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    L4990 Price and Stock

    Gedore Torque Ltd KL-4990-2003

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    DigiKey KL-4990-2003 Bulk 1
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    Gedore Torque Ltd KL-4990-1018

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    DigiKey KL-4990-1018 Bulk 1
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    Gedore Torque Ltd KL-4990-1107

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    DigiKey KL-4990-1107 Bulk 1
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    Gedore Torque Ltd KL-4990-1118

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    DigiKey KL-4990-1118 Bulk 1
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    Gedore Torque Ltd KL-4990-1003

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    DigiKey KL-4990-1003 Bulk 1
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    L4990 Datasheets (24)

    Part ECAD Model Manufacturer Description Curated Datasheet Type PDF
    L4990 STMicroelectronics PRIMARY CONTROLLER Original PDF
    L4990 STMicroelectronics PRIMARY CONTROLLER Scan PDF
    L4990 STMicroelectronics PRIMARY CONTROLLER Scan PDF
    L4990 STMicroelectronics PRIMARY CONTROLLER Scan PDF
    L4990 STMicroelectronics PRIMARY CONTROLLER Scan PDF
    L4990 STMicroelectronics PRIMARY CONTROLLER Scan PDF
    L4990A STMicroelectronics PRIMARY CONTROLLER Original PDF
    L4990A STMicroelectronics PRIMARY CONTROLLER Scan PDF
    L4990A STMicroelectronics PRIMARY CONTROLLER Scan PDF
    L4990A STMicroelectronics PRIMARY CONTROLLER Scan PDF
    L4990A STMicroelectronics PRIMARY CONTROLLER Scan PDF
    L4990A STMicroelectronics PRIMARY CONTROLLER Scan PDF
    L4990AD STMicroelectronics PRIMARY CONTROLLER Original PDF
    L4990AD STMicroelectronics PRIMARY CONTROLLER Scan PDF
    L4990AD STMicroelectronics PRIMARY CONTROLLER Scan PDF
    L4990AD STMicroelectronics PRIMARY CONTROLLER Scan PDF
    L4990AD STMicroelectronics PRIMARY CONTROLLER Scan PDF
    L4990AD STMicroelectronics PRIMARY CONTROLLER Scan PDF
    L4990D STMicroelectronics PRIMARY CONTROLLER Original PDF
    L4990D STMicroelectronics PRIMARY CONTROLLER Scan PDF

    L4990 Datasheets Context Search

    Catalog Datasheet MFG & Type PDF Document Tags

    flyback smps 300w

    Abstract: bjt 2n2222 driver circuit variac used as a battery charger 12v 50 A battery charger smps schematic flyback transformer philips TV 29 inch schematic smps 300W BCD60II L4990 L4990A SO16W
    Text: L4990 L4990A  PRIMARY CONTROLLER CURRENT-MODE CONTROL PWM SWITCHING FREQUENCY UP TO 1MHz LOW START-UP CURRENT < 0.45mA HIGH-CURRENT OUTPUT DRIVE SUITABLE FOR POWER MOSFET 1A FULLY LATCHED PWM LOGIC WITH DOUBLE PULSE SUPPRESSION PROGRAMMABLE DUTY CYCLE


    Original     		PDF L4990 L4990A 100ns DIP16 SO16W DIP16 L4990/L4990A DIP16) L4990D/L4990AD flyback smps 300w bjt 2n2222 driver circuit variac used as a battery charger 12v 50 A battery charger smps schematic flyback transformer philips TV 29 inch schematic smps 300W BCD60II L4990 L4990A SO16W

    vrm pentium 4

    Abstract: L4990 SMPS 30 SMPS l4990a AN908 circuit of smps AN881 AN891 vrm pentium pro
    Text: L4990 Low Cost Active Clamp for High Frequency Applications - AN881 Appl. Note Serigraphy 104mm 65mm Component Layer Back layer L4990 SMPS with L4990 for Multisinch Monitor Applications - AN891 Appl. Note Serigraphy L4990 SMPS with L4990 for Multisinch Monitor Applications - AN891 Appl. Note


    Original     		PDF L4990 AN881 104mm L4990 AN891 182mm vrm pentium 4 SMPS 30 SMPS l4990a AN908 circuit of smps vrm pentium pro

    diac advantage

    Abstract: BC237 transistor bc237 bc337 TRANSISTOR bc337 40 opto diac ROE EYS 06 transistor C2627 BC337 300W half bridge ferrite material 3c85
    Text: APPLICATION NOTE 300W SECONDARY CONTROLLED TWO-SWITCH FORWARD CONVERTER WITH L4990A by: N.Tricomi C. Adragna INTRODUCTION A typical off-line isolated switch-mode power supply has the controller located on the primary side of the transformer, whereas the output voltages to be controlled and the housekeeping functions are located on the secondary side. Usually


    Original     		PDF L4990A diac advantage BC237 transistor bc237 bc337 TRANSISTOR bc337 40 opto diac ROE EYS 06 transistor C2627 BC337 300W half bridge ferrite material 3c85

    philips 3f3 ferrite

    Abstract: ac-dc adapter isolated feedback flyback converter L4990 circuits using BJT 2N2222 in transistor L4990A bjt 2n2222 driver circuit ACDC adaptor variac used as a battery charger T2A250V
    Text: L4990 L4990A PRIMARY CONTROLLER CURRENT-MODE CONTROL PWM SWITCHING FREQUENCY UP TO 1MHz LOW START-UP CURRENT < 0.45mA HIGH-CURRENT OUTPUT DRIVE SUITABLE FOR POWER MOSFET 1A FULLY LATCHED PWM LOGIC WITH DOUBLE PULSE SUPPRESSION PROGRAMMABLE DUTY CYCLE 100% AND 50% MAXIMUM DUTY CYCLE


    Original     		PDF L4990 L4990A 100ns DIP16 SO16W DIP16 L4990/L4990A DIP16) L4990D/L4990AD philips 3f3 ferrite ac-dc adapter isolated feedback flyback converter L4990 circuits using BJT 2N2222 in transistor L4990A bjt 2n2222 driver circuit ACDC adaptor variac used as a battery charger T2A250V

    Transistor BC327 Q1

    Abstract: STP60N03 STP80N03 bc327 pinout BC327 Q1 3A-12 AN908 BC337 L4990A M74HC125
    Text: AN908 Application note High performance VRM using L4990A, for Pentium Pro processor Introduction The actual generation of Pentium Pro® microprocessors, requires a power supply with a programmable output voltage that decreases with the increasing of the processor internal


    Original     		PDF AN908 L4990A, Transistor BC327 Q1 STP60N03 STP80N03 bc327 pinout BC327 Q1 3A-12 AN908 BC337 L4990A M74HC125

    TL431 application note

    Abstract: KTC1815Y transformer winding formula 220v Ac to 12v Dc TL431* Application Note NA60FI TL431 application 220 volt ac transformer less power supply 90v T3 15A 250V KTC-1815Y smps 12 volt
    Text: APPLICATION NOTE SMPS WITH L4990 FOR MULTISYNC MONITORS by CW Park & G. Gattavari overcurrent protection. Due to the integration of the listed functions , very often used in monitors power supplies, the component count is dramatically reduced . The L4990 allows to design high performance


    Original     		PDF L4990 100kHz TL431 application note KTC1815Y transformer winding formula 220v Ac to 12v Dc TL431* Application Note NA60FI TL431 application 220 volt ac transformer less power supply 90v T3 15A 250V KTC-1815Y smps 12 volt

    transformer winding formula 220v Ac to 12v Dc

    Abstract: KTC1815Y 220V ferrite core transformer free data transformer calculation 220V ferrite core transformer eer4242 transformer winding formula 12v Dc to 220v ac smps 10w 12V 220v ac to 12V 10A SMPS 12v transformer winding formula
    Text: APPLICATION NOTE SMPS WITH L4990 FOR MULTISYNC MONITORS by CW Park & G. Gattavari overcurrent protection. Due to the integration of the listed functions , very often used in monitors power supplies, the component count is dramatically reduced . The L4990 allows to design high performance


    Original     		PDF L4990 transformer winding formula 220v Ac to 12v Dc KTC1815Y 220V ferrite core transformer free data transformer calculation 220V ferrite core transformer eer4242 transformer winding formula 12v Dc to 220v ac smps 10w 12V 220v ac to 12V 10A SMPS 12v transformer winding formula

    uc3842 AC-DC application

    Abstract: 24v to 12v dc power supply with uc3842 switching adaptor output 12V circuit diagram uc3842 DC-DC application 24v to 5v dc power supply with uc3842 pcb for uc3842 flyback transfer function L4990
    Text: L4990 L4990A PRIMARY CONTROLLER PRODUCT PREVIEW CURRENT-MODE CONTROL PWM SWITCHING FREQUENCY UP TO 1MHz LOW START-UP CURRENT < 0.5mA HIGH-CURRENT OUTPUT DRIVE SUITABLE FOR POWER MOSFET 1A FULLY LATCHED PWM LOGIC WITH DOUBLE PULSE SUPPRESSION PROGRAMMABLE DUTY CYCLE


    Original     		PDF L4990 L4990A 100ns DIP16 SO16W BCD60II DIP16 SO16W uc3842 AC-DC application 24v to 12v dc power supply with uc3842 switching adaptor output 12V circuit diagram uc3842 DC-DC application 24v to 5v dc power supply with uc3842 pcb for uc3842 flyback transfer function

    BC237

    Abstract: ROE EYS opto diac ROE EYS capacitor BC337 300w transistor power amplifier circuit diagram ETD39 24v ROE capacitor EYS DIODE 255 KE BYT11600
    Text: AN890 APPLICATION NOTE  300W SECONDARY CONTROLLED TWO-SWITCH FORWARD CONVERTER WITH L4990A by: N.Tricomi C. Adragna INTRODUCTION A typical off-line isolated switch-mode power supply has the controller located on the primary side of the transformer, whereas the output voltages to be controlled and the housekeeping functions are located on the secondary side. Usually


    Original     		PDF AN890 L4990A BC237 ROE EYS opto diac ROE EYS capacitor BC337 300w transistor power amplifier circuit diagram ETD39 24v ROE capacitor EYS DIODE 255 KE BYT11600

    AN889

    Abstract: BC337 BYT11 BYT11600 L4990 SB860 AC-DC Battery Charger -Constant Current BC337 figure potentiometer 100k .25w
    Text: APPLICATION NOTE 25W OFF-LINE AUTORANGING BATTERY CHARGER WITH L4990 by N. Tricomi and D. Arrigo This note describes an off-line autoranging 85Vac-264Vac battery charger designed to operate in three different functional modes: - constant voltage - constant current


    Original     		PDF L4990 85Vac-264Vac) AN889 BC337 BYT11 BYT11600 L4990 SB860 AC-DC Battery Charger -Constant Current BC337 figure potentiometer 100k .25w

    20L25CT

    Abstract: AN908 LM339 equivalent M74HC125 BC337 equivalent equivalent for BC337 T3852 T38-52 3A-12 BC327
    Text: AN908 APPLICATION NOTE HIGH PERFORMANCE VRM USING L4990A, FOR Pentium Pro PROCESSOR by Nicola Tricomi SYSTEM DESCRIPTION The actual generation of Pentium Pro® microprocessors, requires a power supply with a programmable output voltage that decreases with the increasing of the processor internal clock. At the same time


    Original     		PDF AN908 L4990A, 20L25CT AN908 LM339 equivalent M74HC125 BC337 equivalent equivalent for BC337 T3852 T38-52 3A-12 BC327

    uc3842

    Abstract: boost uc3842 application note uc3842 application circuit uc3842 power factor UC3842 boost L4981A 1N4148 L4990
    Text: APPLICATION NOTE L4981A SYNCHRONIZATION by C. Adragna Let us take into consideration how to interface the L4981A with other PWM controllers each requiring different interconnections. The devices that have been considered in the following examples are the L4990 PWM primary


    Original     		PDF L4981A L4990 theUC3842 L4990 uc3842 boost uc3842 application note uc3842 application circuit uc3842 power factor UC3842 boost 1N4148

    transformer winding formula 220v Ac to 12v Dc

    Abstract: transformer calculation flyback transformer FBT 18 schematic diagram AC to DC converter 800W 220V to 12V AC transformer 12w 80V DC to 12v dc 5 amp converter circuit diagram flyback transformer 4kV 24 volt output smps design 220V ferrite core transformer free data flyback transformer monitor
    Text: AN891 Application note SMPS with L4990 for Multisync monitors Introduction This paper can be used as design guide of a flyback converter for monitors power supply. The high performance PWM controller L4990 is being used to meet new spec requirements for monitors power supply. The basic requirements of a monitor power supply are listed


    Original     		PDF AN891 L4990 100kHz transformer winding formula 220v Ac to 12v Dc transformer calculation flyback transformer FBT 18 schematic diagram AC to DC converter 800W 220V to 12V AC transformer 12w 80V DC to 12v dc 5 amp converter circuit diagram flyback transformer 4kV 24 volt output smps design 220V ferrite core transformer free data flyback transformer monitor

    bc337 pin out diagram

    Abstract: tl431 CONSTANT CURRENT lm358 IC charger on LM358 potentiometer 100k .25w
    Text: APPLICATION NOTE 25W OFF-LINE AUTORANGING BATTERY CHARGER WITH L4990 by Nicola Tricomi This note describes an off-line autoranging 85Vac-264Vac battery charger designed to operate in three different functional modes: - constant voltage - constant current


    Original     		PDF L4990 85Vac-264Vac) bc337 pin out diagram tl431 CONSTANT CURRENT lm358 IC charger on LM358 potentiometer 100k .25w

    20L25CT

    Abstract: BC327 BC337 noise figure M74HC125 equivalent for BC337 532956-7 BC337 figure AN908 3A-12 BC327 L4990A
    Text: AN908 APPLICATION NOTE HIGH PERFORMANCE VRM USING L4990A, FOR Pentium Pro PROCESSOR by Nicola Tricomi SYSTEM DESCRIPTION The actual generation of Pentium Pro microprocessors, requires a power supply with a programmable output voltage that decreases with the increasing of the processor internal clock. At the same time


    Original     		PDF AN908 L4990A, 20L25CT BC327 BC337 noise figure M74HC125 equivalent for BC337 532956-7 BC337 figure AN908 3A-12 BC327 L4990A

    Untitled

    Abstract: No abstract text available
    Text: L4990 L4990A PRIMARY CONTROLLER • ■ ■ ■ ■ ■ ■ . ■ ■ ■ ■ . ■ CURRENT-MODE CONTROL PWM SWITCHING FREQUENCY UP TO 1MHz LOW START-UP CURRENT < 0.45mA HIGH-CURRENT OUTPUT DRIVE SUITABLE FOR POWER MOSFET 1 A FULLY LATCHED PWM LOGIC WITH DOU­


    OCR Scan     		PDF L4990 L4990A 100ns DIP16 S016W BCD60II TECH20 DIP16 L4990

    TRANSISTOR KT 837

    Abstract: No abstract text available
    Text: S G S -1H 0M S 0 N ^7#« [üifl[| œ[llL[ECTffi[i 0©i L4990 L4990A r= 7 PRIMARY CONTROLLER • ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ CURRENT-MODE CONTROL PWM SWITCHING FREQUENCY UP TO 1MHz LOW START-UP CURRENT < 0.45mA HIGH-CURRENT OUTPUT DRIVE SUITABLE


    OCR Scan     		PDF L4990 L4990A 100ns DIP16 S016W L4990 TRANSISTOR KT 837

    300W HI FI AMPLIFIER

    Abstract: L4998 flyback smps 300w T2A250V 220 volt double pole switch circuit diagram schematic smps 300W BCD60II L4990 L4990A bjt 2n2222 driver circuit
    Text: - , k7 # . L4990 L4990A S G S -T H O M S O N R f f l D t g œ H I L I Ê 'î n S O R Ô D t g S PRIM ARY CO NTRO LLER • ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ . CURRENT-MODE CONTROL PWM SWITCHING FREQUENCY UP TO 1MHz LOW START-UP CURRENT < 0.45mA


    OCR Scan     		PDF L4990 L4990A 100ns DIP16 S016W BCD60II 300W HI FI AMPLIFIER L4998 flyback smps 300w T2A250V 220 volt double pole switch circuit diagram schematic smps 300W L4990A bjt 2n2222 driver circuit

    Untitled

    Abstract: No abstract text available
    Text: S G S -1H 0 M S 0 N L4990 L4990A > PRIMARY CONTROLLER PRODUCT PREVIEW CURRENT-MODE CONTROL PWM SWITCHING FREQUENCY UP TO 1MHz LOW START-UP CURRENT < 0.5mA HIGH-CURRENT OUTPUT DRIVE SUITABLE FOR POWER MOSFET 1 A FULLY LATCHED PWM LOGIC WITH DOU­ BLE PULSE SUPPRESSION


    OCR Scan     		PDF L4990 L4990A 100ns DIP16 S016W BCD60II 7T2T537 L4990 7TE1E37

    uc3842 AC-DC application

    Abstract: L4998 24v dc power supply with uc3842 flyback transfer function 24v to 12v dc power supply with uc3842 CJ 4148 ZENER TI 81W 24v to 5v dc power supply with uc3842 UC3842 application 24V uc3842 dc/dc converter 24v application circuits
    Text: Æ 7 ^ 7 # L4990 L4990A S G S -T H O M S O N . R fflO Ê lO ilU ig lM IiD ig i PRIMARY CONTROLLER PRODUCT PREVIEW • ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ CURRENT-MODE CONTROL PWM SWITCHING FREQUENCY UP TO 1MHz LOW START-UP CURRENT < 0.5mA HIGH-CURRENT OUTPUT DRIVE SUITABLE


    OCR Scan     		PDF L4990 L4990A 100ns DIP16 S016W BCD60II GG772Gh L4990 DG77207 uc3842 AC-DC application L4998 24v dc power supply with uc3842 flyback transfer function 24v to 12v dc power supply with uc3842 CJ 4148 ZENER TI 81W 24v to 5v dc power supply with uc3842 UC3842 application 24V uc3842 dc/dc converter 24v application circuits

    Untitled

    Abstract: No abstract text available
    Text: L4990 L4990A PRIMARY CONTROLLER • ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ CURRENT-MODE CONTROL PWM SWITCHING FREQUENCY UP TO 1MHz LOW START-UP CURRENT < 0.45mA HIGH-CURRENT OUTPUT DRIVE SUITABLE FOR POWER MOSFET 1 A FULLY LATCHED PWM LOGIC WITH DOU­


    OCR Scan     		PDF L4990 L4990A 100ns DIP16 S016W BCD60II L4990

    Untitled

    Abstract: No abstract text available
    Text: r = 7 S G S -T H O M S O N ^ 7 #« L4990 L4990A PRIMARY CONTROLLER • ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ CURRENT-MODE CONTROL PWM SWITCHING FREQUENCY UP TO 1MHz LOW START-UP CURRENT < 0.45mA HIGH-CURRENT OUTPUT DRIVE SUITABLE FOR POWER MOSFET 1 A


    OCR Scan     		PDF L4990 L4990A 100ns DIP16 S016W BCD60II L4990

    Untitled

    Abstract: No abstract text available
    Text: r = 7 S G S -T H O M S O N ^ 7 #« L4990 L4990A PRIMARY CONTROLLER • ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ CURRENT-MODE CONTROL PWM SWITCHING FREQUENCY UP TO 1MHz LOW START-UP CURRENT < 0.45mA HIGH-CURRENT OUTPUT DRIVE SUITABLE FOR POWER MOSFET 1 A


    OCR Scan     		PDF L4990 L4990A 100ns DIP16 S016W BCD60II L4990

    L4998

    Abstract: schematic smps 300W L4990 1N4148 ST TWT Wiring variac used as a battery charger BCD60II L4990A flyback smps battery charger design using ice STPS20100CT
    Text: - , k7 # . L4990 L4990A S G S -T H O M S O N R f f l D t g œ H I L I Ê 'î n S O R Ô D t g S PRIM ARY CO NTRO LLER • ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ . CURRENT-MODE CONTROL PWM SWITCHING FREQUENCY UP TO 1MHz LOW START-UP CURRENT < 0.45mA


    OCR Scan     		PDF L4990 L4990A 100ns DIP16 S016W BCD60II L4998 schematic smps 300W 1N4148 ST TWT Wiring variac used as a battery charger L4990A flyback smps battery charger design using ice STPS20100CT