參數(shù)資料
型號(hào): LX1671-CPW
廠商: MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP
元件分類: 穩(wěn)壓器
英文描述: 1 A SWITCHING CONTROLLER, 345 kHz SWITCHING FREQ-MAX, PDSO38
封裝: PLASTIC, TSSOP-38
文件頁(yè)數(shù): 5/21頁(yè)
文件大?。?/td> 447K
代理商: LX1671-CPW
Microsemi
Integrated Products, Power Management
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 13
Copyright
2000
Rev. 1.0a, 2004-06-14
WWW
.Microse
m
i
.CO
M
LX1671
Multiple Output LoadSHARE PWM
PRODUCTION DATA SHEET
I N T E GRA T ED
PR ODUC T S
TH EORY OF O PERAT ION (CON TINUE D)
L1,
Switch
Side
L2,
Switch
Side
100
Not
Used
62k
4700pF
+
-
62k
4700pF
62k
TBD
100
Offset
Voltage
Generator
-
+
ESR L1
10m
ESR L2
10m
Vout
1.5V @ 12A
18W
Resistor
Divider
Resistor
Divider
Phase 2
Error Amp
Phase 1
Phase 2
V1
V2
1.5V
+73.3mV
1.5V
+46.7mV
7.33A
4.67A
+5V @ 7W
+3.3V @ 11W
LPF1
LPF2
FB2
RF2
PWM
Input
Figure 8 – LoadSHARE Using Feedback Divider Offset
Where V1 = 1.5467 ; V2 = 1.5733 and
2
V
1
V
K =
then
K
5.814
K
1
100
K
TBD
=
×
=
AA
PP
LL
IICC
AA
TT
IIOO
NN
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LX1671-CLQTR 1 A SWITCHING CONTROLLER, 345 kHz SWITCHING FREQ-MAX, PQCC38
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