- 您现在的位置：买卖IC网 > PDF目录97995 > L6711TR (STMICROELECTRONICS) 2 A SWITCHING CONTROLLER, 178 kHz SWITCHING FREQ-MAX, PQFP48 PDF资料下载
参数资料
| 型号： | L6711TR |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | 2 A SWITCHING CONTROLLER, 178 kHz SWITCHING FREQ-MAX, PQFP48 |
| 封装： | 7 X 7 MM, 1 MM HEIGHT, TQFP-48 |
| 文件页数： | 13/50页 |
| 文件大小： | 679K |
| 代理商： | L6711TR |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页当前第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页
Obsolete
Product(s)
- Obsolete
Product(s)
Current reading and current sharing control loop
L6711
20/50
50
A offset allows negative current reading, enabling the device to check for dangerous
returning current between the phases assuring the complete current equalization. From the
current information of each phase, information about the total current delivered (IDROOP =
IINFO1 + IINFO2 + IINFO3) and the average current for each phase (IAVG = (IINFO1 + IINFO2 +
IINFO3)/3 ) is taken. IINFOX is then compared to IAVG to give the correction to the PWMx
output in order to equalize the current carried by the three phases.
Figure 6.
Current reading across LS mosfet: timing (left) and circuit (right) for each
phase.
7.2
Inductor current reading
Shorting CS_SEL pin to SGND, the current flowing trough each phase is read using the
voltage drop across the output inductor or across a sense resistor (RSENSE) in its series and
internally converted into a current. The transconductance ratio is issued by the external
resistor Rg placed outside the chip between CSx- and CSx+ pins toward the reading points
(see Figure 5 right).
The current sense circuit always tracks the current sensed and still sources a constant 50
A
current from the CSx+ pin: this pin is used as a reference keeping the CSx- pin to this
voltage. To correctly reproduce the inductor current an R-C filtering network must be
introduced in parallel to the sensing element.
The current that flows from the CSx- pin is then given by the following equation (See Figure
7):
Where IPHASEx is the current carried by the relative phase.
Considering now to match the time constant between the inductor and the R-C filter applied
(Time constant mismatches cause the introduction of poles into the current reading network
causing instability. Moreover, it is also important for the load transient response and to let
the system show resistive equivalent output impedance), it results:
where
IINFOx is the current information reproduced internally.
50
A offset allows negative current reading, enabling the device to check for dangerous
returning current between the phases assuring the complete current equalization. From the
000000000
IPHASEx
ILSx
IINFOx
TTRACK
TSW
CSx+
CSx-
LGATEx
IPHASEx
50
A
ICSx-
Rg
I
CSx-
50
A
R
L
R
g
-------
1s
L
R
L
-------
+
1s R
gR C
() Cg
+
------------------------------------------------
I
PHASEx
+
=
R
gRC
() Cg
I
CSx-
≥
50
A
R
L
Rg
-------- IPHASEx
+
50
AI
INFOx
+
==
I
INFOx
I
PHASEx
R
L
Rg
--------
=
相关PDF资料 |
PDF描述 |
|---|---|
| L6711 | 2 A SWITCHING CONTROLLER, 178 kHz SWITCHING FREQ-MAX, PQFP48 |
| L6714TR | SWITCHING CONTROLLER, 170 kHz SWITCHING FREQ-MAX, PQFP64 |
| L6714 | SWITCHING CONTROLLER, 170 kHz SWITCHING FREQ-MAX, PQFP64 |
| L6725TR | 20 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16 |
| L6728ATR | SWITCHING CONTROLLER, 660 kHz SWITCHING FREQ-MAX, PDSO10 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| L6712 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:TWO-PHASE INTERLEAVED DC/DC CONTROLLER |
| L6712_05 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:TWO-PHASE INTERLEAVED DC/DC CONTROLLER |
| L6712A | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:TWO-PHASE INTERLEAVED DC/DC CONTROLLER |
| L6712AD | 功能描述:开关变换器、稳压器与控制器 2-Ph Interleaved RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| L6712ADTR | 功能描述:开关变换器、稳压器与控制器 2-Ph Interleaved RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
发布紧急采购，3分钟左右您将得到回复。