The Datasheet Archive

Top Results (6)

Part Manufacturer Description Datasheet Download Buy Part
LT1172CT#31 Linear Technology IC IC,SMPS CONTROLLER,CURRENT-MODE,BIPOLAR,ZIP,5PIN,PLASTIC, Switching Regulator or Controller
LT1172MJ8#PBF Linear Technology IC IC,SMPS CONTROLLER,CURRENT-MODE,BIPOLAR,DIP,8PIN,CERAMIC, Switching Regulator or Controller
LTC4416IMS#TR Linear Technology IC 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO10, PLASTIC, MSOP-10, Power Management Circuit
LTC2990IMS#TR Linear Technology IC 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO10, PLASTIC, MSOP-10, Power Management Circuit
LTC6104HMS8#TR Linear Technology IC 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8, PLASTIC, MSOP-8, Power Management Circuit
LTC2913HMS-1 Linear Technology IC 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO10, PLASTIC, MSOP-10, Power Management Circuit

uc3844 smps power supply Datasheets Context Search

Catalog Datasheet MFG & Type PDF Document Tags
2002 - uc3845 application smps

Abstract:
Text: www.fairchildsemi.com UC3842/UC3843/ UC3844 /UC3845 SMPS Controller Features · · · · Low Start , driving a Power MOSFET. The UC3842 and UC3844 have UVLO thresholds of 16V (on) and 10V (off). The UC3843 , Gain Power Supply Rejection Ratio Output Sink Current Output Source Current High Output Voltage Low Output Voltage CURRENT SENSE SECTION Gain Maximum Input Signal Power Supply Rejection Ratio Input Bias , Fairchild P/N UC3844 - SMPS Controller SEARCH | Parametric | Cross Reference space Fairchild


Original
PDF UC3842/UC3843/UC3844/UC3845 500KHz UC3842/UC3843/UC3844/UC3845 UC3842 UC3844 UC3843 UC3845 uc3845 application smps SMPS CIRCUIT DIAGRAM UC3842 uc3844 smps power supply uc3843 dc dc converter UC3842 smps design uc3844 reference smps UC3842 smps diagram UC3844 application note
2001 - supertex AN-H29

Abstract:
Text: shows a simplified typical configuration of a switch mode power supply , SMPS , using the Supertex LR7 in the startup circuit. The Supertex LR7 is a high voltage switch mode power supply start-up circuit , voltage to power the PWM IC after start-up. The LR7 is used to supply power for the PWM IC only during start-up. After start-up, the LR7 turns off and the auxiliary winding is used to supply power for the PWM , LR7 GND VOUT VCC PWM IC UC3844 C1 Figure 1: Simplified SMPS using LR7 3 LR745


Original
PDF LR745 O-243AA: O-243AA* LR745N3 LR745N8 OT-89. 240VAC UC3844 supertex AN-H29 T flip flop IC uc3844 transformer design uc3844 smps power supply SMPS CIRCUIT DIAGRAM for computers uc3844 PWM power supply application note 12 v transistor flip flop transistor marking code 1325 5v power supply with uc3844 computer smps circuit diagram
2002 - uc3842

Abstract:
Text: www.fairchildsemi.com UC3842/UC3843/ UC3844 /UC3845 SMPS Controller Features · · · · Low Start , driving a Power MOSFET. The UC3842 and UC3844 have UVLO thresholds of 16V (on) and 10V (off). The UC3843 , Gain Power Supply Rejection Ratio Output Sink Current Output Source Current High Output Voltage Low Output Voltage CURRENT SENSE SECTION Gain Maximum Input Signal Power Supply Rejection Ratio Input Bias , The UC3842/UC3843/ UC3844 /UC3845 are fixed frequencycurrent-mode PWM controller. They are specially


Original
PDF UC3842/UC3843/UC3844/UC3845 500KHz UC3842/UC3843/UC3844/UC3845 UC3842 UC3844 UC3843 UC3845 12v dc power supply with uc3845 uc3845 application smps uc3843 dc dc converter uc3844 smps power supply uc3845 reference smps application notes uc3842
2008 - computer smps circuit diagram

Abstract:
Text: configuration of a switchmode power supply , SMPS , using the Supertex LR745 in the start-up circuit. The , Very low power consumption after start-up The Supertex LR745 is a high input voltage SMPS startup , LR745 is a high voltage, switch-mode power supply start-up circuit which has 3 terminals: VIN, GND, and , LR745 is used to supply power for the PWM IC only during start-up. After start-up, the LR745 turns off and the auxiliary winding is used to supply power for the PWM IC. Figure 2 shows the typical current


Original
PDF LR745 LR745 240VAC DSFP-LR745 B123008 computer smps circuit diagram uc3844 transformer design uc3844 smps power supply T flip flop IC 24 volts smps uc3844 reference smps smps 12 volt LR745N3 SMPS CIRCUIT DIAGRAM USING TRANSISTORS smps 12v to 16v
2008 - uc3844 transformer design

Abstract:
Text: Figure 1 shows a simplified typical configuration of a switchmode power supply , SMPS , using the Supertex , www.supertex.com 2 LR745 The Supertex LR745 is a high voltage, switch-mode power supply start-up circuit which , , Unitrode part # UC3844 . An auxiliary winding on the transformer is used to generate a VCC voltage to power the PWM IC after start-up. The LR745 is used to supply power for the PWM IC only during start-up. After start-up, the LR745 turns off and the auxiliary winding is used to supply power for the PWM IC


Original
PDF LR745 240VAC DSFP-LR745 B091208 uc3844 transformer design uc3844 reference smps B0912 T flip flop IC UC3844 application uc3844 transformer
2013 - Not Available

Abstract:
Text: to generate a VCC voltage to power the PWM IC after start-up. The LR745 is used to supply power for , used to supply power for the PWM IC. Figure 2 shows the typical current and voltage waveforms at , high voltage, switch-mode power supply start-up circuit which has 3 terminals: VIN, GND, and VOUT. An , . Typical Application Figure 1 shows a simplified typical configuration of a switchmode power supply , 13.25V under minimum load conditions. Consider an SMPS that is required to power small as well as large


Original
PDF LR745 LR745 240VAC DSFP-LR745 C080113
2001 - T flip flop pin configuration

Abstract:
Text: configuration of a switch mode power supply , SMPS , using the Supertex LR7 in the startup circuit. The LR7's VOUT , LR745 Block Diagram Detailed Description The Supertex LR7 is a high voltage switch mode power supply , transformer is used to generate a VCC voltage to power the PWM IC after start-up. The LR7 is used to supply , is used to supply power for the PWM IC. Figure 2 shows the typical current and voltage waveforms at , an SMPS that is required to power small as well as large loads and is also required to power up


Original
PDF LR745 LR745N3 O-243AA* LR745N8 O-243AA: OT-89. 240VAC UC3844 T flip flop pin configuration transistor marking code 1325 uc3844 transformer design
2007 - T flip flop IC

Abstract:
Text: Figure 1 shows a simplified typical configuration of a switchmode power supply , SMPS , using the Supertex , GND + comp2 ­ R3 2 LR745 The Supertex LR745 is a high voltage, switch-mode power supply , , Unitrode part # UC3844 . An auxiliary winding on the transformer is used to generate a VCC voltage to power the PWM IC after start-up. The LR745 is used to supply power for the PWM IC only during start-up. After start-up, the LR745 turns off and the auxiliary winding is used to supply power for the PWM IC


Original
PDF LR745 240VAC DSPD-3TO92N3, D070808. LR745 O-243AA OT-89) T flip flop IC T flip flop IC no uc3844 transformer uc3844 transformer design
1996 - uc3844 transformer design

Abstract:
Text: configuration of a switch mode power supply , SMPS , using the Supertex LR7 in the startup circuit. The LR7's VOUT , power consumption after start-up General Description The Supertex LR7 is a high input voltage SMPS , LR745 Block Diagram Detailed Description The Supertex LR7 is a high voltage switch mode power supply , transformer is used to generate a VCC voltage to power the PWM IC after startup. The LR7 is used to supply , is used to supply power for the PWM IC. Figure 2 shows the typical current and voltage waveforms at


Original
PDF LR745 LR745N3 O-243AA LR745N8 LR745ND OT-89. AN-H28. UC3844 uc3844 transformer design p024 ZENER DIODE uc3844 14 pin ic configuration uc3844 transformer T flip flop IC uc3844 reference smps switch mode power supply using uc3844 uc3844 smps power supply p023 transistor UC3844 application
1996 - computer smps circuit diagram

Abstract:
Text: shows a simplified typical configuration of a switch mode power supply , SMPS , using the Supertex LR7 in the startup circuit. The Supertex LR7 is a high voltage switch mode power supply start-up circuit , VCC voltage to power the PWM IC after startup. The LR7 is used to supply power for the PWM IC only during start-up. After start-up, the LR7 turns off and the auxiliary winding is used to supply power , LR7 GND VOUT VCC PWM IC UC3844 C1 Figure 1: Simplified SMPS using LR7 14-7 14


Original
PDF LR745 O-243AA LR745N3 LR745N8 LR745ND OT-89. AN-H28. UC3844 computer smps circuit diagram uc3844 smps power supply PWM IC 14 PIN smps circuit diagram uc3844 PWM power supply application note T flip flop IC 24 volts smps uc3844 14 pin ic configuration uc3844 transformer design uc3844 reference smps
1998 - T flip flop IC

Abstract:
Text: supply , SMPS , using the Supertex LR7 in the startup circuit. The Supertex LR7 is a high voltage switch mode power supply start-up circuit, which has 3 terminals: VIN, GND, and VOUT. An input voltage range , transformer is used to generate a VCC voltage to power the PWM IC after startup. The LR7 is used to supply , is used to supply power for the PWM IC. Figure 2 shows the typical current and voltage waveforms at , SMPS may power up too fast with a small load, not allowing the VCC voltage to fall below 13.25V. For


Original
PDF LR745 O-243AA* LR745N3 LR745N8 OT-89. 240VAC UC3844 T flip flop IC uc3844 smps power supply SMPS CIRCUIT DIAGRAM for computers computer smps circuit diagram SMPS, Computers, CIRCUIT DIAGRAM SMPS CIRCUIT DIAGRAM USING TRANSISTORS uc3844 reference smps PWM IC ic LOW POWER OFF LINE SMPS smps ic 8 pin
1998 - T flip flop IC

Abstract:
Text: supply , SMPS , using the Supertex LR7 in the startup circuit. The Supertex LR7 is a high voltage switch mode power supply start-up circuit, which has 3 terminals: VIN, GND, and VOUT. An input voltage range , transformer is used to generate a VCC voltage to power the PWM IC after startup. The LR7 is used to supply , is used to supply power for the PWM IC. Figure 2 shows the typical current and voltage waveforms at , fall below 13.25V under minimum load conditions. Consider an SMPS that is required to power small as


Original
PDF LR745 O-243AA* LR745N3 LR745N8 LR745ND OT-89. 240VAC thrC3844 UC3844 T flip flop IC SMPS CIRCUIT DIAGRAM for computers supertex AN-H29 uc3844 transformer design LR745N8 LR745N3 LR745 6 pin smps IC UC3844 uc3844 applications
1998 - uc3844 PWM power supply application note

Abstract:
Text: connected to the VCC line of a PWM IC, Unitrode part # UC3844 . The LR7 is used to supply power for the PWM , supply power for the load. EAUX = = VIN LR7 VOUT VCC VREF PWM IC UC3844 GND 1 ( 2 , this approach by consuming negligible power after the SMPS has started. The circuit in Figure 1 is an , Unitrode UC3844 PWM IC during start-up. The commonly used approach utilizes a power resistor and a zener , 1.0 Figure 1: SMPS with LR7 start-up 3-90 LR Series Applications The worse case power


Original
PDF AN-D25 AN-H28. voltage58 uc3844 PWM power supply application note UC3844N 3 watt 70v zener diode 3 watt smps circuit supertex AN-H29 uc3844 reference smps SMPS CIRCUIT DIAGRAM for computers UC3844 application note 5v pc smps pwm design smps 12v to 16v
2001 - UC3842 smps design

Abstract:
Text: www.fairchildsemi.com UC3842/UC3843/ UC3844 /UC3845 SMPS Controller Features Description · · · · The UC3842/UC3843/ UC3844 /UC3845 are fixed frequency current-mode PWM controller. They , 4V 65 90 - dB Power Supply Rejection Ratio PSRR 12V VCC 25V 60 70 - , Maximum Input Signal VI(MAX) Power Supply Rejection Ratio PSRR Input Bias Current 12V VCC , totempole output Ideally suited for driving a power MOSFET. Protection circuity Includes built in


Original
PDF UC3842/UC3843/UC3844/UC3845 UC3842/UC3843/UC3844/UC3845 TheUC3842 UC3844 UC3843 UC3845 UC3842 smps design UC3843 application note uc3844 smps power supply UC3844 application note uc3845 smps UC3845 application note uc3845 PWM power supply application note UC3842 mosfet driver uc3845 application smps 5v power supply with uc3842
A773* Transistor

Abstract:
Text: typical configuration of a switch mode power supply , SMPS , using the Supertex LR7 in the start­ up circuit. The Supertex LR7 is a high voltage switch mode power supply start-up circuit, which has 3 , voltage to power the PWM IC after start­ up. The LR7 is used to supply power for the PWM IC only during start-up. After start-up, the LR7 turns off and the auxiliary winding is used to supply power for the PWM , an SMPS that is required to power small as well as large loads and is also required to power up


OCR Scan
PDF LR745 O-243AA LR745N3 LR745N8 LR745ND OT-89. AN-H28. rectif844 0Q0M71fl A773* Transistor
2001 - UC3844N

Abstract:
Text: PWM IC, Unitrode part # UC3844 . The LR7 is used to supply power for the PWM IC only during startup , supply power for the load. EAUX = = VIN LR7 VOUT VCC VREF PWM IC UC3844 GND 1 , replaces this approach by consuming negligible power after the SMPS has started. The circuit in Figure 1 , voltage for the Unitrode UC3844 PWM IC during start-up. The commonly used approach utilizes a power , )(1.414)V/(1.0mA + 100µA) R = 154K Operating the power supply from rectified 240VAC, R will dissipate


Original
PDF AN-D25 AN-H28. UC3844N uc3844 smps power supply SMPS CIRCUIT DIAGRAM for computers supertex AN-H29 transistor smps high voltage 5v pc smps pwm design uc3844 PWM power supply application note smps 12v to 16v UC3844 application note uc3844 reference smps
T flip flop IC

Abstract:
Text: Application Figure 1 shows a sim plified typical configuration of a switch mode power supply , SMPS , using the , Detailed Description The Supertex LR7 is a high voltage switch mode power supply start-up circuit, which , , Unitrode part # UC3844 . An auxiliary winding on the transform er is used to generate a Vcc voltage to power the PWM IC after start up. The LR7 is used to supply power for the PWM IC only during start-up. After start-up, the LR7 turns off and the auxiliary winding is used to supply power for the PWM IC. Figure 2


OCR Scan
PDF LR745N3 O-243AA LR745N8 LR745ND AN-H28. UC3844 T flip flop IC T flip flop IC no T flip flop pin configuration T flip flop ic number uc3844 PWM power supply application note
Not Available

Abstract:
Text: Typical Application Figure 1 shows a sim plified typical configuration of a switch mode power supply , mode power supply start-up circuit, which has 3 term inals: V,N, GND, and V0UT. An input voltage , LR7 is used to supply power for the PWM IC only during start-up. After start-up, the LR7 turns off and the auxiliary winding is used to supply power for the PWM IC. Figure 2 shows the typical current , SMPS may power up too fast with a small load, not allowing the Vcc voltage to fall below 13.25V. For


OCR Scan
PDF LR745 O-243AA* LR745N3 LR745N8 AN-H28 AN-H29. UC3844
2002 - 12v dc power supply with uc3845

Abstract:
Text: www.fairchildsemi.com UC3842/UC3843/ UC3844 /UC3845 SMPS Controller Features Description · , output for driving a Power MOSFET. The UC3842 and UC3844 have UVLO thresholds of 16V (on) and 10V (off , /UC3843/ UC3844 /UC3845 Absolute Maximum Ratings Parameter Symbol Value Unit Supply Voltage , (Note3) 65 90 - dB Power Supply Rejection Ratio PSRR 12V VCC 25V (Note3) 60 , (MAX) Power Supply Rejection Ratio PSRR Input Bias Current 12V VCC 25V (Note 1,3


Original
PDF UC3842/UC3843/UC3844/UC3845 UC3842/UC3843/UC3844/UC3845 UC3842 UC3844 UC3843 UC3845 12v dc power supply with uc3845 uc3843 dc dc converter UC3845 dc dc applications UC3842 smps design uc3845 smps UC3844 application note uc3843 dc 5v UC3843 application note
2000 - uc3842 circuit diagram

Abstract:
Text: www.fairchildsemi.com UC3842/UC3843/ UC3844 /UC3845 SMPS Controller Features Description · · · · The UC3842/UC3843/ UC3844 /UC3845 are fixed frequency current-mode PWM controller. They , Voltage Gain VI(E>A) GVO V1 = 2.5V Power Supply Rejection Ratio PSRR 12V VCC 25V 60 , totempole output Ideally suited for driving a power MOSFET. Protection circuity Includes built in under-voltage lockout and current limiting. TheUC3842 and UC3844 have UVLO thresholds of 16V (on) and 10V (off


Original
PDF UC3842/UC3843/UC3844/UC3845 UC3842/UC3843/UC3844/UC3845 TheUC3842 UC3844 UC3843 UC3845 uc3842 circuit diagram UC3842 mosfet driver UC3842 uc3844 smps power supply uc3844 reference smps uc3845 smps SMPS CIRCUIT DIAGRAM UC3842 power supply with uc3842 with circuit diagram uc3845 applications
2015 - Not Available

Abstract:
Text: a switch mode power supply , SMPS , using LR745 in the start-up circuit. LR745’s VOUT terminal is , €¢ Very low power consumption after start-up LR745 is a high input voltage SMPS start-up circuit , Q R D CLK Clock comp1 + R3 GND LR745 is a high voltage, switch-mode power supply , C1 too large will cause the SMPS to power up too slowly. However, if too small, C1 will not allow the SMPS to power up due to insufficient charge in the capacitor to power the IC and MOSFET until


Original
PDF LR745 LR745 240VAC DS20005394A-page
p024 ZENER DIODE

Abstract:
Text: Application Figure 1 shows a simplified typical configuration of a switch mode power supply , SMPS , using the , Block Diagram Detailed Description The Supertex LR7 is a high voltage switch mode power supply start-up , . Consider an SMPS that is required to power small as well as large loads and is also required to power up quickly. Such as SMPS may power up too fast with a small load, not allowing the Vcc voltage to fall below , Sizing the Vcc capacitor, C 1, is an important factor. Making C1 too large will cause the SMPS to power


OCR Scan
PDF LR745N3 O-243AA LR745N8 LR745ND OT-89. AN-H28. p024 ZENER DIODE
1996 - uc38458

Abstract:
Text: Total Power Supply and Zener Current Power Dissipation and Thermal Characteristics D Suffix, Plastic , VFB IIB Unity Gain Bandwidth (TJ = 25°C) AVOL BW Power Supply Rejection Ratio (VCC = 12 V , Voltage Gain (Notes 4 & 5) Maximum Current Sense Input Threshold (Note 4) Power Supply Rejection Ratio , Maximum Minimum % DCmax DCmin TOTAL DEVICE Power Supply Current (Note 2) Startup: (VCC = 6.5 V for UCX845A, (VCC 14 V for UCX844) Operating Power Supply Zener Voltage (ICC = 25 mA) ICC mA


Original
PDF UC3844/D UC3844, UC2844, UC3845 UC3844/D* uc38458 forward converter uc3844 UC3844 flyback application note UC3844 UC3845 application note UC3845 dc dc applications pin connections UC3844 uc3844 applications isolated feedback uc2844 boost uc3844 application note
UC3645

Abstract:
Text: 1 'I'lb 3-769 UC3844 , 45 UC2844, 45 MAXIMUM RATINGS Rating Total Power Supply and , = 2.0 V to 4.0 V) Unity Gain Bandwidth (T j = 25°C) Power Supply Rejection Ratio (V c c = 12 V to 25 , (Note 4) Power Supply Rejection Ratio V c c = 12 V to 25 V (Note 4) Input Bias Current Propagation Delay , Minimum TOTAL DEVICE Power Supply Current (Note 2) Startup: ( V c c = 6-5 V for UCX845A, 14 V for UCX844) Operating Power Supply Zener Voltage (Iq q = 25 mA) V 1.1 150 150 ns ns tr `f - - Vth 15 7.8


OCR Scan
PDF UC3844, UC2844, UC3845 b3b72S3 UC3645 isolated feedback uc2844 boost uc3844 application note forward converter uc3844 8pin ic 3773 uc3844 transformer 3773 8PIN EC35-3C8 UC3844 flyback application note scr transformer drive gate uc2844
2004 - PIN CONFIGURATION OF IC uc3845

Abstract:
Text: normally connected to the switching power supply output through a resistor divider. information to , ABSOLUTE MAXIMUM RATINGS (Ta=25°C ) PARAMETER Total Power Supply and Zener Current Output Current, Source , (Note 4 & 5) Maximum Current Sense Input Threshold (Note 4) Power Supply Rejection Ratio Input Bias , Cycle Maximum Minimum TOTAL DEVICE Power Supply Current (Note 2) Power Supply Zener Voltage NOTE , UTC UC3844 /45 LINEAR INTEGRATED CIRCUIT HIGH PERFORMANCE CURRENT MODE CONTROLLERS DESCRIPTION


Original
PDF UC3844/45 UC3844 UC3845 QW-R103-001 PIN CONFIGURATION OF IC uc3845 forward converter uc3844 UC3845 DIP8 switch mode power supply using uc3844 of ic uc3845 uc3844 45 uc3845 applications
Supplyframe Tracking Pixel