EVL185W-LEDTV STMicroelectronics, EVL185W-LEDTV Datasheet - Page 19

• Manufacturer Part Number: EVL185W-LEDTV
• Description: DEMO BOARD VIPER27L L6564 L6599A
• Manufacturer: STMicroelectronics
• Series: VIPER™r

Specifications of EVL185W-LEDTV

• Design Resources: EVL185W-LED BOM EVL185W-LED Schematic
• Main Purpose: Power Supply with PFC
• Outputs And Type: 4, Isolated
• Power - Output: 185W
• Voltage - Output: 130V, 24V, 12V, 5V
• Current - Output: 620mA,2A, 4A, 2A
• Voltage - Input: 90 ~ 264VAC
• Regulator Topology: -
• Frequency - Switching: -
• Board Type: Fully Populated
• Utilized Ic / Part: Viper27L, L6564, L6599A
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-11255

AN3339
Figure 27. PFC Vds and inductor current
Figure 29. L6564 signals (1) at 115 Vac - 60 Hz,
CH1: Q1 drain voltage
CH1: COMP (pin #9)
CH3: CS (pin #4)
CH3: MULT (pin #3)
Figure 29
second input to the multiplier for 1/V2 function. The voltage at this pin, a DC level equal to
the peak voltage on the MULT pin (#3), compensates the control loop gain line-dependence.
In
MOSFET turn-on.
at 230 Vac - 50 Hz, full load
full load
Figure
30, it can be observed that a negative-going edge on the ZCD pin triggers the
and
CH4: L1 inductor current
CH4: CS (pin #4)
CH2: MULT (pin #3)
CH2: VFF (pin #7)
30
show the PFC control signal; in particular the VFF signal which is the
Doc ID 18449 Rev 1
Figure 28. PFC Vds and inductor current
Figure 30. L6564 signals (2) at 115 Vac - 60 Hz,
CH1: Q1 drain voltage
CH1: GD (pin #9)
CH3: CS (pin #4)
CH3: MULT (pin #3)
at 230 Vac, full load - detail
full load
CH4: L1 inductor current
CH4: CS (pin #4)
CH2: MULT (pin #3)
CH2: ZCD (pin #7)
Functional check
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