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UTC3843A - PWM Controller

Download the UTC3843A datasheet PDF. This datasheet also covers the UTC3842A variant, as both devices belong to the same pwm controller family and are provided as variant models within a single manufacturer datasheet.

General Description

The UTC UC3842A/3843A provide the necessary functions to implement off-line or DC to DC fixed frequency current mode , controlled switching circuits with a minimal external part count SOP-8

Key Features

  • Low external part count.
  • Low start up current ( Typical 0.12mA ).
  • Automatic feed forward compensation.
  • Pulse-by-Pulse current limiting.
  • Under-voltage lockout with hysteresis.
  • Double pulse Suppression.
  • High current totem pole output to drive MOSFET directly.
  • Internally trimmed band gap reference.
  • 500kHz operation DIP-8 BLOCK.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (UTC3842A_UNISONICTECHNOLOGIES.pdf) that lists specifications for multiple related part numbers.

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Other Datasheets by Unisonic Technologies

Part Number Description
UTC3842A PWM Controller
UTC31001 TELEPHONE TONE RINGER
UTC31002 TELEPHONE TONE RINGER
UTC31002A TELEPHONE TONE RINGER
UTC3414 SINGLE-SUPPLY DUAL HIGH CURRENT OPERATIONAL AMPLIFIER

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
DataSheet.in UTC UC3842A / 3843A LINEAR INTEGRATED CIRCUIT CURRENT MODE PWM CONTROL CIRCUITS DESCRIPTION The UTC UC3842A/3843A provide the necessary functions to implement off-line or DC to DC fixed frequency current mode , controlled switching circuits with a minimal external part count SOP-8 FEATURES *Low external part count. *Low start up current ( Typical 0.12mA ) *Automatic feed forward compensation *Pulse-by-Pulse current limiting *Under-voltage lockout with hysteresis *Double pulse Suppression *High current totem pole output to drive MOSFET directly *Internally trimmed band gap reference *500kHz operation DIP-8 BLOCK DIAGRAM 7 Vcc Vref 8 Internal Bias 1/2Vref 5V REF S/R 5 GND Vref Good Logic 1/3Vref U.V.L.