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LT3837EFE-PBF PDF预览

LT3837EFE-PBF

更新时间: 2024-01-06 05:37:02
品牌 Logo 应用领域
凌特 - Linear 光电控制器
页数 文件大小 规格书
28页 251K
描述
Isolated No-Opto Synchronous Flyback Controller

LT3837EFE-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:5.2模拟集成电路 - 其他类型:SWITCHING CONTROLLER
控制模式:CURRENT-MODE最大输入电压:20 V
最小输入电压:4.5 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:-40 °C
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:110 kHz
技术:BIPOLAR温度等级:AUTOMOTIVE
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 mm
Base Number Matches:1

LT3837EFE-PBF 数据手册

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LT3837  
Isolated No-Opto  
Synchronous Flyback Controller  
FEATURES  
DESCRIPTION  
The LT®3837 is an isolated switching regulator controller  
designed for medium power flyback topologies. A typical  
application is 10W to 60W with the part powered from a  
DC supply.  
n
Senses Output Voltage Directly from Primary Side  
Winding—No Optoisolator Required  
Synchronous Driver for High Efficiency  
Supply Voltage Range 4.5V to 20V  
Accurate Regulation Without User Trims  
Programmable Switching Frequency from  
50kHz to 250kHz  
n
n
n
n
The LT3837 is a current mode controller that regulates an  
output voltage based on sensing the 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.  
n
n
n
n
Synchronizable  
Load Compensation  
Undervoltage Lockout  
Available in a Thermally Enhanced 16-Lead  
TSSOP Package  
The LT3837 operates in forced continuous conduction  
modewhichimprovescrossregulationinmultiplewinding  
applications. Switching frequency is user programmable  
and can be externally synchronized. The part also has load  
compensation, undervoltage lockout and soft-start circuitry.  
APPLICATIONS  
n
Isolated Medium Power (10W to 60W) Supplies  
n
Instrumentation Power Supplies  
n
Isolated Medical Supplies  
The LT3837 is available in a thermally enhanced 16-pin  
TSSOP package.  
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.  
All other trademarks are the property of their respective owners.  
Protected by U.S. Patents including 6498466, 5841643.  
Efficiency vs Load Current  
TYPICAL APPLICATION  
90  
18V  
9V  
IN  
IN  
88  
9V –18V to 3.3V at 10A Isolated Converter  
86  
84  
82  
80  
V
IN  
22.1k  
10μF  
BAS16  
22μF  
100nH  
OUTPUT 3.3V/10A  
220μF  
2N3906  
47μF s 3  
2.2nF  
10Ω  
86.6k  
15k  
78  
76  
V
CC  
FB  
UVLO  
2
5
7
8
9
10  
3
4
6
B0540W  
V
C
3837 TA01b  
LOAD CURRENT (A)  
3k  
1nF  
10Ω  
LT3837  
47pF  
20k  
Regulation vs Load Current  
OSC  
SFST  
FMMT618  
1μF  
3.60  
3.50  
3.40  
3.30  
3.20  
3.10  
3.00  
Si7336ADP  
3.3nF  
Si7852DP  
PG  
+
100k  
12k  
FMMT718  
t
ON  
150k  
SENSE  
ENDLY  
PGDLY  
8mΩ  
0.1μF  
9V  
IN  
1.37k  
SENSE  
R
CMP  
2.2nF  
330Ω  
15Ω  
0.1μF  
18V  
IN  
SG  
C
CMP  
GND  
10k  
BAT54  
3837 TA01  
2
5
7
8
9
10  
3
4
6
3837 TA01c  
LOAD CURRENT (A)  
3837fa  
1

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