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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