NCP1650_05 ONSEMI [ON Semiconductor], NCP1650_05 Datasheet

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NCP1650_05

Manufacturer Part Number
NCP1650_05
Description
Power Factor Controller
Manufacturer
ONSEMI [ON Semiconductor]
Datasheet
NCP1650
Power Factor Controller
can operate over a wide range of input voltages, and output power
levels. It is designed to operate on 50/60 Hz power systems. This
controller offers several different protection methods to assure safe,
reliable operation under any conditions.
with a wide complement of features. These features allow for both
flexibility as well as precision in it’s application to a circuit. Critical
components of the internal circuitry are designed for high accuracy,
which allows for precise power and current limiting, therefore
minimizing the amount of overdesign necessary for the power stage
components.
maintain excellent power factor even in constant power mode. It also
contains features that allow for fast transient response to changing
load currents and line voltages.
Features
Typical Applications
*For additional information on our Pb−Free strategy and soldering details, please
© Semiconductor Components Industries, LLC, 2005
October, 2005 − Rev. 10
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
The NCP1650 is an active, power factor correction controller that
The PWM is a fixed frequency, average current mode controller
The NCP1650 is designed with a true power limiting circuit that will
Fixed Frequency Operation
Average Current Mode PWM
Continuous or Discontinuous Mode Operation
Fast Line/Load Transient Compensation
True Power Limiting Circuit
High Accuracy Multipliers
Undervoltage Lockout
Overvoltage Limiting Comparator
Brown Out Protection
Ramp Compensation Does Not Affect Oscillator Accuracy
Operation from 25 to 250 kHz
Pb−Free Package is Available*
Server Power Converters
Front End for Distributed Power Systems
1
†For information on tape and reel specifications,
NCP1650DR2
NCP1650DR2G
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
LOOP COMP
AC COMP
AC INPUT
Device
AC REF
A
WL
Y
WW
G
P
16
FB/SD
ORDERING INFORMATION
COMP
V
V
ref
MARKING DIAGRAM
PIN CONNECTIONS
in
1
http://onsemi.com
16
1
2
3
4
5
6
7
8
1
(Pb−Free)
NCP1260G
SOIC−16
SOIC−16
Package
AWLYWW
(Top View)
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
Publication Order Number:
CASE 751B
D SUFFIX
SO−16
2500/Tape & Reel
2500/Tape & Reel
15
14
13 RAMP COMP
16
12
11
10
9
Shipping
OUTPUT
GND
C
I
I
I
Pmax
S−
avg−fltr
avg
T
NCP1650/D

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NCP1650_05 Summary of contents

Page 1

NCP1650 Power Factor Controller The NCP1650 is an active, power factor correction controller that can operate over a wide range of input voltages, and output power levels designed to operate on 50/60 Hz power systems. This controller offers ...

Page 2

PIN FUNCTION DESCRIPTION Pin # Function 1 V Provides power to the device. This pin is monitored for undervoltage and the unit will not operate if the CC V voltage is not within the UVLO range 6.5 ...

Page 3

MAXIMUM RATINGS (Maximum ratings are those that, if exceeded, may cause damage to the device. Electrical Characteristics are not guaranteed over this range.) Rating Power Supply Voltage (Operating) Output (Pin 16) Current Sense Inverting Input (Pin 12) Reference Voltage (Pin ...

Page 4

ELECTRICAL CHARACTERISTICS typical values. For min/max values T is the applicable junction temperature.) J Characteristic POWER ERROR AMPLIFIER ( comp Input Offset Voltage (Note 3) Transconductance Output Source (V + 0.2 V) ref Output Sink (V ...

Page 5

ELECTRICAL CHARACTERISTICS typical values. For min/max values T is the applicable junction temperature.) J Characteristic MAXIMUM POWER MULTIPLIER Multiplier Gain V pin9 4 (−V pin12 ) V pin5 ...

Page 6

LOOP COMP 200 mA 4.24 V − + ERROR AMP 20 mA FB/SD VOLTAGE/POWER + ORing NETWORK − 200 mA + 3.68 V − P COMP POWER MULTIPLIER REFERENCE MULTIPLIER AC INPUT OSCILLATOR GND RAMP COMP C T ...

Page 7

UVLO or SHUTDOWN OVERVOLTAGE COMPARATOR DRIVE LATCH Q AC Error Amp + Ramp Comp + Inductor Current 4 V GND OSCILLATOR RAMP OSCILLATOR BLANKING PULSE (Test circuits are located in the document TND307/D) 130 125 120 115 110 105 100 ...

Page 8

TND307/D) 100 100 1.0 10 FREQUENCY (kHz) Figure 4. C versus Frequency T 4.40 NOTE: Ramp Valley Voltage 4.35 is Zero for all Frequencies 4.30 4.25 4.20 4.15 ...

Page 9

TND307/D) 300 200 100 0 −100 −200 −300 −0.6 −0.4 −0.2 0 PIN 6 VOLTAGE RELATIVE TO 4.0 V REF−BOOST CIRCUIT Figure 10. Voltage Amplifier Gain 400 300 200 100 0 −100 −200 ...

Page 10

TND307/D) 5.0 1.5 V PIN 4.0 3.0 2.0 1 1.0 2.0 3 PIN 5 (V) AC Figure 16. Reference Multiplier Transfer Function 10 ...

Page 11

TND307/D) 6.52 25°C 6.50 −40°C 6.48 6.46 125°C 6. LOAD CURRENT (mA) Figure 22. V Load Regulation ref 10.6 TURN ON 10.5 10.4 10.3 10.2 10.1 TURN OFF 10.0 ...

Page 12

V FB/ ref 2 NCP1650 RESISTOR−DIODE NETWORK Figure 26. Shutdown Override Circuit (This circuit will not override the shutdown until the chip has achieved it’s initial enable state − Shutdown 0 V ...

Page 13

LOOP COMP 200 mA 4. − + ERROR AMP FB/SD VOLTAGE/POWER ORing NETWORK 6 − 200 mA + 3.68 V − Pmax 9 P COMP 8 a POWER MULTIPLIER p a REFERENCE MULTIPLIER ...

Page 14

Introduction Optimizing the power factor of units operating off of AC lines is becoming more and more important. There are a number of reasons for this. There are a growing number of government regulations requiring Power Factor Correction (PFC). Many ...

Page 15

FB/SD V − error(dc) + VOLTAGE 4 V ERROR LOOP AMP COMP V REFERENCE ref MULTIPLIER AC INPUT + V line .75 − AVERAGE CURRENT COMPENSATION Figure 32. Simplified Block Diagram of Basic PFC Control Circuit The key to understanding ...

Page 16

The difference between V error(ac) reference, sets the window that the instantaneous current will modulate in, to determine when to turn the power switch off. The switch is turned on by the oscillator, which makes this a fixed frequency controller. ...

Page 17

DC Reference and Buffer The internal DC reference is a precision bandgap design with a nominal output voltage of 4.0 volts temperature compensated, and trimmed for a $1% tolerance of its nominal voltage, with an overall tolerance over ...

Page 18

Gain” pin, due to tolerance variations of the internal resistances. The voltage−to−current conversion is performed in the Voltage/Power ORing network. This circuit also limits the maximum input signal (from the ...

Page 19

The amount of compensation required is dependent on several variables, including the boost inductor value, and the desires of the designer. The value should be based ...

Page 20

Error Amplifiers The NCP1650 has three error amplifiers. These amplifiers regulate the DC output voltage, the maximum output power, and shape the AC reference fullwave rectified sinewave signal. All three of these are transconductance amplifiers. Transconductance amplifiers differ from voltage ...

Page 21

Current Sense Amplifier The current sense amplifier is a wide bandwidth amplifier with a differential input. It consists of a differential input stage, a high frequency current mirror and a low frequency current mirror, for a total of three current ...

Page 22

Comparator monitors the output voltage and will shutdown operation of the PWM circuit if the output voltage exceeds 8% above the normal regulation level. The Overshoot Comparator signal is fed into the second Set input to the latch. AC Reference ...

Page 23

D 1 LOOP COMP 4. − ERROR 7 FB/SD AMP + − − 3. COMP 8 P max ...

Page 24

For a first approach, the following formula will give the inductance value that will cause the peak current fraction of the peak line frequency current. T · · I% ...

Page 25

Current Sense Resistor/Ramp Compensation The combination of the voltage developed across the current sense resistor and ramp compensation signal, will determine the peak instantaneous current that the power switch will be allowed to conduct before it is turned off. The ...

Page 26

This equation does not allow for tolerances, and it would be advisable to increase the input power to assure operation at maximum power over production tolerance variations. The current sense filter capacitor should be selected to set it’s pole about ...

Page 27

R ac2 R dc1 FB/SD V′ e/a ORing NET 6 − −0.32 mA/V ERROR 4 V AMP R dc2 LOOP COMP DIVIDER ERROR AMP R dc2 unity + ...

Page 28

The equation for the gain is good for frequencies below the pole. There is a single pole due to the output filter. Since the NCP1650 is a current mode ...

Page 29

V line R ac1 V AC INPUT ac2 V pm POWER MULTIPLIER P max + 9 − POWER 2.5 V AMP LOOP COMP POWER MULTIPLIER POWER AMP ...

Page 30

Power Amplifier The compensation for this amplifier will be determined similar to the network for the voltage error amplifier. The series RC on pin 8 will create a pole−zero pair based on the equations given. Calculating the Loop Gain The ...

Page 31

G −T− SEATING PLANE 0.25 (0.010 The product described herein (NCP1650), may be covered by U.S. patents including 5,502,370, 5,359,281 and 6,373,734. Other patents may be pending. ON Semiconductor and ...

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