參數(shù)資料
型號： L6740L
廠商： 意法半導(dǎo)體
英文描述： Hybrid controller (4+1) for AMD SVID and PVID processors
中文描述： 混合控制器（4 1對AMD SVID和PVID）處理器
文件頁數(shù)： 35/44頁
文件大小： 657K
代理商： L6740L
L6740L
Output voltage monitoring and protections
35/44
rent operation since the current ripple increases. In fact, the ON time increases due to the
OFF time rise because of the current has to reach the I
OCP_NB
bottom. The worst-case con-
dition is when the ON time reaches its maximum value (see
Section 6.8
). When this hap-
pens, the Section works in Real Constant Current and the output voltage decrease as the
load increase. Crossing the UV threshold causes the device to latch accordingly.
It can be observed that the peak current (I
PEAK_NB
) is greater than I
OCP_NB
but it can be
determined as follow:
V
V
–
L
NB
Where V
OUT(min)
is the UV threshold, (inductor saturation must be considered). When that
threshold is crossed, UV is detected. Cycle the power supply or the EN pin to restart opera-
tion.
The maximum average current during the Constant-Current behavior results (see
Figure 14
):
in this particular situation, the switching frequency for the NB Section results reduced. The
ON time is the maximum allowed T
ON(max)
while the OFF time depends on the application:
The transconductance resistor R
ISEN
can be designed considering that the Section limits
the inductor current ripple valley. Moreover the additional current due to the output filter
charge during on-the-Fly VID transitions must be considered.
where I
OCP_NB
is defined above.
Figure 14.
NB Section - Constant current operation.
I
PEAK_NB
I
OCP_NB
---------------------------------------
T
ON(max)
+
I
OCP_NB
V
---------–
0.40 T
V
L
NB
SW
+
=
=
I
MAX_NB
I
OCP_NB
I
---------------–
I
2
+
=
T
OFF
L
NB
I
-----------------–
I
V
OUT
=
f
T
ON(max)
T
OFF
+
------------------------------------------
=
R
ISEN
I
R
I
OCTH_NB(min)
-----------------------------------------------------------------
=
V
OUT
0.40 V
IN
Constant Current (Exploded)
I
OCP_NB
(I
DROOP_NB
μ
A)
I
OUT
UVP Threshold
Voltage Positioning
I
MAX_NB
Droop Effect
Q
C
T
ON(max)
T
ON(max)
I
OCP_NB
I
MAX_NB
I
PEAK_NB
LS ON Skipping
Clock Cycles
T
SW
T
SW
相關(guān)PDF資料
PDF描述
L6740LTR Hybrid controller (4+1) for AMD SVID and PVID processors
L6741 High current MOSFET driver
L6741TR High current MOSFET driver
L6743 High current MOSFET driver
L6743Q High current MOSFET driver
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L6740LTR 功能描述:DC/DC 開關(guān)控制器 Hybrid controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
L6741 功能描述:功率驅(qū)動器IC SnglPphase Dual MOSFET Driver 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(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube
L6741TR 功能描述:功率驅(qū)動器IC SnglPphase Dual MOSFET Driver 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(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube
L6743 功能描述:功率驅(qū)動器IC SnglPphase Dual MOSFET Driver 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(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube
L6743_08 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:High current MOSFET driver
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