EVL170W-FTV STMicroelectronics, EVL170W-FTV Datasheet - Page 16

• Manufacturer Part Number: EVL170W-FTV
• Description: DEMO BOARD VIPER27 L6599A L6564
• Manufacturer: STMicroelectronics
• Series: VIPER™r

Specifications of EVL170W-FTV

• Main Purpose: Power Supply with PFC
• Outputs And Type: 2, Isolated
• Power - Output: 170W
• Voltage - Output: 24V, 12V, 5V
• Current - Output: 6A, 2A, 2A
• Voltage - Input: 90 ~ 264VAC
• Regulator Topology: Flyback
• Frequency - Switching: 130kHz
• Board Type: Fully Populated
• Utilized Ic / Part: Viper27LN, L6564, L6599A
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-11254

Functional check
16/47
Figure 23. Standby supply OVP at 115 Vac -
Figure 25. Standby supply output short-circuit
CH1: DRAIN (pin #8)
CH3: CONT (pin #3)
CH1: DRAIN (pin #8)
CH3: V
DD
(pin #2)
and switching starts again. This protection and restart sequence lasts as long as the OVP
condition is removed. It is important to highlight that the Viper27LN OVP protection, thanks
to the internal logic, ensures a stable OVP intervention point, independent of the output
load, even if the voltage sensing is done on auxiliary winding at primary side. It can be
noted, by comparing
different loads and input voltage conditions, that the maximum output voltage peak has a
negligible variation.
Figure 24
event on the standby supply output has been captured. In this situation the Viper27LN
enters a safe hiccup mode, providing protection against overheating of the auxiliary
converter power components.
60 Hz - PFC on - 1 A
at 230 Vac - 50 Hz, full load
shows, in detail, the OVP intervention at 115 Vac. In
CH2: +5 V standby
CH2: +5 V standby
CH4: FB (pin #4)
CH4: FB (pin #4)
Figure 21
Doc ID 18376 Rev 1
to
Figure 23
Figure 24. Standby supply OVP at 115 Vac -
Figure 26. Standby supply output short-circuit
CH1: DRAIN (pin #8)
CH3: CONT (pin #3)
CH1: DRAIN (pin #8)
CH3: V
which report some OVP intervention with
DD
(pin #2)
60 Hz - PFC on - 1 A
at 230 Vac - 50 Hz, full load - detail
Figure 25
CH2: 5 V standby
CH2: 5 V standby
CH4: FB (pin #4)
CH4: FB (pin #4)
a short-circuit
AN3329