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参数资料
| 型号： | L6711 |
| 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： | 19/50页 |
| 文件大小： | 679K |
| 代理商： | L6711 |
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Voltage positioning
L6711
26/50
Offset resistor can be designed by considering the following relationship (RFB is fixed by the
Droop effect):
Offset automatically given by the DAC selection or by VID5 when VID_SEL=SGND differs
from the offset implemented through the OFFSET pin: the built-in feature is trimmed in
production and assures ±0.5% error (±0.6% for the Hammer DAC) over load and line
variations while implementing the same offset through the OFFSET pin causes additional
errors to be considered in the total output voltage precision.
When the Integrated Thermal Sensor is enabled (see Figure 11 and following section), the
pin programs, in the same way as before, a negative offset. This is to compensate the
positive native offset introduced by the ITS. The effect of the programmed offset on the
output voltage results (IOFFSET is now added to IFB and no more subtracted as before):
Offset resistor is designed to compensate the ITS native offset as described in the following
section.
The Offset function can be disabled by shorting the pin to SGND.
Figure 11.
Voltage positioning with integrated thermal sensor
10.3
Integrated thermal sensor
Current sense elements have non-negligible temperature variations: considering either
inductor or LS mosfet sense, the sensing elements modify proportionally to varying
temperature. As a consequence, the sensed current is subjected to a measurement error
that causes the regulated voltage to vary accordingly.
To recover from this temperature related error, a temperature compensation circuit is
integrated into the controller: the internal temperature is sensed and the droop current is
corrected (according to a scaling external resistor RTC) in order to keep constant the
regulated voltage.
R
OFFSET
1.240V
V
OS
------------------- RFB
=
V
OUT
VID
R
FB
I
OFFSET
–
VID
R
FB
1.240
R
OFFSET
------------------------
–
VID
V
OS
–
==
=
1.240V
I OFFET
I TC
1:1
VTC=A+B(TJ-25)
RTC
ROFFSET
OFFSET
TC
1:1
IDROOP
VID
FB
COMP
I
FB
VSEN
64k
FBR
FBG
64k
RF
CF
RFB
To Vcore
(Remote Sense)
IOFFSET
I TC
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相关代理商/技术参数 |
参数描述 |
|---|---|
| L6711_06 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:3 Phase controller with dynamic VID and selectable DACs |
| L6711TR | 功能描述:DC/DC 开关控制器 3 PHASE CONTROLLER RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| 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 |
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