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UC3843A-BW - Current Mode PWM Controller

This page provides the datasheet information for the UC3843A-BW, a member of the UC3842A-BW Current Mode PWM Controller family.

Description

The UC3842A-BW/43A-BW/44A-BW/45A-BW are fixed frequency current mode PWM controller.

Line and DC to DC converter applications with a minimal external components.

Features

  • Low Start-Up and Operating Current.
  • High Current Totem Pole Output.
  • Undervoltage Lockout With Hysteresis.
  • Operating Frequency Up To 500KHz BLOCK.

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Datasheet preview – UC3843A-BW

Datasheet Details

Part number UC3843A-BW
Manufacturer FCI
File Size 917.76 KB
Description Current Mode PWM Controller
Datasheet download datasheet UC3843A-BW Datasheet
Additional preview pages of the UC3843A-BW datasheet.

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Full PDF Text Transcription

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UC384XA-BW Current Mode PWM Controller (UC3842A-BW/43A-BW/44A-BW/45A-BW) DESCRIPTION The UC3842A-BW/43A-BW/44A-BW/45A-BW are fixed frequency current mode PWM controller. They are specially designed for OFF−Line and DC to DC converter applications with a minimal external components. Internally implemented circuits include a trimmed PIN CONNECTION (TOP VIEW) oscillator for precise duty cycle control, a temperature compensated reference, high gain error amplifier, current sensing comparator, and a high current totempole output ideally suited for driving a power MOSFET. Protection circuitry includes built undervoltage lockout and current limiting. The UC3842A-BW and UC3844A-BW have UVLO thresholds of 16 V (on) and 10 V (off).
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