参数资料
| 型号： | NCP5395GMNR2G |
| 厂商： | ON Semiconductor |
| 文件页数： | 25/29页 |
| 文件大小： | 0K |
| 描述： | IC PHASE CONTROLLER 2/3/4 48-QFN |
| 标准包装： | 2,500 |
| 应用： | 控制器，Intel VR11 |
| 输入电压： | 4.75 V ~ 5.25 V |
| 输出数： | 4 |
| 输出电压： | 0.5 V ~ 1.6 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | * |
| 封装/外壳： | * |
| 供应商设备封装： | * |
| 包装： | * |
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NCP5395
FUNCTIONAL DESCRIPTIONS
General
The NCP5395 dual edge modulated multiphase PWM
controller is specifically designed with the necessary
features for a high current CPU system. The IC consists of
the following blocks: Precision Flexible DAC, Differential
Remote Voltage Sense Amplifier, High Performance
Voltage Error Amplifier, Differential Current Feedback
Amplifiers, Precision Oscillator and Saw ? tooth Generator,
and PWM Comparators with Hysteresis. The controller also
supports power saving mode as per Intel VR11.1 by
accurately monitoring the current and switching between
multi ? phase and single phase operations as requested by the
microprocessor system. Protection features include:
Undervoltage Lockout, Soft ? Start, Overcurrent Protection,
Overvoltage Protection, and Power Good Monitor.
Precision Programmable DAC
A precision flexible DAC is provided. The DAC will
conform to 2 different specifications: AMD or VR11.1. The
VID7/AMD pin is provided to determine which DAC
specification will be used and which soft ? start mode the part
will use for power up. There are two soft ? start modes. If
VID7/AMD is above it’s threshold the device will soft ? start
and ramp directly to the DAC code present on the VID
inputs. The following truth table describes the functionality:
voltage with the DAC voltage. The non ? inverting input
sums the remote output voltage with a 1.3 V reference. The
resulting voltage at the output of the remote sense amplifier is:
V Diffout + V out ) 1.3 V * V dac * V outreturn
This signal then goes through a standard compensation
circuit and into the inverting input of the error amplifier. The
non ? inverting input of the error amplifier is also connected
to the 1.3 V reference. The 1.3 V reference then is subtracted
out and the error signal at the comp pin of the error amplifier
is as normally expected:
V comp + V dac * V out
The non ? inverting input of the remote sense amplifier is
pulled low through a small current sink during a fault
condition to prevent accidental charging of the regulator
output.
2/3/4 Phase Operation
The part can be configured to 2 ? , 3 ? , or 4 ? phase mode. In
2 ? or 3 ? phase mode, the internal drivers will be used. In
4 ? phase mode, an external driver must be used to drive
phase 4. The NCP5359 driver is suggested to be used with
the controller. The input to G4 pin will decide which phase
mode the system is in operation. Please refer to the
Application Schematics for more information.
VID7/AMD Pin
Above AMD
Threshold
Below AMD
Threshold
VID7
Not
active
Active
Enable
Pin Mode
AMD
Threshol
ds
VR11.1
Threshol
ds
Soft Start
Mode
Ramp to
VID
Ramp to
Vboot
High Performance Voltage Error Amplifier
A high performance voltage error amplifier is provided.
The error amplifier ’s inverting input is VFB and its output
is COMP . A standard type 3 compensation circuit is used
compensate the system. This involves a 3 pole, 2 zero
compensation network. The comp pin is pulled to ground
before soft ? start for smooth start up.
VID INPUTS
VID0 ? VID7 control the target regulation voltage during
normal operation. In AMD mode the VID capture is enabled
just before soft start. In VR11 mode the VID capture is
enabled at the end of the V BOOT waiting period. If the VID
is valid the DAC will track to it. If an invalid VID occurs it
will be ignored for 10 m s before the controller shuts down.
Remote Sense Amplifier
A high performance differential amplifier is provided to
accurately sense the output voltage of the regulator. The
non ? inverting input should be connected to the regulator ’s
output voltage. The inverting input should be connected to
the return line of the regulator. Both connection points are
intended to be at a remote point so that the most accurate
reading of the output voltage can be obtained. The amplifier
is configured in a very unique way. First, the gain of the
amplifier is internally set to unity. Second, both the inverting
and non ? inverting inputs of the amplifier are summing
Differential Current Sense
Four differential amplifiers are provided to sense the
output current of each phase. These current sense amplifiers
sense the current through the corresponding phase. A
voltage is generated across a current sense element such as
an inductor or sense resistor. The sense element should be
between 0.5 m W and 1.5 m W . It is possible to sense both
negative and positive going current. The information is used
to create the signal CSSUM and provide feedback for
current sharing.
Precision Oscillator
A programmable precision oscillator is provided. This
oscillator is programmed by the summed resistance of an
oscillator resistor and a current limit resistor. The output
voltage of this pin is used as the reference for the current
limit. The oscillator frequency range is 125 KHz/phase to
1000 KHz/phase. The oscillator frequency is proportional to
the current drawn out of the OSC pin.
nodes. The inverting input sums the output voltage return
http://onsemi.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| NCP5395MNR2G | 功能描述:DC/DC 开关控制器 2/3/4 PH CTRL/DRIVE RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| NCP5395T | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:2/3/4-Phase Controller with On Board Gate Drivers for CPU Applications |
| NCP5395TMNR2G | 功能描述:DC/DC 开关控制器 2/3/4 PH CONTROLLER/ DRIVE RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| NCP5398MNR2G | 功能描述:电流型 PWM 控制器 2/3/4 PHASE CONTROLR RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| NCP5399FTR2G | 功能描述:电流型 PWM 控制器 1/2 PHASE CONTROLLER RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
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