- 您现在的位置：买卖IC网 > PDF目录80080 > LT3574EMS#TRPBF (LINEAR TECHNOLOGY CORP) 1.1 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO16 PDF资料下载
参数资料
| 型号： | LT3574EMS#TRPBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 1.1 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封装： | LEAD FREE, PLASTIC, MSOP-16 |
| 文件页数： | 9/24页 |
| 文件大小： | 285K |
| 代理商： | LT3574EMS#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.
相关PDF资料 |
PDF描述 |
|---|---|
| LTC6992IS6-4#PBF | SWITCHING CONTROLLER, PDSO6 |
| LTC694-3.3CN8 | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDIP8 |
| LM1575K-15/883 | 1.3 A SWITCHING REGULATOR, 52 kHz SWITCHING FREQ-MAX, MBFM2 |
| LX1570IM | 1 A SWITCHING CONTROLLER, 100 kHz SWITCHING FREQ-MAX, PDIP8 |
| LK4601-7ERD2TB1 | 1-OUTPUT 150 W AC-DC PWR FACTOR CORR MODULE |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3574IMS | 制造商:LINER 制造商全称:Linear Technology 功能描述:Isolated Flyback Converter Without an Opto-Coupler |
| LT3574IMS#PBF | 功能描述:IC REG FLYBK ISO ADJ .65A 16MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
| LT3574IMS#TRPBF | 功能描述:IC REG FLYBK ISO ADJ .65A 16MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
| LT3574IMSPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Isolated Flyback Converter Without an Opto-Coupler |
| LT3574IMSTRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Isolated Flyback Converter Without an Opto-Coupler |
发布紧急采购，3分钟左右您将得到回复。