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UC3844D1 Datasheet

Part Number UC3844D1
Manufacturers Fairchild Semiconductor
Logo Fairchild Semiconductor
Description SMPS Controller
Datasheet UC3844D1 DatasheetUC3844D1 Datasheet (PDF)

www.fairchildsemi.com UC3842/UC3843/UC3844/UC3845 SMPS Controller Features • • • • Low Start up Current Maximum Duty Clamp UVLO With Hysteresis Operating Frequency up to 500KHz Description The UC3842/UC3843/UC3844/UC3845 are fixed frequencycurrent-mode PWM controller. They are specially designed for Off-Line and DC to DC converter applications with minimum external components. These integrated circuits feature a trimmed oscillator for precise duty cycle control, a temperature compensated refer.

  UC3844D1   UC3844D1






Part Number UC3844D
Manufacturers ON Semiconductor
Logo ON Semiconductor
Description HIGH PERFORMANCE CURRENT MODE CONTROLLERS
Datasheet UC3844D1 DatasheetUC3844D Datasheet (PDF)

UC3844, UC3845, UC2844, UC2845 High Performance Current Mode Controllers The UC3844, UC3845 series are high performance fixed frequency current mode controllers. They are specifically designed for Off−Line and DC−to−DC converter applications offering the designer a cost effective solution with minimal external components. These integrated circuits feature an oscillator, a temperature compensated reference, high gain error amplifier, current sensing comparator, and a high current totem pole outpu.

  UC3844D1   UC3844D1







Part Number UC3844D
Manufacturers Motorola
Logo Motorola
Description HIGH PERFORMANCE CURRENT MODE CONTROLLERS
Datasheet UC3844D1 DatasheetUC3844D Datasheet (PDF)

Order this document by UC3844/D UC3844, 45 UC2844, 45 High Performance Current Mode Controllers The UC3844, UC3845 series are high performance fixed frequency current mode controllers. They are specifically designed for Off–Line and dc–to–dc converter applications offering the designer a cost effective solution with minimal external components. These integrated circuits feature an oscillator, a temperature compensated reference, high gain error amplifier, current sensing comparator, and a high .

  UC3844D1   UC3844D1







Part Number UC3844D
Manufacturers STMicroelectronics
Logo STMicroelectronics
Description CURRENTMODE PWM CONTROLLER
Datasheet UC3844D1 DatasheetUC3844D Datasheet (PDF)

® UC2842/3/4/5 UC3842/3/4/5 CURRENT MODE PWM CONTROLLER . . . . . . . . . . . OPTIMIZED FOR OFF-LINE AND DC TO DC CONVERTERS LOW START-UP CURRENT (< 1 mA) AUTOMATIC FEED FORWARD COMPENSATION PULSE-BY-PULSE CURRENT LIMITING ENHANCED LOAD RESPONSE CHARACTERISTICS UNDER-VOLTAGE LOCKOUT WITH HYSTERESIS DOUBLE PULSE SUPPRESSION HIGH CURRENT TOTEM POLE OUTPUT INTERNALLY TRIMMED BANDGAP REFERENCE 500 KHz OPERATION LOW RO ERROR AMP Minidip SO14 DESCRIPTION TheUC3842/3/4/5family of controlICs provi.

  UC3844D1   UC3844D1







Part Number UC3844D
Manufacturers Fairchild Semiconductor
Logo Fairchild Semiconductor
Description SMPS Controller
Datasheet UC3844D1 DatasheetUC3844D Datasheet (PDF)

www.fairchildsemi.com UC3842/UC3843/UC3844/UC3845 SMPS Controller Features • • • • Low Start up Current Maximum Duty Clamp UVLO With Hysteresis Operating Frequency up to 500KHz Description The UC3842/UC3843/UC3844/UC3845 are fixed frequencycurrent-mode PWM controller. They are specially designed for Off-Line and DC to DC converter applications with minimum external components. These integrated circuits feature a trimmed oscillator for precise duty cycle control, a temperature compensated refer.

  UC3844D1   UC3844D1







SMPS Controller

www.fairchildsemi.com UC3842/UC3843/UC3844/UC3845 SMPS Controller Features • • • • Low Start up Current Maximum Duty Clamp UVLO With Hysteresis Operating Frequency up to 500KHz Description The UC3842/UC3843/UC3844/UC3845 are fixed frequencycurrent-mode PWM controller. They are specially designed for Off-Line and DC to DC converter applications with minimum external components. These integrated circuits feature a trimmed oscillator for precise duty cycle control, a temperature compensated reference, high gain error amplifier, current sensing comparator and a high current totempole output for driving a Power MOSFET. The UC3842 and UC3844 have UVLO thresholds of 16V (on) and 10V (off). The UC3843 and UC3845 are 8.5V(on) and 7.9V (off). The UC3842 and UC3843 can operate within 100% duty cycle. The UC3844 and UC3845 can operate with 50% duty cycle. 8-DIP 8-SOP 1 1 14-SOP 1 Internal Block Diagram * NORMALLY 8DIP/8SOP PIN NO. * ( ) IS 14SOP PINNO. * TOGGLE FLIP FLOP USED ONLY IN UC3844, UC3845 Rev. 1.0.1 ©2002 Fairchild Semiconductor Corporation UC3842/UC3843/UC3844/UC3845 Absolute Maximum Ratings Parameter Supply Voltage Output Current Analog Inputs (Pin 2.3) Error Amp Output Sink Current Power Dissipation at TA≤25°C (8DIP) Power Dissipation at TA≤25°C (8SOP) Power Dissipation at TA≤25°C (14SOP) Storage Temperature Range Lead Temperature (Soldering, 10sec) Symbol VCC IO V(ANA) ISINK (E.A) PD(Note1,2) PD(Note1,2) PD(Note1,2) TSTG TLEAD Value 30 ±1 -0.3 to 6.3 10 1200 460 .


2005-04-04 : TSC14    SN76002ND    MHW3628    EP2015CN    UC3844D    UC3844D    UC3844D    UC3844D    UC3844D1    SSP4N60B   


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