- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄384585 > L6711 (意法半導(dǎo)體) 3 PHASE CONTROLLER WITH DYNAMIC VID AND SELECTABLE DACs PDF資料下載
參數(shù)資料
| 型號： | L6711 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 3 PHASE CONTROLLER WITH DYNAMIC VID AND SELECTABLE DACs |
| 中文描述： | 3相控制器，動態(tài)VID和可選數(shù)模轉(zhuǎn)換器 |
| 文件頁數(shù)： | 25/38頁 |
| 文件大?。?/td> | 591K |
| 代理商： | L6711 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁當(dāng)前第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁
25/38
L6711
13.1 LS MOSFET SENSE (CS_SEL=OPEN) OVERCURRENT
The device detects an Over Current condition for each phase when the current information I
INFOx
over-
comes the fixed threshold of I
OCTH
(35
μ
A Typ). When this happens, the device keeps the relative LS mos-
fet on, skipping clock cycles, until the threshold is crossed back and IINFOx results being lower than the
I
OCTH
threshold. This implies that the device limits the bottom of each inductor current ripple.
After exiting the OC condition, the LS mosfet is turned off and the HS is turned on with a duty cycle driven
by the PWM comparator.
Keeping the LS on, skipping clock cycles, causes the on-time subsequent to the exit from the OC condition
to increase. Considering now that the device, with this kind of current sense, has maximum on-time de-
pendence with the delivered current given by the following relationship:
Where I
OUT
is the output current (I
OUT
=
Σ
·I
PHASEx
) and T
SW
is the switching period (T
SW
=1/F
SW
).
This linear dependence has a value at zero load of 0.80 ·T
SW
and at maximum current of 0.40 ·T
SW
typical
and results in two different over current behaviors of the device:
13.2 TON Limited Output Voltage.
This happens when the maximum ON time is reached before that the current in each phase reaches IO
CPx
(I
INFOx
<I
OCTH
). Figure 18 shows the maximum output voltage that the device is able to regulate consider-
ing the T
ON
limitation imposed by the previous relationship. If the desired output characteristic crosses the
T
ON
limited maximum output voltage, the output resulting voltage will start to drop after the crossing.
In this case, the device doesn't perform constant current limitation but only limits the maximum ON time
following the previous relationship. The output voltage starts to decrease follows the resulting character-
istic (dotted in Figure 18) until UVP is detected or anyway until I
DROOP
=105
μ
A.
Figure 18. TON Limited Operation
13.2.1Constant Current Operation
This happens when the on-time limitation is reached after the valley current in each phase reaches I
OCPx
(I
INFOx
> I
OCTH
).
The device enters in Quasi-Constant-Current operation: the low-side mosfets stays ON until the current
read becomes lower than I
OCPx
(I
INFOx
< I
OCTH
) skipping clock cycles. The high side mosfet can be then
turned ON with a T
ON
imposed by the control loop after the LS turn-off and the device works in the usual
way until another OCP event is detected.
This means that the average current delivered can slightly increase in Quasi-Constant-Current operation
T
ON,MAX
0.80
I
DROOP
–
3.8k
(
)
T
SW
0.80
R
Rg
---------------------
I
OUT
3.8k
–
T
SW
=
0.80 T
SW
I
DROOP
0.40 T
SW
I
DROOP
0
μ
A
105
μ
A
=
=
=
=
0.80·V
IN
0.40·V
IN
V
OUT
I
OUT
I
OCP
=3·I
OCPx
(I
DROOP
=105
μ
A)
T
ON
Limited Output
characteristic
0.80·V
IN
0.40·V
IN
V
OUT
I
OUT
I
OCP
=3·I
OCPx
(I
DROOP
=105
μ
A)
Desired Output
characteristic
and
UVP threshold
Resulting Output
characteristic
Maximum output Voltage b) TON Limited Output Voltage
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| L6711TR | 3 PHASE CONTROLLER WITH DYNAMIC VID AND SELECTABLE DACs |
| L6714 | 4 phase controller with embedded drivers for Intel VR10, VR11 and AMD 6Bit CPUs |
| 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 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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 |
| L6712A | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:TWO-PHASE INTERLEAVED DC/DC CONTROLLER |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。