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參數(shù)資料
| 型號： | MAX1542-MAX1543 |
| 廠商： | Maxim Integrated Products, Inc. |
| 元件分類： | 運動控制電子 |
| 英文描述： | TFT LCD DC-to-DC Converter with Operational Amplifiers |
| 中文描述： | 液晶式DC - DC轉(zhuǎn)換器的運算放大器 |
| 文件頁數(shù)： | 14/20頁 |
| 文件大小： | 506K |
| 代理商： | MAX1542-MAX1543 |
M
TFT LCD DC-to-DC Converter with
Operational Amplifiers
14
______________________________________________________________________________________
Thermal-Overload Protection
Thermal-overload protection prevents excessive power
dissipation from overheating the MAX1542/MAX1543.
When the junction temperature exceeds T
J
= +160
°
C, a
thermal sensor immediately activates the fault protec-
tion, which shuts down the device, allowing the IC to
cool. The input voltage must fall (below V
UVLO
) to clear
the fault latch and reactivate the controller.
Thermal-overload protection protects the controller in
the event of fault conditions. For continuous operation,
do not exceed the absolute maximum junction-temper-
ature rating of T
J
= +150
°
C.
Applications Information
Inductor Selection
The primary considerations in inductor selection are
inductor physical shape, circuit efficiency, and cost.
The factors that determine the inductance value are
input voltage, output voltage, switching frequency, and
maximum output current. Final inductor selection
includes ensuring the chosen inductor meets the appli-
cation
’
s peak current and RMS current requirements.
Very high inductance values minimize the current ripple
and therefore reduce the peak current, which decreas-
es core losses in the inductor and I
2
R losses in the cir-
cuit
’
s entire power path. However, large inductance
PGND
LX
FREQ*
FB
COMP
5
μ
A
N
ERROR
COMPARATOR
ERROR
AMPLIFIER
CLOCK
MAX1542
MAX1543
CURRENT
SENSE
CONTROL
AND DRIVER
LOGIC
SOFT-
START
SLOPE
COMPEN-
SATION
OSCILLATOR
1.24V
∑
IN
AGND
SWITCH
CONTROL
(SEE FIGURE 4)
OUT2
NEG2
POS2
OUT1
NEG1
POS1
DEL
CTL
SRC
COM
DRN*
SUP
EXT*
*MAX1543 ONLY.
5
μ
A
Figure 3. Functional Diagram
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1543ETP | 功能描述:LCD 驅(qū)動器 RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube |
| MAX1543ETP+ | 功能描述:LCD 驅(qū)動器 TFT LCD DC/DC Conv w/Op Amps RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube |
| MAX1543ETP+T | 功能描述:LCD 驅(qū)動器 TFT LCD DC/DC Conv w/Op Amps RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube |
| MAX1543ETP-T | 功能描述:LCD 驅(qū)動器 RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube |
| MAX1543EVKIT | 功能描述:顯示開發(fā)工具 MAX1542/3 Eval Kit RoHS:否 制造商:4D Systems 產(chǎn)品:4Display Shields 工具用于評估:?OLED-160-G1, ?OLED-160-G2 接口類型:Serial 工作電源電壓:5 V |
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