參數(shù)資料
型號(hào)： L6710TR
廠商： STMICROELECTRONICS
元件分類： 穩(wěn)壓器
英文描述： 2 A SWITCHING CONTROLLER, PQFP44
封裝： 10 X 10 MM, 1 MM HEIGHT, TQFP-44
文件頁數(shù)： 15/34頁
文件大?。?/td> 1610K
代理商： L6710TR
L6710
22/34
Considering now that in the application of interest it can be assumed that Ro>>RL; ESR<<Ro and
RDROOP<<Ro, it results:
The ACM control loop gain is designed to obtain a high DC gain to minimize static error and cross the 0dB
axes with a constant -20dB/dec slope with the desired crossover frequency
ωT. Neglecting the effect of
ZF(s), the transfer function has one zero and two poles. Both the poles are fixed once the output filter is
designed and the zero is fixed by ESR and the Droop resistance. To obtain the desired shape an RF-CF
series network is considered for the ZF(s) implementation. A zero at
ωF=1/RFCF is then introduced togeth-
er with an integrator. This integrator minimizes the static error while placing the zero in correspondence
with the L-C resonance a simple -20dB/dec shape of the gain is assured (See Figure 15). In fact, consid-
ering the usual value for the output filter, the LC resonance results to be at frequency lower than the above
reported zero.
Compensation network can be simply designed placing
ωZ= ωLC and imposing the cross-over frequency
T as desired obtaining:
Figure 15. ACM Control Loop Gain Block Diagram (left) and Bode Diagram (right).
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
radiation 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 correct implementation.
G
LOOP s
()
4
5
---
V
IN
V
OSC
-------------------
Z
F s
()
R
FB
---------------
1s Co
R
DROOP
ESR
+
()
+
s
2
Co
L
2
---
s
L
2Ro
---------------
Co ESR
Co
R
L
2
-------
+
+
1
+
+
----------------------------------------------------------------------------------------------------------------------------------
–
=
R
F
R
FB
V
OSC
V
IN
----------------------------------
5
4
---
ω
T
L
2R
DROOP
ESR
+
()
-------------------------------------------------------
C
F
Co
L
2
---
R
F
--------------------
=
=
Rout
Cout
ESR
L/2
RFB
RF
CF
REF
PWM
IFB
VCOMP
VOUT
d
VIN
ZF
dB
ω
ωT
ωZ
ωLC
GLOOP
ZF(s)
K
dB
FB
OSC
IN
R
1
V
5
4
K
=
相關(guān)PDF資料
PDF描述
L6713ATR 2 A SWITCHING CONTROLLER, 225 kHz SWITCHING FREQ-MAX, PQFP64
L6716TR DUAL SWITCHING CONTROLLER, 225 kHz SWITCHING FREQ-MAX, QCC48
L6716 DUAL SWITCHING CONTROLLER, 225 kHz SWITCHING FREQ-MAX, QCC48
L6722 SWITCHING CONTROLLER, 300 kHz SWITCHING FREQ-MAX, QCC36
L6722TR SWITCHING CONTROLLER, 300 kHz SWITCHING FREQ-MAX, QCC36
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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L6711_06 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3 Phase controller with dynamic VID and selectable DACs
L6711TR 功能描述:DC/DC 開關(guān)控制器 3 PHASE 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
L6712 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:TWO-PHASE INTERLEAVED DC/DC CONTROLLER
L6712_05 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:TWO-PHASE INTERLEAVED DC/DC CONTROLLER
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