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The high eciency and long

lietime o LEDs are making them

a key player to replace current

lamp types or internal or external

lighting, so giving an extra

contribution to reducing energy 

consumption.

In street lighting applications,

where higher eciency, longer

lietime and reduced maintenance

are vital or reducing costs, theadoption o LEDs is increasing.

ST’s new generation o ofine

converters eatures a two-stage

topology to meet these needs.

Based on a ront-end PFC and

an LCC resonant converter,

this innovative architecture

eliminates the need or electrolytic

capacitors.

Key features

Q Extended European Input mains

range: 177 to 277 V  AC

Q Universal input mains range:

85 to 305 V  AC

Q Output voltage: 48 V at 2.7 A 

Q Long lietime − electrolytic

capacitors are not used

Q Overall eiciency at ull load:

better than 93%

Q No heatsinks needed

Q Saety: double insulation,

according to EN60950, SELV 

Q Mains harmonics: according to

EN61000-3-2 Class-C

Q EMI: according to

EN55022-Class-B

Q Dimensions: 75 x 135 mm, 30 mm

components maximum height

Q PCB: single side, 35 μm, FR-4,

mixed PTH/SMT 

Q RoHS and halogen-ree compliant

Key components

Q L6562AT: transition mode

PFC controller with extended

temperature speciication

Q L6599AT: high-voltage resonant

controller with extended

temperature speciication

Q STB21NM60N, STB8NM60N:

MDmesh™ power MOSFETs

Q STTH3L06U: Turbo2 ultraast

high-voltage rectiier

Q STPS10150CG: high-voltage power

Schottky rectiier

Q SEA05: advanced constant-voltage

constant-current controller

Target application

Q SMPS or LED street lighting

48 V, 130 W high-efciency SMPSor LED street lighting

 A two-stage topology provides very high efciency,

Extended input mains range operation and long-term reliability

www.st.com/powermanagement

STMicroelectronics

7/27/2019 48 v, 130 W High-efficiency SMPS for LED Street Lighting-flsmpsled

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© STMicroelectronics - October 2011 - Printed in United Kingdom - All rights reservedThe STMicroelectronics corporate logo is a registered trademark o the STMicroelectronics group o companies

 All other names are the property o their respective owners

Order code: FLSMPSLED1011

 The PFC stage, working in transition mode, acts as pre-regulator and powers

the resonant stage with an output voltage o 450 V. The PFC power topology is a

conventional boost converter, connected to the output o the rectifer bridge.

 This design presents a very high efciency, extended input mains range operation

and long term reliability. The electrolytic capacitors are replaced by flm capacitors.

Component derating has also been careully applied during the design phase,

decreasing component stress.Moreover, the use o L6562AT and L6599AT minimizes the number o external

components, reducing the overall system cost and increasing the MTBF (mean

time between ailures).

 The high efciency achieved means that the PFC stage only requires a small

heatsink, while the other power components are surace mounted, like most o the

passive components, thus decreasing the assembly cost.

 The board also has protection eatures that are activated in case o overload or

short circuit, open loop or each stage or input overvoltage. All the protection

eatures have an auto-restart unction − they do not need to be deactivated

manually ater intervention.

Evaluation boards

Order codes Description Application note

EVL130W-SL-EU 130 W SMPS or LED street lighting applications, extended European input mains range: 177 to 277 V AC

 AN3105

EVL130W-STRLIG 130 W SMPS or LED street lighting applications universal Input mains range: 85 to 305 V AC

 AN3106

EVL6562A-LED Constant-current inverse buck LED driver using L6562A, transition mode PFC AN2983

 AC mains

EVL130W-SL-EU or

EVL130W-STRLIG

EVL6562A-LED

48 V/130 W

R LED

DIMMING DIMMING

R LED

DIMMING

R LED

EVL6562A-LED EVL6562A-LED

PFCL6562AT

LLCL6599AT

Inverse buck CCregulator

Inverse buck CCregulator

Inverse buck CCregulator