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參數(shù)資料
| 型號： | LT3574IMS#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1.1 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | LEAD FREE, PLASTIC, MSOP-16 |
| 文件頁數(shù)： | 9/24頁 |
| 文件大?。?/td> | 285K |
| 代理商： | LT3574IMS#TRPBF |
LT3574
3574f
applications inForMation
Figure 9. RCD Snubber in a Flyback Converter
Figure 10. Typical Switch Node Waveform
3574 F09
LS
D
R
C
VIN
VC
NVOUT
tSP
3574 F10
During switch turn-off, the energy stored in the leakage
inductance is transferred to the snubber capacitor, and
eventually dissipated in the snubber resistor.
1
2
L I
f
V V
N V
R
S PK SW
C
OUT
=
(
)
The snubber resistor affects the spike amplitude VC and
duration tSP, the snubber resistor is adjusted such that
tSP is about 150ns. Prolonged tSP may cause distortion
to the output voltage sensing.
The previous steps finish the flyback power stage
design.
5. Select the feedback resistor for proper output
voltage.
Using the resistor Tables 1-4, select the feedback resis-
tor RFB, and program the output voltage to 5V. Adjust the
RTC resistor for temperature compensation of the output
voltage. RREF is selected as 6.04k.
A small capacitor in parallel with RREF filters out the noise
during the voltage spike, however, the capacitor should
limit to 10pF. A large capacitor causes distortion on volt-
age sensing.
6. Optimize the compensation network to improve the
transient performance.
The transient performance is optimized by adjusting the
compensationnetwork.Forbestrippleperformance,select
a compensation capacitor not less than 1nF, and select a
compensation resistor not greater than 50k.
7. Current limit resistor, soft-start capacitor and UVLO
resistor divider
Use the current limit resistor RLIM to lower the current
limitifacompacttransformerdesignisrequired.Soft-start
capacitorhelpsduringthestart-upoftheflybackconverter.
Select the UVLO resistor divider for intended input opera-
tion range. These equations are aforementioned.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT3575 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Monolithic High Voltage Isolated Flyback Converter No External Start-Up Resistor |
| LT3575EFE#PBF | 功能描述:IC REG FLYBACK ISO ADJ 16TSSOP 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(biāo)準(zhǔn)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(yīng)商設(shè)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 |
| LT3575EFE#TRPBF | 功能描述:IC REG FLYBACK ISO ADJ 16TSSOP 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:- 設(shè)計資源:Design Support Tool 標(biāo)準(zhǔn)包裝:1 系列:- 類型:升壓（升壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:100mA 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:SOT-23-5 細型，TSOT-23-5 包裝:剪切帶 (CT) 供應(yīng)商設(shè)備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT |
| LT3575EFEPBF | 制造商:Linear Technology 功能描述:DC-DC Converter Step-Up/Down 40V TSSOP16 |
| LT3575IFE#PBF | 功能描述:IC REG FLYBACK ISO ADJ 16TSSOP 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(biāo)準(zhǔn)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(yīng)商設(shè)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 |
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