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參數(shù)資料
| 型號： | SI9140DQ |
| 廠商： | Vishay Intertechnology,Inc. |
| 英文描述： | SMP Controller For High Performance Process Power Supplies |
| 中文描述： | SMP的高性能控制器過程電源 |
| 文件頁數(shù)： | 13/15頁 |
| 文件大?。?/td> | 470K |
| 代理商： | SI9140DQ |
Si9140
Vishay Siliconix
FaxBack 408-970-5600, request 70026
www.siliconix.com
S-58034—Rev. G, 15-Mar-99
13
The transition from stop clock and auto halt to active mode is
a perfect example. The microprocessor current can vary from
0.5 A to 10 A or greater during these transitions. If the
converter were to operate in discontinuous current mode
during the stop clock and auto halt modes, the transfer
function of the converter would be different compared to
operation in the active mode. In discontinuous current mode,
the converter bandwidth can be 10 to 15 times lower than the
continuous current mode (Figure 8). Therefore, the response
time will also be 10 to 15 times slower, violating the
microprocessor’s regulator requirements. This could result in
unreliable operation of the microprocessor.
FIGURE 7.
today’s microprocessors power supply design. Pulse-
skipping modes are undesirable in high-performance
microprocessor power supplies, especially when the minimum
load current is as high as 500 mA. This pulse-skipping mode
disables the synchronous rectification during light load and
generates a random noise spectrum which may produce EMI
problems.
Siliconix’ TrenchFET technology has resulted in 20-m
n-channel (Si4410DY) and 35-m
p-channel (Si4435DY)
MOSFETs in the SO-8 surface-mount package. These
LITTLE FOOT products totally eliminate the need for an
external heatsink.
FIGURE 8.
Non-Synchronous Converter BW
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| SI9140DQ-T1 | 功能描述:電壓模式 PWM 控制器 Switching Power Supply Controller RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓撲結構:Buck 輸出電壓:34 V 輸出電流: 開關頻率: 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 |
| SI9140DQ-T1-E3 | 功能描述:電壓模式 PWM 控制器 SMP CONTROLLER RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓撲結構:Buck 輸出電壓:34 V 輸出電流: 開關頻率: 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 |
| SI9140DY | 功能描述:電壓模式 PWM 控制器 SMP Controller RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓撲結構:Buck 輸出電壓:34 V 輸出電流: 開關頻率: 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 |
| SI9140DY-E3 | 功能描述:電壓模式 PWM 控制器 Switching Power Supply Controller RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓撲結構:Buck 輸出電壓:34 V 輸出電流: 開關頻率: 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 |
| SI9140DY-T1 | 功能描述:電壓模式 PWM 控制器 Switching Power Supply Controller RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓撲結構:Buck 輸出電壓:34 V 輸出電流: 開關頻率: 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 |
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