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UCC3961

Unitrode
Part Number UCC3961
Manufacturer Unitrode
Description Advanced Primary-Side Startup Controller
Published Apr 30, 2020
Detailed Description ą UCC2961, UCC3961 ADVANCED PRIMARYĆSIDE STARTUP CONTROLLER D Operates with Secondary–Side PWM Control D Isolated PWM C...
Datasheet PDF File UCC3961 PDF File

UCC3961
UCC3961

Overview
ą UCC2961, UCC3961 ADVANCED PRIMARYĆSIDE STARTUP CONTROLLER D Operates with Secondary–Side PWM Control D Isolated PWM Command through a Pulse Transformer D Initial Free-Running Soft-Startup with Duty-Cycle Clamping D Up to 400-kHz Synchronizable Switching Frequency D High-Current FET Drive (1.
5-A Sink, 0.
75-A Source) SLUS431A – MAY 2000 – REVISED DECEMBER 2000 D Multi-Mode Overcurrent Protection with Restart, Latching, or Cycle-by-Cycle Current Limiting D Programmable Volt-Second Clamp for Transformer Reset D Undervoltage Lockout with 2-V Hysteresis D Low-Current Startup with Optional Disconnect D Programmable Overvoltage and Undervoltage Protection D 8–pin Version Also Available (UCC3960) typical application diagram VIN VOLT SEC CLAMP UCC3961 14 UV/OV STOP 1 UVS START OVS VDD 13 12 8 VS REF 6 OPTIONAL DEPLETION MODE SWITCH + – OUT 11 FEED BACK SOFT START FREQ SET 4 3 5 7 CS 9 FB SS RT SD 2 AGND PGND 10 FAULT LATCH DELAY CSD UDG–99039 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.
•POST OFFICE BOX 655303 DALLAS, TEXAS 75265 Copyright © 2000, Texas Instruments Incorporated 1 UCC2961, UCC3961 ADVANCED PRIMARYĆSIDE STARTUP CONTROLLER ą SLUS431A – MAY 2000 – REVISED DECEMBER 2000 description The UCC3961 advanced primary-side startup controller is a unique solution that provides all the primary-side functions required for a single-ended, isolated, switch-mode power converter incorporating secondary-side PWM control.
It is usable with a wide range of secondary control circuits and is especially well suited for systems where sophisticated handling ...


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