NCP1653ADR2G ON Semiconductor, NCP1653ADR2G Datasheet - Page 11

• Manufacturer Part Number: NCP1653ADR2G
• Description: IC PFC CONTROLLER CCM 8SOIC
• Manufacturer: ON Semiconductor

Specifications of NCP1653ADR2G

• Mode: Continuous Conduction (CCM)
• Frequency - Switching: 67kHz
• Voltage - Supply: 8.75 V ~ 18 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Switching Frequency: 67 KHz
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Startup: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: NCP1653ADR2G; NCP1653ADR2GOSTR

stands for the RMS. I
bandwidth. Multiplier resistor R
connected to the multiplier voltage V
constant. R
capability and hence its value affects the NCP1653 to
operate in either “follower boost mode” or “ constant
output voltage mode”.
as described in (eq.10). I
component (which depends on di/dt or inductor L) and
low−frequency component (which is I
comes from the PFC output voltage V
varying signal. The bandwidth of I
additionally limited by inserting an external capacitor
C
Figure 30. It is recommended to limit f
bandwidth of V
achieve power factor correction purpose. Typical value of
C
re−formulated in (eq.12).
high−frequency component of the multiplier voltage V
The high−frequency component is basically coming from
the inductor current I
capacitor C
component of inductor current I
C
I
Z in +
L
control
control
filter
Sense current I
Control current I
From (eq.7)−(eq.10), the input impedance Z
The multiplier capacitor C
becomes I
V
Regulation Block
96% I
reg
match with each other in terms of filtering capability,
2 R S R vac I control V ref
is between 0.1 mF and 0.33 mF.
to the control voltage V
Figure 30. V
ref
R M R CS V ac V out
Z in +
M
I vac +
C control u
filter
L−50
I
ref
directly limits the maximum input power
control
S
. Input impedance Z
2 R S R vac I control V ref I L−50
I
similarly removes the high−frequency
FB
is proportional to the inductor current I
control
R vac ) 12 kW
2 V ac * 4 V
control
R M R CS V ac V out I L
(or I
vac
I S +
V control
L
2 p 300 kW f control
300 k
. On the other hand, the filter
L
is a roughly constant current that
is a constant in the 50 or 60 Hz
control
consists of the high−frequency
R CS
Low−Pass Filtering
R S
M
), below 20 Hz typically to
L
2
whenI L + I L−50
1
M
. If the capacitors C
I L
is the one to filter the
C control
control
[
is the external resistor
M
in
R vac
L−50
I
pin (Pin 5). It is also
out
control
V ac
is roughly constant
control
pin (Pin 2) in
control
that is a slowly
).
, that is the
=
V control
can be
(eq.10)
(eq.12)
(eq.11)
R 1
http://onsemi.com
(eq.9)
M
in
and
M
is
L
.
11
over the bandwidth of 50 or 60 Hz and power factor is
corrected.
front−ended EMI filter improves the filtering performance
of capacitor C
is generally with a larger value comparing to the filter
capacitor C
(eq.13) when the circuit efficiency η is obtained or
assumed. The variable V
voltage.
Follower Boost
I
a constant load or power demand the output voltage V
the converter is proportional to the RMS input voltage V
means the output voltage V
input voltage V
output voltage V
demand becomes higher. It is illustrated in Figure 31.
Follower Boost Benefits
the output voltage V
V
of the step−up characteristics of boost converter, the output
voltage V
V
control
P out + hP in + h
ac
in
Practically, the differential−mode inductance in the
Input and output power (P
The NCP1653 operates in follower boost mode when
The follower boost circuit offers an opportunity to reduce
P in +
even though V
is lower or the power demand P
V
V in
P out
out
T
T
is constant. If I
Figure 31. Follower Boost Characteristics
V ac 2
(Traditional boost)
out
I control V ac
I control V ac
Z in
filter
will always be higher than the input voltage
V out
V out
filter
+
.
ac
out
2 R S R vac I control V ref V ac
out
. Therefore, the multiplier capacitor C
becomes lower. On the other hand, the
2 R S R vac I control V ref V ac
becomes lower when the load or power
is reduced in follower boost operation.
out
control
V
out
whenever the RMS input voltage
R M R CS V out
R M R CS V out
out
(Follower boost)
ac
is constant based on (eq.13), for
becomes lower when the RMS
stands for the RMS input
in
and P
out
out
is higher. Because
) are derived in
(eq.13a)
(eq.13b)
time
time
out
ac
. It
of
M