- 您現(xiàn)在的位置：買(mǎi)賣(mài)IC網(wǎng) > PDF目錄384654 > MAX1889ETE (MAXIM INTEGRATED PRODUCTS INC) Triple-Output TFT LCD Power Supply with Fault Protection PDF資料下載
參數(shù)資料
| 型號(hào)： | MAX1889ETE |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類(lèi)： | 穩(wěn)壓器 |
| 英文描述： | Triple-Output TFT LCD Power Supply with Fault Protection |
| 中文描述： | 2.8 A SWITCHING REGULATOR, 1250 kHz SWITCHING FREQ-MAX, QCC16 |
| 封裝： | 5 X 5 MM, 0.80 MM HEIGHT, ULTRA THIN, QFN-16 |
| 文件頁(yè)數(shù)： | 24/32頁(yè) |
| 文件大?。?/td> | 796K |
| 代理商： | MAX1889ETE |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)當(dāng)前第24頁(yè)第25頁(yè)第26頁(yè)第27頁(yè)第28頁(yè)第29頁(yè)第30頁(yè)第31頁(yè)第32頁(yè)
M
Triple-Output TFT LCD Power Supply
with Fault Protection
24
______________________________________________________________________________________
Applications Information
PC Board Layout
Careful PC board layout is extremely important for
proper operation. Use the following guidelines for good
PC board layout:
1) Minimize the area of high-current loops by placing
the input capacitors, inductor, output diode, and
output capacitors less than 0.2in (5mm) from the LX
and PGND pins. Connect these components with
traces as wide as possible. Avoid using vias in the
high-current paths. If vias are unavoidable, use
many vias in parallel to reduce resistance and
inductance.
2) Create islands for the analog ground (GND), power
ground (PGND), and linear regulator ground. Star-
connect them to the backside pad of the device.
The REF bypass capacitor and both feedback
dividers should be connected to the analog ground
island (GND). The step-up regulator
’
s input and out-
put capacitors, and the charge-pump components
should be a wide power ground plane. The power
ground plane should be connected to the power
ground pin (PGND) with a wide trace. Maximizing
the width of the power ground traces improves effi-
ciency and reduces output voltage ripple and noise
spikes. All the other ground connections, such as
the IN pin bypass capacitor and the linear regulator
output capacitors, should be star-connected to the
backside of the device with wide traces. Make no
other connections between these separate ground
planes.
3) Place IN pin and REF pin bypass capacitors as
close to the device as possible.
4) Place all feedback voltage-divider resistors as close
to their respective feedback pins as possible. The
divider
’
s center trace should be kept short. Placing
the resistors far away causes their FB traces to
become antennas that can pick up switching noise.
Care should be taken to avoid running any feedback
trace near LX or the switching nodes in the charge
pumps.
5) Minimize the length and maximize the width of the
traces between the output capacitors and the load
for best transient responses.
6) Minimize the size of LX node while keeping it wide
and short. Keep the LX node away from feedback
nodes (FB, FBP, and FBN) and analog ground. Use
DC traces as shield if necessary.
Refer to the MAX1889 evaluation kit for an example of
proper board layout.
DRVP
FBP
DRVN
FBN
Q1
Q2
V
PL
7
6
8
9
REF
V
NL
V
N
V
P
MAX1889
C19
1000pF
R9
150k
1%
R8
3k
R10
24.3k
1%
R13
20k
1%
R12
301k
1%
C21
1000pF
R11
3k
Figure 8. LDO Compensation
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX1889 | Fixed-Point Digital Signal Processor 256-BGA |
| MAX1896 | 1.4MHz SOT23 Current-Mode Step-Up DC-DC Converter |
| MAX1896EUT-T | Fixed-Point Digital Signal Processor 532-FCBGA |
| MAX1898 | Fixed-Point Digital Signal Processor 532-FCBGA |
| MAX1898EUB41 | Linear Charger for Single-Cell Li Battery |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1889ETE+ | 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 Quad-Output TFT LCD Power Supply RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)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 |
| MAX1889ETE+T | 功能描述:LCD 驅(qū)動(dòng)器 Quad-Output TFT LCD Power Supply RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時(shí)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 |
| MAX1889ETE-T | 功能描述:LCD 驅(qū)動(dòng)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(shí)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 |
| MAX1889EVKIT | 功能描述:電源管理IC開(kāi)發(fā)工具 MAX1889 Eval Kit RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類(lèi)型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| MAX188ACAP | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Integrated Circuits (ICs) RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類(lèi)型:Differential 信噪比:107 dB 接口類(lèi)型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。