参数资料
| 型号： | NCP5382MNR2G |
| 厂商： | ON Semiconductor |
| 文件页数： | 23/33页 |
| 文件大小： | 0K |
| 描述： | IC BUCK CTLR 2-6PHASE 48-QFN |
| 产品变化通告： | NCP5371/72/82 Discontinuation 12/Aug/2008 |
| 标准包装： | 2,500 |
| 应用： | 控制器，Intel Pentium? IV |
| 输入电压： | 10.8 V ~ 13.2 V |
| 输出数： | 6 |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 48-VFQFN 裸露焊盘 |
| 供应商设备封装： | 48-QFN（7x7） |
| 包装： | 带卷 (TR) |
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NCP5382
FUNCTIONAL DESCRIPTION
General
The NCP5382 dual edge modulated multiphase PWM
controller is specifically designed with the necessary
features for a high current VR10 or VR11 CPU power
Mode
4 ? Phase
5 ? Phase
6 ? Phase
G5
GND
Normal
Normal
G6
GND
GND
Normal
system. The IC consists of the following blocks: Precision
Programmable DAC, Differential Remote Voltage Sense
Amplifier, High Performance Voltage Error Amplifier,
Differential Current Feedback Amplifiers, Precision
Oscillator and Triangle Wave Generators, and PWM
The NCP5382 can be used as a two phase or three phase
controller by configuring the controller for six phases, and
only using the appropriate gate signals. Two and Three
phase operation is shown in the following table:
Comparators. Protection features include Undervoltage
Lockout, Soft ? Start, Overcurrent Protection, Overvoltage
Protection, and Power Good Monitor.
Remote Output Sensing Amplifier (RSA)
Mode
2 ? Phase
3 ? Phase
G1
Normal
Normal
G2
Open
Open
G3
Open
Normal
G4
Normal
Open
G5
Open
Normal
G6
Open
Open
A true differential amplifier allows the NCP5382 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 ? .
This configuration keeps ground potential differences
between the local controller ground and the Vcore ground
reference point from affecting regulation of Vcore between
Vcore and Vcore ground reference points. The RSA also
subtracts the DAC (minus VID offset) voltage, thereby
producing an unamplified output error voltage at the
DIFFOUT pin. This output also has a 1.3 V bias voltage to
allow both positive and negative error voltages.
Precision Programmable DAC
A precision programmable DAC is provided. This DAC
has 0.5% accuracy over the entire operating temperature
range of the part. The DAC can be programmed to support
either VR10 or VR11 specifications. A program selection pin
is provided to accomplish this. This pin also sets the startup
mode of operation. Connect this pin to 1.25 V to select the
VR11 DAC table, and the VR11 startup mode. Connect this
pin to ground to select the VR10 DAC table and the VR11
startup mode. Connect this pin to VREF to select the VR10
DAC table and the VR10 startup mode.
High Performance Voltage Error Amplifier
The error amplifier is designed to provide high slew rate
and bandwidth. Although not required when operating as
a voltage regulator for VR10 or VR11, a capacitor from
COMP to VFB is required for stable unity gain test
configurations.
Gate Driver Outputs and 2/3/4/5/6 Phase Operation
The NCP5382 can be configured to operate in four, five
or six phase mode. The operating mode is determined by
sensing the impedance of the G5 and G6 pins during
startup. If the output pins G5 or G6 are shorted to ground,
then the operating mode will change according to
following table:
Differential Current Sense Amplifiers
Six differential amplifiers are provided to sense the
output current of each phase. The inputs of each current
sense amplifier must be connected across the current
sensing element of the phase controlled by the
corresponding gate output (G1, G2, G3, G4, G5, or G6) in
order for the phase to phase current balancing to work. If
a phase is unused, the differential inputs to that phase’s
current sense amplifier must be shorted together and
connected to V CCP as shown in the Application
Schematic.
A voltage is generated across the current sense element
(such as the inductor esr or dedicated current sense resistor)
by the current flowing in that phase. The output of the
current sense amplifiers are used to control three functions.
First, the output controls the adaptive voltage positioning,
where the output voltage is actively controlled according
to the output current. In this function, all of the current
sense outputs are summed so that the total output current
is used for output voltage positioning. Second, the output
signal is fed to the current limit circuit. This again is the
summed current of all phases in operation. Finally, the
individual phase current is connected to the PWM
comparator. In this way current balance is accomplished.
Oscillator and Triangle Wave Generator
A programmable precision oscillator is provided. The
oscillator ’s frequency is programmed by the resistance
connected from the ROSC pin to ground. The user will
usually form this resistance from two resistors in order to
create a voltage divider that uses the ROSC output voltage
as the reference for creating the current limit setpoint
voltage. The oscillator frequency range is 100 kHz/phase
to 1.0 MHz/phase. The oscillator generates up to 6 triangle
waveforms (symmetrical rising and falling slopes)
between 1.3 V and 2.3 V. The triangle waves have a phase
delay between them such that the phase angles are evenly
distributed about 360 degrees.
http://onsemi.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| NCP5383 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:2 Phase Buck Controller with Integrated Gate Drivers and AVP |
| NCP5383_1 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:2 Phase Buck Controller with Integrated Gate Drivers and AVP |
| NCP5383MNR2G | 功能描述:DC/DC 开关控制器 Two Phase Buck Controller 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 |
| NCP5385 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:2/3/4 Phase Buck Controller for VR10 and VR11 Pentium IV Processor Applications |
| NCP5385MNR2G | 功能描述:DC/DC 开关控制器 2/3/4 PHASE CNTRLR 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 |
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