EVAL6599-200W STMicroelectronics, EVAL6599-200W Datasheet - Page 14

• Manufacturer Part Number: EVAL6599-200W
• Description: EVAL BOARD FOR L6599
• Manufacturer: STMicroelectronics
• Type: Power Factor Correctionr

Specifications of EVAL6599-200W

• Main Purpose: AC/DC, Primary Side and PFC
• Outputs And Type: 4, Isolated
• Power - Output: 200W
• Voltage - Output: 24V, 12V, 5V, 3.3V
• Current - Output: 6A, 5A, 1A, 700mA
• Voltage - Input: 90 ~ 264VAC
• Regulator Topology: Resonant
• Frequency - Switching: 95kHz
• Board Type: Fully Populated
• Utilized Ic / Part: L6563, L6599
• Input Voltage: 90 V to 264 V
• Output Voltage: 3.3 V to 24 V
• Dimensions: 132 mm x 265 mm
• Product: Power Management Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: L6599
• Other names: 497-5496

Electrical test results
2.3
14/35
Figure 12. Load transition (0 - 100%) on +24 V
Ch1: +24 V output voltage
Ch2: +12 V output current
Ch3: PFC output voltage (400 V)
Ch4: + 24 V output current
Dynamic load +24 V @0-6 A - 12 V @ max load (5 A)
Thus, it is clear that the proposed architecture is really suitable for power supplies operating
with strong load variation without any problem related to the load regulation.
Stand-by and no load power consumption
The board is specifically designed for light load and zero load operation, as during Stand-by
or Power-off operation, when no power is requested from the +24 V and +12 V outputs.
Though the resonant converter can operate down to zero load, some tricks are required to
keep very low the input power drawn from the mains when the system is in this load
condition. Thus, when entering this power management mode, the ST-BY signal needs to be
set high (by the microcontroller of the system). This forces the PFC pre-regulator and the
resonant stage to switch off (because the supply voltage of the two control ICs is no longer
present
the microprocessor circuitry.
Table 3
conditions at 115 and 230 V
These tables show that at no load the input power is lower than 0.5 W.
output voltage
and
(Figure
Table 4
4) and only the auxiliary flyback converter continues working just to supply
show the measurements of the input power in several light load
ac
.
Figure 13. Load transition (0 - 100%) on +12 V
Ch1: +24 V output voltage
Ch2: +12 V output current
Ch3: PFC output voltage (400 V)
Ch4: + 12 V output current
Dynamic load +12 V @0-5 A - 24 V @ max load (6 A)
output voltage
AN2393