參數(shù)資料
型號(hào): L9611C
廠商: 意法半導(dǎo)體
英文描述: PWM POWER MOS CONTROLLER
中文描述: 功率MOS的PWM控制器
文件頁(yè)數(shù): 9/12頁(yè)
文件大?。?/td> 198K
代理商: L9611C
Figure 5 :
ApplicationCircuit.
The sensing resistor R
S
and timing capacitor C
t
shouldbe dimensioned according to :
Si
R
S
=2Inom (V
2 x limitation time
K
T
C
t
=
In normal conditions(V
CC
= 14 V, maximum bright-
ness) the voltage drop across the sense resistor
must be 50 mV. The current limiter intervenes
attwicethe nominalcurrent, I
nom
.
ThetimingcapacitorC
t
(V
ct
=3.5V) mustbechosen
sothatthedelaybeforeinterventionistwice the du-
ration of the current limitation at power-on.
The optimalvalueofthe oscillatorfrequency,taking
tolerancesintoaccount,mustbeslightlyhigher than
the frequencyat whichlampflicker isnoticable(min
60 Hz).
The switching times are a compromise between
possibleEMI and switchingpower losses.The rec-
ommendedvalue for Cs is 47pF.
L9610C - L9611C
9/12
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