參數(shù)資料
型號(hào)： L6714
廠商： 意法半導(dǎo)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(jī)相控制器
文件頁(yè)數(shù)： 33/70頁(yè)
文件大小： 572K
代理商： L6714
L6714
Current reading and current sharing loop
33/70
10.1
Low side current reading
When reading current across LS, the current flowing trough each phase is read using the
voltage drop across the low side MOSFET R
dsON
or across a sense resistor in its series and
it is internally converted into a current. The trans-conductance ratio is issued by the external
resistor Rg placed outside the chip between CSx- and CSx+ pins toward the reading points.
The current sense circuit tracks the current information for a time T
TRACK
centered in the
middle of the LS conduction time and holds the tracked information during the rest of the
period.
L6714 sources a constant 25
μ
A bias current from the CSx+ pin: the current reading circuitry
uses this pin as a reference and the reaction keeps the CSx- pin to this voltage during the
reading time (an internal clamp keeps CSx+ and CSx- at the same voltage sinking from the
CSx- pin the necessary current during the hold time; this is needed to avoid absolute
maximum rating overcome on CSx- pin). The current that flows from the CSx- pin is then
given by (
See Figure 9
):
R
Rg
where R
dsON
is the ON resistance of the low side MOSFET and Rg is the trans-conductance
resistor used between CSx- and CSx+ pins toward the reading points; I
PHASEx
is the current
carried by the relative phase and I
INFOx
is the current information signal reproduced
internally.
25
μ
A offset allows negative current reading, enabling the device to check for dangerous
returning current between the phases assuring the complete current equalization.
10.2
Inductor current reading
When reading current across the inductor DCR, the current flowing trough each phase is
read using the voltage drop across the output inductor or across a sense resistor in its
series and internally converted into a current. The trans-conductance ratio is issued by the
external resistor Rg placed outside the chip between CSx- pin toward the reading points.
The current sense circuit always tracks the current information, no bias current is sourced
from the CSx+ pin: this pin is used as a reference keeping the CSx- pin to this voltage. To
correctly reproduce the inductor current an R-C filtering network must be introduced in
parallel to the sensing element.
The current that flows from the CSx- pin is then given by the following equation (
See
Figure 9
):
Where I
PHASEx
is the current carried by the relative phase.
I
CSx-
25
μ
A
-----------------
I
PHASEx
+
25
μ
A
I
INFOx
+
=
=
I
CSx-
R
L
Rg
-------
1
1
s
R
L
C
+
---+
I
PHASEx
=
相關(guān)PDF資料
PDF描述
L6714TR 4 phase controller with embedded drivers for Intel VR10, VR11 and AMD 6Bit CPUs
L6726A Single phase PWM controller
L6726ATR Single phase PWM controller
L6727 Single phase PWM controller
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L6714TR 功能描述:功率驅(qū)動(dòng)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(shí)間: 下降時(shí)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(fēng)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(kāi)關(guān)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(kāi)關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)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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