參數(shù)資料
型號(hào)： L6711TR
廠商： STMICROELECTRONICS
元件分類(lèi)： 穩(wěn)壓器
英文描述： 2 A SWITCHING CONTROLLER, 178 kHz SWITCHING FREQ-MAX, PQFP48
封裝： 7 X 7 MM, 1 MM HEIGHT, TQFP-48
文件頁(yè)數(shù)： 19/50頁(yè)
文件大?。?/td> 679K
代理商： L6711TR
Obsolete
Product(s)
- Obsolete
Product(s)
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
相關(guān)PDF資料
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
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L6712A 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:TWO-PHASE INTERLEAVED DC/DC CONTROLLER
L6712AD 功能描述:開(kāi)關(guān)變換器、穩(wěn)壓器與控制器 2-Ph Interleaved RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開(kāi)關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
L6712ADTR 功能描述:開(kāi)關(guān)變換器、穩(wěn)壓器與控制器 2-Ph Interleaved RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開(kāi)關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
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