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參數(shù)資料
| 型號： | MAX1561 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | High-Efficiency. 26V Step-Up Converters for Two to Six White LEDs |
| 中文描述： | 高效率、26V、升壓型轉(zhuǎn)換器，用于2到6只白光LED |
| 文件頁數(shù)： | 8/10頁 |
| 文件大?。?/td> | 245K |
| 代理商： | MAX1561 |
M
input and output ripple, but at the expense of size and
higher cost. C
COMP
stabilizes the converter and con-
trols soft-start. Connect a 0.1μF capacitor from COMP
to GND. For stable operation, C
OUT
must not exceed
10 times C
COMP
.
Inductor Selection
Inductor values range from 10μH to 47μH. A 22μH
(47μH for the MAX1599) inductor optimizes the efficien-
cy for most applications while maintaining low 15mV
P-P
input ripple. With input voltages near 5V, a larger value
of inductance can be more efficient. To prevent core
saturation, ensure that the inductor-saturation current
rating exceeds the peak inductor current for the appli-
cation. Calculate the peak inductor current with the fol-
lowing formula:
Schottky Diode Selection
The MAX1561/MAX1599s
’
high switching frequency
demands a high-speed rectification diode (D1) for opti-
mum efficiency. A Schottky diode is recommended due
to its fast recovery time and low forward-voltage drop.
Ensure that the diode
’
s average and peak current rating
exceed the average output current and peak inductor
current. In addition, the diode
’
s reverse breakdown volt-
age must exceed V
OUT
. The RMS diode current can be
calculated from:
Applications Information
PC Board Layout
Due to fast switching waveforms and high-current
paths, careful PC board layout is required. An evalua-
tion kit (MAX1561EVKIT) is available to speed design.
Order MAX1599 samples separately.
When laying out a board, minimize trace lengths between
the IC and R
SENSE
, the inductor, the diode, the input
capacitor, and the output capacitor. Keep traces short,
direct, and wide. Keep noisy traces, such as the LX node
trace, away from CS. The IN bypass capacitor (C
IN
)
should be placed as close to the IC as possible. PGND
and GND should be connected directly to the exposed
paddle underneath the IC. The ground connections of
C
IN
and C
OUT
should be as close together as possible.
The traces from IN to the inductor and from the Schottky
diode to the LEDs may be longer.
Chip Information
TRANSISTOR COUNT: 2895
PROCESS: BiCMOS
I
I
I
DIODE RMS
OUT
PEAK
(
)
×
I
V
I
V
V
s
L
PEAK
OUT MAX
(
0 8
LED MAX
(
IN MIN
(
IN MIN
(
=
×
×
+
×
μ
×
)
)
)
)
.
.
0 8
2
High-Efficiency, 26V Step-Up Converters
for Two to Six White LEDs
8
_______________________________________________________________________________________
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PDF描述 |
|---|---|
| MAX1599 | High-Efficiency. 26V Step-Up Converters for Two to Six White LEDs |
| MAX1599ETA | High-Efficiency, 26V Step-Up Converters for Two to Six White LEDs |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1561ETA | 制造商:Maxim Integrated Products 功能描述:HIGH-EFFICIENCY, 26V STEP-UP CONVERTER FOR 2 - Rail/Tube |
| MAX1561ETA+ | 制造商:Maxim Integrated Products 功能描述:LED DRVR 6SEGMENT 3.3V/5V 8TDFN EP - Rail/Tube |
| MAX1561ETA+T | 功能描述:LED照明驅(qū)動器 26V StepUp Converter for 2-6 White LEDs RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| MAX1561ETA-T | 功能描述:LED照明驅(qū)動器 26V StepUp Converter for 2-6 White LEDs RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| MAX1561EVKIT | 功能描述:LED 照明開發(fā)工具 Evaluation Kit for MAX1561 RoHS:否 制造商:Fairchild Semiconductor 產(chǎn)品:Evaluation Kits 用于:FL7732 核心: 電源電壓:120V 系列: 封裝: |
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