NCP1605FORWGEVB ON Semiconductor, NCP1605FORWGEVB Datasheet - Page 16

• Manufacturer Part Number: NCP1605FORWGEVB
• Description: EVAL BOARD FOR NCP1605FORWG
• Manufacturer: ON Semiconductor

Specifications of NCP1605FORWGEVB

• Design Resources: NCP1605FORWGEVB BOM NCP1605FORWGEVB Gerber Files NCP1605 EVB Schematic
• Main Purpose: AC/DC, Primary and Secondary Side with PFC
• Outputs And Type: 1, Isolated
• Voltage - Output: 19V
• Current - Output: 8A
• Voltage - Input: 90 ~ 265VAC
• Regulator Topology: Forward Converter
• Frequency - Switching: 133kHz
• Board Type: Fully Populated
• Utilized Ic / Part: NCP1217, NCP1605
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: NCP1605FORWG
• Other names: NCP1605FORWGEVBOS

Standby Performance
reduce the losses (the PFC stage remaining on in stand-by
*These values were obtained by measuring Wh during 2 mn with a power meter YOKOGAWA WT210 at I
80 mW are due to the two V
feedback, another one for OVP). We could then improve
these results if only one sensing network was used and/or if
the leakage current of these sensing networks was lowered
by using higher impedance resistors dividers.
drops below 0.5 A.
Table 3.
In light load conditions, the circuit enters skip mode to
One can note that among the measured losses, about
The PFC stage enters skip mode when the load current
(No Load)
P
IN, AVG
V
ac
BULK
V
sensing networks (one for
IN
(100 V/div)
Figure 16. Abrupt Load Decrease at 120 Vrms
I
OUT
(mW)
(V)
(2 A/div)
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16
to keep on providing the 2-switch forward with its nominal
input voltage).
mode at low and high line. We can see that as explained in
the data sheet, the NCP1605 skips operation until V
reaches 95.5% of its nominal level and then recovers
operation. Practically, V
and 360 V.
The following figures show the V
19 V (AC Component - 1 V/div)
425
90
V
BULK
360 V
(100 V/div)
2 A
BULK
OUT
oscillates between about 380
= 0.
BULK
voltage in standby
110
450
BULK