参数资料
型号: IR2172
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: 122K
代理商: IR2172
4
IR2172
ADVANCE INFORMATION
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.
AC Electrical Characteristics cont.
V
CC
= V
BS
= 15V, unless otherwise specified.
Symbol
Proagation delay characteristics
tdoc
Propagation delay time of OC
Definition
Min.
Typ. Max. Units Test Conditions
1
1.5
twoc
Low true pulse width of OC
1
μ
sec
Vin+= -260mV
Vin- = 0V
Vin+= +260mV
Vin- = 0V
Duty=93%
Duty=7%
Carrier Frequency =
40kHz
PO
PO
Timing Waveforms
Figure 1 Output waveform
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