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UCC3919D Datasheet(PDF) 1 Page - Texas Instruments |
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UCC3919D Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 27 page  UCC2919 UCC3919 SLUS374C − JULY 1999 − REVISED NOVEMBER 2005 3V TO 8V HOT SWAP POWER MANAGER 1 www.ti.com FEATURES D Precision Fault Threshold D Charge Pump for Low RDS(on) High Side Drive D Differential Sense Inputs D Programmable Average Power Limiting D Programmable Linear Current Control D Programmable Fault Time D Fault Output Indicator D Manual and Automatic Reset Modes D Shutdown Control With Programmable Softstart D Undervoltage Lockout D Electronic Circuit Breaker Function DESCRIPTION The UCC3919 family of hot swap power managers provide complete power management, hot swap, and fault handling capability. The UCC3919 features a duty ratio current limiting technique, which provides peak load capability while limiting the average power dissipation of the external pass transistor during fault conditions. The UCC3919 has two reset modes, selected with the TTL/CMOS compatible L/R pin. In one mode, when a fault occurs the IC repeatedly tries to reset itself at a user defined rate, with user defined maximum output current and pass transistor power dissipation. In the other mode the output latches off and stays off until either the L/R pin is reset or the shutdown pin is toggled. The on board charge pump circuit provides the necessary gate voltage for an external N-channel power FET. TYPICAL APPLICATION DIAGRAM UDG−01068 + VDD GND LINEAR CURRENT AMP TIMER CT CAP RS IBIAS IMAX CSN GATE FROM SUPPLY 3 V TO 8 V TO LOAD CSP 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. Copyright 2001 − 2005, Texas Instruments Incorporated |
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