EVL6564-100W STMicroelectronics, EVL6564-100W Datasheet - Page 4

• Manufacturer Part Number: EVL6564-100W
• Description: BOARD EVAL PFC FOR L6564D
• Manufacturer: STMicroelectronics
• Type: Power Factor Correctionr

Specifications of EVL6564-100W

• Main Purpose: AC/DC, Primary Side
• Outputs And Type: 1, Non-Isolated
• Power - Output: 100W
• Voltage - Output: 400V
• Voltage - Input: 90 ~ 265VAC
• Regulator Topology: Boost
• Frequency - Switching: 40kHz
• Board Type: Fully Populated
• Utilized Ic / Part: L6564
• Input Voltage: 90 V to 265 V
• Output Voltage: 400 V
• Dimensions: 90 mm x 83 mm
• Product: Power Management Modules
• Lead Free Status / RoHS Status: Lead free by exemption / RoHS compliant by exemption
• Current - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: L6564
• Other names: 497-10164

Main characteristics and circuit description
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Main characteristics and circuit description
The main characteristics of the SMPS are:
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This demonstration board implements a 100 W power factor correction (PFC) pre-regulator,
continuous power, on a regulated 400 V rail from a wide range mains voltage and provides
for the reduction of the mains harmonics, which allows meeting the European EN61000-3-2
or the Japanese JEITA-MITI standard. The regulated output voltage is typically the input for
the cascaded isolated DC-DC converter that provides the output rails required by the load.
The board is designed to allow full-load operation in still air.
The power stage of the PFC is a conventional boost converter, connected to the output of
the rectifier bridge D1. It is completed by the coil L2, the diode D3 and the capacitor C6. The
boost switch is represented by the power MOSFET Q1. The NTC R1 limits the inrush
current at switch-on. It is connected to the DC rail, in series to the output electrolytic
capacitor, in order to improve the efficiency during low line operation because the RMS
current flowing into the output stage is lower than current flowing into the input stage at the
same input voltage, thus increasing efficiency. The board is equipped with an input EMI filter
necessary to filter the commutation noise coming from the boost stage.
At startup the L6564 is powered by the Vcc capacitor C11 that is charged via the resistors
R7 and R16. Then the L2 secondary winding and the charge pump circuit (C7, R4, D4 and
D5) generate the Vcc voltage, powering the L6564 during normal operation. The L2
secondary winding is also connected to the L6564 pin #7 (ZCD) through the resistor R5. Its
purpose is to supply the information that L2 has demagnetized, needed by the internal logic
for triggering a new switching cycle.
The divider R9, R12, R17 and R19 provides the L6564 multiplier with the information of the
instantaneous mains voltage that is used to modulate the peak current of the boost.
The resistors R2, R8, R10 with R13 and R14 are dedicated to sense the output voltage and
send to the L6564 the feedback information necessary to regulate the output voltage. The
components C9, R18 and C8 constitute the error amplifier compensation network necessary
to keep the required loop stability.
The peak current is sensed by resistors R25 and R26 in series to the MOSFET and the
signal is fed into pin #4 (CS) of the L6564. On pin #4 (CS) there is also a small filter
composed of R24 and C15.
The capacitor C13 and the parallel resistor R32 complete an internal peak-holding circuit
that obtains information on the RMS mains voltage. The voltage signal at pin #5, which is a
Line voltage range: 90 to 265 Vac
Minimum line frequency (f
Regulated output voltage: 400 V
Rated output power: 100 W
Maximum 2 f
Hold-up time: 10 ms (V
Minimum switching frequency: 40 kHz
Minimum estimated efficiency 92% (at Vin = 90 Vac, Pout = 100 W)
Maximum ambient temperature: 50 °C
PCB type and size: Single-side, 35 µm, CEM-1, 90 x 83 mm
L
output voltage ripple: 20 V peak-to-peak
DROP
Doc ID 16106 Rev 1
L
): 47 Hz
after hold-up time is 300 V)
AN3022