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LX1553CDMT

更新时间： 2024-11-19 13:09:55
品牌 Logo 应用领域
美高森美 - MICROSEMI /
页数 文件大小 规格书
18页 376K
描述
Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, PDSO8, PLASTIC, SOIC-8

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LX1553CDMT 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：PLASTIC, SOIC-8针数：8
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.73
Is Samacsys：N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：30 V最小输入电压：12 V
标称输入电压：15 VJESD-30 代码：R-PDSO-G8
长度：4.9 mm湿度敏感等级：1
功能数量：1端子数量：8
最高工作温度：70 °C最低工作温度：
最大输出电流：1 A封装主体材料：PLASTIC/EPOXY
封装代码：SOP封装形状：RECTANGULAR
封装形式：SMALL OUTLINE峰值回流温度（摄氏度）：260
认证状态：Not Qualified座面最大高度：1.75 mm
表面贴装：YES切换器配置：SINGLE
最大切换频率：500 kHz温度等级：COMMERCIAL
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：40
宽度：3.9 mmBase Number Matches：1

LX1553CDMT 数据手册

 浏览型号LX1553CDMT的Datasheet PDF文件第2页浏览型号LX1553CDMT的Datasheet PDF文件第3页浏览型号LX1553CDMT的Datasheet PDF文件第4页浏览型号LX1553CDMT的Datasheet PDF文件第5页浏览型号LX1553CDMT的Datasheet PDF文件第6页浏览型号LX1553CDMT的Datasheet PDF文件第7页 
LIN DOC #: 1552  
LX1552/3/4/5  
U
LTRA-LOW  
S
TART-U  
P
C
URRENT, CURRENT-MODE PWM  
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  
P R O D U C T I O N D A T A S H E E T  
DESCRIPTION  
KEY FEATURES  
■ ULTRA-LOW START-UP CURRENT  
The LX155X family of ultra-low start-up  
current (250µA max.), current mode  
control IC's offer new levels of energy  
efficiency for offline converter applica-  
tions. 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  
tion. Additionally, the precise oscillator  
discharge current gives the power  
supply designer considerable flexibility  
in optimizing system duty cycle  
consistency.  
(150µA typ.)  
■ TRIMMED OSCILLATOR DISCHARGE  
CURRENT (±±2 typ.)  
■ INITIAL OSCILLATOR FREQUENCY BETTER  
THAN ±±4  
The current mode architecture  
■ OUTPUT PULLDOWN DURING UVLO  
■ PRECISION 2.5V REFERENCE (±±2 max.)  
p CURRENT SENSE DELAY TO OUTPUT  
(150ns typ.)  
p AUTOMATIC FEED FORWARD  
COMPENSATION  
p PULSE-BY-PULSE CURRENT LIMITING  
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 com-  
parator internally clamped to 1V, a high  
current totem pole output stage for fast  
switching of power mosfet's, and an  
externally programmable oscillator to  
set operating frequency and maximum  
duty cycle. The undervoltage lock-out  
circuitry is designed to operate with as  
little as 250µA of supply current  
permitting very efficient bootstrap  
designs.  
excellent value for cost conscious  
consumer applications.  
p ENHANCED LOAD RESPONSE  
CHARACTERISTICS  
p UNDER-VOLTAGE LOCKOUT WITH  
HYSTERESIS  
p DOUBLE PULSE SUPPRESSION  
p HIGH CURRENT TOTEM POLE OUTPUT  
Optimizing energy efficiency, the  
LX155X series demonstrates a signifi-  
cant 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 dissipa-  
(±1Amp peak)  
p 500kHz OPERATION  
APPLICATIONS  
PRODUCT HIGHLIGHT  
■ ECONOMY OFF-LINE FLYBACK OR  
FORWARD CONVERTERS  
TYPICAL APPLICATION OF LX155X USING ITS  
MICROPOWER START-UP FEATURE  
■ DC-DC BUCK OR BOOST CONVERTERS  
■ LOW COST DC MOTOR CONTROL  
T A B L E 1  
A V A I L A B L E O P T I O N S P E R P A R T #  
Design Using  
SG384x UC384xA LX155x  
R
ST  
Part #  
Start-Up Hysteresis Max. Duty  
Max. Start-up Current  
Specification (IST)  
1000µA 500µA 250µA  
Voltage  
16V  
Cycle  
<100%  
<100%  
<50%  
<50%  
I
ST  
AC  
Typical Start-Up  
Resistor Value (RST)  
INPUT  
LX1552  
LX1553  
LX1554  
LX1555  
6V  
0.8V  
6V  
62KΩ 124KΩ 248KΩ  
V
CC  
8.4V  
16V  
Max. Start-Up Resistor  
Power Dissipation (PR)  
2.26W 1.13W 0.56W  
LX1552  
or  
Note: Calculation is done for universal AC input speci-  
fication of VACMIN= 90VRMS to VACMAX= 265VRMS using the  
following equation: (Resistor current is selected to be  
LX1554  
8.4V  
0.8V  
2
IST at VACMIN.)  
*
2
VAC MIN  
2VAC  
MAX  
RST  
=
, PR =  
√2  
I
RST  
*
ST  
PACKAGE ORDER INFORMATION  
Plastic DIP  
8-pin  
Plastic SOIC  
8-pin  
Plastic SOIC  
14-pin  
Ceramic DIP  
8-pin  
TSSOP  
PW  
20-pin  
TA (°C)  
M
DM  
D
Y
0 to 70  
-40 to 85  
-55 to 125  
LX155xCM  
LX155xCDM  
LX155xIDM  
—
LX155xCD  
LX155xID  
—
—
—
LX155xCPW  
LX155xIM  
—
—
—
LX155xMY  
Note: All surface-mount packages are available in Tape & Reel. Append the letter "T" to part number. (i.e. LX1552CDMT)  
F O R F U R T H E R I N F O R M AT I O N C A L L ( 7 1 4 ) 8 9 8 - 8 1 2 1  
Copyright © 1994  
Rev. 1.0a 1/01  
1
11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841  
1234567...18

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