ON NCP81243MNTXG

控制器，Intel IMVP84.5V ~ 20V

Overview

ON Semiconductor NCP81243 Dual Output Controller offers an optimized multi-phase buck solution for Intel IMVP8 compatible CPUs. NCP81243's control system is based on dual-edge pulse-width modulation (PWM) and DCR current sensing. This design delivers an ultra-fast initial response to dynamic load events. In light load conditions, the NCP81243 can auto-frequency scale while still delivering excellent transient performance. By integrating differential-inductor DCR current sensing, true-differential voltage sensing, input voltage feed-forward, and adaptive-voltage positioning, the NCP81243 controller accurately regulates power for both desktop and notebook applications. The NCP81243 controller includes five PWM drive signals. Designers can configure the PWM drive signals into multiple setups. Dual high-performance operational error amplifiers simplify loop compensation. Patented Dynamic Reference Injection ensures designers do not need to compromise between closed-loop transient response and Dynamic VID performance. In addition, NCP81243's Patented Total Current Summing delivers highly accurate droop and digital current monitoring.

Features

• Power Saving Phase Shedding

• Vin Feed Forward Ramp Slope

• Over Current Protection (OCP)

• Meets Intel's IMVP8 Specification

• Adaptive Voltage Positioning (AVP)

• One Digital Soft Start Ramp for Both Rails

• Phase-to-Phase Dynamic Current Balancing

• Dual Power Good Output with Internal Delays

• Switching Frequency Range of 200KHz – 1.5MHz

• Dual High Performance Operational Error Amplifier

• Dynamic Reference Injection? (Patent #US07057381)

• “Lossless” DCR Current Sensing for Current Balancing

• DAC with Droop Feed-forward Injection(Patent Pending)

• Startup into Pre-Charged Loads while avoiding False OVP

• Summed Compensated Inductor Current Sensing for Droop

• Over Voltage Protection (OVP) & Under Voltage Protection (UVP)

• Accurate Total Summing Current Amplifier(Patent #US006683441)

• True Differential Current Balancing Sense Amplifiers for Each Phase

• Dual High Impedance Differential Voltage and Total Current Sense Amplifiers

• Current Mode Dual Edge Modulation for Fast Initial Response to Transient Loading

Applications

• Automotive

• Personal electronics

• Communications equipment