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NCP1608
Application Information
ON Semiconductor provides an electronic design tool, a
demonstration board, and an application note to facilitate
the design of the NCP1608 and reduce development cycle
time. All the tools can be downloaded or ordered at
www.onsemi.com .
Rstart1
The electronic design tool allows the user to easily
determine most of the system parameters of a boost
pre ? converter. The demonstration board is a boost
pre ? converter that delivers 100 W at 400 V. The circuit
schematic is shown in Figure 47. The pre ? converter design
is described in Application Note AND8396/D.
Rstart2
Lboost
Dboost
NTC
J3
t °
F1
L1
Bridge
Rctup1
R1
C3
Daux
D1
CVcc
+
Dvcc
Ro1a
J2
C1
L2
C2
Rctup2
Rzcd
Ro1b
Vcc
FB
Control DRV
GND
Ct
ZCD 5
CS
Ccs
Cin
Rcomp1
Ccomp
Ccomp1
J1
Rct
Ct2 Ct1
1 8
2 7
3 6
4
U1
NCP1608
Rcs
Czcd
CVcc2 Ddrv
Rdrv
Rs3 Rs2 Rs1
Q1
Rout2a
Rout2b
Cbulk +
Figure 47. Application Schematic
http://onsemi.com
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