Product overview
Description
The STEVAL-A6986IV1 evaluation board is based on ST A6986I automotive 38 V, 5 W synchronous iso-buck converter for isolated applications.
The primary output voltage can be accurately adjusted, whereas the isolated secondary output is generated by a transformer. No optocoupler is required.
The primary sink capability (typ. 1.9 A) allows a proper energy transfer to the secondary side and 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 300 ns blanking time filters oscillations generated by the transformer leakage inductance and makes the solution more robust.
Pulse by pulse current sensing on both power elements implements an effective constant current protection on the primary side. Due to the primary reverse current limit, the secondary output is protected against short-circuit events. The secondary voltage is stabilized over current by using a power transistor and a shunt voltage reference (TL431).
The evaluation board generates two isolated voltages (positive around 18 V and negative between 4 V and 5 V), especially suitable for supplying IGBT/SiC MOSFET gate driver. A simple bypass enables the supply of a single isolated voltage.
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All features
- AEC-Q100 qualified
- Operating temperature range: -40 °C to 135 °C for Tj
- 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
All resources
| Resource title | Version | Latest update | Actions | Details | Download |
|---|
SIMPLIS models (1)
| Resource title | Version | Latest update | Actions | Options | ||
|---|---|---|---|---|---|---|
| ZIP | 2023.10 | 04 Mar 2025 | 04 Mar 2025 |
Board Manufacturing Specifications (1)
| Resource title | Version | Latest update | Actions | Options | ||
|---|---|---|---|---|---|---|
| ZIP | 1.0 | 07 Apr 2021 | 07 Apr 2021 |
Bill of Materials (1)
| Resource title | Version | Latest update | Actions | Options | ||
|---|---|---|---|---|---|---|
| 1.0 | 07 Apr 2021 | 07 Apr 2021 |
Schematic Pack (1)
| Resource title | Version | Latest update | Actions | Options | ||
|---|---|---|---|---|---|---|
| 1.0 | 07 Apr 2021 | 07 Apr 2021 |
Quality and Reliability
| Part Number | Marketing Status | RoHS Compliance Grade | WEEE Compliant | Longevity Commitment | Longevity Starting Date | Material Declaration** |
|---|---|---|---|---|---|---|
| STEVAL-A6986IV1 | Active Product is in volume production. | Ecopack2 | Yes | - | - | |
STEVAL-A6986IV1
Package:
Ecopack2Material Declaration**:
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
Sample & Buy
| Budgetary Price (US$)*/Qty | Supplier | Core Product | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| STEVAL-A6986IV1 | 2 distributors | Active | ITALY | EAR99 | NEC | | ST | A6986I |
Buy Direct at ST (*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors