參數(shù)資料
型號： L6918ADTR
廠商： 意法半導體
英文描述： 5 BIT PROGRAMMABLE MULTIPHASE CONTROLLER
中文描述： 5位可編程多相控制器
文件頁數(shù)： 24/35頁
文件大?。?/td> 760K
代理商： L6918ADTR
L6918 L6918A
24/35
while placing the zero in correspondence with the L-C resonance a simple -20dB/dec shape of the gain is as-
sured (See Figure 15). In fact, considering the usual value for the output filter, the LC resonance results to be
at frequency lower than the above reported zero.
Figure 15. ACM Control Loop Gain Block Diagram (left) and Bode Diagram (right).
Compensation network can be simply designed placing
ω
Z
=
ω
LC
and imposing the cross-over frequency
ω
T
as
desired obtaining:
In a four phase operation (since the four phase converter is realized by two dual phase converters in parallel
that shares current using droop), also the other sub-system in parallel must be considered. In particular, in the
above reported relationships, it must be considered with Co and ESR the total output capacitance and equiva-
lent ESR while the output impedance Zo of the other sub-system must be considered in parallel to the output
capacitance Co and to the load Ro.
The output impedance of the other sub-system in parallel results:
Considering Zo in parallel to Ro, it can be verified that the R
F
and C
F
design relationships are still valid.
LAYOUT GUIDELINES
Since the device manages control functions and high-current drivers, layout is one of the most important things
to consider when designing such high current applications.
A good layout solution can generate a benefit in lowering power dissipation on the power paths, reducing radi-
ation and a proper connection between signal and power ground can optimize the performance of the control
loops.
Integrated power drivers reduce components count and interconnections between control functions and drivers,
reducing the board space.
Here below are listed the main points to focus on when starting a new layout and rules are suggested for a cor-
rect implementation.
dB
ω
ω
T
ω
Z
ω
LC
G
LOOP
Z
F
(s)
K
K
4
5
--
V
osc
---------------
FB
----------
dB
=
Rout
Cout
ESR
L/2
R
FB
R
F
C
F
REF
PWM
I
FB
V
COMP
V
OUT
d
V
IN
Z
F
R
F
R
V
IN
----------------------------------
5
4
--
ω
T
DROOP
)
-----------------------------------+
=
C
F
Co
L
2
--
F
-------------------
=
Zo s
Z
L
s
-----------------------------------------------------------------------------------------------
( )
4
5
--
V
4
5
--
OSC
------------------
FB
----------------------
Z
F
s
( )
+
1
------------------
--------------
+
=
相關(guān)PDF資料
PDF描述
L6918D 5 BIT PROGRAMMABLE MULTIPHASE CONTROLLER
L6918DTR 5 BIT PROGRAMMABLE MULTIPHASE CONTROLLER
L6919C 5 BIT PROGRAMMABLE DUAL-PHASE CONTROLLER WITH DYNAMIC VID MANAGEMENT
L6919CD 5 BIT PROGRAMMABLE DUAL-PHASE CONTROLLER WITH DYNAMIC VID MANAGEMENT
L6919CDTR CAP 20PF 50V 5% C0G SMD-0805 TR-7-PL SN100
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L6918D 功能描述:DC/DC 開關(guān)控制器 Prog Multi-Phase Cnt 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 安裝風格: 封裝 / 箱體:CPAK
L6918DTR 功能描述:DC/DC 開關(guān)控制器 Prog Multi-Phase Cnt 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 安裝風格: 封裝 / 箱體:CPAK
L6919 制造商:未知廠家 制造商全稱:未知廠家 功能描述:5 BIT PROGRAMMABLE DUAL-PHASE CONTROLLER WITH DYNAMIC VID MANAGEMENT
L6919C 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5 BIT PROGRAMMABLE DUAL-PHASE CONTROLLER WITH DYNAMIC VID MANAGEMENT
L6919CD 功能描述:DC/DC 開關(guān)控制器 Prog Dual-Phase Cont 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 安裝風格: 封裝 / 箱體:CPAK
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