- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄299014 > E-L6917BD (STMICROELECTRONICS) SWITCHING CONTROLLER, 600 kHz SWITCHING FREQ-MAX, PDSO28 PDF資料下載
參數(shù)資料
| 型號： | E-L6917BD |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, 600 kHz SWITCHING FREQ-MAX, PDSO28 |
| 封裝： | ROHS COMPLIANT, SO-28 |
| 文件頁數(shù)： | 5/33頁 |
| 文件大?。?/td> | 465K |
| 代理商： | E-L6917BD |
第1頁第2頁第3頁第4頁當(dāng)前第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁
13/33
L6917B
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 6, 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 (Vdroop in figure 6) 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 IINFOx)
is sourced from the FB pin. Connecting a resistor between this pin and Vout, 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. 7). The voltage regulated is then equal to:
VOUT =VID -RFB IFB
Since IFB depends on the current information about the two phases, the output characteristic vs. load current is
given by:
Figure 6. Output transient response without (a) and with (b) the droop function
Figure 7. Active Droop Function Circuit
The feedback current is equal to 50
A at nominal full load (IFB =IINFO1 +IINFO2) and 70A at the OC threshold,
so the maximum output voltage deviation is equal to:
VFULL_POSITIVE_LOAD=+RFB 50A
VPOSITIVE_OC_THRESHOLD=+RFB 70A
Droop function is provided only for positive load; if negative load is applied, and then IINFOx < 0, no current is
sunk from the FB pin. The device regulates at the voltage programmed by the VID.
V
OU T
VI D
R
FB
R
SENSE
Rg
---------------------- I
OUT
–
=
VMAX
VMIN
VNOM
(a)
(b)
ESR DROP
VDROOP
V
PROG
COMP
FB
To VOUT
I
FB
R
FB
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| E-L8150TR | BRUSHLESS DC MOTOR CONTROLLER, PDSO28 |
| E-L9935013TR | STEPPER MOTOR CONTROLLER, 2.5 A, PDSO20 |
| E1L33-3BOA6-02 | T-1 SINGLE COLOR LED, BLUE, 3 mm |
| E1L35-3G0A7-02 | T-1 SINGLE COLOR LED, GREEN, 3 mm |
| E1L35-3G0A5-02 | T-1 SINGLE COLOR LED, GREEN, 3 mm |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| E-L6917BDTR | 功能描述:DC/DC 開關(guān)控制器 Prog Dual-Phase Cont RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| E-L6919E | 功能描述:電流型 PWM 控制器 5-Bit Dual Ph Contlr RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| E-L6919ETR | 功能描述:電流型 PWM 控制器 5-Bit Dual Ph Contlr RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| E-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 |
| E-L6920DTR | 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 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。