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參數(shù)資料
| 型號： | PT5548A |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1 A SWITCHING REGULATOR, 400 kHz SWITCHING FREQ-MAX, SMA3 |
| 文件頁數(shù)： | 6/8頁 |
| 文件大?。?/td> | 195K |
| 代理商： | PT5548A |
For technical support and more information, see inside back cover or visit www.ti.com
Application Notes continued
Fault Protection
Unlike a “Buck” or step-down regulator it is not possible
to provide a boost regulator with short-circuit protection.
As revealed in the block diagram of Figure 1-1, inhibiting
the MOSFET switching action only disables the regulator’s
boost function. Therefore under a severe output impedance
fault the control circuit cannot disconnect the output from
the input source.
To prevent an output over-current or short-circuit fault
from propagating to the input bus, a fuse or equivalent
over-current protection is recommended at the input of
the module. Whatever form of protection is selected, it is
important to note that the impedance and/or voltage drop
of the series element will add to the regulator’s minimum
input voltage requirements. Power up may also be affected.
The combination of an input surge current with an im-
pedance in series with the regulator input may cause the
input voltage to momentarily dip back below the UVLO
threshold. Ensure that the fuse rating or input current
limit threshold are designed with a generous margin.
PT5540 Series
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| PT5548C | 功能描述:REG 12.6V 1A 4.5/9VIN SMD RoHS:否 類別:電源 - 板載 >> DC DC Converters 系列:PT5540 設計資源:Maxi/Mini/Micro Design Guide, Appl Manual 標準包裝:1 系列:Maxi 類型:隔離 輸出數(shù):1 電壓 - 輸入（最?。?43V 電壓 - 輸入（最大）:110V Voltage - Output 1:15V Voltage - Output 2:- Voltage - Output 3:- 電流 - 輸出（最大）:* 電源（瓦） - 制造商系列:400W 電壓 - 隔離:* 特點:* 安裝類型:通孔 封裝/外殼:模塊 尺寸/尺寸:4.60" L x 2.20" W x 0.54" H（116.8mm x 55.9mm x 13.7mm） 包裝:散裝 工作溫度:-55°C ~ 100°C 效率:* 電源（瓦特）- 最大:* |
| PT5548N | 功能描述:REG 12.6V 1A 4.5/9VIN VERT RoHS:否 類別:電源 - 板載 >> DC DC Converters 系列:PT5540 設計資源:Maxi/Mini/Micro Design Guide, Appl Manual 標準包裝:1 系列:Maxi 類型:隔離 輸出數(shù):1 電壓 - 輸入（最小）:43V 電壓 - 輸入（最大）:110V Voltage - Output 1:15V Voltage - Output 2:- Voltage - Output 3:- 電流 - 輸出（最大）:* 電源（瓦） - 制造商系列:400W 電壓 - 隔離:* 特點:* 安裝類型:通孔 封裝/外殼:模塊 尺寸/尺寸:4.60" L x 2.20" W x 0.54" H（116.8mm x 55.9mm x 13.7mm） 包裝:散裝 工作溫度:-55°C ~ 100°C 效率:* 電源（瓦特）- 最大:* |
| PT55928B | 制造商:EVERLIGHT 制造商全稱:Everlight Electronics Co., Ltd 功能描述:Phototransistor |
| PT55928BL2 | 制造商:EVERLIGHT 制造商全稱:Everlight Electronics Co., Ltd 功能描述:Phototransistor |
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