参数资料
| 型号： | ISL6421ERZ |
| 厂商： | Intersil |
| 文件页数： | 8/18页 |
| 文件大小： | 0K |
| 描述： | IC REG SGL LNB CONTROL 32-QFN |
| 标准包装： | 60 |
| 应用： | 转换器，卫星信号接收机顶盒设计 |
| 输入电压： | 8 V ~ 14 V |
| 输出数： | 1 |
| 输出电压： | 13 V ~ 18 V |
| 工作温度： | -20°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-VFQFN 裸露焊盘 |
| 供应商设备封装： | 32-QFN（5x5） |
| 包装： | 管件 |
Application Note 1083
ISL6421/ISL6425. At the maximum rated output current, the
voltage drop on the linear regulator leads to a total
dissipated power that is about 1.2V*750mA = 0.9W. At
350mA maximum current, this power will be 1.2V*350mA =
0.42W. The heat needs to be removed with a heatsink to
keep the junction temperature below the over-temperature
threshold.
The simplest solution is to use a large, continuous copper
area of the ground layer to dissipate the heat. This area can
be the inner ground of multi-layered pcbs, or in a dual layer
pcb, an unbroken ground area on the opposite side of the
board where the IC is placed. In both cases, the thermal path
between the IC ground pins and the dissipating copper area
must exhibit a low thermal resistance.
8
Conclusion
The ISL6421/ISL6425 voltage regulator makes an ideal
choice for advanced satellite set-top box and personal video
recorder applications. The ISL6421EVAL1A/ISL6425EVAL2
is a complete reference design for providing power and
control functions to the LNB in advanced satellite set-top box
applications.
References
Intersil documents are available on the web at
http://www.intersil.com.
[1] ISL6421 Datasheet , Intersil Corporation, File No.
FN9031
[2] ISL6425 Datasheet , Intersil Corporation, File No.
FN9176
[3] DiSEqC Bus Functional Specification , EUTELSAT
http://www.eutelsat.com/docs/diseqc
[4] More information on the USB-I2CIO PC to I 2 C interface
board available at http://www.DeVaSys.com
AN1083.1
May 6, 2005
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| ISL6421ERZ-T | 功能描述:电流型 PWM 控制器 SINGLE LNBP SUPPLY CONTROL VG 32LD MLFP RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| ISL6421EVAL1 | 功能描述:EVALUATION BOARD 1 ISL6421 RoHS:否 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:True Shutdown™ 主要目的:DC/DC，步升 输出及类型:1，非隔离 功率 - 输出:- 输出电压:- 电流 - 输出:1A 输入电压:2.5 V ~ 5.5 V 稳压器拓扑结构:升压 频率 - 开关:3MHz 板类型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| ISL6422BERZ | 功能描述:直流/直流开关转换器 DL LNB SUPPLY + CONT VAGEG W/I2C RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| ISL6422BERZ-T | 功能描述:直流/直流开关转换器 DL LNB SUPPLY + CONT VAGEG W/I2C RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| ISL6422BEVEZ | 功能描述:直流/直流开关转换器 DL LNB SUPPLY + CONT VAGEG W/I2C RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
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