NCP1650DR2 ON Semiconductor, NCP1650DR2 Datasheet
NCP1650DR2
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NCP1650DR2 Summary of contents
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... FB/SD 6 LOOP COMP COMP (Top View) ORDERING INFORMATION Device Package NCP1650DR2G SOIC--16 (Pb--Free) †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. 1 SO- -16 D SUFFIX CASE 751B ...
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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 ...
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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 ...
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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 ...
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ELECTRICAL CHARACTERISTICS typical values. For min/max values T is the applicable junction temperature.) J Characteristic MAXIMUM POWER MULTIPLIER Multiplier Gain V pin9 K = ≈ (--V pin12 ) × V pin5 ...
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LOOP COMP 4.24 V 200 ERROR AMP FB/ VOLTAGE/POWER + ORing NETWORK -- 4 V 200 COMP POWER MULTIPLIER REFERENCE MULTIPLIER AC INPUT OSCILLATOR GND RAMP COMP C T ...
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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 ...
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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 ...
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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 ...
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TND307/D) 5.0 PIN 1 4.0 3.0 2.0 1 1.0 2.0 3 PIN 5 (V) AC Figure 16. Reference Multiplier Transfer Function 10 ...
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TND307/D) 6.52 25C 6.50 --40C 6.48 6.46 125C 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 ...
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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 ...
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LOOP COMP 4.24 V 200 ERROR AMP FB/SD VOLTAGE/POWER ORing NETWORK 200 Pmax 9 P COMP 8 a POWER MULTIPLIER p a REFERENCE MULTIPLIER ...
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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 ...
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FB/ 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 ...
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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. ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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... Note: This is a theoretical design, and it is not implied that a circuit designed by this procedure will operate properly without normal troubleshooting and adjustments as are common with any power conversion circuit. ON Semiconductor provides a spread sheet that incorporates the following equations, and will calculate the bias components for a circuit using the above schematic. ...
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... VDC 1000 watts max the inductance would be 74 mH. Using the ON Semiconductor spreadsheet, a value of 250 mH allows for continuous mode operation at full load and most input voltages. At the high line value of 265 vac, the unit will operate in the continuous mode from 30 to 150 ...
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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 ...
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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 ...
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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 G m V′ f unity = = ...
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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 ...
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V line R ac1 V AC INPUT ac2 V POWER pm MULTIPLIER P max + 9 -- POWER 2.5 V AMP LOOP COMP POWER MULTIPLIER POWER AMP ...
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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 ...
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... *For additional information on our Pb--Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “ ...