STEVAL-A6983IV1

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面向隔离应用的38 V、10 W同步iso-buck转换器

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STEVAL-A6983IV1评估板基于A6983I（38 V、10 W同步iso-buck转换器），专为隔离应用而设计。

能够精确调节初级输出电压，而隔离的次级输出电压则通过给定的变压比生成。无需光耦合器。

初级受电能力可达-4.5 A（即使在软启动期间），允许适当的能量转移到次级侧，并实现可跟踪的次级输出软启动。

控制回路基于峰值电流模式架构，器件在强制PWM模式下工作。

390 ns的消隐时间能够有效滤除由变压器漏感引起的振荡，使解决方案更加稳定可靠。

A6983I采用紧凑型QFN-16 3 x 3 mm封装，带内部补偿功能，从而使设计复杂性和尺寸降至最低。

开关频率可在200 kHz至1 MHz范围内设置，同时能够以可选展频来改善EMC。

EN引脚提供使能/禁止功能。禁止之后，典型的关断电流是2 µA。当EN引脚上拉时，器件启用并会执行时长为1.3 ms的内部软启动。

A6983I采用“电源正常”的开路集电极，以监测FB电压。两个功率元件上的逐脉冲电流检测能够实现有效的恒定电流保护和热关断，从而防止出现热耗散。

由于初级反向电流限制，次级输出受到保护以防止出现短路。

  • 所有功能

    • 专为iso-buck拓扑而设计
    • 输入电压范围：4 V至38 V
    • 输出功率最高可达10 W（具体取决于应用条件）
    • 提供非稳压隔离输出电压
    • 可选的后级稳压（未安装，布局已在底部预留）
    • 集成变压器
    • 在初级侧调节电压，无需光耦合器
    • 开关频率可在200 kHz至1 MHz范围内设定
    • 支持外部同步
    • 提供“电源正常”信号
    • 使能
    • 集成输入EMI滤波器
    • 可选展频功能，优化EMC性能

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The current status of a product:
Active: Product is in volume production
Evaluation: Product is under characterization. Limited Engineering samples available
Preview: Product is in design stage
Target: Product is in design feasibility stage.No commitment taken to produce
Proposal: Marketing proposal for customer feedback.No commitment taken to design or produce
NRND: Not Recommended for New Design.Product is in volume production only to support customers ongoing production.Marketing description of the package type.Compliancy of the device with industry requirement domains (IRD)The RoHS status of a product:
ECOPACK 1: Initial grade to identify European RoHS compliant products.
ECOPACK 2: New grade to identify brominated chlorinated and antimony oxide flame retardant free products.
ECOPACK 3: Halogen free RoHS exemptions free products.
(*): ECOPACK 2 version available upon request.
(**): Some versions still existing in ECOPACK 1 or not compliant.Compliancy with WEEE Directive (2012/19/EU)The current status of a product:
Active: Product is in volume production
Evaluation: Product is under characterization. Limited Engineering samples available
Preview: Product is in design stage
Target: Product is in design feasibility stage.No commitment taken to produce
Proposal: Marketing proposal for customer feedback.No commitment taken to design or produce
NRND: Not Recommended for New Design.Product is in volume production only to support customers ongoing production.Budgetary PriceMain country of assembly or fabrication of the product.ECCNs are five character alpha-numeric designations used on the Commerce Control List to identify dual-use items for export control purposes. ECCNs are five character alpha-numeric designations used on the Commerce Control List to identify dual-use items for export control purposes.