EVL250W-ATX80PL STMicroelectronics, EVL250W-ATX80PL Datasheet - Page 5

• Manufacturer Part Number: EVL250W-ATX80PL
• Description: BOARD DEMO SMPS L6591/L6563S
• Manufacturer: STMicroelectronics
• Series: VIPer™ plusr

Specifications of EVL250W-ATX80PL

• Main Purpose: Power Supply, ATX
• Outputs And Type: 3, Isolated
• Power - Output: 250W
• Voltage - Output: 12V, 5V, 3.3V
• Current - Output: 13.5A, 12A, 8A
• Voltage - Input: 88 ~ 264VAC
• Regulator Topology: Flyback
• Frequency - Switching: 80kHz
• Board Type: Fully Populated
• Utilized Ic / Part: L6563S, L6591, L6727, VIPer27H
• Input Voltage: 88 VAC to 264 VAC
• Output Voltage: 3.3 V, 5 V, 12 V
• Maximum Operating Temperature: + 60 C
• Operating Supply Voltage: 80 VAC to 264 VAC
• Output Power: 250 W
• Product: Power Management Development Tools
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: L6563S PFC controller
• Other names: 497-10596

AN3203
1
Main characteristics and circuit description
Here are the main characteristics of the power supply:
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The EVL250W-ATX80PL demonstration board is made up of four main blocks, the
schematics are shown in
The front-end PFC stage is realized using a boost topology working in line modulated fixed
off time (LM-FOT) mode, described in STMicroelectronics’ application notes, AN1792;
Design of Fixed-Off-Time controlled PFC pre-regulators with the L6562 and AN3142;
Solution for designing a 400 W Fixed-Off-Time controlled PFC preregulator with the L6563S
and L6563H. The LM-FOT operation offers the advantage of having CCM operation (with
lower rms current with respect to TM mode) without the need to use a complex and
expensive controller. Therefore, it is possible to use the simple L6563S, enhanced TM PFC
controller, which integrates all the functions and protection, needed to control the stage, and
an interface with the downstream DC-DC converter.
The power stage of the PFC is realized with inductor L4, MOSFET Q1 and Q2, diode D3,
and capacitor C1. The LM-FOT operation is obtained with components D6, R15, C10, R14,
C9, R13, and Q3.
The PFC delivers a stable high voltage bus (+400 V nominal) to the downstream converters
(AHB and flyback) and provides for the reduction of the current harmonics drawn from the
mains, in order to meet the requirements of the European EN61000-3-2 norm and the
Japanese JEITA-MITI norm.
The second stage is an asymmetrical half bridge converter, driven by the L6591, a
STMicroelectronics controller dedicated to this topology. This IC integrates all the functions
Input mains range:
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Outputs:
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Standby consumption: < 0.2 W
Protection:
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PCB type and size:
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Safety: according to EN60950
EMI: according to EN55022 - class B
Vin: 88 ~ 264 Vrms
f: 45 ~ 66 Hz
+12 Vdc ± 2 % - 13.5 A
+5 Vdc ± 2 % - 12 A
+3.3 Vdc ± 2 % - 8 A
+5 V_SB ± 2 % - 2 A
Short-circuit
Overload
Output overvoltage
Brownout
FR4
Double side CU 70 µm
148 x 120 mm
Figure
Doc ID 17402 Rev 1
2, 3, 4, and 5.
Main characteristics and circuit description
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