MCUs and dsPIO® DSCs, KEELoo® code hopping devices, Serial EEPROMs, microperipherals, nonvolatile memory and analog products. In addition, Microchip's quality system for the design and manufacture of development systems is ISO 9001:2000 certified.

Object of Declaration: HV9805 230V _AC SEPIC Evaluation Board

EU Declaration of Conformity

Manufacturer:

Microchip Technology Inc.

2355 W. Chandler Blvd.

Chandler, Arizona, 85224-6199

USA

This declaration of conformity is issued by the manufacturer.

The development/evaluation tool is designed to be used for research and development in a laboratory environment. This development/evaluation tool is not a Finished Appliance, nor is it intended for incorporation into Finished Appliances that are made commercially available as single functional units to end users under EU EMC Directive 2004/108/EC and as supported by the European Commission's Guide for the EMC Directive 2004/108/EC (8 ^th February 2010).

This development/evaluation tool complies with EU RoHS2 Directive 2011/65/EU.

This development/evaluation tool, when incorporating wireless and radio-telecom functionality, is in compliance with the essential requirement and other relevant provisions of the R&TTE Directive 1999/5/EC and the FCC rules as stated in the declaration of conformity provided in the module datasheet and the module product page available at www.microchip.com.

For information regarding the exclusive, limited warranties applicable to Microchip products, please see Microchip's standard terms and conditions of sale, which are printed on our sales documentation and available at www.microchip.com.

Signed for and on behalf of Microchip Technology Inc. at Chandler, Arizona, USA

Derek Carlson

VP Development Tools

NOTES:

Table of Contents

Preface 7

Introduction....7

Document Layout 7

Conventions Used in this Guide 8

Recommended Reading....9

The Microchip Web Site 9

Customer Support 9

Revision History 9

Chapter 1. Product Overview

1.1 Introduction ...... 11
1.2 Specifications 11
1.3 Device Summary 11
1.4 What Does the HV9805 230V _AC SEPIC Evaluation Board Include? ..... 12

Chapter 2. Installation and Operation

2.1 Safety Caution 13
2.2 Getting Started 13

2.2.1 Additional Tools Required or Desirable for Evaluation 13

2.3 Setup Procedure 14
2.3.1 AC Input Considerations 14
2.3.2 LED Load Considerations 14
2.4 Evaluating the Application 14

Appendix A. Schematic and Layouts

A.1 Introduction 15
A.2 Board – Schematic 16
A.3 Board – Top Silk Screen, Paste Mask, Copper Pads 17
A.4 Board – Top Assembly, Copper Pads 17
A.5 Board – Top Copper, Paste Mask 17
A.6 Board – Bottom Silk Screen, Paste Mask, Copper Pads 18
A.7 Board – Bottom Assembly, Copper Pads 18
A.8 Board – Bottom Copper, Paste Mask 18

Appendix B. Bill of Materials (BOM)

Appendix C. Performance Data

C.1 Performance Data versus AC Line Voltage 21
C.2 Performance Graphs 21

C.2.1 Efficiency Vs. Line Voltage 21

C.2.2 Total Harmonic Distortion Vs. Line Voltage 22

C.2.3 Power Factor Vs. Line Voltage 22

Appendix D. Test Points and Waveforms

D.1 Test Points Description 24
D.2 Waveform Examples 24

D.2.1 Line Current, LED Current 24
D.2.2 BUS, BVS 27
D.2.3 DRN, CAP 27
D.2.4 DRN, REC 28
D.2.5 DRN, DRV 29
D.2.6 Inductor Currents 32
D.2.7 BUS, REG, HVS, CRG, CRS 34
D.2.8 HVR 36
D.2.9 CSH 37
D.2.10 VDD 39

Appendix E. EMI

E.1 CISPR15 Conducted Emissions 41

E.1.1 Line 41
E.1.2 Neutral 41

Worldwide Sales and Service 42

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 web site (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 HV9805 230V _AC SEPIC Evaluation Board. Items discussed in this chapter include:

• Document Layout
• Conventions Used in this Guide
• Recommended Reading
  • The Microchip Web Site
• Customer Support
• Revision History

DOCUMENT LAYOUT

This document describes how to use the HV9805 230V _AC SEPIC Evaluation Board. The document is organized as follows:

• Chapter 1. “Product Overview” – Includes general information about the HV9805 230V _AC SEPIC Evaluation Board.
• Chapter 2. “Installation and Operation” – Includes instructions for connecting and using the board.
• Appendix A. “Schematic and Layouts” – Shows the schematic and layout diagrams for the HV9805 230V _AC SEPIC Evaluation Board.
• Appendix B. “Bill of Materials (BOM)” – Lists the parts used to build the HV9805 230V _AC SEPIC Evaluation Board.
• Appendix C. “Performance Data” – Includes performance data on the HV9805 230V _AC SEPIC Evaluation Board by way of tables and graphs.
• Appendix D. “Test Points and Waveforms” – Describes test points and waveforms for the HV9805 230V _AC SEPIC Evaluation Board.
• Appendix E. "Electromagnetic Interference" – Includes conducted EMI measurements of the HV9805 230V _AC SEPIC Evaluation 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	ut window
	A dialog the Settings dialog
	A menu selection select Enable Programmer
Quotes A field name in a window or dialog		"Save project before build"
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 HV9805 230V _AC SEPIC Evaluation Board. Other useful documents are listed below. The following Microchip document is available and recommended as a supplemental reference resource.

- HV9805 Data Sheet – “Off-Line LED Driver with True DC Output Current” (DS20005374).

Microchip provides online support via our web site at www.microchip.com. This web site is used as a means to make files and information easily available to customers. Accessible by using your favorite Internet browser, the web site 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 web site at:

http://www.microchip.com/support.

REVISION HISTORY

Revision A (April 2015)

- This is the initial release of this document.

NOTES:

Chapter 1. Product Overview

1.1 INTRODUCTION

The HV9805 230V AC SEPIC Evaluation Board is suited for driving a 125V/100 mA LED load from a 230V AC source.

The single-ended primary-inductor converter (SEPIC) configuration extends the application range of the HV9805 driver Integrated Circuit (IC) to lower LED load voltages than otherwise possible with the boost configuration. Many features of the boost configuration are retained, such as a true direct current drive of the LED load, high input power factor, high efficiency and simple magnetics.

The SEPIC configuration can be used to advantage with any of the common AC voltage levels, such as 100V_AC , 120V_AC , 230V_AC , 277V_AC and 24V_AC .

Note that the boost topology can process more power than the SEPIC topology for a given current rating of the converter switch. Whereas the switch of the boost topology carries the line current only during on-time of the switch, the switch of the SEPIC topology carries both the line current (inductor current L51) and the load current (inductor current L50) during on-time of the switch. Accordingly, the power handling capability of the SEPIC converter is lower than the boost converter for a given current rating of the switch. It is also worth noting that the SEPIC power rating drops with output voltage, since a lower output voltage translates into a larger load current and thereby a larger switch current.

1.2 BOARD FEATURES

The HV9805 230V _AC SEPIC Evaluation Board has the following features:

• AC Line Voltage: 230 V RMS (± 15%)
• DC Load Voltage: 125 V DC
• DC Load Current: 100 mA DC
• Output Power: 12.5W
• Power Factor (PF): 98.9%
• Total Harmonic Distortion (THD): 9.6%
• Efficiency: 86.9%
- Output overvoltage protection: Yes
• Electromagnetic Interference (EMI): Satisfies CISPR 15 limits
• THD: Satisfies EN 61000-3-2 Class C limits
• Board Dimensions: 6.400 x 2.000 inches

1.3 HV9805 DEVICE SUMMARY

The evaluation board features the HV9805 LED driver IC. The HV9805 device is described in the HV9805 Data Sheet – “Off-Line LED Driver with True DC Output Current” (DS20005374).

The standard HV9805 application circuit supplies a true DC current to the LED load by using a converter for AC to DC power conversion, and a linear post regulator for constant current regulation of the LED load current. By nature of the boost converter, the LED load voltage should be higher than the peak AC line voltage.

A lower LED load voltage can be accommodated by the use of a SEPIC converter. The SEPIC provides a solution where the LED load voltage is either higher or lower than the peak AC line voltage; as the SEPIC converter is capable of bucking and boosting the input voltage.

1.4 NOTES ON THE EVALUATION BOARD DESIGN

1.4.1 Surge Protection and Voltage Withstand Capability

The evaluation board demonstrates the basic functionality of the HV9805 in a SEPIC configuration. No special effort was made to include measures for transient overvoltage protection. Such protection typically involves the addition of at least one stage of metal-oxide varistor (MOV) protection and the coordination of the voltage withstand capability of components exposed to line voltage transients.

1.4.2 LED Current Regulator Oscillation

The first-released evaluation board exhibits high-frequency oscillation of the drain voltage of pass transistor M2. This oscillation does not affect the functionality of the board significantly.

The drain voltage oscillation can be suppressed by including 100 kΩ in series with the gate lead of pass transistor M2.

The traces relating to the headroom voltage (test points REG and HVS), as shown in Appendix D, were captured with the suppression resistor in place.

1.4.3 Harmonic Distortion

Harmonic distortion can be lowered by increasing the capacitance of the compensation capacitor C4.

1.5 WHAT DOES THE HV9805 230V AC SEPIC EVALUATION BOARD INCLUDE?

The HV9805 230V _AC SEPIC Evaluation Board includes:

• HV9805 230V AC SEPIC Evaluation Board (ADM00656)
• Information Sheet

Chapter 2. Installation and Operation

2.1 SAFETY CAUTION

WARNING

Working with this board can cause serious bodily harm or death. Connecting the board to a source of line voltage will result in the presence of hazardous voltage throughout the system including the LED load and any attached instrumentation. The board should only be handled by persons well aware of the dangers involved with working on live electrical equipment.

Extreme care should be taken to protect against electric shock. Disconnect the board before attempting to make any changes to the system configuration. Always work with another person nearby who can offer assistance in case of an emergency. Wear safety glasses for eye protection.

NOTICE

The electrolytic capacitor C50 carries a hazardous voltage for an extended time after shutdown of the LED driver board. Capacitor C50 will slowly discharge by way of resistors R18 and R19, as well as test point W3, the LED load, test point W4 and resistors R15 and R11, or at a faster rate if a resistor is purposely added across the terminals of capacitor C50. Check the capacitor voltage before handling the board. Observe polarity for all steps to prevent board damage.

2.2 GETTING STARTED

The HV9805 230V AC SEPIC Evaluation Board is fully assembled and tested. The board requires the use of an external AC source (230V AC ) and an external LED load (125V DC , 100 mA DC ).

The board features metal loop-style test points for making connections to the AC line and the LED load and test vias for probing certain circuit nodes.

2.2.1 Additional Tools Required or Desirable for Evaluation

A list of additional tools that are required or may be used during evaluation include:

• DC and AC voltage and current meters
- A power analyzer for measuring the AC power and the AC power factor
- An oscilloscope for characterizing waveforms
- A variable transformer for adjusting the AC line voltage
- An isolation transformer (if an oscilloscope is attached to board circuitry)

2.3 SETUP PROCEDURE

To operate the HV9805 230V _AC SEPIC Evaluation Board, the following steps must be completed:

1. Attach the LED load to the output test points W3 and W4, labeled as POS and NEG on the board. Observe the polarity of connections. Connect the anode of the LED load to test point W3 (POS) and the cathode to test point W4 (NEG).
2. Connect the AC source to the input test points W1 and W2. Both terminals are also marked as 'AC'.

2.3.1 AC Input Considerations

The AC voltage can either be applied in full or be brought up gradually with a variable transformer.

The external circuit for the HV9805's BVS pin has been adapted to the SEPIC topology, offering protection against line undervoltage and against output overvoltage or an open load condition.

The undervoltage lockout circuit (R12, R13, R14, C6, D1) disables the driver when the line voltage is less than approximately 200V_AC when the bus voltage is zero. The threshold changes to a lower value when a non-zero bus voltage is present. A non-zero bus voltage can be the result of driver operation prior to a shutdown event, or can be caused by a gradual build-up when the line voltage is gradually increased by a variable transformer. A more sophisticated circuit is required if the undervoltage threshold dependency on bus voltage is undesirable.

The overvoltage protection circuit disables the driver when the output voltage rises above 150V_DC . The output overvoltage protection is non-latching, meaning that the driver will cyclically turn on and off when an LED load overvoltage condition or an output open circuit condition is present.

2.3.2 LED Load Considerations

The driver is designed for a load voltage of 125V_DC and a load current of 100 mA_DC . The load current is fixed and set by the resistors R17 and R20.

The board can be operated with substantially lower LED voltage. Operation at lower LED voltage results in loss of efficiency, lower power factor and higher harmonic distortion, as shown in Table 2-1.

TABLE 2-1:

Test V	LED	ILED	PLED	VAC	IAC	PAC	EFF THD PF
#	V_DC	mA_DC	W	V_RMS	mA_RMS	W	%	%	%
1	124.5	104.0	12.93	230.3	63.7	14.62	88.5	6.33	99.6
2	113.6	104.0	11.81	230.3	58.4	13.39	88.2	7.34	99.5
3	102.8	104.0	10.69	230.3	53.3	12.19	87.7	8.76	99.4
4	92.4	104.0	9.61	230.3	48.4	11.05	87.0	10.7	99.1
5	81.4	104.0	8.47	230.3	43.2	9.83	86.1	13.3	98.8
6	70.5	103.9	7.32	230.3	38.1	8.62	85.0	16.7	98.2
7	59.6	103.9	6.19	230.3	33.1	7.42	83.4	21.2	97.2

2.4 EVALUATING THE APPLICATION

Typical voltage and waveforms are provided in Appendix D. “Test Points and Waveforms”.

Appendix A. Schematic and Layouts

A.1 INTRODUCTION

This appendix contains the following schematics and layouts for the HV9805 230V _AC SEPIC Evaluation Board:

• Board – Schematic
• Board – Top Silk Screen, Paste Mask, Copper Pads
• Board – Top Assembly, Copper Pads
• Board – Top Copper, Copper Pads
• Board – Bottom Silk Screen, Paste Mask, Copper Pads
• Board – Bottom Assembly, Copper Pads
• Board – Bottom Copper, Copper Pads

A.2 BOARD - SCHEMATIC

W1 AC F50 1A W2 AC CMC1 4.7m BR1 MB6S C53 10n L52 5.6m C52 10n R1 1M R2 1M DRN 2 M1 IPD65R1K4C6 Z1 18V C1 100n L51 10m L50 1.5m CAP D2 US1K BUS C51 10n L50 3 C50 100u W3 POS W4 NEG R12 1.1M R13 1.1M R14 10k C6 2.2u D1 D914 3 D3 D914 1 C7 10n R16 100k C8 100n R18 909k R19 10k REG R15 15k R11 10k Z3 4.7V Z2 18V DRV BVS HVS IC1 HV9805 CRG 7 CRG 1 3 CRS 6 CRS VDD GND HVR VDD C5 10u GND HVR R9 1k C3 100n R17 20 R20 20

A.3 BOARD – TOP SILK SCREEN, PASTE MASK, COPPER PADS

HV9805 SEPIC 230VAC 125VDC, 100mA MICROCHIP CE ADM00656

A.4 BOARD – TOP ASSEMBLY, COPPER PADS

PCB PN 04-10394 ASSY PN 02-10394

A.5 BOARD - TOP COPPER, COPPER PADS

Pure electrical circuit lines without any symbols or text, rendered in red and green with no readable content.

A.6 BOARD – BOTTOM SILK SCREEN, PASTE MASK, COPPER PADS

Pure electrical circuit lines without any symbols

Appendix B. Bill of Materials (BOM)

TABLE B-1: BILL OF MATERIALS (BOM)

Qty.	Reference Description	Manufacturer Part Number
1 BR1	Diode Bridge	600V 0.5A MBS Fairchild Semiconductor®	MB6S
3 C1,	C3, C8 Capacitor	Ceramic X7R 10%50VDC0805 100 nF	Yageo Corporation CC0805K	RX7R9BB104
1 C2	Capacitor Ceramic	C0G 5%1000VDC1206 10 pF	Kemet®	CL31C100JIFNNNE
2 C4,	C6 Capacitor	Ceramic X7R 10%16VDC0805 2.2 μF	TDK Corporation	C2012X7R1C225K125AB
1	C5	Capacitor Ceramic X7R 10%25VDC1206 10 μF	Samsung Electro-Mechan-ics America, Inc.	CL31B106KAHNFNE
1	C7	Capacitor Ceramic X7R 10%50VDC0805 10 nF	Yageo Corporation CC0805K	RX7R9BB103
1	C50	Capacitor Electrolytic 105C20% 100 μF 200V	Nichicon Corporation	UCS2D101MHD
3	C51, C52,C53	Capacitor Film 630VDC20%10 nF	EPCOS AG	B32521N8103M
1 CMC1	Common Mode Line Filter 4.7mH		Würth Elektronik	744220
2 D1,	D3	Diode Switching 75V 200 MASOT23	Diodes® Incorporated	MMBD914-7-F
1	D2	Diode Ultra-Fast 800V 1A SMA	Diodes Incorporated	US1K-13-F
1 F50	1A	Radial Leaded T Fuse,300VAC	Littelfuse®	38311000000
1 IC1	IC LED Driver	MSOP-10LHV9805	Microchip Technology Inc.	HV9805MG-G
1 L50	Inductor 1.5 mH 600 mA Axial Bourns®, Inc.			5900-152-RC
1	L51	Inductor 10 mH 250 mA Axial	Bourns, Inc.	5900-103-RC
1	L52	Inductor Radial 5.6 mH	Würth Elektronik	744731562
1 M1	MOSFET N-Ch. 650V 8.3ADPAK		Infineon Technologies AG IPD65R1K4C6
1 M2	MOSFET N-Ch. 300V 350 mASC73		NXP Semiconductors	BSP130, 115
1 PCB	HV9805 230V AC SEPIC Eval-uation Board - Printed CircuitBoard		Microchip Technology Inc.	04-10394
2 R1,	R2	Resistor ThkF, 1/8W 100ppmC 5% 0805 1MΩ	Panasonic® - ECG	ERJ-6ENF1004V
2 R3,	R6	Resistor ThkF, 1/4W 100ppmC 1% 1206 2.7Ω	Yageo Corporation RC1206FR-072R7L
2 R4,	R5	Resistor ThkF, 1/8W 100ppmC 1% 0805 33Ω	Yageo Corporation RC0805FR-0733RL
Qty.	Reference	Description	Manufacturer	Part Number
5 R7,	R8, R11, R14, R19	Resistor ThkF, 1/8W 100 ppmC 1% 0805 10kΩ	Yageo Corporation RC0805F	R-0710KL
1 R9	Resistor ThkF,	1/8W 100 ppmC 1% 0805 1kΩ	Panasonic – ECG ERJ-6ENF	1001V
1 R10	Resistor ThkF,	1/8W 100 ppmC 1% 0805 270Ω	Panasonic – ECG ERJ-6ENF	2700V
2 R12,	R13 Resistor	ThkF, 1/8W 100 ppmC 5% 0805 1.1MΩ	Panasonic – ECG ERJ-6ENF	1104V
1 R15	Resistor ThkF,	1/8W 100 ppmC 1% 0805 15kΩ	Panasonic – ECG ERJ-6ENF	1502V
1 R16	Resistor ThkF,	1/8W 100 ppmC 1% 0805 100kΩ	Yageo Corporation RC0805F	R-07100KL
2 R17,	R20 Resistor	ThkF, 1/4W 100 ppmC 1% 1206 20Ω	Yageo Corporation RC1206F	R-0720RL
1 R18	Resistor ThkF,	1/8W 100 ppmC 1% 0805 909 kΩ	Panasonic – ECG ERJ-6ENF	9093V
4 W1,	W2, W3, W4	Test Point multi-purpose white	Keystone Electronics Corp. 50	12
2 Z1,	Z2 Diode Zener,	18V 500MW SOD123	Diodes Incorporated DDZ18C	-7
1 Z3	Diode Zener, 4.7	TV 350MW SOT23	Diodes Incorporated BZX84C	4V7-7-F

Note: The components listed in this Bill of Materials are representative of the PCB assembly. The released BOM used in manufacturing uses all RoHS-compliant components.

Appendix C. Performance Data

C.1 PERFORMANCE DATA VERSUS AC LINE VOLTAGE

The following performance data was gathered with a representative sample of the evaluation board connected to a 125V/100 mA LED load. The performance graphs are a graphical representation of the measurement data of Table C-1.

TABLE C-1: PERFORMANCE DATA

V_AC (V_RMS)	I_AC (mA_RMS)	P_AC (W)	THD(%)	PF(%)	V_LED (V_DC)	I_LED (mA_DC)	P_LED (W)	EFF(%)
190.9 77	0 14.63 6.0 9	9.5 123.7 10	3.3 12.78 87	3
210.6 70	0 14.65 7.3 9	9.3 123.7 10	3.3 12.77 87	2
230.7 64	4 14.69 9.6 9	8.9 123.6 10	3.3 12.77 86	9
250.6 59.8	8 14.74 12.5	98.4 123.6 10	3.2 12.76 86.6
270.3 56.0	14.81 15.8	97.7 123.6	103.2	12.76 86.1

C.2 PERFORMANCE GRAPHS

FIGURE C-1: Efficiency vs. Line Voltage.

FIGURE C-2: Total Harmonic Distortion vs. Line Voltage.

FIGURE C-3: Power Factor vs. Line Voltage.

NOTES:

Appendix D. Test Points and Waveforms

D.1 TEST POINTS DESCRIPTION

TABLE D-1: TEST POINTS

Name Description
BUS Power stage, bus capacitor, output voltage
BVS Control IC input, bus capacitor, output sense voltage
CAP Power stage, second switching node, switching voltage
CRG Control IC output, constant current regulator, gate control voltage
CRS Control IC input, constant current regulator, LED current sense voltage
CSH Control IC input, current sense resistor voltage, high side
CSL Control IC input, current sense resistor voltage, low side
DRN Power stage, external FET, drain voltage
DRV Control IC output, external FET control voltage
GND Ground
HVR Control IC output, headroom voltage regulator, amplifier output voltage
HVS Control IC input, headroom voltage regulator, headroom sense voltage
REC Power stage, rectified line voltage
REG Power stage, constant current regulator, headroom voltage
VDD V	_DD supply voltage

Note: The naming of test points on this board does not follow the TP1, TP2 format. Test points on the board are identified by the names as given in Table D-1.

D.2 WAVEFORM EXAMPLES

The voltage waveforms in the following oscillograms are marked with the name of the corresponding test points. Current waveforms were taken with a DC current probe.

Line current was measured by attaching the probe to an AC input lead and the LED current was measured by attaching the probe to an output lead. The inductor currents L50 and L51 were measured by inserting temporary leads in series with the inductors and attaching the probe to the temporary leads.

D.2.1 Line Current, LED Current

FIGURE D-1: AC Input Voltage at 190V AC

FIGURE D-2: AC Input Voltage at 210V AC.

FIGURE D-3: AC Input Voltage at 230V
AC.

FIGURE D-4: AC Input Voltage at 250V
AC.

FIGURE D-5: AC Input Voltage at 270V

AC.

D.2.2 BUS, BVS

FIGURE D-6: Test Points BUS, BVS and the Line Current at a Line Voltage of 230V_AC .

D.2.3 DRN, CAP

FIGURE D-7: Test Point DRN and the Line Current at a Line Voltage of 230V

AC·

FIGURE D-8: Test Point CAP and the Line Current at a Line Voltage of 230V

AC

D.2.4 DRN, REC

FIGURE D-9: Test Points DRN and REC and the Line Current at a Line Voltage of 230V_AC .

FIGURE D-10: Test Points DRN and REC Near the Peak of the Line Voltage at a Line Voltage of 230V_AC .

D.2.5 DRN, DRV

FIGURE D-11: Test Points DRN and DRV at a Line Voltage of 230V AC.

FIGURE D-12: Test Points DRN and DRV at Point A with Reference to Figure D-11.

FIGURE D-13: Test Points DRN and DRV at Point B with Reference to Figure D-11.

FIGURE D-14: Test Points DRN and DRV at Point C with Reference to Figure D-11.

FIGURE D-15: Test Points DRN and DRV at Point D with Reference to Figure D-11.

FIGURE D-16: Test Points DRN and DRV at Point E with Reference to Figure D-11.

D.2.6 Inductor Currents

FIGURE D-17: Inductor Currents L50 L51 Current at a Line Voltage of 230V

AC·

FIGURE D-18: Inductor Currents L50 and L51 Near the Peak of Line Voltage at a Line Voltage of 230V_AC .

FIGURE D-19: Inductor Currents L50 and L51 Near the 45° Point of the Line Voltage at a Line Voltage of 230V_AC .

FIGURE D-20: Inductor Currents L50 and L51 and the Drain Voltage DRN Near the 45° Point of the Line Voltage at a Line Voltage of 230V_AC .

D.2.7 BUS, REG, HVS, CRG, CRS

FIGURE D-21: Test Points BUS, REG and Line Current at a Line Voltage of 230V_AC .

FIGURE D-22: Test Points BUS, REG and Line Current at a Line Voltage of 230V_AC .

FIGURE D-23: Test Points REG and HVS at a Line Voltage of 230V

AC·

FIGURE D-24: Test Points REG, CRG and CRS at a Line Voltage of 230V

AC·

D.2.8 HVR

FIGURE D-25: Test Point HVR and the Line Current at a Line Voltage of 230V

AC·

D.2.9 CSH

FIGURE D-26: Test Point CSH and the Line Current at a Line Voltage of 230V
AC

FIGURE D-27: Test Point CSH and the Line Current at a Line Voltage of 230V

AC.

FIGURE D-28: Test Point CSH and the Line Current at a Line Voltage of 230V
AC.

FIGURE D-29: Test Point CSH and the Line Current at a Line Voltage of 230V

AC.

D.2.10 V
DD

FIGURE D-30: Test Point V DD and the Line Current at a Line Voltage of 15VAC .

FIGURE D-31: Test Point V DD and the Line Current at a Line Voltage of 30VAC .

FIGURE D-32: Test Point V DD and the Line Current at a Line Voltage of 230VAC .

NOTES:

Appendix E. Electromagnetic Interference

E.1 CISPR15 CONDUCTED EMISSIONS

E.1.1 Line

E.1.2 Neutral

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