EVL130W-STRLIG STMicroelectronics, EVL130W-STRLIG Datasheet - Page 6

• Manufacturer Part Number: EVL130W-STRLIG
• Description: BOARD EVAL L6562AT L6599AT
• Manufacturer: STMicroelectronics

Specifications of EVL130W-STRLIG

• Current - Output / Channel: 2.7A
• Outputs And Type: 1, Isolated
• Voltage - Output: 48V
• Features: EN55022 class B compliant
• Voltage - Input: 85 ~ 305 V
• Utilized Ic / Part: L6562AT, L6599AT
• Description/function: SMPS for LED Street Lighting Applications
• Data Bus Width: 4 bit
• Maximum Clock Frequency: 30 MHz
• Maximum Power Dissipation: 130 W
• Operating Supply Voltage: 85 V to 305 V
• Operating Voltage: 48 V
• Product: Display Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: L6562AT, L6599AT
• Other names: 497-10541

Main characteristics and circuit description
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Main characteristics and circuit description
The main features of the SMPS are listed here below:
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Power Factor corrector
The PFC stage, working in transition mode, acts as a preregulator and powers the resonant
stage with the output voltage of 450 V. The PFC power topology is a conventional boost
converter, connected to the output of the rectifier bridge D3. It is completed by the coil L1,
manufactured by MAGNETICA, the diode D2 and the capacitors C5, C6 and C7 in parallel.
The PFC output capacitors are film type, 5 µF - 800 V manufactured by EPCOS. Using film
capacitors to replace the typical electrolytic capacitors allows increasing considerably the
MTBF of the board.
The boost switch is represented by the power MOSFET Q2. The board is equipped with an
input EMI filter necessary to filter the commutation noise coming from the boost stage. The
PFC implements the controller L6562AT, a small and inexpensive controller that is
guaranteed for operation over a wide temperature range.
At startup, the L6562AT is supplied by the startup resistors R5, R8, R13 charging the
capacitor C13. Once the PFC begins switching, a charge pump connected to the auxiliary
winding of the PFC inductor L1 supplies both PFC and resonant controllers via a small
linear regulator implemented by Q1. Once both stages have been activated, the controllers
are supplied also by the auxiliary winding of the resonant transformer, assuring correct
supply voltage during operation of all load conditions. The L1 auxiliary winding is also
connected to the L6562AT pin #5 (ZCD) through the resistor R18. Its purpose is to provide
the information that L1 has demagnetized, needed by the internal logic for triggering a new
switching cycle. The PFC boost peak current is sensed by resistors R33 and R34 in series
to the MOSFET source. The signal is fed into pin #4 (CS) of the L6562AT, via the filter R27
and C16.
The divider R7, R12, R14 and R22 provides the L6562AT multiplier with the information of
the instantaneous mains voltage that is used to modulate the peak current of the boost.
The resistors R2, R6, R9 with R15 and R16 are dedicated to sense the output voltage and
feed to the L6562AT the feedback information necessary to maintain the output voltage
regulated. The components C11, R20 and C12 constitute the error amplifier compensation
network necessary to keep the required loop stability.
Extended input mains range: 85 ÷ 305 V
Output voltage: 48 V at 2.7 A
Long-life, electrolytic capacitors are not used
Mains harmonics: acc. to EN61000-3-2 Class-C
Efficiency at full load: better than 90% at 115 V
EMI: according to EN55022-Class-B, EN55015
Safety: double insulation, according to EN60950, SELV
Dimensions: 75 x 135 mm, 30 mm components maximum height
PCB: single side, 35 µm, FR-4, mixed PTH/SMT
Doc ID 16775 Rev 1
AC
- frequency 45 ÷ 55 Hz
AC
AN3106