参数资料
型号: IR2175S
厂商: International Rectifier
英文描述: LINEAR CURRENT SENSING IC
中文描述: 线性电流感应集成电路
文件页数: 4/7页
文件大小: 107K
代理商: IR2175S
4
IR2175
(S) & (PbF)
www.irf.com
Application Hint:
Temperature drift of the output carrier frequency can be cancelled by measuring both a PWM period and the on-time
of PWM (Duty) at the same time. Since both periods vary in the same direction, computing the ratio between these
values at each PWM period gives consistent measurement of the current feedback over the temperature drift.
Vin+= -260mV
Vs = 0V
Vin+= +260mV
Vs = 0V
Duty=91%
Duty=9%
Carrier Frequency =
130kHz
PO
PO
Timing Waveforms
Figure 1 Output waveform
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