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MAX1530|MAX1531

更新时间： 2024-11-20 23:45:47
品牌 Logo 应用领域
美信 - MAXIM 显示器控制器
页数 文件大小 规格书
33页 697K
描述
Multiple-Output Power-Supply Controllers for LCD Monitors

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MAX1530|MAX1531 数据手册

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19-2866; Rev 0; 5/03  
Multiple-Output Power-Supply Controllers for  
LCD Monitors  
General Description  
Features  
The MAX1530/MAX1531 multiple-output power-supply  
controllers generate all the supply rails for thin-film tran-  
sistor (TFT) liquid-crystal display (LCD) monitors. Both  
devices include a high-efficiency, fixed-frequency,  
step-down regulator. The low-cost, all N-channel, syn-  
chronous topology enables operation with efficiency as  
high as 93%. High-frequency operation allows the use  
of small inductors and capacitors, resulting in a com-  
pact solution. The MAX1530 includes three linear regu-  
lator controllers and the MAX1531 includes five linear  
regulator controllers for supplying logic and LCD bias  
voltages. A programmable startup sequence enables  
easy control of the regulators.  
ꢀ 4.5V to 28V Input Voltage Range  
ꢀ 250kHz/500kHz Current-Mode Step-Down Converter  
Small Inductor/Capacitors  
No Sense Resistor  
ꢀ Three Positive Linear Regulator Controllers  
One Positive and One Negative Additional  
Controller (MAX1531)  
Small Input and Output Capacitors  
ꢀ Timed Reset Output  
ꢀ Uncommitted Overcurrent Protection (MAX1531)  
ꢀ Soft-Start for All Regulators  
ꢀ Programmable Input Undervoltage Comparator  
ꢀ Programmable Startup Sequencing  
The MAX1530/MAX1531 include soft-start functions to  
limit inrush current during startup. An internal step-  
down converter current-limit function and a versatile  
overcurrent shutdown protect the power supplies against  
fault conditions. The MAX1530/MAX1531 use a current-  
mode control architecture, providing fast load transient  
response and easy compensation. An internal linear  
regulator provides MOSFET gate drive and can be  
used to power small external loads.  
Minimal Operating Circuit  
V
IN  
V
P
V
IN  
V
L
CSH  
CSL  
V
N
The MAX1530/MAX1531 can operate from inputs as  
high as 28V and are well suited for LCD monitor and TV  
applications running directly from AC/DC wall adapters.  
Both devices are available in a small (5mm x 5mm),  
ultra-thin (0.8mm), 32-pin QFN package and operate  
over the -40°C to +85°C temperature range.  
BST  
V
= 12V  
IN  
IN  
DRV4  
FBL4  
V
SOURCE  
10V/500mA  
DH  
V
OUT  
3.3V/1.5A  
LX  
MAX1530  
Applications  
DL  
EN  
ILIM  
LCD Monitors and TVs  
Automotive LCDs  
PGND  
V
FREQ  
VL  
L
FB  
COMP  
AGND  
RESET  
RSTIN  
Ordering Information  
V
IN  
PART  
TEMP RANGE  
-40°C to +85°C  
-40°C to +85°C  
PIN-PACKAGE  
32 Thin QFN  
32 Thin QFN  
DRV2  
FBL2  
V
OUT  
MAX1530ETJ  
MAX1531ETJ  
V
GAMMA  
9.7V  
DRV1  
FBL1  
V
LOGIC  
2.5V/500mA  
ONL2  
ONL3  
ONL4  
ONL5  
V
L
SEQ  
V
V
V
P
N
Pin Configuration appears at end of data sheet.  
DRV3  
FBL3  
DRV5  
FBL5  
V
GON  
25V  
GOFF  
-9V  
VL  
________________________________________________________________ Maxim Integrated Products  
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at  
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.  
1234567...33

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