UC1903 UC2903 UC3903 www.ti.com ........................................................................................................................................ SLUS233AOCTOBER 1999REVISED SEPTEMBER 2008 Quad Supply and Line Monitor 1 FEATURES DESCRIPTION Inputs for Monitoring up to Four Separate The UC1903 family of quad supply and line monitor Supply Voltage Levels integrated circuits will respond to under- and over-voltage conditions on up to four continuously Internal Inverter for Sensing a Negative Supply monitored voltage levels. An internal op-amp inverter Voltage allows at least one of these levels to be negative. A Line/Switch Sense Input for Early Power separate line/switcher sense input is available to Source Failure Warning provide early warning of line or other power source Programmable Under- and Over-Voltage Fault failures. Thresholds with Proportional Hysteresis The fault window adjustment circuit on these devices A Precision 2.5-V Reference provides easy programming of under- and over-voltage thresholds. The thresholds, centered General Purpose Op-Amp for Auxiliary Use around a precision 2.5-V reference, have an input Three High Current, >3 0mA, Open-Collector hysteresis that scales with the window width for Outputs Indicate Over-Voltage, Under-Voltage precise, glitch-free operation. A reference output pin and Power OK Conditions allows the sense input fault windows to be scaled 8-V to 40-V Supply Operation with 7-mA independently using simple resistive dividers. Stand-By Current The three open collector outputs on these devices sink in excess of 30 mA of load current when active. The under- and over-voltage outputs respond after separate, user defined, delays to respective fault conditions. The third output is active during any fault condition including under- and over-voltage, line/switcher faults, and input supply under-voltage. The off state of this output indicates apower O situation. BLOCK DIAGRAM Note: Pin numbers refer to J, N and DW packages. 1 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. Copyright 19992008, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.UC1903 UC2903 UC3903 SLUS233AOCTOBER 1999REVISED SEPTEMBER 2008 ........................................................................................................................................ www.ti.com DESCRIPTION (CONT.) An additional, uncommitted, general purpose op-amp is also included. This op-amp, capable of sourcing 20 mA of output current, can be used for a number of auxiliary functions including the sensing and amplification of a feedback error signal when the 2.5-V output is used as a system reference. These parts operate over an 8-V to 40-V input supply range and require a typical stand-by current of only 7 mA. CONNECTION DIAGRAMS DIL-18, SOIC-18 PLCC-20, LCC-20 J or N, DW PACKAGE Q, L PACKAGE (TOP VIEW) (TOP VIEW) +VIN 1 18 G.P. OP-AMP INV. V (2.5 V) 2 17 G.P. OP-AMP N.I. REF 3 16 G.P. OP-AMP OUT GND WINDOW ADJUST 4 15 LINE/SWITCHER SENSE SENSE 4 5 14 POWER OK INVERT INPUT 3 2 1 20 19 6 13 UV DELAY SENSE 4 7 12 4 18 G.P. OP-AMP OUT SENSE 3 UV FAULT GND LINE/SWITCHER 8 11 5 SENSE 2 OV FAULT WINDOW ADJUST 17 SENSE 9 10 SENSE 1 OV DELAY 6 NC 16 POWER OK SENSE 4 INVERT 7 15 UV DELAY INPUT 14 8 UV FAULT SENSE 4 9 10 11 12 13 (1) ABSOLUTE MAXIMUM RATINGS over operating free-air temperature range (unless otherwise noted) VALUE UNIT +VIN Supply Voltage +40 V Open Collector Output Voltages. +40 V Open Collector Output Currents. 50 mA Sense 1-4 Input Voltages 0.3 to +20 V Line/Switcher Sense Input Voltage 0.3 to +40 V Op-Amp and Inverter Input Voltages 0.3 to +40 V Op-Amp and Inverter Output Currents . 40 mA Window Adjust Voltage. 0.0 to +10 V Delay Pin Voltages 0.0 to +5 V Reference Output Current 40 mA (1) Power Dissipation at T = 25C 1000 mW A (1) Power Dissipation at T = 25C 2000 mW C Operating Junction Temperature 55 to +150 C Storage Temperature 65 to +150 C Lead Temperature (Soldering, 10 Seconds) 300 C (1) Voltages are referenced to ground (Pin 3). Currents are positive into, negative out of, the specified terminals. Consult Packaging Section of Databook for thermal limitations and considerations of package. 2 Submit Documentation Feedback Copyright 19992008, Texas Instruments Incorporated Product Folder Link(s): UC1903 UC2903 UC3903 SENSE 3 GND V (2.5 V) SENSE 2 REF +VIN SENSE 1 G.P. OP-AMP INV OV DELAY G.P. OP-AMP N.I. OV FAULT