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    L4990A Price and Stock

    STMicroelectronics L4990AD

    SWITCHING REGULATOR, CURRENT-MODE, 1.5A, 1000KHZ SWITCHING FREQ-MAX, BCDMOS, PDSO16
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    Quest Components L4990AD 57
    • 1 $9
    • 10 $4.5
    • 100 $3.9
    • 1000 $3.9
    • 10000 $3.9
    		Buy Now

    STMicroelectronics L4990A

    1.5 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDIP16
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    Quest Components L4990A 35
    • 1 $8.1
    • 10 $4.05
    • 100 $4.05
    • 1000 $4.05
    • 10000 $4.05
    		Buy Now

    Others L4990AD

    INSTOCK
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    Chip 1 Exchange L4990AD 327
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    ST-Ericsson L4990A

    INSTOCK
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    Chip 1 Exchange L4990A 38
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    L4990A Datasheets (12)

    Part ECAD Model Manufacturer Description Curated Datasheet Type 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

    L4990A 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

    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

    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

    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

    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

    bc327 pinout

    Abstract: BC337 pinout bc327 equivalent LM339 equivalent 330uF-25V BC327 BC337 noise figure BC327 noise figure LM339 application note T38-52 12v 30A regulator
    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, bc327 pinout BC337 pinout bc327 equivalent LM339 equivalent 330uF-25V BC327 BC337 noise figure BC327 noise figure LM339 application note T38-52 12v 30A regulator

    opto diac

    Abstract: ROE EYS 06 ROE capacitor 1000uF ROE EYS capacitor ROE EYS transistor bc237 bc337 EYS 06 ROE eke capacitor kbubj diac advantage
    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 opto diac ROE EYS 06 ROE capacitor 1000uF ROE EYS capacitor ROE EYS transistor bc237 bc337 EYS 06 ROE eke capacitor kbubj diac advantage

    philips 3f3 ferrite

    Abstract: smps 12 volt 3 amp T2A250V 12v 1a smps circuit diagram L4990 Z8070 BJT 2N2222 datasheet BYT11-600 l4990a schematic smps 300W
    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 smps 12 volt 3 amp T2A250V 12v 1a smps circuit diagram L4990 Z8070 BJT 2N2222 datasheet BYT11-600 l4990a schematic smps 300W

    philips 3f3 ferrite

    Abstract: 1N4148 ST bjt 2n2222 driver circuit ac-dc adapter L4990A npn bjt 2N2222 bjt 2n2222 flyback smps 300w e cores transformer ST 2n2222 BCD60II
    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 philips 3f3 ferrite 1N4148 ST bjt 2n2222 driver circuit ac-dc adapter L4990A npn bjt 2N2222 bjt 2n2222 flyback smps 300w e cores transformer ST 2n2222 BCD60II

    opto diac

    Abstract: ROE EYS 06 ROE capacitor 1000uF BC237 L4990A transistor bc237 - bc337 ROE capacitor EYS switching transformer 300w ETD39 24v AN-890
    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 opto diac ROE EYS 06 ROE capacitor 1000uF BC237 L4990A transistor bc237 - bc337 ROE capacitor EYS switching transformer 300w ETD39 24v AN-890

    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

    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

    L4998

    Abstract: b/w tv schematics smps circuit diagram of 300W variac used as a battery charger 12 VOLT 10 AMP smps circuit diagrams flyback smps 300w e cores transformer gate drive circuit for interleaved active clamp flyback forward converter L4990 btw 70.200 transistor ge c137
    Text: T L4990 L4990A / PR IM AR Y C O N TR O LLER • ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ . 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 DOU­


    OCR Scan     		PDF L4990 L4990A 100ns DIP16 S016W BCD60II L4998 b/w tv schematics smps circuit diagram of 300W variac used as a battery charger 12 VOLT 10 AMP smps circuit diagrams flyback smps 300w e cores transformer gate drive circuit for interleaved active clamp flyback forward converter btw 70.200 transistor ge c137

    L4998

    Abstract: flyback smps battery charger design using ice Switching mode power adaptor 12v 0,5a CB 4925 B equivalent ic flyback transformer philips TV 29 inch philips 3f3 ferrite btw 70.200 transistor schematic smps 300W L4990 L4990A
    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 flyback smps battery charger design using ice Switching mode power adaptor 12v 0,5a CB 4925 B equivalent ic flyback transformer philips TV 29 inch philips 3f3 ferrite btw 70.200 transistor schematic smps 300W L4990A

    24v to 12v dc power supply with uc3842

    Abstract: 24v dc power supply with uc3842 EFD25-3F3 BCD60II L4990 L4990A 24v to 5v dc power supply with uc3842 S6NF
    Text: 5 S G S -1 H 0 M S 0 N IIUIiBTTMIffllKSi^ Ï. L4990 L4990A PRIMARY CONTROLLER PRODUCT PREVIEW • ■ ■ ■ ■ . . . ■ ■ . . . ■ CURRENT-MODE CONTROL PWM SWITCHING FREQUENCY UP T 0 1MHz LOW START-UP CURRENT < 0.5mA HIGH-CURRENT OUTPUT DRIVE SUITABLE


    OCR Scan     		PDF L4990 L4990A 100ns DIP16 S016W BCD60II 00b7flll 24v to 12v dc power supply with uc3842 24v dc power supply with uc3842 EFD25-3F3 L4990A 24v to 5v dc power supply with uc3842 S6NF