- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄377702 > LT1425CS (LINEAR TECHNOLOGY CORP) Isolated Flyback Switching Regulator with 9V Output PDF資料下載
參數(shù)資料
| 型號： | LT1425CS |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Isolated Flyback Switching Regulator with 9V Output |
| 中文描述： | 1.9 A SWITCHING REGULATOR, 320 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | 0.150 INCH, PLASTIC, SOP-16 |
| 文件頁數(shù)： | 7/20頁 |
| 文件大?。?/td> | 341K |
| 代理商： | LT1425CS |
7
LT1425
TW
U
W
V
VOLTAGE
V
IN
GND
OFF
ON
MINIMUM t
ON
ENABLE DELAY
MINIMUM ENABLE TIME
1425 TD
OFF
ON
SWITCH
STATE
FLYBACK AMP
STATE
0.80
×
V
FLBK
V
FLBK
COLLAPSE
DETECT
ENABLED
DISABLED
DISABLED
OPERATIO
The LT1425 is a current mode switching regulator IC that
has been designed specifically for the isolated flyback
topology. The special problem normally encountered in
such circuits is that information relating to the output
voltage on the isolated secondary side of the transformer
must be communicated to the primary side in order to
maintain regulation. Historically, this has been done with
optoisolators or extra transformer windings. Optoisolator
circuits waste output power and the extra components
they require increase the cost and physical volume of the
power supply. Optoisolators can also exhibit trouble due
to limited dynamic response (temporal), nonlinearity,
unit-to-unit variation and aging over life. Circuits
employing extra transformer windings also exhibit defi-
ciencies. The extra winding adds to the transformer’s
physical size and cost. Dynamic response is often
mediocre. There is usually no method for maintaining
load regulation versus load.
U
The LT1425 derives its information about the isolated
output voltage by examining the primary side flyback
pulse waveform. In this manner no optoisolator nor extra
transformer winding is required. This IC is a quantum
improvement over previous approaches because: target
output voltage is directly resistor-programmable, regu-
lation is maintained well into discontinuous mode and
optional load compensation is available.
The Block Diagram shows an overall view of the system.
Many of the blocks are similar to those found in tradi-
tional designs including: internal bias regulator, oscilla-
tor, logic, current amplifier and comparator, driver and
output switch. The novel sections include a special
flyback error amplifier and a load compensation mecha-
nism. Also, due to the special dynamic requirements of
flyback control, the logic system contains additional
functionality not found in conventional designs.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LT1431C | Programmable Reference |
| LT1431IN8 | Programmable Reference |
| LT1431IS8 | Programmable Reference |
| LT1431MJ8 | Programmable Reference |
| LT1431CN8 | Programmable Reference |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT1425CS#PBF | 功能描述:IC REG FLYBK ISOLATED .2A 16SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標準包裝:250 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.2V 輸入電壓:2.05 V ~ 6 V PWM 型:電壓模式 頻率 - 開關(guān):2MHz 電流 - 輸出:500mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:6-UFDFN 包裝:帶卷 (TR) 供應商設備封裝:6-SON（1.45x1） 產(chǎn)品目錄頁面:1032 (CN2011-ZH PDF) 其它名稱:296-25628-2 |
| LT1425CS#TR | 功能描述:IC REG FLYBK ISOLATED .2A 16SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標準包裝:2,500 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.2V，1.5V，1.8V，2.5V 輸入電壓:2.7 V ~ 20 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:50mA 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬）裸露焊盤 包裝:帶卷 (TR) 供應商設備封裝:10-MSOP 裸露焊盤 |
| LT1425CS#TRPBF | 功能描述:IC REG FLYBK ISOLATED .2A 16SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標準包裝:2,500 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.2V，1.5V，1.8V，2.5V 輸入電壓:2.7 V ~ 20 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:50mA 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬）裸露焊盤 包裝:帶卷 (TR) 供應商設備封裝:10-MSOP 裸露焊盤 |
| LT1425CSPBF | 制造商:Linear Technology 功能描述:LT1425CSPBF |
| LT1425IS | 功能描述:IC REG FLYBK ISOLATED .2A 16SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標準包裝:2,500 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.2V，1.5V，1.8V，2.5V 輸入電壓:2.7 V ~ 20 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:50mA 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬）裸露焊盤 包裝:帶卷 (TR) 供應商設備封裝:10-MSOP 裸露焊盤 |
發(fā)布緊急采購，3分鐘左右您將得到回復。