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NCP112 Dataheets PDF



Part Number NCP112
Manufacturers ON Semiconductor
Logo ON Semiconductor
Description Supervisory-IC
Datasheet NCP112 DatasheetNCP112 Datasheet (PDF)

NCP112 Supervisory IC for Desktop Power Supply Monitoring The NCP112 is a highly integrated supervisory circuit that incorporates all the functions necessary for monitoring and controlling a multi−output switch−mode power supply system. The NCP112 provides an ability to monitor the status of the power supply outputs and communicate it to the system controller. The programmable output delays protect against spurious fault indicators. Features • Under and Overvoltage Protection for 3.3 V, 5.0 V a.

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NCP112 Supervisory IC for Desktop Power Supply Monitoring The NCP112 is a highly integrated supervisory circuit that incorporates all the functions necessary for monitoring and controlling a multi−output switch−mode power supply system. The NCP112 provides an ability to monitor the status of the power supply outputs and communicate it to the system controller. The programmable output delays protect against spurious fault indicators. Features • Under and Overvoltage Protection for 3.3 V, 5.0 V and 12 V Outputs • Additional Adjustable Overvoltage Protection Input • Built−in Hysteresis on all Input Pins • Programmable Undervoltage Blanking During Power−Up • Fault Output with 20 mA Sink Capability • Programmable Remote On/Off Delay Time • Programmable Power Good Delay Time • Precision Voltage Reference with 20 mA Source Capability • Optimized for Low−Cost 100 nF Capacitors • Enhanced Replacement to the TSM112 • This is a Pb−Free Device Typical Applications • Personal Computer Switch Mode Power Supply Monitoring • Multi−Output Power Supplies Requiring System Supervision http://onsemi.com MARKING DIAGRAMS 14 1 SOIC−14 D SUFFIX CASE 751A NCP112DG AWLYWW 1 14 1 PDIP−14 P SUFFIX CASE 646 NCP112P AWLYYWWG 1 A = Assembly Location WL = Wafer Lot Y, YY = Year WW = Work Week G = Pb−Free Package PIN CONNECTIONS VS33 VS5 VS12 ADJ PGI CTUV GND VCC FAULT PGO CTPG CTREMOTE REMOTE VREF PDIP−14, SOIC−14 ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 8 of this data sheet. © Semiconductor Components Industries, LLC, 2009 August, 2009 − Rev. 4 1 Publication Order Number: NCP112/D NCP112 PIN FUNCTION DESCRIPTION Pin No. Symbol Function 1 VS33 3.3 V SENSE INPUT 2 VS5 5.0 V SENSE INPUT 3 VS12 12 V SENSE INPUT 4 ADJ ADJUSTABLE OVP INPUT 5 PGI POWER GOOD INPUT 6 CTUV ADJUSTABLE TIMING CAPACITOR 7 GND GROUND 8 VREF VOLTAGE REFERENCE 9 REMOTE REMOTE ON/OFF INPUT 10 CTREMOTE 11 CTPG 12 PGO ADJUSTABLE REMOTE ON/OFF CAPACITOR ADJUSTABLE POWER GOOD CAPACITOR POWER GOOD OUTPUT 13 FAULT FAULT OUTPUT 14 VCC POWER SUPPLY VOLTAGE Description Over/undervoltage sense input for 3.3 V. Over/undervoltage sense input for 5.0 V. Over/undervoltage sense input for 12 V. May be used for an additional overvoltage protection signal. Power good input signal. Adjustable undervoltage blanking delay during power−up. Ground Precision 2.5 V reference output. Input remote control from the microcontroller. Acts as a reset signal after a fault condition. Adjustable remote delay. Adjustable power good delay. Power good output. Active high when no fault conditions are present. Detects over/undervoltage conditions. Active high during a fault condition. Power supply voltage. http://onsemi.com 2 1 VS33 2 VS5 3 VS12 VREF OV Detector UV Detector 8 VREF 2.5 V Reference 1.28 V 4 ADJ 7 GND + - NCP112 VCC 14 OV Fault Delay VCC SET SQ R CLR Q Remote On/Off Delay 13 FAULT 10 CTREMOTE 3.4 V UV Blanking Delay at Power Up VCC + 1.28 V 9 REMOTE + 1.28 V 5 PGI Power Good Delay 12 PGO 6 CTUV Figure 1. Block Diagram 11 CTPG http://onsemi.com 3 NCP112 MAXIMUM RATINGS Rating Symbol Value Unit Power Supply Voltage (Note 1) Power Good Output Current Fault Output Current Voltage Reference Output Current Voltage Rating (Pins 4, 5, 6, 9, 10, 11) VCC IPGO IFAULT IREF ADJ, PGI, CTUV, REMOTE, CTREMOTE, CTPG 18 30 30 20 VCC V mA mA mA V Voltage Rating (Pins 12, 13) Power Dissipation and Thermal Characteristics (PDIP−14) Thermal Resistance, Junction−to−Air Thermal Resistance, Junction−to−Case Maximum Power Dissipation @ 25°C Power Dissipation and Thermal Characteristics (SOIC−14) Thermal Resistance, Junction−to−Air Thermal Resistance, Junction−to−Case Maximum Power Dissipation @ 25°C Operating Junction Temperature Operating Ambient Temperature Storage Temperature Range PGO, FAULT RRPqqDJJAC RRqqJJAC PD TJ TA Tstg 18 100 45 1.25 125 30 1.0 +150 −40 to +125 −55 to +150 V °C/W °C/W W °C/W °C/W W °C °C °C ELECTRICAL CHARACTERISTICS (VCC = 5.0 V, TA = 25°C for typical values and TA = 0°C to 85°C for min and max values, unless otherwise noted.) Characteristic Symbol Min Typ Max Unit OPERATING CONDITIONS DC Power Supply Power Supply Current OVERVOLTAGE/UNDERVOLTAGE PROTECTION Overvoltage Protection VCC 4.5 − 16 V ICC − 3.0 5.0 mA 3.3 V Output Sense Hysteresis* 5.0 V Output Sense Hysteresis* 12 V Output Sense Hysteresis* Undervoltage Protection VOV33 VOVhys33 VOV5 VOVhys5 VOV12 VOVhys12 3.8 4.0 − 40 5.8 6.1 − 60 13.4 14.2 − 130 4.2 − 6.4 − 15 − V mV V mV V mV 3.3 V Output Sense Hysteresis* VUV33 VUVhys33 2.3 2.5 2.7 − 100 − 5.0 V Output Sense Hysteresis* VUV5 VUVhys5 3.7 4.0 4.3 − 100 − 12 V Output Sense Hysteresis* VUV12 VUVhys12 9.2 10 10.8 − 100 − *Hysteresis is measured in direction from threshold point back to n.


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