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UC1844A - Current Mode PWM Controller

Download the UC1844A datasheet PDF. This datasheet also covers the UC1842A variant, as both devices belong to the same current mode pwm controller family and are provided as variant models within a single manufacturer datasheet.

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.

Features

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

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (UC1842A-Unitrode.pdf) that lists specifications for multiple related part numbers.

Datasheet Details

Part number UC1844A
Manufacturer Unitrode
File Size 972.93 KB
Description Current Mode PWM Controller
Datasheet download datasheet UC1844A Datasheet

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Other Datasheets by Unitrode

Part Number Description
UC1841 Programmable Off-Line PWM Controller
UC1842A Current Mode PWM Controller
UC1843A Current Mode PWM Controller
UC1845A Current Mode PWM Controller
UC1823 High Speed PWM Controller

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.

View original datasheet text
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.
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