NCP1600
High Voltage PFC Controller
with Standby Power Saving
The NCP1600 is an active power factor correction controller that
operates as a boost pre−converter in off−line power supply
applications. NCP1600 is optimized for low to medium power,
high−density power supplies requiring a minimum board area,
reduced component count and low power dissipation. Two
comparators are built into this device to improve standby (power)
efficiency. With these two comparators, the PFC controller
automatically switches itself in between normal mode and standby
mode (skip or off mode) to save power consumption during light load
conditions.
The NCP1600 can achieve deliver follow−boost operation that is
an innovative mode allowing a drastic size reduction of both the
inductor and the power switch. Ultimately, the solution system cost is
significantly lowered. NCP1600 can also work in a traditional
constant output voltage mode and intermediate solutions can be
easily implemented. This flexibility makes it ideal to optimally cope
with a wide range of applications.
Features
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MARKING
DIAGRAM
16
1
A
WL
Y
WW
SO−16
D SUFFIX
CASE 751B
NCP1600
AWLYWW
= Assembly Location
= Wafer Lot
= Year
= Work Week
PIN CONNECTIONS
AGND 1
VREF 2
RD 3
FB_In 4
CS 5
Mir_Out 6
Vth 7
STB 8
(Top View)
16 Line
15 NC
14 FC
13 VCON
12 CT
11 VCC
10 Gate
9
PGND
•
•
•
•
•
•
•
•
•
•
•
Lose Less High−Voltage Startup Source
Standard Constant Output Voltage or “Follow−Boost” Mode
PFC Skip Mode and Off Mode under Light Load Conditions
Selectable Switching Frequency Clamp
Disable Pin to Stop PFC Operation
Restart Delay Timer
Brown−out Protection for Startup
Feedback Loop Open Detection
Output Overvoltage Comparator
Switch Mode Operation: Voltage Mode
Constant On−Time Operation That Saves the Use of an Extra
Multiplier
•
Improved Regulation Block Dynamic Behavior
•
Internally Trimmed Reference Current Source
•
Internal Leading Edge Blanking (LEB) for Noise Immunity
Typical Applications
ORDERING INFORMATION
Device
NCP1600D
Package
SO−16
Shipping
48 Units / Rail
•
•
•
•
Monitor/TV Power Supplies
PC Power Supplies
Notebook PC Adapters
Medium Power Adapters
©
Semiconductor Components Industries, LLC, 2006
July, 2006
−
Rev. 2
1
Publication Order Number:
NCP1600/D
NCP1600
Line
V
REF
NCP1600
Q1
RD
3
AGND
1
−60
mV
Output_Ctrl
Q2
BK2
Timer
Q
R
V
REF
I
REF
BK1
V
REF
Enable
I
REF
C1
UVLO
−
+
+
−
15 V/10 V
Q3
High
Gate
10
Q4
PGND
9
Frequency
Clamp
BK4
11 V
C5
−
+
Output
NT1
3
AND1
1 2
15 pF
11 V
SW1
Output_Ctrl
ON
Output
UVP
OVP
− +
C4
+
BK5
+ −
C3
+
Output
V
REF
V
REG
I
O
I
O
I
O
I
O
I
REF
−
Output
+
C7
1.17 V
−
Output
C6
− +
ICS1
I
OSC
−
ch = 2 * I
O
* I
O
* / I
REF
Current
Mirror
BK6
Current
Mirror
+
11 V
I
REF
GND
FB_In
4
FC
14
V
CON
13
Z15V
VCC
11
16
RS Latch
S
R
R
R
Q
Q
FF1
Output
+
C2
−
Th_
stdwn
3
4
OR1
2
NOR2
5
1
VREF
2
I
REF
(205
mA)
ICS2
+
−
ON
L.E.B.
BK3
SW2
NOR1
Output_Ctrl
CS
5
CT
12
0.75 V
−
2.73 V
−
STB
8
+
−
Vth
7
Mir_Out
6
Figure 1. Detailed Functional Diagram
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2
NCP1600
Universal Input
90~264 Vac
U2
DF06S 1
+
0.22
m,
400 V
4
2
3
+
Line
V
REF
NCP1600
Q1
Output_Ctrl
Q2
BK2
Timer
Q
R
V
REF
I
REF
BK1
V
REF
Enable
I
REF
C1
UVLO
Z15V
16
RD
+
3
+
AGND
1
−60
mV
C2
I
REF
(205
mA)
ICS2
+
−
ON
L.E.B.
BK3
SW2
CS
5
11 V
C5
NOR1
RS Latch
−
+
+
−
15 V/10 V
Q3
High
Q4
VCC
11
+
−
Output
S
R
R
R
Q
FF1
Q
3
4
2
5
Th_
stdwn
NOR2
1
Gate
10
PGND
9
FC
14
V
CON
13
VREF
+
0.1
mF
2
OR1
Output_Ctrl
Frequency
Clamp
BK4
NT1
Output
3
AND1
1 2
0.75 V
Output
Output
UVP
V
REF
BK5
V
REG
I
O
I
O
ON
I
O
I
REF
I
O
−
+
15 pF
+
+−
−
CT
+
12
11 V
Output_Ctrl
+ C3
2.73 V
−+
−
OVP
+ C4
4.7 kW
SW1
I
REF
GN-
D
FB_In
4
11 V
STB
8
+
−
V
th
7
Mir_Out
6
C7
1.17 V
−
+
Output
Output
C6
−
+
−+
ICS1
I
OSC
−
ch = 2 * I
O
* I
O
* /I
REF
Current
Mirror
BK6
Current
Mirror
Figure 2. Representative Application Circuit
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3
NCP1600
PIN FUNCTION DESCRIPTIONS
Pin
1
2
3
4
5
Symbol
AGND
V
REF
Restart Delay, RD
FB_In
CS
Analog Ground.
Output reference voltage 6.5 V.
This pin is a high impedance input and is typically connected to a resistor and capacitor to setup the
Delay Time. After this delay time, the IC will turn off the internal startup FET Q1.
This pin is designed to receive a current that is proportional to the pre−converter output voltage.
This pin is designed to receive a negative voltage signal proportional to the current flowing through the
inductor. This information is generally built using a sense resistor. The Zero Current Detection prevents
any restart as long as the Pin 5 voltage is below (−60 mV). This pin is also used to perform the
peak current limitation. The resistor connected between the pin and the current−sense−resistor programs
the overcurrent threshold.
The Current Mirror delivers one current which is the same as the Pin 4 (FB_In) input current. This
current information is used for disabling the PFC boost pre−converter during Standby, Overvoltage and
Undervoltage conditions.
This pin divides the reference voltage to design the minimum threshold voltage of PFC Output Voltage
during standby.
PFC boost pre−converter standby pin. The PFC enters standby mode (PFC boost pre−converter enter
both skip mode and off mode) when voltage at this pin falls below 1.17 V. This pin also can be connected
to the PWM feedback pin.
Power Ground.
The gate drive current capability is suited to drive an IGBT or a power MOSFET.
This pin is the positive supply of the IC. The circuit turns on when V
CC
becomes higher than 15 V, the
operating range after startup being 8.0 V up to 30 V.
The circuit uses an on−time control mode. This on−time is controlled by comparing the C
T
voltage to
the V
control
voltage. C
T
is charged by the squared feedback current.
This pin makes available the regulation block output. The capacitor connected between this pin and
ground adjusts the control bandwidth. It is typically set below 20 Hz to obtain a nondistorted input
current.
Connecting a resistor and capacitor on this pin to program the maximum switch frequency.
No connection.
This pin connects directly to the rectified AC line voltage source.
Description
6
Mir_Out
7
8
V
th
STB
9
10
11
12
13
PGND
Gate
V
CC
C
T
V
CON
14
15
16
Freq. Clamp, FC
NC
Line
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4
NCP1600
MAXIMUM RATINGS
Rating
Power Supply Voltage (Transient), Pin 11 to both the AGND Pin and PGND Pin
Power Supply Voltage (Operating), Pin 11 to both the AGND Pin and PGND Pin
Line Voltage, Pin 16 to both the AGND Pin and PGND Pin
Power Supply Voltage on all Pins Except Pin 4, Pin 11, Pin 16, and Pin 10
Feedback Pin Voltage, Pin 4 to both the AGND Pin and PGND Pin
Gate Pin Voltage, Pin10 to both the AGND Pin and PGND Pin
Restart Diode Current
Gate Driver Output Current, Source or Sink, Pin 10
Power Dissipation and Thermal Characteristic
D Suffix, Plastic Package Case 751B
Maximum Power Dissipation @ T
A
= 70°C
Thermal Resistance, Junction−to−Air
Operating Junction Temperature
Storage Temperature Range
Symbol
V
CC
V
CC
V
Line
−
V
FB_In
V
Gate
I
IN
I
Gate
Value
30
25
500
−0.3
to +10
−0.3
to +6.5
−0.3
to 15
5.0
1.0
Unit
V
V
V
V
V
V
mA
A
P
D
R
qJA
T
J
T
stg
550
145
150
−55
to +150
mW
°C/W
°C
°C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. This device series contains ESD protection and exceeds the following tests:
Human Body Model (HBM)
"2.0
kV per JEDEC standard: JESD22−A114.
Machine Model (MM)
"200
V per JEDEC standard: JESD22−A115.
2. Latchup Current Maximum Rating:
$150
mA per JEDEC standard: JESD78.
3. Moisture Sensitivity Level (MSL): 1 per IPC/JEDEC standard: J−STD−020A.
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