EVL185W-LEDTV STMicroelectronics, EVL185W-LEDTV Datasheet - Page 21

• 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 33. 12 V and 24 V rectifier PIV
Figure 35. Startup at full load and 115 Vac by
CH1: D4-A anode
CH1: HB voltage
CH3: D9-A anode
CH3: +12 V o/p voltage
Figure 35
of the two stages: the PFC starts and its output voltage increases from the mains rectified
voltage to its nominal value. In the meantime, the L6599A is kept inactive by the LINE pin
(#7) until the PFC voltage reaches the set threshold. Then, the resonant starts operating
and the output voltage reaches the nominal level. Output voltage achieves the nominal value
150 ms after power-on signal.
Figure 36
L6599A are no longer supplied. Output voltage drops to 0 V 40 ms after power off signal.
Figure 37
has some oscillations due to the charging of the resonant elements. Anyhow, current zero-
crossing always lags the HB commutations and consequently the MOSFETs are soft-
switched.
on/off signal
shows the waveforms during startup at 115 Vac and full load. Note the sequence
shows the waveforms at shutdown. Opening the on/off signal, both L6564 and
shows details of waveforms at startup. Note that the resonant current at turn-on
CH2: D4-B anode
CH4: D9-B anode
CH2: PFC drain
CH4: on/off
Doc ID 18449 Rev 1
Figure 34. 130 V rectifier PIV
Figure 36. Shut down at full load and 115 Vac
CH1: D27 rev. voltage
CH3: D26 rev. voltage
CH1: HB voltage
CH3: +12 V o/p voltage
by on/off signal
CH2: D25 rev. voltage
CH4: D24 rev. voltage
CH2: PFC drain
CH4: on/off
Functional check
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