Current Mode PWM Controller 1A 500kHz 8Pin SOIC N
DESCRIPTION
The LT®1241 series devices are 8-pin, fixed frequency, current mode, pulse width modulators. They are improved plug compatible versions of the industry standard UC1842 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 contain a temperature-compensated reference, high gain error 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.
FEATURES
■ 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
■ 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 Leading Edge Blanking
APPLICATIONS
■ Off-Line Converters
■ DC/DC Converters
电源电压DC 25.0V max
输出接口数 1
耗散功率 1000 mW
静态电流 170 µA
上升时间 50 ns
开关频率 500 kHz
占空比 96 %
最大占空比 96 %
下降时间 30 ns
工作温度Max 100 ℃
工作温度Min -40 ℃
耗散功率Max 1000 mW
电源电压 8.2V ~ 25V
安装方式 Surface Mount
引脚数 8
封装 SOIC-8
封装 SOIC-8
工作温度 -40℃ ~ 100℃
包装方式 Tube
RoHS标准 Non-Compliant
含铅标准 Contains Lead
ECCN代码 EAR99