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LT1242CN8 PDF预览

LT1242CN8

更新时间： 2024-11-22 19:46:55
品牌 Logo 应用领域
凌特 - Linear 开关光电二极管
页数 文件大小 规格书
16页 280K
描述
LT1242 - High Speed Current Mode Pulse Width Modulators; Package: PDIP; Pins: 8; Temperature Range: 0°C to 70°C

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中文翻译

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LT1242CN8 技术参数

是否Rohs认证：不符合生命周期：Transferred
零件包装代码：DIP包装说明：DIP, DIP8,.3
针数：8Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.13Is 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：25 V
最小输入电压：11 VJESD-30 代码：R-PDIP-T8
JESD-609代码：e0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标称输出电压：2.5 V
封装主体材料：PLASTIC/EPOXY封装代码：DIP
封装等效代码：DIP8,.3封装形状：RECTANGULAR
封装形式：IN-LINE峰值回流温度（摄氏度）：NOT SPECIFIED
认证状态：Not Qualified座面最大高度：3.81 mm
子类别：Switching Regulator or Controllers最大供电电流 (Isup)：10 mA
表面贴装：NO切换器配置：SINGLE
最大切换频率：500 kHz技术：BIPOLAR
温度等级：COMMERCIAL端子面层：Tin/Lead (Sn/Pb)
端子形式：THROUGH-HOLE端子节距：2.54 mm
端子位置：DUAL处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：7.62 mmBase Number Matches：1

LT1242CN8 数据手册

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LT1241 Series  
High Speed Current Mode  
Pulse Width Modulators  
U
DESCRIPTIO  
EATURE  
S
F
Low Start-Up Current: < 250µA  
50ns Current Sense Delay  
Current Mode Operation: To 500kHz  
Pin Compatible with UC1842 Series  
Undervoltage Lockout with Hysteresis  
No Cross-Conduction Current  
The LT®1241 series devices are 8-pin, fixed frequency,  
currentmode,pulsewidthmodulators.Theyareimproved  
plugcompatibleversionsoftheindustrystandardUC1842  
series. These devices have both improved speed and  
lower quiescent current. The LT1241 series is optimized  
for off-line and DC/DC converter applications. They con-  
tain a temperature-compensated reference, high gain er-  
ror amplifier, current sensing comparator and a high  
current totem pole output stage ideally suited to driving  
power MOSFETs. Start-up current has been reduced to  
less than 250µA. Cross-conduction current spikes in  
the output stage have been eliminated, making 500kHz  
operation practical. Several new features have been incor-  
porated. Leading edge blanking has been added to the  
current sense comparator. Trims have been added to the  
oscillator circuit for both frequency and sink current, and  
both of these parameters are tightly specified. The output  
stage is clamped to a maximum VOUT of 18V in the  
on state. The output and the reference output are actively  
pulled low during undervoltage lockout.  
■
■
■
■
■
■
■
■
■
■
Trimmed Bandgap Reference  
1A Totem Pole Output  
Trimmed Oscillator Frequency and Sink Current  
Active Pull-Down on Reference and Output During  
Undervoltage Lockout  
■
■
High Level Output Clamp: 18V  
Current Sense LeO adU ing Edge Blanking  
PPLICATI  
S
A
■
Off-Line Converters  
DC/DC Converters  
■
, LTC and LT are registered trademarks of Linear Technology Corporation.  
W
BLOCK DIAGRA  
UV  
LOCKOUT  
REFERENCE ENABLE  
REFERENCE PULL-DOWN  
5V REF  
MAIN BIAS  
8
7
V
V
REF  
CC  
OUTPUT  
PULL-DOWN  
4
OSCILLATOR  
R /C  
T
T
T
6
5
OUTPUT  
GND  
S
R
5.6V  
1
2
1V  
COMP  
FB  
1mA  
–
+
2R  
BLANKING  
1.5V  
–
+
2.5V  
18V  
R
+
3
I
SENSE  
–
1241 BD01  
1
1234567...16

中文翻译

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LT1242CN8 替代型号

型号 品牌 替代类型 描述 数据表
LT1242MJ8 Linear

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