UC3903N UNITRODE, UC3903N Datasheet
UC3903N
Specifications of UC3903N
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UC3903N Summary of contents
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FEATURES 1 Inputs for Monitoring up to Four Separate Supply Voltage Levels Internal Inverter for Sensing a Negative Supply Voltage Line/Switch Sense Input for Early Power Source Failure Warning Programmable Under- and Over-Voltage Fault Thresholds with Proportional Hysteresis ...
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UC1903 UC2903 UC3903 SLUS233A – OCTOBER 1999 – REVISED SEPTEMBER 2008 DESCRIPTION (CONT.) An additional, uncommitted, general purpose op-amp is also included. This op-amp, capable of sourcing output current, can be used for a number of auxiliary ...
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ELECTRICAL CHARACTERISTICS Unless otherwise stated, these specifications apply for T UC2903; and 0°C to +70°C for the UC3903; +V PARAMETER SUPPLY Input Supply Current No Faults UV, OV and Line Fault Supply Under Voltage Threshold Fault Outputs Enabled ...
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UC1903 UC2903 UC3903 SLUS233A – OCTOBER 1999 – REVISED SEPTEMBER 2008 ELECTRICAL CHARACTERISTICS (continued) Unless otherwise stated, these specifications apply for T UC2903; and 0°C to +70°C for the UC3903; +V PARAMETER FAULT OUTPUTS (OV, UV, AND POWER 0K) Maximum ...
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UC1903 +VIN REFERENCE CIRCUIT 2 OUTPUT R2 2 BIAS ADJ CANCELLATION AND MIRROR CIRCUITS A. The UC1903 fault window circuitry generates OV ...
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UC1903 UC2903 UC3903 SLUS233A – OCTOBER 1999 – REVISED SEPTEMBER 2008 OPERATION AND APPLICATION INFORMATION Setting a Fault Window The fault thresholds on the UC1903 are generated by creating positive and negative offsets, equal in magnitude, that are referenced to ...
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Fault Windows Scaled Independently In many applications, it may be desirable to monitor various supply voltages, or voltage levels, with varying fault windows. Using the reference output and external resistive dividers this is easily accomplished with the UC1903. ...
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UC1903 UC2903 UC3903 SLUS233A – OCTOBER 1999 – REVISED SEPTEMBER 2008 Figure 4 demonstrates one of many auxiliary functions that the uncommitted op-amp on the UC1903 can be used for. Alternatively, this op-amp can be used to buffer high impedance ...
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Using The Line/Switcher Sense Output The line switcher sense input to the UC1903 can be used for early detection of line, switcher, or other power source, failures. Internally referenced to 2.0 V, the line sense comparator will cause ...
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UC1903 UC2903 UC3903 SLUS233A – OCTOBER 1999 – REVISED SEPTEMBER 2008 OV and UV Comparators Maintain Accurate Thresholds The structure of the OV and UV comparators, shown in case where multiple sense inputs cross a fault threshold simultaneously. Unused sense ...
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PACKAGING INFORMATION Orderable Device (1) Package Type Package Status 5962-88697012A ACTIVE LCCC 5962-8869701VA ACTIVE CDIP UC1903J ACTIVE CDIP UC1903J883B ACTIVE CDIP UC1903L ACTIVE LCCC UC1903L883B ACTIVE LCCC UC2903DW ACTIVE SOIC UC2903DWG4 ACTIVE SOIC UC2903DWTR ACTIVE SOIC UC2903DWTRG4 ACTIVE SOIC ...
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... Orderable Device (1) Package Type Package Status UC3903N ACTIVE PDIP UC3903NG4 ACTIVE PDIP UC3903Q ACTIVE PLCC UC3903QG3 ACTIVE PLCC (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. ...
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Military: UC2903M, UC1903, UC1903 NOTE: Qualified Version Definitions: • Catalog - TI's standard catalog product Military - QML certified for Military and Defense Applications • PACKAGE OPTION ADDENDUM Addendum-Page 3 9-Aug-2011 ...
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TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Type Drawing UC2903DWTR SOIC DW UC3903DWTR SOIC DW PACKAGE MATERIALS INFORMATION Pins SPQ Reel Reel A0 (mm) Diameter Width (mm) W1 (mm) 18 2000 330.0 24.4 10.9 18 ...
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Device Package Type UC2903DWTR SOIC UC3903DWTR SOIC PACKAGE MATERIALS INFORMATION Package Drawing Pins SPQ Length (mm 2000 DW 18 2000 Pack Materials-Page 2 6-Nov-2008 Width (mm) Height (mm) 346.0 346.0 41.0 346.0 346.0 ...
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Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the ...