FOD3125SD

Isolators - Gate Drivers Overview

The onsemi FOD3125SD is a high-temperature, dual-channel logic output optocoupler designed for gate drive applications. It features a push-pull output stage capable of delivering up to 2.5A continuous output current. The device provides 5000Vrms isolation voltage and operates within a temperature range of -40°C to 125°C. Key electrical parameters include a typical rise and fall time of 60ns, a maximum propagation delay of 400ns, and a forward voltage of 1.5V at 10mA input current. It is housed in an SMD-8 package.

Isolators - Gate Drivers Feature Summary

• Dual-channel architecture with push-pull output configuration for enhanced drive capability
• High thermal performance rated for operation up to 125°C junction temperature
• Integrated under-voltage lockout protection for reliable switching
• High isolation voltage rating of 5000Vrms for safety-critical applications

Isolators - Gate Drivers Applications

• Gate drive circuits for IGBTs and MOSFETs
• Industrial motor control systems
• Power supply feedback loops requiring high isolation

Isolators - Gate Drivers Procurement Notes

Verify the specific suffix 'SD' indicates the surface-mount SMD-8 package variant, distinct from the through-hole DIP versions. Confirm the datasheet revision matches the required isolation standards such as UL1577 or IEC60747-5-5. Ensure the order quantity aligns with the manufacturer's standard tape and reel packaging specifications to avoid handling discrepancies.

Isolators - Gate Drivers Selection Notes

Select this component when dual-channel isolation is required for synchronous rectification or half-bridge driving. The 2.5A output current supports direct driving of medium-power switches without external buffers. Consider the 60ns switching speed for applications requiring moderate frequency operation. The wide operating temperature range makes it suitable for harsh industrial environments where thermal management is challenging.

Isolators - Gate Drivers Part Context

The FOD3125SD belongs to onsemi's FOD series of high-speed optocouplers. It complements single-channel variants like the FOD3120 by providing two isolated channels in one package. This integration reduces board space and simplifies layout for bridge configurations. The series is engineered for robust performance in noisy power electronics environments.

Isolators - Gate Drivers Replacement Considerations

Check for pin-compatible alternatives within the same FOD family, such as the FOD3120SD for single-channel needs. Verify that any substitute maintains the 2.5A output current and 5000Vrms isolation rating. Ensure the replacement part supports the same SMD-8 package and high-temperature operational limits.