& Circuit Protection
Circuit Protection for LED
AVX Lights The Way
www.illuminatedcomponents.com | PHONE: 561-241-8600
The Power Of Light
Lighting the way Forward
Old Technology
Next Generation
Technology
Current Technology
www.illuminatedcomponents.com | PHONE: 561-241-8600
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
www.illuminatedcomponents.com | PHONE: 561-241-8600
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
www.illuminatedcomponents.com | PHONE: 561-241-8600
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
www.illuminatedcomponents.com | PHONE: 561-241-8600
Vin
LED Driver Topologies - Linear
LM317
Rs
C1
NbO or High CV MLCC
(Depending on stack voltage)
LED1
T-Guard VC06LC18X500 *
LED2
Note: TransGuard operating voltage
should be =/> than the LED stack applied voltage
www.illuminatedcomponents.com | PHONE: 561-241-8600
LED Driver Topologies - BUCK
V in
L1
Switch
NbO or High CV MLCC
(Depending on output voltage)
C1
C2
Led
D1
IC1
O UT
PW M
NbO or High CV MLCC
(Depending on input voltage)
FB
G ND
R1
Gnd
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
www.illuminatedcomponents.com | PHONE: 561-241-8600
T-Guard
VC04LC18X500 *
LED Driver Topologies - BOOST
D1
L1
V in
T-Guard VC04LC18X500 *
C1
NbO or High CV MLCC
C2
(Depending on output voltage)
Led
Q1
IC1
NbO or High CV MLC
High Voltahe RMS MOV/MLV
O UT
PW M
G ND
FB
R1
Gnd
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
www.illuminatedcomponents.com | PHONE: 561-241-8600
LED Driver Topologies
BUCK / BOOST
Switch
V in
D1
C1
NbO or High CV MLCC
(Depending on input voltage)
C2
L1
IC1
O UT
PW M
FB
T-Guard VC04LV18X500
Or VC06AG183R0YAT *
C2
U1
NbO or High CV MLCC
(Depending on input voltage)
G ND
R1
Gnd
• 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
www.illuminatedcomponents.com | PHONE: 561-241-8600
High Current/Multiple LEDs
TransGuard VC06LC18X500 *
Oxicap or HiCV
1KV, 222pf HV Ceramic
2220 w flexiterm
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
www.illuminatedcomponents.com | PHONE: 561-241-8600
www.illuminatedcomponents.com | PHONE: 561-241-8600