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參數(shù)資料
| 型號： | L6714 |
| 廠商： | 意法半導體 |
| 英文描述： | 4 phase controller with embedded drivers for Intel VR10, VR11 and AMD 6Bit CPUs |
| 中文描述： | 4英特爾VR10，VR11和AMD的6位嵌入式CPU的司機相控制器 |
| 文件頁數(shù)： | 61/70頁 |
| 文件大?。?/td> | 572K |
| 代理商： | L6714 |
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L6714
Tolerance band (TOB) definition
61/70
23
Tolerance band (TOB) definition
Output voltage load-line varies considering component process variation, system
temperature extremes, and age degradation limits. Moreover, individual tolerance of the
components also varies among designs: it is then possible to define a Manufacturing
Tolerance Band (TOB
Manuf
) that defines the possible output voltage spread across the
nominal load line characteristic.
TOB
Manuf
can be sliced into different three main categories: Controller Tolerance, External
Current Sense Circuit Tolerance and Time Constant Matching Error Tolerance. All these
parameters can be composed thanks to the RSS analysis so that the manufacturing
variation on TOB results to be:
Output voltage ripple (V
P
= V
PP
/2) and temperature measurement error (V
TC
) must be
added to the Manufacturing TOB in order to get the system Tolerance Band as follow:
All the component spreads and variations are usually considered at 3
σ
. Here follows an
explanation on how to calculate these parameters for a reference L6714 application.
23.1
Controller tolerance (TOB controller)
It can be further sliced as follow:
Reference tolerance. L6714 is trimmed during the production stage to ensure the
output voltage to be within k
VID
= ±0.5% (±0.6% for AMD DAC) over temperature and
line variations. In addition, the device automatically adds a -19mV offset (Only for Intel
Mode) avoiding the use of any external component. This offset is already included
during the trimming process in order to avoid the use of any external circuit to generate
this offsets and, moreover, avoiding the introduction of any further error to be
considered in the TOB calculation.
Current Reading Circuit. The device reads the current flowing across the MOSFET
RdsON or the inductor DCR by using its dedicated differential inputs. The current
sourced by the VRD is then reproduced and sourced from the DROOP pin scaled down
by a proper designed gain as follow:
R
---------------------
=
●
●
This current multiplied by the R
FB
resistor connected from FB pin vs. the load allows
programming the droop function according to the selected R
L
/Rg gain and R
FB
resistor.
Deviations in the current sourced due to errors in the current reading, impacts on the output
voltage depending on the size of R
FB
resistor. The device is trimmed during the production
stage in order to guarantee a maximum deviation of k
IFB
= ±1
μ
A from the nominal value.
Controller tolerance results then to be:
TOB
Manuf
TOB
Controller
2
TOB
CurrSense
2
TOB
TCMatching
2
+
+
=
TOB
TOB
Manuf
V
P
V
TC
+
+
=
I
DROOP
Rg
I
OUT
TOB
Controller
VID
19mV
–
(
)
k
VID
[
]
2
k
IDROOP
R
FB
(
)
2
+
=
相關PDF資料 |
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|---|---|
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| L6726A | Single phase PWM controller |
| L6726ATR | Single phase PWM controller |
| L6727 | Single phase PWM controller |
| L6727TR | Single phase PWM controller |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| L6714TR | 功能描述:功率驅動器IC 4 Phase Controller RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| L6716 | 制造商:STMicroelectronics 功能描述:DC DC Cntrlr Quad-OUT Sync Step Down 48-Pin VFQFPN EP Tray 制造商:STMicroelectronics 功能描述:HANDHELD & COMPUTER PM - Trays 制造商:STMicroelectronics 功能描述:2/3/4 Phase Controlr Embedded Driver |
| L6716TR | 功能描述:開關變換器、穩(wěn)壓器與控制器 2/3/4 phase CNTRL Embedded Drivers RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| L6717 | 制造商:STMicroelectronics 功能描述:High-Efficiency Hybrid AM2r2 Controller 48-Pin VFQFPN Tray 制造商:STMicroelectronics 功能描述:HANDHELD & COMPUTER PM - Trays 制造商:STMicroelectronics 功能描述:High EFF Hybrid CTRL I2C Embedded Driver |
| L6717A | 制造商:STMicroelectronics 功能描述:CPU Power Supply Controller Tray 制造商:STMicroelectronics 功能描述:HANDHELD & COMPUTER PM - Trays 制造商:STMicroelectronics 功能描述:High EFF Hybrid CTRL I2C Embedded Driver |
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