LED Power Supplies

A Jameco Buyer's Guide


By Robert Cong
Copywriter / Product Manager

Whether it's magnetic, chemical, or electrical, everything needs some form of energy and power. Your lighting needs are no exception. Applications need a power source other than a regular wall outlet such as in architectural lighting, street lighting, decorative lighting, stage and theater lighting, and electronic billboards. For application that have a special lighting component, there are advantages to choosing LED power supplies.
The Power

Billboards are a great way to advertise, but they can also be a pain to change and maintain. Those big, bright LED-lit billboard signs you see when driving on the freeway, can't simply be plugged into the wall. They need a constant source that will provide even distribution of power to each section. Unlike traditional power supplies, LED power supplies provide constant current and/or constant voltage so that you can light up your applications with maximum efficiency.

Electronic BillboardsElectronic Billboards

Many of the LED power supplies are also encased in a splash-proof metal or plastic case for a wider range of uses both indoors and out. Other features you are likely to see on LED power supplies include built-in active PFC (Power Factor Correction) for better efficiency, adjustable output voltage/current for exact customization, dimming function for more functionality, and multiple protection (short-circuit, overload, over-voltage, over-temperature) for added safety.

HLG-240 Series LED Power Supply Mean Well HLG-240 Series LED Power Supply (Size: 9.6"L x 2.7"W x 1.5"H)


Professional Architectural Indoor Lighting
Professional Architectural Indoor Lighting
 
Colorful Lighting at the BarColorful Lighting at the Bar


You can have the lighting style you want in a wider variety of locations, all while saving time and space. You can use them in big industrial size applications or your small garage projects at home. Let your imagination run wild and you'll be sure to wow the crowd.

When choosing an LED power supply, you should first look for a suitable wattage of the system requirements as well as your application methods. There are 3 common types of LED driving methods: directly driven, driven with a series resistor, and driven with a driver IC. See below for a comparison between the three:
Gas Station Lighting Gas Station Lighting Making it
Easier to Change Pricing

Driving method & PSU selection Features Advantage/Disadvantage
Direct drive
Use C.C. power supply
Voltage at the output of the power supply will be equal to the total LED VF. IF will be affected by temperature change. • Lowest price
• Highest efficiency

× Uneven current for paralleled LED strips
× Uneven brightness for paralleled LED strips
× Quick decline in luminance. Short LED lifetime.
With series resistor
Both C.V. or C.C. can be used

Voltage exceeding total LED VF will appear across the series resistor. Moderate IF stability. • Low price with additional resistor cost

× Lowest efficiency Due to resistor power loss.
With driver IC
Use C.V. power supply
IC automatically limits IF to each LED strip, high IF stability. • Slow decline in luminance
• Longest LED lifetime.

× Low efficiency.
× Most expensive

Three Common LED Driving Methods


You should then decide whether the application should have a supply with power factor correction (PFC) function or not. Take a look at the chart below for reference:


Circuit
Topology
Representative
Models
Advantage & Disadvantage Limitations on Application
Non PFC ELN-30
ELN-60
LPLC-18
LPHC-18
LPC-20
LPC-35
LPC-60
LPL-18
LPH-18
LPV-20
LPV-35
LPV-60
LPV-100
Advantage:
• Low cost
• Simple circuit design with reliable electrical
  performance
Disadvantage:
• Not correspondent with PFC demand in
  energy saving
• Cannot meet major norms for LED luminaries
• Not for EU & other major
  markets of LED luminaries
• Cannot meet energy saving
  requirement
• Same electrical charactistic as
  power supply for general purpose
Single
stage PFC
CLG-60
CEN-60
CEN-75
CEN-100
PLN-20
PLN-30
PLN-45
PLN-60
PLC-30
PLC-45
PLC-60
PCD-16
PCD-25
PLP-20
PLP-30
PLP-45
PLP-60
Advantage:
• Low cost
• Simple circuit design
• High efficiency performance on small power
  rating design
Disadvantage:
• High output ripple voltage (15-20 times of two
  stage design)
• Difficult design of feeback circuit
• PF & THD easily affected by design of
  feedback circuit
• No holdup time more susceptible
  to fluctuation of AC mains
• High output ripple current - decrease
  life time of LED module directly
  powered by power supply
• Slow response time of feedback
  circuit, high effect of load
  characteristics
Two stage
PFC+PWM
CLG-100
CLG-150
PLN-100
LPF-40
LPF-40D
LPF-60
LPF-60D
LPF-90
LPF-90D
PLC-100
ULP-150
HLG Series
Advantage:
• Suitable for high power rating design
• Good PFC characteristics
• Easy design of feedback circuit
• Good load characteristic
Disadvantage:
• High cost
• Complicated circuit design
• Can be used for most of field
  applications

Comparison chart of supplies with PFC function and those without


Looking at where the supply will be placed, you need to find a supply with an appropriate housing that will be safe for installation. There are different style enclosures with different IP level ratings, which determine whether the enclosure cases are dust-tight protected, and powerful water-jet protected.

Certain locations also require certain safety certificates. Many lighting applications can be distracting to drivers or obstructive to residential neighborhoods. Whatever the case may be, make sure the power supply you choose conforms to safety laws within your area.

Finally, decide if your application needs to have output voltage adjustment, output current adjustment, or dimming function. You may want to manually change the brightness or adjust the distribution of lighting. This all depends on your certain application. See below for a quick selection map:

Quick Selection Map Quick Selection Map

Series
Model
PFC
Case
Potted
IP
Feature






HLG Series




HLG Series
HLG-80H
HLG-100
HLG-100H
HLG-120
HLG-120H
HLG-150
HLG-150H
HLG-185
HLG-185H
HLG-240
HLG-240H
HLG-320H






Y






Metal






Y






IP67
• High efficiency up to 94%
• Adjustable output voltage and current level
  (A TYPE-IP65)
• UL/CUL/TUV/ CE certified
• Withstand 4KV surge, suitable for LED
  street lighting
• General TYPE: 90~264VAC Input H-TYPE:
  90~305VAC input
• 3 in 1 dimming function
  (1~10VDC, PWM signal or resister)
• Suitable for LED street lighting, outdoor
  LED lighting, and general outdoor applications
  with high IP requirement




CLG Series


CLG Series



CLG-60
CLG-100
CLG-150




Y




Metal




Y




IP67
• Adjustable output voltage and current level
• (CLG-150A-IP65)
• Fully potted for CLG-60/100 (IP67)
• UL/CUL/TUV/CE certified
• Withstand 4KV surge, suitable for LED
  street lighting
• 90~295VAC/277VAC input available
• Suitable for LED street lighting, outdoor LED
  lighting,and general outdoor applications with high
  IP requirement (CLG-100/150)



CEN Series


CEN Series


CEN-60
CEN-75
CEN-100



Y



Metal



Y



IP66
• High efficiency up to 91%
• Economic Class 2 LED power with metal
  enclosure
• Adjustable output voltage and current level
• UL/CUL/TUV/CE certified
• Withstand 4KV surge, suitable for LED
  street lighting
• 90~295VAC/277VAC input available
• Suitable for LED street lighting and outdoor
  lighting


ULP Series

ULP Series


ULP-150


Y

Metal
U bracket


Y
50%


N/A
• High efficiency up to 93%
• Screw terminal type I/O connection, cable length
  can be adjusted by users
• Withstand 4KV surge, suitable for LED
  street lighting
• Suitable for LED street lighting (built-in type)


PLN Series


PLN Series
PLN-20
PLN-30
PLN-45
PLN-60
PLN-100


Y


Plastic


N


IP64
• UL/CUL/TUV/CE certified
• Adjustable output voltage and current level
  (PLN-20: current only)
• 90~295VAC/277VAC input available
• Suitable for LED lighting and LED electrical
  display applications


PLC Series

PLC Series

PLC-30
PLC-45
PLC-60
PLC-100


Y


Plastic


N


N/A
• Screw terminal type I/O connection, cable length
  can be adjusted by users
• UL/CUL/TUV/CE certified
• Adjustable output voltage and current level
• Suitable for indoor LED lighting and LED electrical
  display applications


LPF Series


LPF Series
LPF-40
LPF-40D
LPF-60
LPF-60D
LPF-90/90D


Y


Plastic


Y


IP67
• High efficiency up to 91%
• 90~305VAC/277VAC input available
• D type: 3 in 1 dimming function
  (1~10VDC, PWM signal or resister)
• Suitable for LED street lighting, LED
  electrical displayand indoor LED lighting


PLP Series
PLP Series
PLP-20
PLP-30
PLP-45
PLP-60


Y


PCB


N


N/A

• Economical LED power, low cost
• Adjustable output current level
• Suitable for built-in type LED lighting applications


ELN Series

ELN Series


ELN-30
ELN-60


N


Plastic


N


IP64
• With optional dimming function
• UL/CUL/CE certified
• Adjustable output voltage and current level
• Suitable for indoor LED lighting, LED electrical
  display and general applications with high
  IP requirement


LPC Series
LPV Series


LPC and LPV Series
LPC-20
LPC-35
LPC-60
LPV-20
LPV-35
LPV-60
LPV-100



N



Plastic



Y



IP67
• LPC: constant current model
  LPV: constant voltage model
• Economical Class 2 LED power, low cost
• UL/CUL/CE certified
• Suitable for LED-based decorative lighting,
  outdoor architectural lighting and LED electrical
  displayapplications



LPL Series
LPH Series



LPL and LPH Series


LPL-18
LPH-18
LPLC-18
LPHC-18



N



Plastic



Y



IP67
• LPL/LPH: constant voltage model,
  LPLC/LPHC: constant current model
• Economical Class 2 LED power, low cost
• LPL/LPLC: 115VAC input ;
  LPH/LPHC: 230VAC input
• Suitable for LED-based decorative lighting,
  outdoorarchitectural lighting and LED electrical
  display applicationsand general applications
  with high IP requirement

PCD Series
PCD Series

PCD-16
PCD-25

Y

Plastic

Y
50%

N/A
• AC phase-cut dimming
• Work with leading edge & trailing edge dimmers
• Suitable for indoor LED lighting (AC dimmable)

Have more questions? Send an email to: Tech@Jameco.com for answer.


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