NCL30081ASNT1G ON Semiconductor, NCL30081ASNT1G Datasheet
NCL30081ASNT1G
Specifications of NCL30081ASNT1G
Related parts for NCL30081ASNT1G
NCL30081ASNT1G Summary of contents
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... V Under Voltage Lockout ♦ CC Thermal Shutdown ♦ This document contains information on a product under development. ON Semiconductor reserves the right to change or discontinue this product without notice. © Semiconductor Components Industries, LLC, 2013 March, 2013 − Rev. P1 http://onsemi.com TSOP−6 SN SUFFIX ...
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Figure 1. Typical Application Schematic for NCL30081 Table 1. PIN FUNCTION DESCRIPTION Pin No Pin Name Function 1 ZCD Zero Crossing Detection 2 GND − Current sense 4 DRV Driver output 5 VCC Supplies the ...
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GND Qdrv Zero Crossing Detection ZCD Aux. Winding Short Circuit Protection V offset_OK VIN Line Feedforward STEP_DIM CS Leading Constant−Current Edge Blanking Max. Peak Current Limit CS Short Protection V VIN Winding and Output diode Short Circuit Protection STOP Aux_SCP ...
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Table 2. MAXIMUM RATINGS TABLE Symbol V Maximum Power Supply voltage, VCC pin, continuous voltage CC(MAX) I Maximum current for VCC pin CC(MAX) V Maximum driver pin voltage, DRV pin, continuous voltage DRV(MAX) I Maximum current for DRV pin DRV(MAX) ...
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Table 3. ELECTRICAL CHARACTERISTICS For min/max values T = −40°C to +125°C, Max T J Description STARTUP AND SUPPLY CIRCUITS Supply Voltage Startup Threshold Minimum Operating Voltage Hysteresis V – V CC(on) CC(off) Internal logic reset Over Voltage Protection VCC ...
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Table 3. ELECTRICAL CHARACTERISTICS For min/max values T = −40°C to +125°C, Max T J Description ZERO VOLTAGE DETECTION CIRCUIT ZCD threshold voltage ZCD threshold voltage (Note 4) ZCD hysteresis (Note 4) Threshold voltage for output short circuit or aux. ...
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Table 3. ELECTRICAL CHARACTERISTICS For min/max values T = −40°C to +125°C, Max T J Description VALLEY SELECTION Valley thresholds valley transition at LL and valley transition ...
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T , JUNCTION TEMPERATURE (°C) J Figure 3. V vs. Junction Temperature CC(on) 27.80 27.75 27.70 27.65 27.60 27.55 27.50 27.45 27.40 −40 − ...
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T , JUNCTION TEMPERATURE (°C) J Figure 9. I vs. Junction Temperature CC(start) 1.51 1.50 1.49 1.48 1.47 1.46 −40 − JUNCTION ...
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T , JUNCTION TEMPERATURE (°C) J Figure 15. t vs. Junction Temperature TIMO 178 177 176 175 174 173 172 −40 − ...
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T , JUNCTION TEMPERATURE (°C) J Figure 21. V vs. Junction Temperature REF05 17.65 17.60 17.55 17.50 17.45 17.40 −40 − ...
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T , JUNCTION TEMPERATURE (°C) J Figure 27. V vs. Junction VLY1−2/2−3 Temperature 124.6 124.4 124.2 124.0 123.8 123.6 123.4 −40 − ...
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T , JUNCTION TEMPERATURE (°C) J Figure 33. V vs. Junction VLY7−11/8−12 Temperature 15.6 15.1 14.6 14.1 13.6 13.1 12.6 −40 − ...
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T , JUNCTION TEMPERATURE (°C) J Figure 39. t vs. Junction BO(BLANK) Temperature 4.40 4.35 4.30 4.25 4.20 4.15 4.10 4.05 −40 −20 Figure 41. t ...
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The NCL30081 implements a current−mode architecture operating in quasi−resonant mode. Thanks to proprietary circuitry, the controller is able to accurately regulate the secondary side current of the flyback converter without using any opto−coupler or measuring directly the secondary side current. ...
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Constant Current Control Figure 43 portrays the primary and secondary current of a flyback converter in discontinuous conduction mode V bulk R C clp Clamping network DRV Figure 42. Basic Flyback Converter Schematic (DCM). Figure 42 shows the basic circuit ...
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During the on−time of the MOSFET, the bulk voltage V is applied to the magnetizing and leakage inductors L bulk and L and the current ramps up. leak When the MOSFET is turned−off, the inductor current first charges C . ...
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Internal Soft−Start At startup or after recovering from a fault, there is a small internal soft−start of 40 ms. In addition, during startup, as the output voltage is zero volts, the demagnetization time is long and the constant 16.0 12.0 ...
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CS LEB1 + Rsense − Vcontrol + − V ILIMIT LEB2 + − V CS(stop) Figure 45. Winding Short Circuit Protection, Max. Peak Current Limit Circuits Step Dimming The step dimming function decreases the output current from 100 ...
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V bulk V bulk(on) V bulk(off CC(on) V CC(off) V CC(reset) BO comp 100% I out 70% 40% 25% Figure 47. Step Dimming Chronograms http://onsemi.com 20 10% 5% ...
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V Over Voltage Protection (Open LED Protection output load is connected to the LED power supply, the controller must be able to safely limit the output voltage excursion. 40.0 V CC(OVP) 30.0 V CC(on) 20.0 10.0 V ...
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Vbulk VIN + − 2 LLine low 2 LLine high Table 5. VALLEY SELECTION I value at which the out controller changes valley (I decreasing) out 0 100% 75% 50% 30% 15 25−ms ...
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Zero Crossing Detection Block The ZCD pin allows detecting when the drain−source voltage of the power MOSFET reaches a valley. A valley is detected when the voltage on pin 1 crosses below the V internal threshold. ZCD(THD) At startup or ...
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Line Feed−forward Because of internal and external propagation delays, the MOSFET is not turned−off immediately when the current set−point is reached result, the primary peak current is slightly higher than expected resulting in a small output current error ...
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V BO(on) 900m V BO(off) 700m 500m 300m 8.00 50−ms Timer 6.00 4.00 2.00 0 46.1m 138m Figure 53. Brown−Out Chronograms (Valley Fill circuit is used) V CC(on) V ...
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CS Pin Short Circuit Protection Normally, if the CS pin or the sense resistor is shorted to ground, the Driver will not be able to turn off, leading to potential damage of the power supply. To avoid this, the NCL30081 ...
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Timer has finished counting V _OVP CC 4−s Timer WOD_SCP or Aux_SCP or V _OVP CC With states: Reset → Controller is reset, I Stop → Controller is ON, DRV is not switching Run → Normal switching V Disch. No ...
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Timer has finished counting V < CC(reset) 4−s V Timer V _OVP CC Latch WOD_SCP or Aux_SCP With states: Reset → Controller is reset, I Stop → Controller is ON, DRV is not switching Run Normal switching → ...
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... NOTE 0.05 A1 *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. PACKAGE DIMENSIONS TSOP−6 CASE 318G−02 ISSUE V NOTES: 1. DIMENSIONING AND TOLERANCING PER ASME Y14.5M, 1994. 2. CONTROLLING DIMENSION: MILLIMETERS. ...
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... NCL30081A NCL30081B ORDERING INFORMATION Device Package Marking NCL30081ASNT1G NCL30081BSNT1G †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. ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of SCILLC’ ...