參數(shù)資料
型號: LX1741CLM-TR
廠商: MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP
元件分類: 穩(wěn)壓器
英文描述: 0.145 A SWITCHING CONTROLLER, PDSO8
封裝: PLASTIC, MLP-8
文件頁數(shù): 3/15頁
文件大小: 479K
代理商: LX1741CLM-TR
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 11
Copyright
2000
Rev. 1.1b, 2005-03-03
WWW
.Microse
m
i
.CO
M
LX1741
High Efficiency High Voltage Boost Controller
PRODUCTION DATA SHEET
I N T E GRA T ED
PR ODUC T S
EVALUATI ON BOA RD ( C ONTI N UED)
VBAT
GND
VCC
SHDN
VADJ
VOUT
GND
C5
4.7F
25V
C1
1000pF
50V
C4
4.7F
25V
C2
0.1F
50V
C3
2.2F
16V
R7
10K
R8
4.02K
R3
619K
R4
100K
R2
49.9K
R1
698K
R5
1K
R6
1K
JB1
V
CC
JB2
REF
ADJ
JB4
VLIM
Q2
MMBT3904LT1
CR1
UPS5819
LX1741
Q1
FDV303N
VR1
24V
225mW
BZX84C24LT1
L1
47H
X
Figure 8
– LX1741 Boost Evaluation Board Schematic
CHARACT ER I S TI C CURVES
Channel 1
Channel 2
Figure 9 –
VOUT and Inductor Current Waveforms
Channel 1: VOUT (AC coupled; 100mV/div)
Channel 2: Inductor Current (100mA/div.)
Configuration: VIN = 1.6V, VOUT = 5.0V, IOUT = 20.0mA
0
5
10
15
20
25
30
0.1 0.2 0.3
0.4 0.5 0.6
0.7 0.8
0.9
1
1.1
1.2
1.3
1.4
1.5
1.6
1.7
Adj ustment Voltage
Output
Volta
g
e
F
igure 10 –
Typical VOUT versus VADJ
0 ~ 0.6V : LX1741 uses internal 1.29V reference.
0.7V ~ 0.8V : transition from internal to external reference.
0.9 to 1.6V : LX1741 defaults to external voltage reference.
CC
HH
AA
RR
TT
SS
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