NCP1607BDR2G ON Semiconductor, NCP1607BDR2G Datasheet - Page 21

• Manufacturer Part Number: NCP1607BDR2G
• Description: IC PFC CONTROLLER CRM 8SOIC
• Manufacturer: ON Semiconductor

Specifications of NCP1607BDR2G

• Mode: Critical Conduction (CRM)
• Current - Startup: 23.5µA
• Voltage - Supply: 9.5 V ~ 20 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Switching Frequency: 70 KHz
• Maximum Power Dissipation: 450 mW
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Frequency - Switching: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

BOOST DESIGN EQUATIONS
RMS Input Current
Maximum Inductor Peak
Current
Inductor Value
Maximum On Time
Off Time
Frequency
Pin 3 Capacitor
Boost Turns to ZCD Turns
Ratio
Resistor from ZCD wind-
ing to the ZCD pin (pin 5)
Boost Output Voltage
Maximum V
prior to OVP activation and
the necessary R
R
Minimum output voltage
necessary to exit under-
voltage protection (UVP)
Bulk Cap Ripple
Inductor RMS Current
Boost Diode RMS Current
OUT2
.
OUT
voltage
OUT1
and
Components are identified in Figure 1
f
SW
I
D(RMS)MAX
V
+
ripple(pk−pk)
V
L v
OUT(UVP)
2 @ L @ P
V
N
V
OUT(OVP)
Vac
R
Ct w
B
OUT
R
R
ZCD
: N
V
I
OUT2
t
R
I
OUT1
R
L(RMS)
+ 4
on(MAX)
pk(MAX)
OUT
2
t
Iac +
off
EQ
+ V
EQ
ZCD
@ h
2 @ Vac
w
2 @ P
3
OUT
+ V
+
+
+
+
@ Vac @ I
+ R
@
h @ Vac
+
+ V
I
v
REF
CL(NEG)
C
http://onsemi.com
+
Vac@ sin(q) @ 2
@ 1 *
R
R
R
h @ Vac
+
+
OUT
R
UVP
BULK
V
P
V
EQ
FB
2 @ 2
OUT2
OUT1
2
OUT2
OUT(OVP)
V
OUT
@
OUT
OUT
3 @ Vac
2 @ 2 @ P
2 @ L @ P
OUT
Vac
@
p
h @ Vac
R
* R
@
2 @ P
@ L @ I
) R
t
2
h @ Vac
on
@ 2 @ p @ f
pk(MAX)
OUT1
R
@ V
@ (N
V
) I
) R
@
* Vac
HL
@ R
21
OUT
I
V
Vac @ | sin q | @ 2
OUT1
@
OVP
2
V
EQ
R
FB
P
ZCDH
OUT
h @ Vac
* 1
CTMAX
@ 2
OUT
LL
CHARGE
B
EQ
FB
OVP
OUT
R
* Vac
) R
* V
FB
LL
OUT
: N
EQ
LL
OUT
V
) R
@ h
@ f
V
2
HL
REF
* V
@ R
line
OUT
ZCD
OUT
SW(min)
EQ
P
@ 2
EQ
OUT
@ V
OUT1
LL
)
REF
@ V
OUT
OUT
h (the efficiency of only the Boost
PFC stage) is generally in the range
of 90 − 95%
Where Vac
put voltage. I
lowest line voltage.
f
switching frequency. The maximum L
must be calculated at low line and
high line.
The maximum on time occurs at the
lowest line voltage and maximum
output power.
The off time is greatest at the peak of
the ac line voltage and approaches
zero at the ac line zero crossings.
Theta (q) represents the angle of the
ac line voltage.
I
the NCP1607 specification table.
Where Vac
input voltage. The turns ratio must be
low enough so as to trigger the ZCD
comparators at high line.
R
the shutdown comparator is not inad-
vertently activated.
I
cification table.
V
cification table.
Use f
universal lines. The ripple must not
exceed the OVP level for V
SW(MIN)
CHARGE
OVP
UVP
ZCD
is given in the NCP1607 spe-
line
must be large enough so that
is given in the NCP1607 spe-
is the minimum desired
= 47 Hz for worst case at
and V
LL
HL
pk(MAX)
is the minimum line in-
is the maximum line
CTMAX
occurs at the
are given in
OUT
.