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LM5041A-级联 PWM 控制器
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TI产品 - LM5041A介绍

LM5041A - 级联 PWM 控制器

LM5041A是TI德州仪器公司的一款PWM与谐振控制器产品，LM5041A是级联 PWM 控制器，本站介绍了LM5041A的封装应用图解、特点和优点、功能等，并给出了与LM5041A相关的TI元器件型号供参考。

LM5041A - 级联 PWM 控制器 - PWM与谐振控制器 - 离线隔离型DC/DC控制器和转换器 - 德州仪器

产品描述

The LM5041A PWM controller contains all of the features necessary to implement either current-fed or voltage-fed push-pull or bridge power converters. These “Cascaded” topologies are well suited for multiple output and higher power applications. The LM5041A’s four control outputs include: the buck stage controls (HD and LD) and the push-pull control outputs (PUSH and PULL). Push-pull outputs are driven at 50% nominal duty cycle at one half of the switching frequency of the buck stage and can be configured for either an overlap time (for current-fed applications) or a both-off time (for voltage-fed applications). Push-pull stage MOSFETs can be driven directly from the internal gate drivers while the buck stage requires an external driver such as the LM5102. The LM5041A includes a high-voltage start-up regulator that operates over a wide input range of 15V to 100V. The PWM controller is designed for high-speed capability including an oscillator frequency range up to 1 MHz and total propagation delays of less than 100ns. Additional features include: line Under-Voltage Lockout (UVLO), soft-start, an error amplifier, precision voltage reference, and thermal shutdown.

The two differences between the LM5041 and the LM5041A are: No second level current limit in the 'A' version No softstart (SS) shutdown comparator in the 'A' version.

产品特性

  • Internal Start-up Bias Regulator
  • Programmable Line Under-Voltage Lockout (UVLO) with Adjustable Hysteresis
  • Current Mode Control
  • Internal Error Amplifier with Reference
  • Cycle-by-cycle Over-Current Protection
  • Leading Edge Blanking
  • Programmable Push-Pull Overlap or Dead Time
  • Internal 1.5A Push-Pull Gate Drivers
  • Programmable Soft-Start
  • Programmable Oscillator with Sync Capability
  • Precision Reference
  • Thermal Shutdown

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