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Circuit Protection for LED - PowerPoint PPT Presentation


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& Circuit Protection. Circuit Protection for LED. AVX Lights The Way. The Power Of Light Lighting the way Forward. Old Technology. Next Generation Technology. Current Technology. LED Applications. Architectural lighting Discrete LED lighting Display case lighting Electronic signs

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Presentation Transcript
slide1

& Circuit Protection

Circuit Protection for LED

AVX Lights The Way

the power of light lighting the way forward
The Power Of LightLighting the way Forward

Old Technology

Next Generation

Technology

Current Technology

slide3

LED Applications

  • Architectural lighting
  • Discrete LED lighting
  • Display case lighting
  • Electronic signs
  • Mass transit lighting and signaling
  • Theatrical lighting
  • Traffic signals
  • Under cabinet lighting
  • Automotive lighting
  • Indoor/Outdoor lighting
  • Laptops/portable displays
what is driving the lighting market to led and ssl
What is Driving the Lighting Market to LED and SSL?
  • Why are LED’s being used in new lighting applications?
  • Rising cost of energy
  • Falling cost of technology
    • LED cost per lumen decreased by 30% over the past year
  • Government regulations
    • RoHs (reduction in mercury content impact CFL devices)
    • Emissions reduction targets
    • Building performance requirements
    • Increase in use of lighting controls
    • Energy efficiency requirements
led circuit protection
LED & Circuit Protection
  • LED light output is directly proportional to the forward current
    • More Power = brighter lights
    • More Power = more need for capacitors and LOW LEAKAGE circuit protection equipment
  • A drive/control circuit must be used to control the LED’s current
    • More ICs = increased component count
  • LED’s reverse breakdown voltage usually low (5V to 10V)
    • The designer must be careful to insure

protection of the device

  • LED’s are ESD sensitive
    • More opportunities for varistor based product
led driver topologies linear
LED Driver Topologies - Linear

T-Guard VC06LC18X500 *

NbO or High CV MLCC

(Depending on stack voltage)

Note: TransGuard operating voltage

should be =/> than the LED stack applied voltage

led driver topologies buck
LED Driver Topologies - BUCK

NbO or High CV MLCC

(Depending on output voltage)

T-Guard

VC04LC18X500 *

NbO or High CV MLCC

(Depending on input voltage)

Buck, or step-down, voltage converters produce an average output voltage lower than the input source voltage.

Note: TransGuard operating voltage

should be =/> than the LED stack applied voltage

led driver topologies boost
LED Driver Topologies - BOOST

T-Guard VC04LC18X500 *

NbO or High CV MLCC

(Depending on output voltage)

NbO or High CV MLC

High Voltahe RMS MOV/MLV

Boost, or step-up, converters produce an average output voltage higher than the input source voltage.

Two AVX

Caps!

Note: TransGuard operating voltage

should be =/> than the LED stack applied voltage

led driver topologies buck boost
LED Driver Topologies BUCK / BOOST

T-Guard VC04LV18X500

Or VC06AG183R0YAT *

C2

NbO or High CV MLCC

(Depending on input voltage)

NbO or High CV MLCC

(Depending on input voltage)

  • A combination of buck and boost.
  • Output is inverted, and its magnitude can be less or
  • greater than the input.

Note: TransGuard operating voltage

should be =/> than the LED stack applied voltage

high current multiple leds
High Current/Multiple LEDs

TransGuard VC06LC18X500 *

1KV, 222pf HV Ceramic

2220 w flexiterm

Oxicap or HiCV

HiCV or Oxicap

  • AVX Solution
  • 9 AVX Capacitors
  • 1 Varistor
  • 1 fuse
  • multiple connectors!

Oxicap or HiCV

Note: TransGuard operating voltage

should be =/> than the LED stack applied voltage

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