UC3845D Current Mode PWM Control IC

৳ 90.00

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With 8.4V/7.6V UVLO 50% duty cycle, 0C to 70C.

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The UCx84x series of control integrated circuits provide the features that are necessaryto implement off-line or DC-to-DC fixed-frequency current-mode control schemes, with a minimumnumber of external components. The internally implemented circuits include an undervoltage lockout(UVLO), featuring a start-up current of less than 1 mA, and a precision reference trimmed foraccuracy at the error amplifier input. Other internal circuits include logic to ensure latchedoperation, a pulse-width modulation (PWM) comparator that also provides current-limit control, anda totem-pole output stage that is designed to source or sink high-peak current. The output stage,suitable for driving N-channel MOSFETs, is low when it is in the off state.  The UCx84x family offers a variety of package options, temperature range options, choiceof maximum duty cycle, and choice of turnon and turnoff thresholds and hysteresis ranges. Deviceswith higher turnon or turnoff hysteresis are ideal choices for off-line power supplies, while thedevices with a narrower hysteresis range are suited for DC-DC applications. The UC184x devices arespecified for operation from –55°C to 125°C, the UC284x series is specified for operation from–40°C to 85°C, and the UC384x series is specified for operation from 0°C to 70°C.

Features:

 

  1. Optimized for off-line and DC-to-DC converters
  2. Low start-up current (< 1 mA)
  3. Automatic feedforward compensation
  4. Pulse-by-pulse current limiting
  5. Enhanced load-response characteristics
  6. Undervoltage lockout with hysteresis
  7. Double-pulse suppression
  8. High-current totem-pole output
  9. Internally trimmed bandgap reference
  10. Up to 500-kHz operation
  11. Error amplifier with low output resistance

 

Packing List:

 

  • 1pc * UC3845D Current Mode PWM Control IC

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