Product overview
概要
The STEVAL-A6983IV1 is an evaluation board based on the A6983I, 38 V, 10 W synchronous iso-buck converter designed for isolated applications.
The primary output voltage can be accurately adjusted, whereas the isolated secondary output is derived by using a given transformer ratio. No optocoupler is required.
The primary sink capability up to -4.5 A (even during soft-start) allows a proper energy transfer to the secondary side as well as enables 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 390 ns blanking time filters oscillations, generated by the transformer leakage inductance, making the solution more robust.
The compact QFN-16 3x3 mm package and the internal compensation of the A6983I help minimizing design complexity and size.
The switching frequency can be programmed in the 200 kHz - 1 MHz range with optional spread spectrum for improved EMC.
The EN pin provides enable/disable functionality. The typical shutdown current is 2 uA when disabled. As soon as the EN pin is pulled up, the device is enabled and the internal 1.3 ms soft start takes place.
The A6983I features a power-good open collector that monitors the FB voltage. Pulse by pulse current sensing on both power elements implements an effective constant current protection and thermal shutdown prevents thermal runaway.
Due to the primary reverse current limit, the secondary output is protected against short-circuit events.
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All features
- Designed for iso-buck topology
- 4 to 38 V input voltage range
- Up to 10 W deliverable power (depending on the application conditions)
- Isolated output voltage unregulated
- Optional postregulation (not mounted, layout foreseen at the bottom)
- Embeds the transformer
- Regulation at the primary side, no optocoupler required
- 200 kHz to 1 MHz programmable switching frequency
- Suitable for external synchronization
- Power-good signal available
- Enable
- Input EMI filter embedded
- Selectable spread spectrum function for improved EMC performance
推奨コンテンツ
すべてのリソース
| Resource title | Version | Latest update | Actions | Details | ダウンロード |
|---|
Board Manufacturing Specifications (1)
| Resource title | Version | Latest update | Actions | Options | ||
|---|---|---|---|---|---|---|
| ZIP | 1.0 | 14 Feb 2025 | 14 Feb 2025 |
BOM (1)
| Resource title | Version | Latest update | Actions | Options | ||
|---|---|---|---|---|---|---|
| 1.0 | 14 Feb 2025 | 14 Feb 2025 |
Schematic Pack (1)
| Resource title | Version | Latest update | Actions | Options | ||
|---|---|---|---|---|---|---|
| 1.0 | 14 Feb 2025 | 14 Feb 2025 |
Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHSコンプライアンスグレード | WEEE Compliant | Longevity Commitment | Longevity Starting Date | Material Declaration** |
|---|---|---|---|---|---|---|---|---|
| STEVAL-A6983IV1 | Active 交換品交換品 | CARD | Industrial | Ecopack2 | Yes | - | - | |
STEVAL-A6983IV1
Package:
CARDMaterial Declaration**:
(**) st.comで提供している材料宣誓書は、パッケージ･ファミリ内で最も一般的に使用されているパッケージに基づく汎用ドキュメントの場合があります。そのため、特定の製品では100%正確ではない可能性があります。特定の製品情報については、セールスサポートまでお問い合わせください
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Sample & Buy
| Part Number | 製品ステータス | Budgetary Price (US$)*/Qty | STから購入 | Order from distributors | Package | Packing Type | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | Supplier | Core Product | Board production status | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| STEVAL-A6983IV1 | | | distributors 販売代理店に在庫がない場合は、STのセールス･オフィスまでお問い合わせください |
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STEVAL-A6983IV1 Active
販売代理店に在庫がない場合は、STのセールス･オフィスまでお問い合わせください
（*）概算用の参考価格（US$）です。現地通貨でのお見積りについては、STのセールス･オフィスまたは販売代理店までお問い合わせください。