參數(shù)資料
型號： L6722TR
廠商： STMICROELECTRONICS
元件分類： 穩(wěn)壓器
英文描述： SWITCHING CONTROLLER, 300 kHz SWITCHING FREQ-MAX, QCC36
封裝： 6 X 6 MM, 1 MM PITCH, VFQFPN-36
文件頁數(shù)： 11/34頁
文件大?。?/td> 421K
代理商： L6722TR
Obsolete
Product(s)
- Obsolete
Product(s)
L6722
7 Output voltage positioning
19/34
Time constant matching between the inductor (L / DCR) and the current reading filter
(
) is required to implement a real equivalent output impedance of the system so
avoiding over and/or under shoot of the output voltage as a consequence of a load transient. In
fact, considering the scheme reported on Figure 9, it is possible to observe that:
By applying the time constant matching concept, it results:
=>
The device forces IDROOP = ICS x 3, proportional to the read current, into the feedback resistor
RFB implementing the load regulation dependence. The output characteristic vs. load current is
then given by (Offset disabled):
Where RLL is the resulting load-line resistance implemented by the system.
The whole power supply can be then represented by a "real" voltage generator with an
equivalent output resistance RLL and a voltage value of VID.
RFB resistor can be then designed according to the RLL specifications as follow:
Warning:
Droop function is operational for output voltages up to 1.8V.
Caution:
Droop function is optional, in case it is not desired, the Current Sense circuit can be tricked so
that the device always read a null current. To do this, it is enough connecting CS+ directly to the
output voltage leaving CS- unconnected. The reaction will keep CS+ and CS- at the same
voltage, always reading a null current and also assuring the FB disconnection protection to be
effective. To aovid setting the FB-disconnection protection, it is also suggested to connect CS+
to local-VOUT through the same resistor divider used as external divider (See Figure 1).
To disable also the FB disconnection protection, CS+ can be directly connected to VSEN or
SGND.
Figure 9.
Droop function current reading network
R
PH
C
PH
S
I
OUT
3
------------
1s
L
DCR
+
1s
R
PH
C
PH
3
+
-------------------------------------------------------------
DC
R
D
--------
=
L
DCR
-------------
R
PH
C
PH
3
------------------------------
=
I
CS
I
OUT
3
------------
DCR
R
D
-------------
=
OUT
VID
R
FB
I
DROOP
–
VID
R
FB
DCR
R
D
-------------
I
OUT
–
VID
R
LL
I
OU
–
==
=
R
FB
R
LL
R
D
DCR
-------------
=
L2
L1
L3
DCR1
DCR2
DCR3
CPH
R
PH
R
PH
R
PH
RD
PHASE3
PHASE2
PHASE1
VOUT
ICS
CS+
CS-
FB
IDROOP
x 3
RF
CF
RFB
COMP
L2
L1
L3
DCR1
DCR2
DCR3
PHASE3
PHASE2
PHASE1
VOUT
ICS
CS+
CS-
FB
IDROOP
x 3
RF
CF
RFB
COMP
Droop Function Enabled
Droop Function Disabled
R1
R2
相關(guān)PDF資料
PDF描述
L9407F SPECIALTY ANALOG CIRCUIT, PSFM8
L9942 STEPPER MOTOR CONTROLLER, PDSO36
LA5681FN SWITCHING CONTROLLER, 520 kHz SWITCHING FREQ-MAX, QCC48
LB11620T BRUSHLESS DC MOTOR CONTROLLER, 0.25 A, PDSO24
LB11875 BRUSHLESS DC MOTOR CONTROLLER, 0.03 A, PDSO36
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L6725 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 Vltg Mode PWM Controller 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
L6725_07 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Voltage mode PWM controller with bootstrap anti-discharging system
L6725A 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 Vltg Mode PWM Controller 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
L6725ATR 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 Step-Down Controller 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
L6725TR 功能描述:電壓模式 PWM 控制器 Adjustable Step Down Controller RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

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

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

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*