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參數(shù)資料
| 型號： | SI9121DB-5 |
| 廠商： | Vishay Intertechnology,Inc. |
| 英文描述： | High-Voltage, Non-Isolated Buck-Boost Converter for ISDN Digital Phones |
| 中文描述： | 高電壓，非隔離的Buck - Boost對ISDN數(shù)字電話交換器 |
| 文件頁數(shù)： | 1/9頁 |
| 文件大?。?/td> | 109K |
| 代理商： | SI9121DB-5 |
Si9121
Vishay Siliconix
Document Number: 71112
S-40708—Rev. C, 19-Apr-04
www.vishay.com
1
High-Voltage, Non-Isolated Buck-Boost Converter
for ISDN Digital Phones
FEATURES
Fixed +5-V or +3.3-V Output
Integrated Floating Feedback Amplifier
On-Chip 70-V, 1.5- N-Channel
MOSFET Switch
Integrated High Voltage Start-Up Circuit,
with V
CC
Regulator
10-V to
60-V Input Voltage Range
95-kHz PWM Operation
Integrated Soft-Start and Oscillator
High Efficiency Over Full Load Range
Under Voltage Lockout
Current Mode Control
Hiccup Mode Short Circuit
Protection
Thermal Shutdown
SOIC-8 Narrow-Body Package
DESCRIPTION
The Si9121 simplifies the
48-V to +5-V or +3.3-V converter
design for ISDN application by integrating the floating
feedback error amplifier providing direct output voltage
regulation. This approach eliminates the need for an external
shunt regulator. The Si9121 also integrates a high voltage
depletion mode MOSFET which allows the converter to be
powered directly from the high input bus voltage without
requiring an external start-up circuit. Combined with simple
magnetic design due to its non-isolated topology, the Si9121
provides a one-chip solution for complete ISDN power supply.
In order to reduce external component count, the Si9121 has
a fully integrated 95-kHz oscillator and soft-start circuit.
The Si9121 is available in both standard and lead (Pb)-free
SOIC-8 pin packages, and is offered in either +5-V or +3.3-V
fixed
output
options
(Si9121DY-5
respectively). In order to satisfy the stringent ambient
temperature requirements in many applications, the Si9121 is
rated to the industrial temperature range of
40 C to 85 C.
or
Si9121DY-3,
FUNCTIONAL BLOCK DIAGRAM
V
48 V
V
+5 V/400 mA
or
+3.3 V/400 mA
V
CC
Regulator
Reference Generator
Control
V
CC
L
X
BYPASS
COMP
V
NEG
C
S
V
OUT
GND
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SI9121DY-3 | High-Voltage, Non-Isolated Buck-Boost Converter for ISDN Digital Phones |
| SI9121DY-3-T1 | High-Voltage, Non-Isolated Buck-Boost Converter for ISDN Digital Phones |
| SI9121DY-3-T1-E3 | High-Voltage, Non-Isolated Buck-Boost Converter for ISDN Digital Phones |
| SI9121DY-5 | High-Voltage, Non-Isolated Buck-Boost Converter for ISDN Digital Phones |
| SI9121DY-5-T1 | High-Voltage, Non-Isolated Buck-Boost Converter for ISDN Digital Phones |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SI9121DY-3 | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 HV 3.3V 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 |
| SI9121DY-3-E3 | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 Hi-V Buck/Boost 3V Converter 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 |
| SI9121DY-3-T1 | 制造商:VISHAY 制造商全稱:Vishay Siliconix 功能描述:High-Voltage, Non-Isolated Buck-Boost Converter for ISDN Digital Phones |
| SI9121DY-3-T1-E3 | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 Hi-V Buck/Boost 3V Converter 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 |
| SI9121DY-5 | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 HV 5V 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 |
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