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參數資料
| 型號： | NCP5318FTR2 |
| 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, 1000 kHz SWITCHING FREQ-MAX, PQFP32 |
| 封裝： | LQFP-32 |
| 文件頁數： | 16/31頁 |
| 文件大?。?/td> | 384K |
| 代理商： | NCP5318FTR2 |
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NCP5318
http://onsemi.com
16
For the converter described above with 4 phases and 85%
efficiency at 100 A full load, the Error Amplifier output
changes by:
(25 mV
3.0 V V
14.8 mV)
2
(1
0.85)
0.85
VCOMP
1.0 m
3.0 V
V
100 A
4
83 mV
Additionally, if the “Droop” feature is used, the output
voltage change resulting from the synthesized, closed loop
output impedance (referred to as the output loadline) is as
follows:
V
RLL
IOUT
where R
LL
is the value, in ohms, of the output loadline.
Summation of this change at the PWM comparator input
forces the Error Amplifier output voltage to respond with an
identical change which always opposes that forced by the
sensed current previously described, which reduces the
amount of Error Amplifier output movement required.
Figure 18 shows the open loop response of the PWM
comparator and resulting phase current upon an output
voltage dip. Before T1, the converter is in steady
state
operation. The inductor current provides a portion of the
PWM ramp through the current sense amplifier. The PWM
cycle ends when the sum of the current ramp, the “partial”
internal ramp, the offset and the output voltage exceeds the
level of the COMP pin. At T1, the load current increases and
the output voltage sags. The next PWM cycle begins and the
cycle continues longer than before until T2, when the current
signal has increased enough to make up for the lower voltage
at the VFB pin. After T2, the output voltage remains lower,
and the average current signal level (CSA output) is raised
so that the sum of the current and voltage signal is the same
as with the original load. In a closed loop system, the COMP
pin would move higher to restore the output voltage to the
original level.
SWNODE
V
FFB
(V
OUT
)
Internal Ramp
CSA Out
COMP
CSA Output +
Internal Ramp +
Offset + CSxN
T1
T2
Figure 18. Open Loop Operation
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PDF描述 |
|---|---|
| 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 |
| NCP5331FTR2G | Two-Phase PWM Controller with Integrated Gate Drivers |
| NCP5331 | Two-Phase PWM Controller with Integrated Gate Drivers |
相關代理商/技術參數 |
參數描述 |
|---|---|
| NCP5318FTR2G | 功能描述:DC/DC 開關控制器 2/3/4 Phase Buck CPU RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| NCP5322A | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Two−Phase Buck Controller with Integrated Gate Drivers and 5−Bit DAC |
| NCP5322A/D | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Two-Phase Buck Controller with integrated Gate Drivers and 5-Bit DAC |
| NCP5322A_07 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Two−Phase Buck Controller with Integrated Gate Drivers and 5−Bit DAC |
| NCP5322ADW | 功能描述:DC/DC 開關控制器 2 Phase Buck w/Gate RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
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