电源ic uc3854bdw原装现货
品牌 |
texas instruments |
型号 |
uc3854bdw |
批号 |
2010+ |
封装 |
sop |
营销方式 |
现货 |
产品性质 |
热销 |
处理信号 |
模拟信号 |
工艺 |
半导体集成 |
导电类型 |
双极型 |
集成程度 |
大规模 |
规格尺寸 |
原厂规格(mm) |
工作温度 |
0~70(℃) |
静态功耗 |
原厂规格(mw) |
| |
uc3854bdw
增强型高功率因子前置稳压器
全新原装现货,欢迎先购.
产品信息
特性
- controls boost pwm to near-unity power factor
- limits line current distortion to <3%
- world-wide operation without switches
- accurate power limiting
- fixed-frequency average current-mode control
- high bandwidth (5 mhz), low-offset current amplifier
- integrated current- and voltage-amplifier output clamps
- multiplier improvements: linearity, 500 mv vacoffset (eliminates external resistor), 0 v to 5 v multout common-mode range
- vrefgood comparator
- faster and improved accuracy enable comparator
- uvlo options (16 v/10 v or 10.5 v/10 v)
- 300-µa start-up supply current
说明
the uc3854a/b products are pin compatibleenhanced versions of the uc3854. like the uc3854, these products provide all of the functions necessary for active power factor corrected preregulators. the controller achieves near unity power factor by shaping the ac input line current waveform to correspond to the ac input line voltage. to do this the uc3854a/b uses average current mode control. average current mode control maintains stable, low distortion sinusoidal line current without the need for slope compensation, unlike peak current mode control.
a 1%, 7.5-v reference, fixed frequency oscillator, pwm, voltage amplifierwith soft-start, line voltage feedforward (vrmssquarer), input supply voltage clamp, and over current comparator round out the lilst of feataures.