參數(shù)資料
型號(hào): MC44608P40
廠商: ON SEMICONDUCTOR
元件分類(lèi): 穩(wěn)壓器
英文描述: RW-S Series - Econoline Regulated DC-DC Converters; Input Voltage (Vdc): 05V; Output Voltage (Vdc): 09V; Power: 2W; DIP24 Low Profile Miniature Package; 1kVDC Isolation; Feedback Regulated Output; 2:1 Wide Range Voltage Input; Continuous Short Circuit Protection; Less than 7mm Height; SMD Pinning Option; Efficiency to 87%
中文描述: SWITCHING CONTROLLER, 44 kHz SWITCHING FREQ-MAX, PDIP8
封裝: PLASTIC, DIP-8
文件頁(yè)數(shù): 9/16頁(yè)
文件大小: 266K
代理商: MC44608P40
MC44608
http://onsemi.com
9
EQUATION 1
Start–up Phase Duration:
tstart–up
CVcc
(Vstup
Istup
UVLO2)
where: Istup is the start–up current flowing through VCC pin
CVcc is the VCC capacitor value
EQUATION 2
Switching Phase Duration:
tswitch
CVcc
(Vstup
IccS
UVLO1)
IG
where: IccS is the no load circuit consumption in switching phase
IG is the current consumed by the Power Switch
EQUATION 3
Latched–off Phase Duration:
tlatched
off
CVcc
(UVLO1
IccL
UVLO2)
Ipin3
where: IccL is the latched off phase consumption
Ipin3 is the current drawn from pin3 adding a resistor
EQUATION 4
Burst Mode Duty Cycle:
dBM
tswitch
tswitch
tstart
up
tlatched
off
EQUATION 5
dBM
CVcc
(Vstup
IccS
(Vstup
IccS
UVLO1)
IG
CVcc
(Vstup
Istup
UVLO2)
CVcc
UVLO1)
IG
CVcc
(UVLO1
IccL
UVLO2)
Ipin3
EQUATION 6
dBM
1
1
kS Stup
IccS
IG
Istup
kS L
IccS
IccL
IG
Ipin3
where: kS/Stup = (Vstup – UVLO2)/(Vstup – UVLO1)
kS/L = (UVLO1 – UVLO2)/(Vstup – UVLO1)
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