ncp5391 ON Semiconductor, ncp5391 Datasheet
ncp5391
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ncp5391 Summary of contents
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... NCP5391 2/3 Phase Buck Controller for VR11 Pentium IV Processor Applications The NCP5391 is a two- or three-phase buck controller which combines differential voltage and current sensing, and adaptive voltage positioning to power Intel's most demanding Pentium Processors and low voltage, high current power supplies. Dual-edge ...
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... NCP5391 PIN CONNECTIONS 1 VID0 2 VID1 3 VID2 NCP5391 4 2/3-Phase Buck Controller VID3 (32-Pin QFN) 5 VID4 6 VID5 AGND down-bonded 7 to exposed flag VID6 8 VID7 http://onsemi.com DRVON 22 CS3 21 CS3N 20 CS2 19 CS2N 18 CS1 17 CS1N ...
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... Amplifier VDRP + - 1.3 V CS1 + - CS1N Gain = 6 CS2 + CS2N - Gain = 6 CS3 + CS3N - Gain = 6 ROSC2 Oscillator ROSC ILIM EN VCC AGND 9.0 V Figure 1. Simplified Block Diagram NCP5391 NCP5391 Fault + - + - + - 4OFF OVER DIFFOUT 1.3 V Fault Logic + 3 Phase Detect - and Current Limit Monitor Circuits + - UVLO http://onsemi.com 3 DGND ENB G1 ...
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... VS- VS+ RISO1 RISO2 RT2 NCP5391 CFB1 RFB1 DIFFOUT RFB VFB RDRP VDRP RD1 CD1 COMP RF ILIM CF CH RLIM1 RLIM2 VCCP VSSP NCP5391 12 V_FILTER CVCC1 NCP3418B VCC OD VCC DGND AGND CS1 CS1N 12 V_FILTER G2 CS2 CS2N VCC G3 OD CS3 CS3N IN 12 V_FILTER ...
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... VR_RDY VS- VS+ RISO1 RISO2 RT2 NCP5391 CFB1 RFB1 DIFFOUT RFB VFB RDRP VDRP RD1 CD1 COMP RF ILIM CF CH RLIM1 RLIM2 VCCP VSSP NCP5391 12 V_FILTER CVCC1 VCC OD VCC DGND AGND CS1 CS1N G2 CS2 CS2N G3 CS3 CS3N 12 V_FILTER DRVON ROSC2 ROSC SS ROSC2 ...
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... R 33 THPAD/ Copper pad on the bottom of the IC for heatsinking. This pin should be connected to the ground plane AGND under the IC. Power supply return for the analog circuits that control output voltage. NCP5391 Description sense amplifier. CORE sense amplifier. CORE ...
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... Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. NOTE: ESD Sensitive Device NCP5391 Rating ) on a thermally conductive PCB in free air qJA http://onsemi.com ...
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... ADAPTIVE VOLTAGE POSITIONING AMPLIFIER DRP Current Sense Input to V Gain DRP Current Sense Input to V Output DRP -3dB Bandwidth (Note 1) 1. Guaranteed by design. Not tested in production. NCP5391 = 0.1 mF, F < 13.2 V; All DAC Codes VCC Test Conditions 1.0 kW between VFB and COMP Pins GND, L ...
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... MODULATORS (PWM COMPARATORS) Minimum Pulse Width Magnitude of the PWM Ramp 0% Duty Cycle 100% Duty Cycle Minimum PWM Linear Duty Cycle (Note 1) 1. Guaranteed by design. Not tested in production. NCP5391 = 0.1 mF, F < 13.2 V; All DAC Codes VCC Test Conditions DV(CSx-CSxN (all phases), 1.3 V < V < 1.9 V, ...
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... Upper Threshold Voltage Rising Delay Falling Delay SOFT-ST ART SS Pin Source Current SS Pin Source Current Soft-Start Ramp Time SS Pin Discharge Voltage 1. Guaranteed by design. Not tested in production. NCP5391 = 0.1 mF, F < 13.2 V; All DAC Codes VCC Test Conditions Between any 2 phases 400 kHz ...
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... Negative Slew Rate Limit INPUT SUPPLY CURRENT V Operating Current DAC System Voltage Accuracy No-Load Offset Voltage from Nominal DAC Specification 1. Guaranteed by design. Not tested in production. NCP5391 = 0.1 mF, F < 13.2 V; All DAC Codes VCC Test Conditions From ENABLE = < max Discharge SS PIN = 0.01 mF ...
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... NCP5391 VID4 VID3 VID2 VID1 12 ...
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... NCP5391 VID4 VID3 VID2 VID1 12 ...
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... NCP5391 VID4 VID3 VID2 VID1 12 ...
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... NCP5391 VID4 VID3 VID2 VID1 12 ...
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... T , AMBIENT TEMPERATURE (°C) A Figure 4. IC Quiescent Current vs. Ambient Temperature 0.0198 0.0196 0.0194 0.0192 0.0190 0.0188 0.0186 0.0184 0.0182 0.0180 0.5 0.6 NCP5391 TYPICAL CHARACTERISTICS Figure 5. VCC Undervoltage Lockout Threshold Voltage vs. Ambient Temperature 25°C 0°C 70°C 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 VID Figure 6. Typical DAC Voltage Offset vs. ...
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... Lockout, Soft-Start, Overcurrent Protection, Overvoltage Protection, and Power Good Monitor. Remote Output Sensing Amplifier (RSA) A true differential amplifier allows the NCP5391 to measure Vcore voltage feedback with respect to the Vcore ground reference point by connecting the Vcore reference point to VS+, and the Vcore ground reference point to VS-. ...
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... UVLO threshold overvoltage CC condition exists. The NCP5391 ramps Vcore to 1 the SS capacitor charge rate, pauses at 1.1 V for 170 ms, reads the VID pins to determine the DAC setting, then ramps Vcore to the final DAC setting at the Dynamic VID slew rate of 7.3 mV/ms ...
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... The NCP5391 is a high performance multiphase controller optimized to meet the Intel VR11 Specifications. The demo board for the NCP5391 is available by request configured as a three phase solution with decoupling designed to provide a 1.0 mW load line under step load. A schematic is available upon request from ON Semiconductor ...
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... VID selection, then enable the test. See Figures 10 through 12. Figure 10. 1.6 to 0.5 Dynamic VID Response Figure 11. Dynamic VID Settling Time Rising Figure 12. Dynamic VID Settling Time Falling NCP5391 Design Methodology Decoupling the V Pin on the input filter is required as shown in the V minimize supply noise on the IC ...
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... A at 100°C. The total sensed current can be observed as a scaled voltage at the VDRP pin added to a positive, no-load offset of approximately 1.3 V. NCP5391 This equation is valid for the individual phase frequency in both three and four phase mode. 32. 10.14 ROSC + 10 ...
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... Inductor Current Sense Compensation The NCP5391 uses the inductor current sensing method. This method uses an RC filter to cancel out the inductance of the inductor and recover the voltage that is the result of Rsense(T) + Figure 16. The demoboard inductor measured 350 nH and 0. room temp. The actual value used for Rsense was 953 W which matches the equation for Rsense at approximately 50C ...
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... DC-DC converter must have sufficiently high gain to control the output impedance completely. Standard Type-3 compensation works well with the NCP5391. RFB1 should be kept above 50 W for amplifier stability reasons. The goal is to compensate the system such that the resulting gain generates constant output impedance from the frequency where the ceramic takes over holding the impedance below 1 ...
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... NTC will be effected by the location of the output inductor with respect to the NTC and airflow, and should be verified with an actual system thermal solution. NCP5391 RRDP determines the target output impedance by the basic equation: The value of the inductor's DCR varies with temperature ...
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... Allegro Free Physical Viewer 15.x from the Cadence website http://www.cadence.com/. NCP5391 Figure 20. Close attention should be paid to the routing of the sense traces and control lines that propagate away from the controller IC ...
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... B 0.05 C BOTTOM VIEW The products described herein (NCP5391/D), may be covered by one or more of the following U.S. patent; 7057381. There may be other patents pending. Pentium is a registered trademark of Intel Corporation. ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein ...