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LX1554IDM-TR

更新时间： 2024-11-23 21:04:15
品牌 Logo 应用领域
美高森美 - MICROSEMI 开关光电二极管
页数 文件大小 规格书
18页 483K
描述
Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, PDSO8, ROHS COMPLIANT, PLASTIC, SOIC-8

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LX1554IDM-TR 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Obsolete零件包装代码：SOIC
包装说明：SOP, SOP8,.25针数：8
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.72
模拟集成电路 - 其他类型：SWITCHING CONTROLLER控制模式：CURRENT-MODE
控制技术：PULSE WIDTH MODULATION最大输入电压：25 V
最小输入电压：12 V标称输入电压：15 V
JESD-30 代码：R-PDSO-G8JESD-609代码：e3
长度：4.915 mm功能数量：1
端子数量：8最高工作温度：85 °C
最低工作温度：-40 °C最大输出电流：1 A
封装主体材料：PLASTIC/EPOXY封装代码：SOP
封装等效代码：SOP8,.25封装形状：RECTANGULAR
封装形式：SMALL OUTLINE峰值回流温度（摄氏度）：NOT SPECIFIED
认证状态：Not Qualified座面最大高度：2 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：500 kHz
温度等级：INDUSTRIAL端子形式：GULL WING
端子节距：1.27 mm端子位置：DUAL
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：3.875 mm
Base Number Matches：1

LX1554IDM-TR 数据手册

 浏览型号LX1554IDM-TR的Datasheet PDF文件第2页浏览型号LX1554IDM-TR的Datasheet PDF文件第3页浏览型号LX1554IDM-TR的Datasheet PDF文件第4页浏览型号LX1554IDM-TR的Datasheet PDF文件第5页浏览型号LX1554IDM-TR的Datasheet PDF文件第6页浏览型号LX1554IDM-TR的Datasheet PDF文件第7页 
LX1552/3/4/5  
URRENT, C URRENT- MODE PWM  
U
LTRA- LOW  
S
TART- U  
P
C
P
R O D U C T I O N D A T A S H E E T  
T
H E  
I
N F I N I T E  
P
O W E R O F  
I N N O V A T I O N  
KEY FEATURES  
DESCRIPTION  
The LX155x family of ultra-low start-up current  
(250µA max), current mode control ICs offer new  
levels of energy efficiency for offline converter  
Additionally, the precise oscillator discharge  
current gives the power supply designer  
considerable flexibility in optimizing system duty  
cycle consistency.  
„
Ultra-Low Start-up Current (150µA  
Typical)  
Trimmed Oscillator Discharge  
Current (±2% Typical)  
Initial Oscillator Frequency Better  
Than ±4%  
Output Pulldown During UVLO  
Precision 2.5V Reference (±2  
maximum)  
Current Sense Delay to Output  
(150ns Typical)  
Automatic Feed Forward  
Compensation  
Pulse-by-Pulse Current Limiting  
Enhanced Load response  
Characteristics  
Under-Voltage Lockout with  
Hysteresis  
Double Pulse Suppression  
„
„
applications.  
They are ideally optimized for  
personal computer and CRT power supplies  
although they can be used in any number of off-line  
applications where energy efficiency is critical.  
Coupled with the fact that the LX155x series  
requires a minimal set of external components, the  
series offers an excellent value for cost conscious  
consumer applications.  
The current mode architecture demonstrates  
improved load regulation, pulse by pulse current  
limiting and inherent protection of the power  
supply output switch. The LX155x includes a  
bandgap reference trimmed to 1%, an error  
amplifier, a current sense comparator internally  
clamped to 1V, a high current totem pole output  
stage for fast switching of power MOSFETs, and  
an externally programmable oscillator to set  
operating frequency and maximum duty cycle.  
The under voltage lock-out circuitry is designed to  
operate with as little as 250µA of supply current  
permitting very efficient bootstrap designs.  
„
„
„
„
Optimizing energy efficiency, the LX155x series  
demonstrates  
a significant power reduction as  
„
„
compared with other similar off-line controllers.  
Table 1 compares the SG384x, UC384xA and the  
LX155x start-up resistor power dissipation. The  
LX155x offers an overall 4X reduction in power  
dissipation.  
„
„
„
High Current Totem Pole Output  
(±1A Peak)  
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com  
„
500KHz Operation  
PRODUCT HIGHLIGHT  
APPLICATIONS  
Typical Application of LX155x Using Its MicroPower Start-Up Feature  
„
Economy Off-Line Flyback or  
Forward Converters  
DC-DC Buck or Boost Converters  
Low Cost DC Motor Control  
Design Using  
Max. Start-up Current  
SG384x UC384xA LX155x  
R
ST  
1000µA  
62KΩ  
500µA  
124KΩ  
1.13W  
250µA  
248KΩ  
0.56W  
„
„
Specification (IST  
Typical Start-up Resistor  
Value (RST  
)
)
I
ST  
AC  
Max. Start-up Resistor  
Power Dissipation (PR)  
INPUT  
2.26W  
V
CC  
Available Options Per part#  
Part #  
Start-Up  
Voltage  
16V  
8.4V  
16V  
Max. Duty  
Hysteresis  
Note: Calculation is done for universal AC input  
specification of VACMIN = 90VRMS to VACMAX = 256VRMS using  
the following equation: (resistor current is selected to be 2  
LX1552  
or  
Cycle  
<100%  
<100%  
<50%  
LX1552  
LX1553  
LX1554  
LX1555  
6V  
0.8V  
6V  
LX1554  
* IST @ VACMIN  
)
2VAC  
8.4V  
0.8V  
<50%  
VACMIN  
2 • IST  
2
MAX  
RST  
=
,P =  
R
RST  
PACKAGE ORDER INFO  
Ceramic DIP  
8-Pin  
Plastic TSSOP  
20-Pin  
RoHS Compliant / Pb-free  
Transition DC: 0442  
Plastic DIP  
8-Pin  
RoHS Compliant / Pb-free  
Transition DC: 0503  
Plastic SOIC  
8-Pin  
Plastic SOIC  
14-Pin  
M
DM  
D
Y
PW  
TA (°C)  
RoHS Compliant / Pb-free  
Transition DC: 0440  
RoHS Compliant / Pb-free  
Transition DC: 0440  
0 to 70  
-40 to 85  
-55 to 125  
LX155xCM  
LX155xIM  
-
LX155xCDM  
LX155xIDM  
-
LX155xCD  
LX155xID  
-
-
-
LX155xCPW  
-
-
LX155xMY  
Note: Available in Tape & Reel. Append the letters “TR” to the part number (i.e. LX1552CDM-TR).  
L
I N  
F
I N I T Y  
M
I C R O E L E C T R O N I C S  
I
N C .  
Copyright © 1994  
Rev. 1.0b,2005-03-01  
1
11861 WESTERN  
A
VENUE, GARDEN GROVE, CA. 92841, 714-898-8121, FAX: 714-893-2570  
1234567...18

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