參數資料
型號: IR2172S
廠商: International Rectifier
元件分類: XO, clock
英文描述: Linear Current Sensing. Direct Digital PWM Output. 1.5us Over-current Trip Signal Delay in a 8-lead SOIC package
中文描述: 線性電流感應。直接數字PWM輸出。 1.5us過流切斷信號延遲的8引腳SOIC封裝
文件頁數: 4/7頁
文件大?。?/td> 122K
代理商: IR2172S
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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