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參數(shù)資料
| 型號： | ISL6444 |
| 廠商： | Intersil Corporation |
| 英文描述： | Dual PWM Controller with DDR Memory Option for Gateway Applications(帶DDR存儲器選項的網(wǎng)關(guān)專用雙PWM控制器) |
| 中文描述： | 雙PWM控制器的DDR網(wǎng)關(guān)應(yīng)用（帶的DDR存儲器選項的網(wǎng)關(guān)專用雙脈寬調(diào)制控制器內(nèi)存選項） |
| 文件頁數(shù)： | 13/19頁 |
| 文件大?。?/td> | 372K |
| 代理商： | ISL6444 |
13
FN9069.3
April 12, 2007
In the case when power for VDDQ is taken from the +5V
system rail, as Figure 8 shows, both in-phase and out-of-
phase approaches are susceptible to noise in the sourcing
mode.
Noise immunity can be improved by operating the VTT
converter with a 90° phase shift. As the time diagrams in
Figure 8 show, the points of concern are always about a
quarter of the period away from the noise emitting
transitions.
Several ways of synchronization are implemented into the
chip. When the DDR pin is connected to GND, the channels
operate 180° out-of-phase. In the DDR mode when the DDR
pin is connected to VCC, the channels operate either
in-phase when the VIN pin is connected to the input voltage
source, or with 90° phase shift if the VIN pin is connected to
GND via the 100k
Ω
resistor.
FIGURE 7. CHANNEL INTRFEARENCE VIN = 7.5V...24V
OUT-OF-PHASE
IN-PHASE
SOURCING
SINKING
SINKING
SOURCING
VTT
VTT
300kHz CLOCK
VDDQ
FIGURE 8. CHANNEL INTERFERENCE VIN = 5V
OUT-OF-PHASE
IN-PHASE
SOURCING
SINKING
SINKING
SOURCING
300kHz CLOCK
VTT
VTT
VDDQ
90
o
PHASE SHIFT
SINKING
SOURCING
VTT
ISL6444
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| ISL6444CA | 功能描述:電流型 PWM 控制器 Dual with DDR Memory 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 |
| ISL6444CA-T | 功能描述:IC CONTROLLER DDR 28-QSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,000 系列:- 應(yīng)用:電源，ICERA E400，E450 輸入電壓:4.1 V ~ 5.5 V 輸出數(shù):10 輸出電壓:可編程 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:42-WFBGA，WLCSP 供應(yīng)商設(shè)備封裝:42-WLP 包裝:帶卷 (TR) |
| ISL6444CAZ | 功能描述:IC CONTROLLER DDR 28-QSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標準包裝:43 系列:- 應(yīng)用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數(shù):1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-QFN（7x7） 包裝:管件 |
| ISL6444CAZT | 制造商:Intersil Corporation 功能描述: |
| ISL6444CAZ-T | 功能描述:IC CONTROLLER DDR 28-QSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標準包裝:43 系列:- 應(yīng)用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數(shù):1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-QFN（7x7） 包裝:管件 |
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