- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄361102 > NCP5314FTR2G (ON SEMICONDUCTOR) Two/Three/Four−Phase Buck CPU Controller PDF資料下載
參數(shù)資料
| 型號(hào)： | NCP5314FTR2G |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Two/Three/Four−Phase Buck CPU Controller |
| 中文描述： | SWITCHING CONTROLLER, 1200 kHz SWITCHING FREQ-MAX, PQFP32 |
| 封裝： | LEAD FREE, LQFP-32 |
| 文件頁數(shù)： | 18/29頁 |
| 文件大?。?/td> | 684K |
| 代理商： | NCP5314FTR2G |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁當(dāng)前第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁
NCP5314
http://onsemi.com
18
will be a 120 degree delay between pulses. The phase firing
order will become 123.
Two and singlephase operation may be realized as well.
First, the designer must choose the proper phases. Two phase
operation must use phase 2 and 4 by tying CS1N, CS1P,
CS3N and CS3P to ground. This will then use phase 2 and
4 as the gate drivers. The other gate drives may switch, so
leave them unconnected.
Single phase is best accomplished by using only Phase 2
as the switch controller. Connect CS2P and CS2N pins to the
current sense capacitor and the gate drive to the driver IC.
Tie all other CSxx pins together and connect them to ground.
Table 1. Description of Fault Logic
Faults
Results
Stop
Switching
PWRGD Level
Driver
Enable
SS
Characteristics
Reset Method
Overvoltage Lockout
Yes
Low
High
0.3 mA
Power On
Enable Low
Yes
Depends on output voltage level
Low
0.3 mA
Not Affected
Module Overcurrent Limit
Yes
Depends on output voltage level
Low
0.3 mA
Power On
DAC Code = 11111x
Yes
Depends on output voltage level
Low
0.3 mA
Valid VID
V
REF
Undervoltage Lockout
Yes
Depends on output voltage level
Low
0.3 mA
Power On
PWRLS Out of Range
No
Low
High
Not Affected
Not Affected
APPLICATIONS INFORMATION
1. Setting Converter Operating Frequency
The total resistance from R
OSC
to ground sets the
operating frequency for each phase of the converter. The
frequency can be set for either the three phase or four phase
mode by using Figure 7, “Oscillator Frequency versus Total
R
OSC
Value.” After choosing the desired operating
frequency and the number of phases, use the figure to
determine the necessary resistance. If two phase operation
is desired, use the value given for four phase operation.
The voltage from R
OSC
is closely regulated at 1 V. This
voltage can be used as the reference for the overcurrent limit
set point on the I
LIM
pin. Design a voltage divider with the
appropriate division ratio to give the desired I
LIM
voltage
and total resistance to set the operating frequency. Since
loading by the I
LIM
pin is very small, the frequency selection
will not be affected.
2. Output Capacitor Selection
The output capacitors filter the current from the output
inductor and provide a low impedance for transient load
current changes. Typically, microprocessor applications
require both bulk (electrolytic, tantalum) and low
impedance, high frequency (ceramic) types of capacitors.
The bulk capacitors provide “hold up” during transient
loading. The low impedance capacitors reduce steadystate
ripple and bypass the bulk capacitance when the output
current changes very quickly. The microprocessor
manufacturers usually specify a minimum number of
ceramic capacitors. The designer must determine the
number of bulk capacitors.
Choose the number of bulk output capacitors to meet the
peak transient requirements. The formula below can be used
to provide a starting point for the minimum number of bulk
capacitors (N
OUT,MIN
):
NOUT,MIN
ESR per capacitor
IO,MAX
VO,MAX
(1)
In reality, both the ESR and ESL of the bulk capacitors
determine the voltage change during a load transient
according to:
VO,MAX
Unfortunately, capacitor manufacturers do not specify the
ESL of their components and the inductance added by the
PCB traces is highly dependent on the layout and routing.
Therefore, it is necessary to start a design with slightly more
than the minimum number of bulk capacitors and perform
transient testing or careful modeling/simulation to
determine the final number of bulk capacitors.
The latest Intel processor specifications discuss “dynamic
VID” (DVID), in which the VID codes are stepped up or
down to a new desired output voltage. Due to the timing
requirements at which the output must be in regulation, the
output capacitor selection becomes more complicated. The
ideal output capacitor selection has low ESR and low
capacitance. Too much output capacitance will make it
difficult to meet DVID timing specifications; too much ESR
will complicate the transient solution. The Sanyo 4SP560M
and Panasonic EEUFL provide a good balance of
capacitance vs. ESR.
( IO,MAX
t)
ESL
IO,MAX
ESR
(2)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| NCP5318 | Two/Three/Four−Phase Buck CPU Controller |
| NCP5318FTR2 | Two/Three/Four−Phase Buck CPU Controller |
| NCP5318FTR2G | Two/Three/Four−Phase Buck CPU Controller |
| NCP5322ADWG | Two−Phase Buck Controller with Integrated Gate Drivers and 5−Bit DAC |
| NCP5322ADWR2G | Two−Phase Buck Controller with Integrated Gate Drivers and 5−Bit DAC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| NCP5314MNR2 | 功能描述:IC CTRLR BUCK CPU 2/3/4PH 32QFN RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,000 系列:- 應(yīng)用:電源，ICERA E400，E450 輸入電壓:4.1 V ~ 5.5 V 輸出數(shù):10 輸出電壓:可編程 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:42-WFBGA，WLCSP 供應(yīng)商設(shè)備封裝:42-WLP 包裝:帶卷 (TR) |
| NCP5316 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Four/Five/Six−Phase Buck CPU Controller |
| NCP5316/D | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Four/Five/Six-Phase Buck CPU Controller |
| NCP5316_06 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Four/Five/Six−Phase Buck CPU Controller |
| NCP5316FTR2 | 功能描述:IC CTRLR BUCK CPU 4/5/6PH 48LQFP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,000 系列:- 應(yīng)用:電源，ICERA E400，E450 輸入電壓:4.1 V ~ 5.5 V 輸出數(shù):10 輸出電壓:可編程 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:42-WFBGA，WLCSP 供應(yīng)商設(shè)備封裝:42-WLP 包裝:帶卷 (TR) |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。