产品详情资料
通过RISET在ISET引脚上,内部5µA电流源设置峰值电流。可使用图2或以下公式计算电阻器的值,以获得大平均输出电流:RISET=I OUT(MAX)•1kΩ 2mA,其中100mA<IOUT(大值)<405mA。该方程给出了使用小峰值和谷值电流提供的大负载电流。对于电感器选择,给定RISET电阻值的大峰值电流可近似为:I peak(MAX)≈RISET•3.3mA 1kΩ +30mA峰值电流内部限制在140mA至540mA的范围内。将ISET引脚短接至地将电流限制编程为140mA(100mA平均输出电流),并将其保持浮动,将电流限制设置为大值540mA(405mA平均输出电流。内部5µA电流源在休眠模式下降低到1µA,以大化效率,并促进效率和轻负载输出电压纹波之间的权衡,如优化输出电压纹波部分所述。电感器选择对于LTC7138,它具有相对较低的输出电流和非常高的输入电压,开关损耗通常主导功率损耗方程。对于这种结构,较高的电感器值降低了开关on the ISET pin by RISET and the internal 5µA current source sets the peak current. The value of resistor to achieve a maximum average output current can be computed by using Figure 2 or the following equation: RISET =I OUT(MAX) • 1kΩ 2mA where 100mA < IOUT(MAX) < 405mA. This equation gives the maximum load current supplied using the minimum peak and valley current. For inductor selection, the maximum peak current can then be approximated for a given RISET resistor value as: I PEAK(MAX) ≈RISET • 3.3mA 1kΩ +30mA The peak current is internally limited to be within the range of 140mA to 540mA. Shorting the ISET pin to ground programs the current limit to 140mA (100mA average output current), and leaving it floating sets the current limit to the maximum value of 540mA (405mA average output current). The internal 5µA current source is reduced to 1µA in sleep mode to maximize efficiency and to facilitate a trade-off between efficiency and light load output voltage ripple, as described in the Optimizing Output Voltage Ripple section. Inductor Selection For the LTC7138, which has relatively low output current and very high input voltage, switching losses typically dominate the power loss equation. For this architecture, higher inductor values lower the switching erated
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●使用前:
在操作和维护,安装设备之前,请阅读并严格遵守安全相关的信息。
Read and strictly follow safety-related information before operatingmaintainingand installing equipment.
●使用者要求:
必须从事安装,组装或维护设备等相关工控电气机械以及其他相关技术的人员。
Must be engaged in the installation,assembly or maintenance of equipment and other related industriacontroeectrica machinery and other related technica personne.应用范围:
应用于品牌本系列工业以及生产生活自动化设备产品。
Used in the brand of this series of industriaand production automation eauipment products
适用于场景:系统集成,非标定制,产线升级改造,原设备电气替换等等。
Suitable for scenarios:system integration,non-standard customizationproduction line upgrading and transformation,electrical replacement of original equipment,etc.
●操作人员:
应该由本品牌专业培训操作员来安装、操作和维修设备。专业人员具有技术能力强,熟悉安全信息和安全实施:
熟悉设备的安装加工、操作和维护:熟悉处理所有的潜在危险情况。
Equipment should be installed,operated and maintained by trained operators from the brand
●危险情况
警告
.请注意使用人员的人身安全。
●除了产品特性以及功能,还需了解产品的使用寿命环境。
●充分学习产品使用手册,否则非专业人员可能会造成人身危险。
Study the product instruction manual thoroughlyotherwise it may cause personal danger to non-professionals.
●服务行业
适用水泥,木业,石业,橡胶,石油,化工,发电,环保,水处理,制冷,交通,钢铁,食品,饮料,船舶,制冷等行业
Applicable to cementwood,stone,rubber,petroleumchemical, power generation,
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