EVAL6599-90W STMicroelectronics, EVAL6599-90W Datasheet - Page 8

• Manufacturer Part Number: EVAL6599-90W
• Description: EVAL BOARD FOR L6599
• Manufacturer: STMicroelectronics
• Type: Power Factor Correctionr

Specifications of EVAL6599-90W

• Main Purpose: AC/DC, Primary Side and PFC
• Outputs And Type: 1, Isolated
• Power - Output: 90W
• Voltage - Output: 19V
• Current - Output: 4.7A
• Voltage - Input: 90 ~ 264VAC
• Regulator Topology: Resonant
• Frequency - Switching: 90kHz
• Board Type: Fully Populated
• Utilized Ic / Part: L6563, L6599
• Input Voltage: 90 V to 264 V
• Output Voltage: 19 V
• Dimensions: 78 mm x 174 mm
• Product: Power Management Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: L6599
• Other names: 497-5497

Test results
2.2
8/29
Figure 2.
The global efficiency at full load has been measured with good results even at the limits of
the input voltage range:
Vin = 90Vac - full load
Pin = 100.5 W
Efficiency = 88.9%
Resonant stage operating waveforms
Figure 3.
In
load. The CH2 waveform is the oscillator signal at pin #3 of the L6599, while the CH3
waveform is the PFC output voltage, powering the resonant stage. The CH1 trace is the half
bridge waveform, driving the resonant circuit. In the picture it is not obvious, but the
switching frequency is normally slightly modulated following the PFC 100 Hz ripple that is
rejected by the resonant control circuitry. The switching frequency has been chosen around
90 kHz, in order to have a good trade off between transformer losses and its dimensions.
Figure 3
CH1: L6599 - V
CH2: L6599 - V
are reported some waveforms during steady state operation of the circuit at full
Efficiency vs. Pout
Resonant circuit primary side waveforms
PIN14
PIN3
94.00
92.00
90.00
88.00
86.00
84.00
82.00
80.00
78.00
76.00
74.00
(CF)
(HB voltage)
89
71
Efficiency vs Pout
51
Eff. @115Vac
Eff. @230Vac
O/P Power
Vin = 264 Vac - Full load
Pin = 96.3 W
Efficiency = 92.6%
32
CH3: +400 V PFC Output voltage
CH4: T1 primary winding current
19
10
5
AN2321