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| 型号： | MAX1513ETP+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 19/28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： | 2,500 |
| 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： | 带卷 (TR) |
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TFT-LCD Power-Supply Controllers
5) If V SENSE is greater than 100mV, the current-feed-
back signal is too high and can trip the current limit
before the full load current is delivered. Use the cur-
τ =
2.2 μ H
24 m ?
= 91 . 7 μ s
rent-sense configuration in Figure 9 to attenuate the
sense signal. Define the scale factor (SF) as:
Select C S = 0.1μF and calculate R S :
SF =
100 mV
V SENSE
R S =
91.7 μ s
0 . 1 μ F
= 917 ?
Calculate R S1 and R S2 :
Assuming ? T is 40 ° C and TC is 0.5%, the worst-case
high sense voltage over temperature is:
R S 1 =
R S 2 =
R S
SF
R S 1 × SF
1 - SF
V SENSE = 2 . 6 A × 30 m ? ( 1 + 0 . 005 × 40 ° C ) = 93 . 6 mV
Because V SENSE would be between 80mV and 100mV,
the circuit in Figure 8 should be used. The closest 1%
standard value for R S is 909 ? .
6) If V SENSE is less than 80mV, the current-feedback
signal is low relative to the current-limit threshold. Use
the Figure 8 configuration, or, if good current-limit
accuracy is desired, use the optional current-sense
configuration in Figure 10 to increase the amplitude of
If the 2.2μH inductor used in the typical operating cir-
cuit (Figures 1 and 2) has a typical DCR of 45m ? and a
maximum DCR of 56m ? , the RC time constant of the
sense network is:
R S 3 =
τ =
= 48 . 9 μ s
the sense signal. Calculate R S3 and R S4 :
V MAIN - V IN ( MIN )
V MAIN - V IN ( MIN ) - 100 mV + V SENSE
× R S
2.2 μ H
45 m ?
Select C S = 0.1μF and calculate R S :
R S =
= 489 ?
R S 4 = R S - R S 3
If the 2.2μH inductor used in the typical operating cir-
cuit (Figures 1 and 2) had a typical DCR of 24m ? and a
maximum DCR of 30m ? , the RC time constant of the
sense network would be:
L
48.9 μ s
0 . 1 μ F
Assuming ? T is 40 ° C and TC is 0.5%, the worst-case
high sense voltage over temperature is:
L
V IN
C S
R S
V MAIN
V IN
R S2
R S1
V MAIN
C S
C S+
C S-
GATE
C S+
C S-
MAX1513
MAX1514
GND
FB
MAX1513
MAX1514
GATE
GND
FB
Figure 8. Lossless Current Sensing with 80mV < V SENSE < 100mV
Figure 9. Lossless Current Sensing with V SENSE > 100mV
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| MAX1514ETP+T | 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 |
| MAX1514ETP-T | 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 |
| MAX1515ETG | 功能描述:直流/直流开关调节器 RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
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