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Home > Semiconductors > Power Management ICs > Switching Converters, Regulators & Controllers > UNITRODE UC3842AN IC PWM Current Controller 1A PDIP-8

UNITRODE UC3842AN IC PWM Current Controller 1A PDIP-8

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Quick Overview

Unitrode - Unitrode Uc3842An 140076 IC Current Mode PWM Controller 1A 8-Pin PDIP Rail

UNITRODE UC3842AN IC PWM Current Controller 1A PDIP-8

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Details

UNITRODE UC3842AN Texas Instruments High Performance Current Mode PWM Controller, Single Output, Switching Controller 1A 30V, DIP-8 , Through Hole

The UC1842A/3A/4A/5A family of control ICs is a pin for pin compatible improved version of the UC3842/3/4/5 family. Providing the necessary features to control current mode switched mode power supplies, this family has the following improved features. Start up current is guaranteed to be less than 0.5mA. Oscillator discharge is trimmed to 8.3mA. During under voltage lockout, the output stage can sink at least 10mA at less than 1.2V for VCC over 5V.

Features

  • Optimized for Off-line and DC to DC Converters
  • Low Start Up Current (<0.5mA)
  • Trimmed Oscillator Discharge Current
  • 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
  • 500kHz Operation
  • Low RO Error Amp
The UC3842AN is a Current Mode PWM Controller optimized for off-line and DC to DC converters. Providing the necessary features to control current mode switched mode power supplies, this controller has the following improved features. Start up current is guaranteed to be less than 0.5mA. Oscillator discharge is trimmed to 8.3mA. During under-voltage lockout, the output stage can sink at least 10mA at less than 1.2V for VCC over 5V.
  • Optimized for off-line and DC to DC converters
  • Low start up current (<0.5mA)
  • Trimmed oscillator discharge current
  • 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

Additional Information

UC3842
Manufacturer: Unitrode Semiconductor (Acquired by Texas Instruments)
Product Category: Switching Controllers
Brand: Unitrode
Topology: Buck, Boost, Flyback, Forward
Number of Outputs: 1 Output
Switching Frequency: 450 kHz
Duty Cycle - Max: 100 %
Output Current: 1000 mA
Maximum Operating Temperature: + 70 C
Mounting Style: Through Hole
Package / Case: PDIP-8
Packaging: Tube
Rise / Fall Time: 50 ns
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