1. The Necessity for LVDC Power in Home Entertainment
Michael Stelts, IEC TC100 1 1

2. Agenda Home entertainment runs on DC power IEC work on LVDC
Panasonic’s perspective

3. Multimedia Products Run on DC
External AC/DC converter
(AC adapters)
Internal AC/DC converter
Internal/External AC/DC
converter with Battery

4. DC Power for Products Saves Energy
Grid
Distribution
Equipment
Equipment ＡＣ
Utility
ＡＣ１2０Ｖ AC
wiring
Low ＤＣ
P.S.
３0％
Loss
Equipment ＤＣ ＡＣ DC
wiring
Utility
ＡＣ１2０Ｖ
efficient
converter
8% Loss
Low ＤＣ Ps
converter
2% Loss
AC adaptors for each product are eliminated
Conversion loss is decreased by batch feeding DC power

5. Small Efficiency Improvements Matter
115M US households (Census Bureau estimate) 8hr/day US household viewing (OECD, 2005) 180W 40” LCD (Sony, 2011) Roughly 166 GW·hr/day consumed by US TVs. If DC distribution saves 8%, that’s 13 GW·hr/day. Nearest power utility to meeting: Potomac River Station Nameplate capacity = 514MW Output/day = 12.3GW·hr/day Energy savings > plant output

6. Power Generation is Migrating to DC
Renewable energy systems
Solar power
Fuel cells
Reserve Power
Home battery storage
PEV storage
Household generation uses DC
Household products use DC

7. DC Sources Create Greater Efficiency
Now: Many AC/DC converters
Energy Generators
AV Equipment
DC⇒AC
AC ⇒DC
DC ⇒AC
AC ⇒DC
AC ⇒DC
Battery
AC ⇒DC
AC ⇒DC
AC ⇒DC
Goal: Direct DC distribution
Energy Generators
AV Equipment
AC ⇒DC
Battery DC AC

8. LVDC for Entertainment Systems
Upper limit = 60V to eliminate shock hazard*
Lower limit = 24V for SSL lighting**
High voltage needed for longer wire runs
Example home entertainment system
43A @5VDC
42” LCD:188W
DVD:28W
(energy saving efficiency catalogue, METI, Japan)
*IEC 60065, **EMerge Alliance specification

9. Home entertainment running at 48V, 4.5A
48VDC is the Sweet Spot
Avoids shock hazards
Maximize length of wiring runs
Easily create 2 x 24V busses
Home entertainment running at 48V, 4.5A
42” LCD:188W
DVD:28W
(energy saving efficiency catalogue, METI, Japan)

10. DC Distribution Infrastructure
Infrastructure for low power equipment
AV equipment PV
DC Distribution
with high-efficiency AC/DC converter
Voltage：48V or less
DC Outlet
Battery
other equipment
Infrastructure for high power equipment
Voltage：300V-400V
White goods, etc.
AC Infrastructure (existing)

11. More LVDC Benefits Opportunity for common worldwide standard
Products can be smaller
AC adaptors can be eliminated
Improved safety – no shock hazard
Smaller carbon footprint

12. Home Entertainment Summary
Home entertainment runs on DC power
Standardization creates great benefits
One plug worldwide
One common input voltage
Reduced shock hazard
Small efficiency improvements are significant, due to the number of entertainment products
Efficiency significantly reduces carbon footprint
Eliminates wall warts and the waste they create

13. IEC Work on LVDC

14. IEC TC100 – Scope and Standards
Audio, video and multimedia systems and equipment
Professional
Consumer
IEC (D1)
IEC (D2)
IEC (D7)
IEC (D16)
IEC (D10)
IEC (D11)
IEC (HD-D5)
IEC (D12)
IEC (TV Metadata)
IEC (MD)
IEC (CD)
IEC series
(Audio measurement)
IEC
(PC audio)
IEC series
(Color management)
IEC series
(DV format)
IEC 62318, 62328
(Multimedia
Home server)
IEC 62227
(DRM)
IEC (IR)
IEC series
(TV)
IEC 62229
IEC 62448
(e-Book)
IEC series
(Audio System)
IEC
(Loudspeaker)
IEC (ISDB)
IEC (DVB)
IEC (DVB-H)
IEC series
(Cable system)
IEC series (Radio)
IEC 62389
(DVD player
measurement)
IEC 60958, 61937
(Digital Audio I/F)
IEC 61883
(Digital AV I/F)

15. LVDC System (in the IEC System)
Wiring (TC23)
Battery (TC21)
Fuel Cells (TC105)
Appliances (TC59)
Lighting (TC34)
PV (TC82)
EV (TC69)

16. IEC Addressing LVDC Today
SG4 is responsible for LVDC strategy
TC100 is responsible for LVDC in multimedia equipment
Standardization Management Board
Technical Committees
Strategy Groups
TC100 AV & multimedia
SG4 LVDC
TC69
Electrical Installation
TC59
white goods
TC23
Electrical accessories

17. Collaboration between TC100 & TC59
IEC TC100 Task Group (TG) for SG4 + TC59 Ad hoc group (AHG) for SG4 = Collaboration on contributions to SG4
SMB TC SG
TC100
(AV equipment)
SG1
TG for SG4
SG2
Collaboration
SG3
Contribute
to SG4
SG4 (LVDC)
TC59
(White Goods)
SG5
AHG for SG4

18. AC Adapter Standardization in IEC TC100
PT is developing an LVDC power supply standard
Scope
Unify AC/DC adapter for Laptop PC by defining DC voltage and its connector shape.
Benefits
Fewer AC adaptors is good for the environment
Reduce product cost by reusing adapters
Simplifies sales and inventory
PT is important work; but, it also demonstrates a need for the long-term solution – LVDC

19. Difficulties in Standardizing AC Adaptors
AC adaptors are designed for specific products, creating an extra layer of complexity
Matching in-rush current of product to adaptor
IEC may be insufficient for leakage current
AC adapter temperature
EMC fluctuations as load changes
Harmonizing safety standards
Some manufacturers used the same AC adaptor on products for years, slightly reducing the benefit
By standardizing LVDC, everyone can design their products to one common power source

20. IEC is an Ideal LVDC Standards Venue
Experts in every area (Technical Committees)
Opportunity for a common worldwide standard
Common safety practices
Fewer connectors
Fewer voltages
One frequency １３ 16 １６ 10 15
Domestic Current 60 ５０ ６０ 50
Domestic Frequency ＵＫ
Ｉｔａｌｙ
Ｇｅｒｍａｎｙ
２３０Ｖ
２２０Ｖ
１２０Ｖ
１００Ｖ
Domestic Voltage
Ｊａｐａｎ
Ｃｈｉｎａ
Domestic AC socket
Ｆｒａｎｃｅ
ＵＳＡ
Country

21. LVDC Perspective

22. Panasonic Corporation in brief
Net Sales: $100B (approx.)
Business Segments
Digital AV & Networks
Home Appliance
Components and Devices
Panasonic Electric Works (PEW)
PanaHome
SANYO

23. LVDC is for more than TVs
AC infrastructure
Heater
Grid AC
Cooker
DC low-power infrastructure
Solar System
Electric Works
Distributor
ＬＥＤ
Fan PC
Electric Works TV
Electric Works BD
Wire
TEL
Fuel cell System
DC high-power infrastructure
Electric Works
Battery
Air Conditioner
Refrigerator

24. UC San Diego

25. Kasai Green Energy Park

26. Green Energy Park LVDC Project
DC power distribution directly from PV to PC and LED
Proving test in Kasai, West Japan

27. Eco ideas House, Tokyo

28. Eco Ideas House LVDC Project
AC/DC hybrid wiring system
Reducing losses cause by AC/DC conversions
eco ideas HOUSE in Tokyo

29. Panasonic Approach to LVDC
LVDC is not just for home entertainment… it is needed throughout the home.
Panasonic is considering LVDC for all these businesses:
AV equipment
Home appliance
Lighting PV
Battery
Electrical distribution and wiring
Home construction

30. End