UC2907 - 负载均分控制器

UC2907是TI德州仪器公司的一款负载均分产品，UC2907是负载均分控制器，本站介绍了UC2907的封装应用图解、特点和优点、功能等，并给出了与UC2907相关的TI元器件型号供参考。

UC2907 - 负载均分控制器 - 负载均分 - 离线隔离型DC/DC控制器和转换器 - 德州仪器

产品描述

The UCx907 family of load share controller ICs provides all the necessary features to allow multiple-independent-power modules to be paralleled such that each module supplies only its proportionate share to total-load current.

This sharing is accomplished by controlling each module’s power stage with a command generated from a voltage-feedback amplifier whose reference can be independently adjusted in response to a common-share-bus voltage. By monitoring the current from each module, the current share bus circuitry determines which paralleled module would normally have the highest output current and, with the designation of this unit as the master, adjusts all the other modules to increase their output current to within 2.5% of that of the master.

The current share bus signal interconnecting all the paralleled modules is a low-impedance, noise-insensitive line which will not interfere with allowing each module to act independently should the bus become open or shorted to ground. The UC3907 controller will reside on the output side of each power module and its overall function is to supply a voltage feedback loop. The specific architecture of the power stage is unimportant. Either switching or linear designs may be utilized and the control signal may be either directly coupled or isolated though the use of an optocoupler or other isolated medium.

Other features of the UC3907 include 1.25% accurate reference: a low-loss, fixed-gain current-sense amplifier, a fully differential, high-impedance voltage sensing capability, and a status indicator to designate which module is performing as master.

产品特性

Fully Differential High Impedance Voltage Sensing
Accurate Current Amplifier for Precise Current Sharing
Opto Coupler Driving Capability
1.25% Trimmed Reference
Master Status Indication
4.5-V to 35-V Operation

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