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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)： | 4/34頁 |
| 文件大?。?/td> | 1610K |
| 代理商： | L6710TR |
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L6710
12/34
Since the current is read in differential mode, also negative current information is kept; this allow the de-
vice to check for dangerous returning current between the two phases assuring the complete equalization
between the phase's currents. From the current information of each phase, information about the total cur-
rent delivered (IFB =IINFO1 + IINFO2) and the average current for each phase (IAVG = (IINFO1 + IINFO2)/2 )
is taken. IINFOX is then compared to IAVG to give the correction to the PWM output in order to equalize the
current carried by the two phases.
The transconductance resistor Rg can be designed in order to have current information of 25
A per phase
at full nominal load; the over current intervention threshold is set at 140% of the nominal (IINFOx = 35
A).
According to the above relationship, the over current threshold (IOCPx) for each phase, which has to be
placed at 1/2 of the total delivered maximum current, results:
Since the device senses the output current across the low-side mosfets (or across a sense resistors in
series with them) the device limits the bottom of the inductor current triangular waveform: an over current
is detected when the current flowing into the sense element is greater than IOCPx (IINFOx>35
A).
Introducing now the maximum ON time dependence with the delivered current (where T is the switching
period T=1/FSW):
Where IOUT is the output current.
This linear dependence has a value at zero load of 0.80T and at maximum current of 0.40T typical and
results in two different behaviors of the device:
Figure 3. Current reading timing (left) and circuit (right)
I
OC Px
35
ARg
R
SEN S E
---------------------------
Rg
I
OC Px
R
SEN SE
35
A
------------------------------------------
=
T
ON,MAX
0.80
I
FB
–
5.73k
() T0.80
R
SEN S E
Rg
---------------------- I
OUT
5.73k
–
T =
T
0.80 T I
FB
0
A
=
=
T
0.40 T I
FB
70
A
=
=
=
=
R
SE
N
S
E
Rg
50
A
IISEN1
I PH
A
SE1
Rg
LGATE1
ISEN1
PGNDS
Rg
50
A
100
A
I P
H
A
SE2
Rg
ISEN2
R
SEN
SE
IISEN2
TOTAL
CURRENT
INFO (IFB)
ILS1
ILS2
Track & Hold
IINFO2
IINFO1
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L6711 | 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 |
| 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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