TEXAS INSTRUMENTS  UC3844N  CURRENT MODE PWM CONTROLLER, 25V, 8-DIP

TEXAS INSTRUMENTS UC3844N

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Product Overview


The UC3844N is a Current Mode PWM Controller optimized for off-line and DC to DC converters. This device provides the necessary features to implement off-line or DC-to-DC fixed frequency current mode control schemes with a minimal external parts count. Internally implemented circuits include under-voltage lockout featuring start up current less than 1mA, a precision reference trimmed for accuracy at the error amp input, logic to insure latched operation, a PWM comparator which also provides current limit control and a totem pole output stage designed to source or sink high peak current. The output stage, suitable for driving N-channel MOSFETs, is low in the off state.
  • Optimized for off-line and DC to DC converters
  • Low start up current (<1mA)
  • 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
  • Green product and no Sb/Br

Applications

Power Management
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Product Specifications, Documents & More


  • Input Voltage 25V
  • Output Voltage 13.5V
  • Output Current 1A
  • Supply Voltage Min 12V
  • Supply Voltage Max 25V
  • Controller IC Case Style DIP
  • No. of Pins 8Pins
  • Frequency 450kHz
  • Operating Temperature Min 0°C
  • Operating Temperature Max 70°C
  • Packaging Each
  • Power Dissipation Pd 1 W
  • MSL -
  • Supply Voltage Range 12V to 25V
  • SVHC No SVHC (15-Jun-2015)
  • Digital IC Case Style DIP

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  • CAD CadSoft_EAGLE (2.56KB) EN
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    Availability:  317


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    Substitutes


      Newark Part No. Manufacturer Part No Manufacturer / Description
    Avail Price Qty
    ascdsc ascdsc ascdsc ascdsc ascdsc
    Exact
    89K1264
    UC3844BN

    UC3844BN

    STMICROELECTRONICS

    CURRENT MODE PWM CONTROLLER, 30V, 8-DIP

    Availability:​ 0

    Pricing is unavailable. Please contact customer services.

      More stock available week commencing 7/4/16

    Not Normally Stocked

    Non-Cancelable / Non Returnable

    24M1676
    UC3845BN

    UC3845BN

    STMICROELECTRONICS

    IC, PWM CONTROLLER, 3845, DIP8

    Availability:​ 668  

    Price for: Each

    1+ $0.857 10+ $0.70 25+ $0.453 50+ $0.336

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    Freight Charge: $20.00 once per order

    Delivery in 5-7 days for in stock items

    More stock available week commencing 7/25/16
    Suggested Substitutes
    76C9251
    TL3844P

    TL3844P

    TEXAS INSTRUMENTS

    CURRENT MODE PWM CONTROLLER, 25V, 8-DIP

    Availability:​ 123  

    Price for: Each

    1+ $1.02 10+ $0.871 100+ $0.671 500+ $0.593

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    see cut-off times

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