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NCP1608 Datasheet(PDF) 23 Page - ON Semiconductor

Part # NCP1608
Description  Critical Conduction Mode PFC Controller Utilizing a Transconductance Error Amplifier
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

NCP1608 Datasheet(HTML) 23 Page - ON Semiconductor

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NCP1608
http://onsemi.com
23
BOOST DESIGN EQUATIONS Components are identified in Figure 1 (Continued)
Output Voltage UVP
Detection
Vout(UVP) + VUVP @ Rout1 @
Rout2 ) RFB
Rout2 @ RFB
) 1
VUVP is shown in the specification
table.
Inductor rms Current
IL(RMS) +
2 @ Pout
3 @ Vac @ h
Output Diode rms
Current
ID(RMS) + 43 @
2 @ 2
p @
Pout
h @ Vac @ Vout
MOSFET rms Current
IM(RMS) + 2
3
@
Pout
h @ Vac @
1 *
2 @ 8 @ Vac
3 @ p @ Vout
Current Sense Resistor
Rsense +
VILIM
IL(peak)
PR
sense +
IM(RMS)2 @ Rsense
VILIM is shown in the specification
table.
Type 1 Compensation
CCOMP +
gm
2 @ p @ fCROSS
Where fCROSS is the crossover fre-
quency and is typically less than
20 Hz. gm is shown in the specifica-
tion table.


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