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Controllers | NCP81243
概览
The NCP81243 is a Multi-Phase buck solution is optimized for Intel IMVP8 compatible CPUs with user configurations of 3/2/1+ 2/1 phases, including an option to do 4+1. The controller combines true differential voltage sensing, differential inductor DCR current sensing, input voltage feed-forward, and adaptive voltage positioning to provide accurate regulated power for Desktop applications. The control system is based on Dual-Edge pulse-width modulation (PWM) combined with DCR current sensing providing the fastest initial response to dynamic load events at reduced system cost.
- Industrial Servers
- Embedded Systems Power Management
- Meets Intel's IMVP8 Specification
- Current Mode Dual Edge Modulation for Fast Initial Response to Transient Loading
- Dual High Performance Operational Error Amplifier
- One Digital Soft Start Ramp for Both Rails
- Dynamic Reference Injection® (Patent #US07057381)
- Accurate Total Summing Current Amplifier(Patent #US006683441)
- DAC with Droop Feed-forward Injection(Patent Pending)
- Dual High Impedance Differential Voltage and Total Current Sense Amplifiers
- Phase-to-Phase Dynamic Current Balancing
- “Lossless” DCR Current Sensing for Current Balancing
- Summed Compensated Inductor Current Sensing for Droop
- True Differential Current Balancing Sense Amplifiers for Each Phase
- Adaptive Voltage Positioning (AVP)
- Switching Frequency Range of 200KHz – 1.5MHz
- Startup into Pre-Charged Loads while avoiding False OVP
- Vin Feed Forward Ramp Slope
- Over Voltage Protection (OVP) & Under Voltage Protection (UVP)
- Over Current Protection (OCP)
- Dual Power Good Output with Internal Delays
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NCP81243MNTXG
Active
Pb
A
H
P
QFN-52
1
260
REEL
2500
Y
Step-Down
1/2/3
Voltage Mode
4.75
5.25
300 - 1200
$1.3665
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