參數(shù)資料
型號(hào)： L6919ETR
廠商： 意法半導(dǎo)體
英文描述： 5 BIT PROGRAMMABLE DUAL-PHASE CONTROLLER WITH DYNAMIC VID MANAGEMENT
中文描述： 5位可編程雙相與動(dòng)態(tài)VID管理控制器
文件頁(yè)數(shù)： 13/33頁(yè)
文件大小： 606K
代理商： L6919ETR
13/33
L6919E
Figure 6. Constant Current operation
In this particular situation, the switching frequency results reduced. The ON time is the maximum allowed
(T
onMAX
) while the OFF time depends on the application:
Ipeak
I
–
V
OUT
Over current is set anyway when I
INFOx
reaches 35
μ
A (I
FB
= 70
μ
A). The full load value is only a convention
to work with convenient values for I
FB
. Since the OCP intervention threshold is fixed, to modify the percent-
age with respect to the load value, it can be simply considered that, for example, to have on OCP threshold
of 170%, this will correspond to I
INFOx
= 35
μ
A (I
FB
= 70
μ
A). The full load current will then correspond to
I
INFOx
= 20.6
μ
A (I
FB
= 41.1
μ
A).
Integrated Droop Function
The device uses a droop function to satisfy the requirements of high performance microprocessors, reducing
the size and the cost of the output capacitor.
This method "recovers" part of the drop due to the output capacitor ESR in the load transient, introducing a de-
pendence of the output voltage on the load current
As shown in figure 7, the ESR drop is present in any case, but using the droop function the total deviation of the
output voltage is minimized. In practice the droop function introduces a static error (V
DROOP
in figure 8) propor-
tional to the output current. Since the device has an average current mode regulation, the information about the
total current delivered is used to implement the Droop Function.
This current (equal to the sum of both I
INFOx
) is sourced from the FB pin. Connecting a resistor between this pin
and V
OUT
, the total current information flows only in this resistor because the compensation network between
FB and COMP has always a capacitor in series (See fig. 8). The voltage regulated is then equal to:
V
OUT
= V
ID
- R
FB
· I
FB
Since I
FB
depends on the current information about the two phases, the output characteristic vs. load current is
given by:
a) Maximum current for each phase
b) Output Characteristic
TonMAX
TonMAX
I
OCPx
Ipeak
I
MAX
Vout
Iout
(I
FB
=50
μ
A)
I
OCP
=2·I
OCPx
(I
FB
=70
μ
A)
I
MAX,TOT
UVP
Droop effect
T
OFF
L
-------------------------------------
=
f
T
ONmax
T
OFF
+
------------------------------------------
=
V
OUT
VID
R
FB
R
Rg
---------------------
I
OUT
–
=
相關(guān)PDF資料
PDF描述
L6924D Li-Ion/Li-Polymer Battery Charger System with Integrated Power Switch
L6928 High efficiency monolithic synchronous step down regulator
L6928Q1 High efficiency monolithic synchronous step down regulator
L6928TQ1TR High efficiency monolithic synchronous step down regulator
L6928TR High efficiency monolithic synchronous step down regulator
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L-692 制造商:RHOMBUS-IND 制造商全稱:Rhombus Industries Inc. 功能描述:Common Mode Inductor
L6920 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:1V HIGH EFFICIENCY SYNCRONOUS STEP UP CONVERTER
L6920D 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 0.6 to 5.5V Step-Up RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
L6920DB 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 Synchronous Rectifer Step Up Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
L6920DBTR 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 SYNCRONOUS RECT. STEP UP CONVERTER RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*