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LT3825EFE-PBF PDF预览

LT3825EFE-PBF

更新时间： 2024-01-10 16:45:37
品牌 Logo 应用领域
凌特 - Linear 光电控制器
页数 文件大小 规格书
32页 340K
描述
Isolated No-Opto Synchronous Flyback Controller with Wide Input Supply Range

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中文翻译

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LT3825EFE-PBF 技术参数

是否Rohs认证： 符合生命周期：Transferred
零件包装代码：TSSOP包装说明：HTSSOP, TSSOP16,.25
针数：16Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.16模拟集成电路 - 其他类型：SWITCHING CONTROLLER
控制模式：CURRENT-MODE最大输入电压：18 V
最小输入电压：11 V标称输入电压：14 V
JESD-30 代码：R-PDSO-G16JESD-609代码：e3
长度：5 mm湿度敏感等级：1
功能数量：1端子数量：16
最高工作温度：125 °C最低工作温度：
封装主体材料：PLASTIC/EPOXY封装代码：HTSSOP
封装等效代码：TSSOP16,.25封装形状：RECTANGULAR
封装形式：SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH峰值回流温度（摄氏度）：260
认证状态：Not Qualified座面最大高度：1.1 mm
子类别：Switching Regulator or Controllers表面贴装：YES
切换器配置：SINGLE最大切换频率：250 kHz
温度等级：OTHER端子面层：Matte Tin (Sn)
端子形式：GULL WING端子节距：0.65 mm
端子位置：DUAL处于峰值回流温度下的最长时间：30
宽度：4.4 mmBase Number Matches：1

LT3825EFE-PBF 数据手册

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LT3825  
Isolated No-Opto  
Synchronous Flyback Controller  
with Wide Input Supply Range  
DESCRIPTION  
FEATURES  
The LT®3825 is an isolated switching regulator controller  
n
Senses Output Voltage Directly from Primary Side  
Winding—No Optoisolator Required  
Synchronous Driver for High Efficiency  
Input Voltage Limited Only by External  
Power Components  
designed for medium power flyback topologies. A typical  
application is 10W to 60W with input voltage limited only  
by external power path components. A third transformer  
winding provides output voltage feedback.  
n
n
n
n
n
n
n
n
Accurate Output Regulation Without User Trims  
Switching Frequency from 50kHz to 250kHz  
Synchronizable  
The LT3825 is a current mode controller that regulates  
output voltage based on sensing secondary voltage via  
a transformer winding during flyback. This allows for  
tight output regulation without the use of an optoisolator,  
improving dynamic response and reliability. Synchronous  
rectification increases converter efficiency and improves  
output cross regulation in multiple output converters.  
Load Compensation  
Programmable Undervoltage Lockout  
Available in a Thermally Enhanced 16-Lead  
TSSOP Package  
TheLT3825operatesinforcedcontinuousconductionmode  
which improves cross regulation in multiple winding ap-  
plications.Switchingfrequencyisuserprogrammableand  
canbeexternallysynchronized.Thepartalsohasloadcom-  
pensation, undervoltage lockout and soft-start circuity.  
APPLICATIONS  
n
Isolated Medium Power (10W to 60W) Supplies  
n
Isolated Telecom, Medical Converters  
n
Instrumentation Power Supplies  
n
Isolated Power over Ethernet Supplies  
L, LTC and LT are registered trademarks of Linear Technology Corporation.  
All other trademarks are the property of their respective owners.  
Protected by U.S. Patents, including 6948466, 5841643.  
Efficiency  
92  
TYPICAL APPLICATION  
90  
36V  
IN  
48V  
IN  
88  
72V  
IN  
86  
84  
82  
80  
48V to 3.3V at 12V Isolated Supply  
+
V
3.3V  
12A  
+
OUT  
V
IN  
36V TO 72V  
470μF  
•
100pF  
20Ω  
×4  
T1  
28.7k  
3.01k  
•
T1  
20Ω  
47μF  
47k  
78  
•
47Ω  
2
5
7
8
9
10 11 12  
3
4
6
+
3825 TA01b  
LOAD CURRENT (A)  
SG  
SG  
402k  
15k  
Regulation  
×2  
+
–
FB  
V
PG  
3.43  
3.38  
3.33  
3.28  
3.23  
3.18  
3.13  
SENSE  
CC  
2.2μF  
SG  
1μF  
0.02Ω  
UVLO  
330Ω  
15Ω  
LT3825  
SENSE  
V
36V  
48V  
72V  
IN  
IN  
IN  
2.2nF  
PGDLY  
0.1μF  
C
t
SYNC  
R
CMP  
ENDLY  
OSC GND SFST  
C
CMP  
ON  
10nF  
100k  
•
•
0.22μF  
0.1μF  
10k  
12k 100k  
2.1k 150k  
47pF  
3825 TA01a  
2
5
7
8
9
10 11 12  
3
4
6
3825 TA01c  
LOAD CURRENT (A)  
3825fa  
1
1234567...32

中文翻译

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