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UC3842A - Current Mode PWM Controller

General Description

The UC1842A/3A/4A/5A family of control ICs is a pin for pin compatible improved version of the UC3842/3/4/5 family.

Key Features

  • Optimized for Off-line and DC to DC Converters.
  • Low Start Up Current (.

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Datasheet Details

Part number UC3842A
Manufacturer Unitrode
File Size 972.93 KB
Description Current Mode PWM Controller
Datasheet download datasheet UC3842A Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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Current Mode PWM Controller application INFO available UC1842A/3A/4A/5A UC2842A/3A/4A/5A UC3842A/3A/4A/5A 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 DESCRIPTION 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.