UC3845BD1R2GA 原装 DC DC 开关式控制器 的技术参数：

类别	集成电路（IC） PMIC - 稳压器 - DC DC 开关式控制器
制造商	onsemi
输出类型	晶体管驱动器
功能	升压，升压/降压
输出配置	正，可提供隔离
拓扑	反激，升压
输出数	1
输出阶段	1
电压 - 供电 (Vcc/Vdd)	7.6V ~ 30V
频率 - 开关	zui 高 500kHz
占空比（max）	48%
同步整流器	无
时钟同步	无
控制特性	频率控制
工作温度	0°C ~ 70°C（TA）
安装类型	表面贴装型
封装/外壳	8-SOIC（0.154"，3.90mm 宽）

UC3845BD1R2GA 原装 DC DC 开关式控制器 的描述：

Current Mode Controllers The UC3844B, UC3845B series are high performance fixed frequency current mode controllers. They are specifically designed for Off−Line and dc−dc converter applications offering the designer a cost−effective solution with minimal external components. 

These integrated circuits feature an oscillator, a temperature compensated reference, high gain error amplifier, current sensing comparator, and a high current totem pole output ideally suited for driving a power MOSFET. Also included are protective features consisting of input and reference undervoltage lockouts each with hysteresis, cycle−by−cycle current limiting, a latch for single pulse metering, and a flip−flop which blanks the output off every other oscillator cycle, allowing output deadtimes to be programmed from 50% to 70%. 

These devices are available in an 8−pin dual−in−line and surface mount (SOIC−8) plastic package as well as the 14−pin plastic surface mount (SOIC−14). The SOIC−14 package has separate power and ground pins for the totem pole output stage

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