PWM 控制器
DESCRIPON
The UC1842/3/4/5 family of control ICs provides the necessary features to implement off-line or DC to DC fixed frequency current mode control schemes with a minimal external parts count. Internally implemented circuits include under-voltage lockout featuring start up current less than 1mA, a precision reference trimmed for accuracy at the error amp input, logic to insure latched
operation, a PWM comparator which also provides current limit control, and a totem pole output stage designed to source or sink high peak current. The output stage, suitable for driving N Channel MOSFETs, is low in the off state.
FEATURES
• Optimized For Off-line And DC To DC Converters
• Low Start Up Current <1mA
• Automatic Feed Forward Compensation
• Pulse-by-pulse Current Limiting
• Enhanced Load Response Characteristics
• Under-voltage Lockout With Hysteresis
• Double Pulse Suppression
• High Current Totem Pole Output
• Internally Trimmed Bandgap Reference
• 500khz Operation
• Low ROError Amp
频率 450 kHz
输出接口数 1
输入电压DC 25.0 V
输出电压 13.5 V
输出电流 1000 mA
供电电流 25 mA
调节输出数 1
上升时间 150 ns
开关频率 500 kHz
拓扑结构 Boost, Flyback, Forward
占空比 50 %
最大占空比 48 %
下降时间 150 ns
安装方式 Surface Mount
引脚数 8
封装 SOIC-8
封装 SOIC-8
工作温度 -40℃ ~ 85℃ TA
产品生命周期 Active
包装方式 Tape & Reel TR
RoHS标准 RoHS Compliant
含铅标准 Lead Free
ECCN代码 EAR99
型号/品牌 | 代替类型 | 替代型号对比 |
---|---|---|
UC2845D8TR TI 德州仪器 | 当前型号 | 当前型号 |
UC2845D8 德州仪器 | 完全替代 | UC2845D8TR和UC2845D8的区别 |
UC3843D8TR 德州仪器 | 完全替代 | UC2845D8TR和UC3843D8TR的区别 |
UC2845D8G4 德州仪器 | 完全替代 | UC2845D8TR和UC2845D8G4的区别 |