TC-303-01-2M0可编程控制器PLC模块ICS TRIPLEX

产品详情资料

电流比较器阈值或VFB引脚上的电压超过800mV，此时开关断开，电感器电流由外部捕获二极管携带。然后通过ANODE引脚感测到的电感器电流逐渐下降，直到电流低于谷电流比较器阈值。如果VFB引脚上的电压仍然小于800mV参考电压，则电源开关再次打开，另一个周期开始。脉冲串周期期间的平均电流通常大于平均负载电流。对于这种结构，大平均输出电流等于峰值电流的75%。这种控制结构的滞后特性导致开关频率，该开关频率是输入电压、输出电压和电感器值的函数。这种行为提供了固有的短路保护。如果输出对地短路，在单个开关周期内，电感器电流将非常缓慢地衰减。由于高压侧开关仅在电感器电流低于谷电流跳闸阈值时开启，因此LTC7138在启动或短路条件下固有地以较低频率切换。突发频率电感器电流输出电压∆VOUT 7138 F01突发周期睡眠周期开关频率current comparator threshold or the voltage on the VFB pin exceeds 800mV, at which time the switch is turned off and the inductor current is carried by the external catch diode. The inductor current, then sensed through the ANODE pin, ramps down until the current falls below the valley current comparator threshold. If the voltage on the VFB pin is still less than the 800mV reference, the power switch is turned on again and another cycle commences. The average current during a burst cycle will normally be greater than the average load current. For this architecture, the maximum average output current is equal to 75% of the peak current. The hysteretic nature of this control architecture results in a switching frequency that is a function of the input voltage, output voltage, and inductor value. This behavior provides inherent short-circuit protection. If the output is shorted to ground, the inductor current will decay very slowly during a single switching cycle. Since the high side switch turns on only when the inductor current is below the valley current trip threshold, the LTC7138 inherently switches at a lower frequency during start-up or shortcircuit conditions. BURST FREQUENCY INDUCTOR CURRENT OUTPUT VOLTAGE ∆VOUT 7138 F01 BURST CYCLE SLEEP CYCLE SWITCHING FREQUENC

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主营产品简介
专注于DCS、PLC、机器人控制系统、大型伺服四大系统领域。

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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,