- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄383331 > MAX1664 (Maxim Integrated Products, Inc.) Active-Matrix Liquid Crystal Display AMLCD Supply PDF資料下載
參數(shù)資料
| 型號： | MAX1664 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Active-Matrix Liquid Crystal Display AMLCD Supply |
| 中文描述： | 有源點陣液晶顯示器(AMLCD)電源 |
| 文件頁數(shù)： | 11/16頁 |
| 文件大小： | 249K |
| 代理商： | MAX1664 |
M
Ac tive-Matrix Liquid Crystal Display
(AMLCD) S upply
______________________________________________________________________________________
11
Induc tor S elec tion
The optimum inductor value for L1 is 3.3μH, as shown
in Figure 4. Inductors with less than 300m
DC series
resistance are recommended to achieve the highest
efficiency. Using a larger value for L1 (e.g., 4.7μH)
increases the output current capability of DC-DC 1 (by
reducing the peak ripple current) at the expense of size
and the additional output filter capacitance needed for
loop stability.
For DC-DC 2, at large input voltages (i.e., 5V) and low
switching frequencies (i.e.,
≤
400kHz), the value of L2
should be increased (e.g., 6.8μH or 10μH) to limit the
peak current. In some cases it may be necessary to
reduce the value of L2 to increase the output current
capability of DC-DC 2 (Table 2). The relationship between
input voltage, output voltage, switching frequency, induc-
tor value, and maximum load current for DC-DC 2 is com-
plex and nonlinear. This relationship is summarized in
Table 2. The L2 equation is as follows:
where:
Internal MOSFET on-resistance:
R
ON(LX2P)
= R
ON(LX2N)
= 0.9
typical
External inductor DC resistance:
R
L2
= 0.3
typical
Inductor peak current:
I
PEAK
= 700mA (750mA absolute maximum)
Due to the MAX1664’s high switching frequency, induc-
tors with a high-frequency core material such as ferrite
are recommended. Powdered iron compounds are not
recommended due to their higher core losses. Typical
small-size, low-profile inductors include the ILS-3825
(Dale Electronics-Vishay) and the CLQ61B (Sumida).
These inductors are primarily used for DC -DC
converters with low height requirements. See Table 3
for more information on manufacturers who provide
low-profile inductors.
L2
V
- R
[
R
R
(I
]
)
2
I
x 2 f
INP
ON(LX2P)
ON(LX2N)
(
L2
PEAK
PEAK
DC-DC 1
>
+
+
)
REF
FB2-
IN
INP
LX2P
LX2N
FB2+
R8
49.9k
R7
549k
R6
200k
R5
49.9k
D3
D2
L2
4.7
μ
H
PGND2
PLLC
GND
FPLL
RDY
REF
SHDN
ON
OFF
V
OUT1
5.5V
2.2
μ
F
3 x 10
μ
F
0.22
μ
F
22nF
100k
2.2nF
0.22
μ
F
0.47
μ
F
50pF
2 x 10
μ
F
10
μ
F
10
μ
F
2.2
μ
F
33
0.47
μ
F
3.3
μ
H
R1
301k
R2
100k
R3
100k
R4
100k
V
OUT2-
-5V
V
OUT2+
15V
BPV
SS
BACKPLANE
DRIVER
V
SUPPLY
2.8V TO5.5V
BPDRV
BPV
DD
PGND1
FB1
LX1
BPCLK
MAX1664
Figure 4. Detailed Typical Operating Circuit
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX1664CUP | Active-Matrix Liquid Crystal Display AMLCD Supply |
| MAX1665S | Lithium-Ion Battery Pack Protector |
| MAX1665V | Lithium-Ion Battery Pack Protector |
| MAX1665X | Lithium-Ion Battery Pack Protector |
| MAX1665XESA | Lithium-Ion Battery Pack Protector |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1664CUP | 制造商:Maxim Integrated Products 功能描述:ACTIVE-MATRIX LIQUID CRYSTAL DISPLAY (AMLCD) - Bulk |
| MAX1664CUP+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX1664EAP+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX1664EUP | 制造商:Maxim Integrated Products 功能描述:ACTIVE-MATRIX LIQUID CRYSTAL DISPLAY (AMLCD) - Bulk 制造商:Rochester Electronics LLC 功能描述: |
| MAX1664EUP+ | 制造商:Maxim Integrated Products 功能描述:ACTIVE-MATRIX LIQUID CRYSTAL DISPLAY (AMLCD) SUPPLY - Rail/Tube |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。