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LTC3805HMSE PDF预览

LTC3805HMSE

更新时间： 2024-01-19 08:41:40
品牌 Logo 应用领域
凌特 - Linear 光电控制器
页数 文件大小 规格书
42页 498K
描述
IC SWITCHING CONTROLLER, 700 kHz SWITCHING FREQ-MAX, PDSO10, PLASTIC, MSOP-10, Switching Regulator or Controller

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中文翻译

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LTC3805HMSE 技术参数

是否无铅： 含铅是否Rohs认证： 符合
生命周期：Active包装说明：HTSSOP,
针数：10Reach Compliance Code：compliant
风险等级：5.12模拟集成电路 - 其他类型：SWITCHING REGULATOR
控制模式：CURRENT-MODE控制技术：PULSE WIDTH MODULATION
最大输入电压：8.9 V最小输入电压：4.15 V
标称输入电压：8 VJESD-30 代码：S-PDSO-G10
JESD-609代码：e3长度：3 mm
功能数量：1端子数量：10
封装主体材料：PLASTIC/EPOXY封装代码：HTSSOP
封装形状：SQUARE封装形式：SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：NOT SPECIFIED认证状态：Not Qualified
座面最大高度：1.1 mm表面贴装：YES
切换器配置：BOOST最大切换频率：700 kHz
技术：CMOS端子面层：Matte Tin (Sn)
端子形式：GULL WING端子节距：0.5 mm
端子位置：DUAL处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：3 mmBase Number Matches：1

LTC3805HMSE 数据手册

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LTC4278  
IEEE 802.3at PD with  
Synchronous No-Opto Flyback  
Controller and 12V Aux Support  
DESCRIPTION  
FEATURES  
The LTC®4278 is an integrated Powered Device (PD) con-  
troller and switching regulator intended for high power  
n
25.5W IEEE 802.3at Compliant (Type 2) PD  
10V to 57V Auxiliary Power Input  
n
n
Shutdown Pin for Flexible Auxiliary Power Support  
Integrated State-of-the-Art No-Opto Synchronous  
Flyback Controller  
IEEE 802.3at and 802.3af applications. With a wide input  
voltagerange,theLTC4278isspecificallydesignedtosup-  
port PD applications that include a low-voltage auxiliary  
power input such as a 12V wall adaptor. The inclusion of  
a shutdown pin provides simple implementation of both  
PoE and auxiliary dominate applications. In addition, the  
LTC4278supportsboth1-eventand2-eventclassifications  
as defined by the IEEE, thereby allowing the use in a wide  
range of product configurations.  
n
– Isolated Power Supply Efficiency >92%  
– 88% Efficiency Including Diode Bridge and  
Hot Swap™ FET  
n
n
n
n
Superior EMI Performance  
Robust 100V 0.7Ω (Typ) Integrated Hot Swap MOSFET  
IEEE 802.3at High Power Available Indicator  
Integrated Signature Resistor and Programmable  
Class Current  
Undervoltage, Overvoltage and Thermal Protection  
Short-Circuit Protection with Auto-Restart  
Programmable Soft-Start and Switching Frequency  
Complementary Power Good Indicators  
Thermally Enhanced 7mm × 4mm DFN Package  
TheLTC4278synchronous,currentmode,flybackcontrol-  
ler generates multiple supply rails in a single conversion  
stepprovidingforthehighestsystemefficiencywhilemain-  
taining tight regulation across all outputs. The LTC4278  
includes Linear Technology’s patented No-Opto feedback  
topology to provide full IEEE 802.3 isolation without the  
need of an opto-isolator circuit. A true soft-start function  
allows graceful ramp-up of all output voltages.  
n
n
n
n
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APPLICATIONS  
The LTC4278 is available in a space saving 32-lead DFN  
package.  
L, LT, LTC, LTM, Linear Technology, SwitcherCAD and the Linear logo are registered  
trademarks and Hot Swap and ThinSOT are trademarks of Linear Technology Corporation.  
All other trademarks are the property of their respective owners. Protected by U.S. Patents,  
including 5841643.  
n
VoIP Phones with Advanced Display Options  
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Dual-Radio Wireless Access Points  
n
PTZ Security Cameras  
RFID Readers  
Industrial Controls  
n
n
EPC3472G-LF  
TYPICAL APPLICATION  
25W PD Solution with 12V Auxiliary  
•
0.18µH  
47µF  
5V  
8.2µH  
4.5A  
+
+
•
+
100µF  
AUXILIARY  
•
10µF  
10µF  
SUPPLY  
(10V TO 57V)  
294k  
21.5k  
3.01k  
BSS63  
–
1µF  
TO MICRO  
CONTROLLER  
HAT2169  
46.4k  
FDMS2572  
12mΩ  
~ +  
~ –  
54V FROM  
DATA PAIR  
PDS5100H  
0.1µF  
+
–
FB  
V
PG SENSE  
UVLO PWRGD T2P  
PORTP  
SHDN  
CC  
V
SENSE  
R
CLASS  
LTC4278  
24k  
30.9Ω  
~ +  
~ –  
SG  
CMP  
54V FROM  
SPARE PAIR  
2.2nF  
V
V
1µF  
PORTN  
NEG  
V
SYNC GND OSC PGDLY  
12k  
t
ENDLY  
100k  
R
C
ON  
CMP  
CMP  
•
•
38.3k 1.8k  
B1100  
33pF  
0.1µF  
4278 TA01a  
4278fc  
1
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中文翻译

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