參數(shù)資料
型號： MAX1776
廠商： Maxim Integrated Products, Inc.
英文描述： 32-Bit Digital Signal Controller with ROM 100-BGA MICROSTAR -40 to 85
中文描述： 24V、600mA內(nèi)置開關(guān)、100%占空比、降壓型轉(zhuǎn)換器
文件頁數(shù)： 12/13頁
文件大?。?/td> 740K
代理商： MAX1776
M
Diode Selection
The current in the external diode (D1 in Figure 1)
changes abruptly from zero to its peak value each time
the LX switch turns off. To avoid excessive losses, the
diode must have a fast turn-on time and a low forward
voltage.
Make sure that the diode
’
s peak current rating exceeds
the peak current limit set by the current limit, and that
its breakdown voltage exceeds V
IN
. Use Schottky
diodes when possible.
MAX1776 Stability
Instability is frequently caused by excessive noise on
OUT, FB, or GND due to poor layout or improper com-
ponent selection. Instability typically manifests itself as
“
motorboating,
”
which is characterized by grouped
switching pulses with large gaps and excessive low-
frequency output ripple during no-load or light-load
conditions.
PC Board Layout and Grounding
High switching frequencies and large peak currents
make PC board layout an important part of the design.
Poor layout introduces switching noise into the feed-
back path, resulting in jitter, instability, or degraded
performance. High-power traces, highlighted in the
24V, 600mA Internal Switch, 100% Duty Cycle,
Step-Down Converter
12
______________________________________________________________________________________
Table 3. Recommended Components
CIRCUIT
INPUT
VOLTAGE
(V)
MAXIMUM
LOAD
CURRENT
(mA)
I
LX(PEAK)
CURRENT
(A)
INDUCTOR
CAPACITOR
1
10 to 24
600
1.20
10μH, 1.56A, 70m
Toko D75F 646FY-100M,
10μH, 1.70A, 48m
Sumida CDRH6D28-100NC,
or 10μH, 1.63A, 55m
Toko D75C 646CY-100M 0.055
22μH, 1.17A, 120m
Toko D75F 646FY-220M,
22μH, 1.09A, 115m
Toko D75C 646CY-220M,
or
22μH, 1.20A, 95m
Sumida CDRH6D28-220NC
47μH, 0.54A, 440m
Sumida CDRH5D18-470
100μF, 6.3V
Sanyo POSCAP 6TPC100M
2
10 to 24
300
0.60
47μF, 6.3V
Sanyo POSCAP 6TPA47M
3
10 to 24
150
0.30
22μF, 6.3V, 1210 case
Taiyo Youden JMK325BJ226MM
4
10 to 24
75
0.15
100μH, 0.29A, 766m
Sumida CDRH4D28-101
10μF, 6.3V, X7R, 1206 case
Taiyo Youden JMK316BJ106ML
5
5 to 15
600
1.20
5.4μH, 1.6A, 56m
Sumida CDRH5D18-5R4
100μF, 6.3V
Sanyo POSCAP 6TPC100m
6
5 to 15
300
0.60
10μH, 1.04A, 80m
Toko D73LC 817CY-100M
47μF, 6.3V
Sanyo POSCAP 6TPA47M
7
5 to 15
150
0.30
22μH, 0.41A, 294m
Sumida CDRH4D18-220
22μF, 6.3V, 1210 case
Taiyo Youden JMK325BJ226MM
8
5 to 15
75
0.15
47μH, 0.33A, 230m
Coilcraft DS1608C-473
10μF, 6.3V, X7R, 1206 case
Taiyo Youden JMK316BJ106ML
相關(guān)PDF資料
PDF描述
MAX1776EUA 24V, 600mA Internal Switch, 100% Duty Cycle, Step-Down Converter
MAX1777EEI 32-Bit Digital Signal Controller with ROM 100-BGA MICROSTAR -40 to 125
MAX1777 High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers
MAX1777-MAX1999 High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers
MAX1977 High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX1776EUA 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
MAX1776EUA+ 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 24V 600mA 100% Duty Cycle Step-Down RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
MAX1776EUA+ 制造商:Maxim Integrated Products 功能描述:SEMICONDUCTOR ((NW))
MAX1776EUA+ 制造商:Maxim Integrated Products 功能描述:CONVERTER STEP DOWN 24V 0.6A SMD 制造商:Maxim Integrated Products 功能描述:CONVERTER, STEP DOWN, 24V 0.6A, SMD
MAX1776EUA+T 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 24V 600mA 100% Duty Cycle Step-Down RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
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