NCP1605FORWGEVB ON Semiconductor, NCP1605FORWGEVB Datasheet - Page 15

• 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

Dynamic Performance
2 A to 8 A (slope 2 A/ms) at 120 Vrms.
response enhancer, the bulk voltage stays largely above
on V
stage takes benefit from the fast response of the 2-switch
forward feedback voltage (FB). More specifically, an abrupt
load decrease results in a rapid drop of the FB voltage. If this
signal that controls the NCP1605 skip mode activity drops
The following plots were obtained by varying I
One can note that thanks to the NCP1605 dynamic
Another interesting behavior is the absence of overshoot
BULK
when the load current suddenly drops. The PFC
2 A
V
IN
(100 V/div)
Figure 15.
I
I
OUT
OUT
(2 A/div)
(2 A/div)
Abrupt Load Increase at 120 Vrms
OUT
http://onsemi.com
from
AND8292
15
350 V while the load current suddenly increases from 25%
to full load (see Figure 16).
to a level that is low enough, the PFC stage skips cycles until
the bulk voltage reaches 95.5% of its nominal value. This
skipping period (see the V
down to 360 V in Figure 11) avoids any overshoot and helps
provide the 2-switch forward with a narrow input voltage.
19 V (AC Component - 1 V/div)
V
V
BULK
BULK
350 V
(100 V/div)
(100 V/div)
8 A
BULK
decay period from 381 V