UCC3961 Datasheet

IC型號：
UCC3961
PDF描述：
ADVANCED PRIMARY SIDE STRTUP CONTROLLER
文件大小：
235.53KB
芯片廠家：
TI

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UCC2961, UCC3961

ADVANCED PRIMARY SIDE STARTUP CONTROLLER

SLUS431A 鈥?MAY 2000 鈥?REVISED DECEMBER 2000

Operates with Secondary鈥揝ide PWM

Control

Isolated PWM Command through a Pulse

Transformer

Initial Free-Running Soft-Startup with

Duty-Cycle Clamping

Up to 400-kHz Synchronizable Switching

Frequency

High-Current FET Drive (1.5-A Sink, 0.75-A

Source)

Multi-Mode Overcurrent Protection with

Restart, Latching, or Cycle-by-Cycle

Current Limiting

Programmable Volt-Second Clamp for

Transformer Reset

Undervoltage Lockout with 2-V Hysteresis

Low-Current Startup with Optional

Disconnect

Programmable Overvoltage and

Undervoltage Protection

8鈥損in Version Also Available (UCC3960)

typical application diagram

VIN

UCC3961

OPTIONAL

DEPLETION

MODE

SWITCH

UV/OV

STOP

UVS

START

VDD

OVS

鈥?/div>

REF

VOLT

SEC

CLAMP

OUT

FEED

BACK

SOFT START

FREQ

SET

FAULT LATCH DELAY

CSD

AGND PGND

UDG鈥?9039

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.

漏

2000, Texas Instruments Incorporated

POST OFFICE BOX 655303

鈥?/div>

DALLAS, TEXAS 75265

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