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參數(shù)資料
| 型號(hào)： | LX1745-CPW |
| 廠商： | MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP |
| 元件分類： | 顯示驅(qū)動(dòng)器 |
| 英文描述： | Triple Output Boost ? LED Driver / LCD Bias |
| 中文描述： | LED DISPLAY DRIVER, PDSO20 |
| 封裝： | TSSOP-20 |
| 文件頁數(shù)： | 14/16頁 |
| 文件大?。?/td> | 439K |
| 代理商： | LX1745-CPW |
LX1745
P
RODUCTION
D
ATASHEET
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 14
W
M
.
C
Triple Output Boost – LED Driver / LCD Bias
I N T E G R A T E D P R O D U C T S
Copyright
2000
Rev. 1.1a, 2004-02-06
VOUT VERSUS VADJ
GATE DRIVE
0
5
10
15
20
25
30
0
0.5
1
1.5
2
Adjustment Signal Voltage (VADJx)
O
Figure 12
– Output Voltage Vs. Adjustment Signal Threshold
Note:
The LX1745 uses the internal voltage reference
until the VADJ signal exceeds 0.5V (typ).
0
1
2
3
4
5
6
0
20
40
60
80
100
120
140
160
DRV Current (mA)
D
Figure 13 –
Gate Drive Voltage Vs. Drive Current
V
IN
= 5V, T
A
= 25
°
C
WAVEFORM
EFFICIENCY
Figure 14
– Typical Switching Waveform
CH1
– SWx Voltage,
CH2
– Output Voltage,
CH3
– Inductor Current
V
IN
= 3.6V, V
OUT
= 18V, I
OUT
= 9mA
50%
55%
60%
65%
70%
75%
80%
85%
90%
0
5
10
15
20
25
Output Current (mA)
E
Figure 15 –
LED Driver (Upper) and LCD Bias Efficiency
V
IN
= 5V, Four LEDs, L = 47
μ
H, R
CS
= 4k
V
IN
= 3.6V, V
OUT
= 5.5V, L = 47
μ
H
C
H
A
R
T
S
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