參數(shù)資料
型號(hào)： MC44608P75
廠商： ON SEMICONDUCTOR
元件分類： 穩(wěn)壓器
英文描述： Few External Components Reliable Flexible GreenLine Very High Voltage PWM Controller
中文描述： SWITCHING CONTROLLER, 82 kHz SWITCHING FREQ-MAX, PDIP8
封裝： PLASTIC, DIP-8
文件頁數(shù)： 10/16頁
文件大?。?/td> 266K
代理商： MC44608P75
MC44608
http://onsemi.com
10
EQUATION 7
dBM
1
1
IccS
IG
Istup
kS Stup
kS L
Istup
IccL
Ipin3
EQUATION 8
dBM
1
1
k1
IG
Istup
kS Stup
(kS L
1
Ipin3
Istup
k2
)
where: k1 = Iccs/Istup
k2 = IccL/Istup
kS/Stup = (Vstup–UVLO2)/(Vstup–UVLO1)
kS/L = (UVLO1–UVLO2)/(Vstup–UVLO1)
PULSED MODE CURRENT SENSE CLAMPING LEVEL
Equations 9, 10, 11 and 12 allow the calculation of the Rcs value for the desired maximum current peak value during the
SMPS stand–by mode.
EQUATION 9
Ipkstby
Vcs–th
(Rcs
RS
Ics)
where: Vcs–th is the CS comparator threshold
Ics is the CS internal current source
RS is the sensing resistor
Rcs is the resistor connected between pin 2 and RS
EQUATION 10
Ipkstby
Vcs–th
1
Rcs
Ics
Vcs–th
RS
EQUATION 11
Ipkstby
Vcs–th
1
(Rcs
Ycs–stby)
RS
where: Ycs–stby = Ics/Vcs–th
Taking into account the circuit propagation delay ( tcs) and the Power Switch reaction time ( tps):
EQUATION 12
Ipkstby
Vcs–th
1
(Rcs
Ycs–stby)
RS
Vin
( tcs
Lp
tps)
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