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Collaborative Design Innovation in LED

Contents1. LED Driver Selection Criteria

2. Collaborative approach to achieve end application goal

3. Collaboration Scope

4. Harvard – Sylvania Case Study

5. Conclusions

Driver Key Selection Criteria

Performance

Cost

ReliabilityFeatures

Size

Driver Key Selection Criteria Cont.

Efficiency

Power Factor

Surge Rating

Compliance

Performance

0.00W 2.00W 4.00W 6.00W 8.00W 10.00W 12.00W 14.00W 16.00W50%

55%

60%

65%

70%

75%

80%

85%

90%

95%

100%

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.00CL Driver Efficiency & PF Optimisation

CL350 Efficiency CL350L Efficiency

CL350 PF CL350L PF

Power (W)

Effici

ency

(%)

Pow

er F

acto

r

Driver Key Selection Criteria Cont.

Thermals

Electrolytic

Reliability&

Lifetime

CLR50/CL50 CL Standard / CLK

Driver Key Selection Criteria Cont.

Application Constraints

Standard Product?

Size

Driver Key Selection Criteria Cont.

Dimming

Adjustable OutputThermal Feedback

Auxiliary o/p

Bells & Whistles?

Features

Driver Key Selection Criteria Cont.

Cost

Collaboration Scope

Collaborative Paths

LED Boards Drivers

Harvard – Havells Sylvania Collaboration

1. Why?

• Mainly Size / Form Factor

• Targeted Performance

• Interface

• Optimum total cost of final product

Harvard – Sylvania Collaboration Cont.

1. Project:

• Develop bespoke LED driver

• ~18W power • switchable

output• 1-10V dimming

• Efficiency >87%

• PF > 0.95

• Reliability > 50,000 hours

Harvard – Sylvania Collaboration Cont.

1. Challenges

• Space

• Interface

• Safety Clearances

• Time & Cost

Kick Off Specification Agreed

Concept Agreed

Samples Delivery

Samples Approval

Design Modifications Volume Delivery

Harvard – Sylvania Collaboration Cont.

1. Successful Project

• On time

• To Specification

http://www.havells-sylvania.com/led/lumiance/Inverto

Conclusions1. Standard product

may not be suitable for all applications

2. Optimisation around the application can be beneficial in certain cases

3. Close collaboration can yield win-win scenario

4. Collaboration is easy

Thank you