产品概述
描述
The STEVAL-L6986IV1 evaluation board is based on L6986I 38 V, 5 W synchronous step-down switching regulator designed for isolated buck topology.
The primary output voltage can be accurately adjusted, whereas the isolated secondary output is generated by using a transformer. No optocoupler is required.
The primary sink capability (typ. 1.9 A) allows proper energy transfer to the secondary side as well as a tracked soft-start of the secondary output. The control loop is based on a peak current mode architecture and the device operates in forced PWM.
The 300 ns blanking time filters oscillations generated by the transformer leakage inductance, making the solution more robust. Pulse by pulse current sensing on both power elements implements an effective constant current protection on the primary side. Thanks to the primary reverse current limit, the secondary output is protected against short-circuit.
The secondary voltage is stabilized over current by using a power transistor and a shunt voltage reference (TL431AIL3T).
The STEVAL-L6986IV1 evaluation board generates two isolated voltages (positive around 18 V and negative between 4 and 5 V), particularly suitable for supplying the IGBT/SiC MOSFET gate driver for multiple applications. A simple by-pass enables the supply of a single isolated voltage.
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所有功能
- Designed for iso-buck topology
- 4 to 38 V operating input voltage
- Primary output voltage regulation/no optocoupler required
- 1.9 A typical sink peak primary current capability
- Peak current mode architecture in forced PWM operation
- 300 ns blanking time
- 8 µA IQ-SHTDWN
- Adjustable fSW and synchronization
- Embedded primary output voltage supervisor
- Adjustable soft-start time
- Internal primary current limiting
- Overvoltage protection
- RDS(on) HS = 180 mΩ, RDS(on) LS = 150 mΩ
- Thermal shutdown
精选 视频
所有资源
| 资源标题 | 版本 | 更新时间 |
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SIMPLIS models (1)
| 资源标题 | 版本 | 更新时间 | ||
|---|---|---|---|---|
| ZIP | 2023.10 | 04 Mar 2025 | 04 Mar 2025 |
MCSDK Board Description (1)
| 资源标题 | 版本 | 更新时间 | ||
|---|---|---|---|---|
| ZIP | 1.0 | 20 Jul 2021 | 20 Jul 2021 |
物料清单 (1)
| 资源标题 | 版本 | 更新时间 | ||
|---|---|---|---|---|
| 1.0 | 20 Jul 2021 | 20 Jul 2021 |
Schematic Pack (1)
| 资源标题 | 版本 | 更新时间 | ||
|---|---|---|---|---|
| 1.0 | 20 Jul 2021 | 20 Jul 2021 |
质量与可靠性
| 产品型号 | Marketing Status | 包 | 等级规格 | 符合RoHS级别 | WEEE Compliant | Longevity Commitment | Longevity Starting Date | 材料声明** |
|---|---|---|---|---|---|---|---|---|
| STEVAL-L6986IV1 | 批量生产 | CARD | 工业 | Ecopack2 | Yes | - | - | |
STEVAL-L6986IV1
Package:
CARDMaterial Declaration**:
(**) st.com上提供的材料声明表单可能是基于包装系列中最常用的封装的通用文档。因此，它们可能不是100%适用于特定的设备。有关特定设备的信息，请联系 销售支持。
样片和购买
| 产品型号 | 供货状态 | Budgetary Price (US$)*/Qty | 从ST订购 | Order from distributors | 包 | 包装类型 | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | 供应商 | 核心产品 | Board production status | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| STEVAL-L6986IV1 | | | distributors 无法联系到经销商，请联系我们的销售办事处 |
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STEVAL-L6986IV1 批量生产