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参数资料
| 型号： | MAX1513ETP+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 23/28页 |
| 文件大小： | 0K |
| 描述： | IC CNTRLR TFT-LCD PS 20-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 75 |
| 应用： | 控制器，TFT LCD |
| 输入电压： | 2.7 V ~ 5.5 V |
| 输出数： | 1 |
| 输出电压： | 2.7 V ~ 50 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-WFQFN 裸露焊盘 |
| 供应商设备封装： | 20-TQFN-EP（4x4） |
| 包装： | 管件 |
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TFT-LCD Power-Supply Controllers
determines the frequency placement of the zero and
pole. A typical value of C1 is between 100pF and 10nF.
When adding lead compensation, always check the
loop stability by monitoring the transient response to a
pulsed output load.
Adding lag compensation (the R4/C2 network from FB
to ground in Figure 11) decreases the loop bandwidth
and improves FB noise immunity. Lag compensation
slows the transient response but can increase the stabil-
ity margin, which may be needed for particular compo-
nent choice or high values of FB-divider resistors. Lag
compensation adds a pole-zero pair, attenuating gain at
higher frequencies and lowering loop bandwidth. The
frequencies of the pole and zero for lag compensation
depend on the feedback-divider resistors and the RC
network between FB and GND. The frequencies of the
pole and zero for the lag compensation are:
mines the frequency placement of the pole and zero. A
typical value of C2 is between 100pF and 1000pF.
When adding lag compensation, always check the loop
stability by monitoring the transient response to a
pulsed output load.
Using Lead Compensation to Reduce
Startup Inrush Current
The digital soft-start of the main step-up regulator limits
the average input current during startup. If even
smoother startup is needed, add a low-frequency lead-
compensation network (Figure 12). The improved soft-
start is active only during soft-start when the output
voltage rises. Positive changes in the output are instan-
taneously coupled to the FB pin through D1 and the
feed-forward capacitor C1. This arrangement gener-
ates a smoothly rising output voltage. When the output
voltage reaches regulation, capacitor C1 charges up
2 π × ? R 4 +
? × C 2
f P _ LAG =
?
?
1
R1 × R2 ?
R 1 + R 2 ?
through R3 and diode D1 turns off. If desired, C1 and
R3 can be chosen to also provide some lead compen-
sation in normal operation. In most applications, lead
compensation in normal operation is not needed and
f Z _ LAG =
1
2 π × R 4 × C 2
can be avoided by making R3 large. With R3 much
greater than R1, the pole and the zero in the compen-
sation network are very close to one another after start-
At high frequencies, R4 is effectively in parallel with R2,
increasing the divider attenuation ratio. If R4 is very
large, the attenuation ratio remains unchanged and as
R4 approaches zero, the attenuation ratio approaches
infinity. A typical value for R4 is greater than 0.1 times
R2. If high-value divider-resistors are used, choose R4
< 1.5k ? for FB noise immunity. The value of C2 deter-
up and cancel out, eliminating the effect of the lead
compensation. With R2 at 10k ? , an effective value for
C1 is approximately 1000pF.
Charge Pumps
V IN
L
LX
D
R1
R3
C1
V MAIN
V IN
L
LX
D
R1
R3
C1
D1
V MAIN
FB
C OUT
R LOAD
FB
C OUT
R4
MAX1513
MAX1514
R2
C2
MAX1513
MAX1514
R2
GND
Figure 11. Feedback Compensation
GND
Figure 12. Using Lead Compensation for Improved Soft-Start
______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1513ETP+ | 功能描述:显示驱动器和控制器 TFT-LCD Power Supply Controller RoHS:否 制造商:Panasonic Electronic Components 工作电源电压:2.7 V to 5.5 V 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Reel |
| MAX1513ETP+T | 功能描述:显示驱动器和控制器 TFT-LCD Power Supply Controller RoHS:否 制造商:Panasonic Electronic Components 工作电源电压:2.7 V to 5.5 V 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Reel |
| MAX1513ETP-T | 功能描述:显示驱动器和控制器 RoHS:否 制造商:Panasonic Electronic Components 工作电源电压:2.7 V to 5.5 V 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Reel |
| MAX1513EVKIT | 功能描述:电源管理IC开发工具 MAX1513/14 Eval Kit RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| MAX1514ETP | 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
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