大师作文网电子类英文求翻译Soft-start allows a gradual increase of the internal
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电子类英文求翻译
Soft-start allows a gradual increase of the internal current-
limit level at start-up to reduce input surge currents.
Both SMPSs contain internal digital soft-start circuits,
each controlled by a counter, a digital-to-analog converter
(DAC), and a current-limit comparator. In shutdown
or standby mode, the soft-start counter is reset to
zero. When an SMPS is enabled, its counter starts
counting oscillator pulses, and the DAC begins incrementing
the comparison voltage applied to the currentlimit
comparator. The DAC output increases from 0mV to
100mV in five equal steps as the count increases to 512
clocks. As a result, the main output capacitor charges
up relatively slowly. The exact time of the output rise
depends on output capacitance and load current, and
is typically 1ms with a 300kHz oscillator
Soft-start allows a gradual increase of the internal current-
limit level at start-up to reduce input surge currents.
Both SMPSs contain internal digital soft-start circuits,
each controlled by a counter, a digital-to-analog converter
(DAC), and a current-limit comparator. In shutdown
or standby mode, the soft-start counter is reset to
zero. When an SMPS is enabled, its counter starts
counting oscillator pulses, and the DAC begins incrementing
the comparison voltage applied to the currentlimit
comparator. The DAC output increases from 0mV to
100mV in five equal steps as the count increases to 512
clocks. As a result, the main output capacitor charges
up relatively slowly. The exact time of the output rise
depends on output capacitance and load current, and
is typically 1ms with a 300kHz oscillator
软启动（装置或模式）使得启动电流逐渐上升,从而减小了输入电流的波动幅度,两种SMPSs（可能是软启动的模式部件）均有内置数字软启动电路,分别由一个计数器,一个数字-模拟转换器（DAC),和一个限流比较器控制,在停机或待机模式,软启动计数器归零,当一个SMPS被激活时,它的计数器就开计数振荡器的脉冲参数,DAC开始对限流比较器上的电压进行比较,在计数到512次的过程里,DAC的输出电压是分5步上升,范围由0毫伏--100毫伏,结果是主输出电容器充电相对缓慢,提高输出的确切时间在于输出的电容量和负荷电流,300千赫兹的振荡器一般需要1毫秒,仅供参考,因为本人这方面的知识太浅
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