Wednesday, April 24, 2024

Single-Channel Gate-Driver IC Family With Integrated Galvanic Isolation

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Available in a small 150 mil 8-pin DSO package, the robust IC family improves power density and addresses fast-switching requirements

Infineon Technologies AG has expanded its portfolio of single-channel gate-driver ICs with the addition of the new EiceDRIVER 1EDB family of single-channel gate-driver IC that provides galvanic input-to-output isolation of 3 kVrms (UL 1577), ensuring rugged ground-loop separation. The common-mode transient immunity (CMTI) exceeds 300 V/ns, making these devices the perfect choice for hard switching applications enabling numerous topologies.

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The IC family is optimised for both high/low-side applications and can solve PCB-layout problems, common in high-power applications such as server and telecom switched-mode power supplies (SMPS), as well as, uninterruptable power supply (UPS) systems. 

Due to increased power-density need, EV-charging designs often require fast-switching power MOSFETs. Photovoltaic inverters take advantage of silicon carbide MOSFETs as they enable both lower switching losses and significantly improve power density. The new 1EDB family addresses all these applications, ensuring high system efficiency and robust, safe system operation.

Designers can choose between four different output under-voltage lockout (UVLO) options:

  • 4.0 V for logic-level MOSFETs (1EDB7275F)
  • 7.0 V for normal-level MOSFETs (1EDB8275F)
  • 12 V for CoolSiC™ MOSFETs 650 V (15 V driving scheme, 1EDB6275F)
  • 14 V for CoolSiC™ MOSFETs 650 V (≥18 V driving scheme, 1EDB9275F)

All products come with separate and very low ohmic (0.95 Ω) source and (0.48 Ω) sink outputs for ease of design, offering typical drive strengths of 5.4 Apeak source and 9.8 Apeak sink. This feature plays a vital role in reducing the switching losses of power MOSFETs. The input-to-output propagation delay accuracy is +/- 4 ns helping to cut switching losses, which is essential in fast-switching applications. The typical output stage clamping speed is as short as 20 ns and supports functionally safe system operation, especially during start-up.

EiceDRIVERs 1EDB7275F and 1EDB8275F are available in 150 mil 8-pin DSO packages and can be ordered now. 1EDB6275F and 1EDB9275F will be made soon available. 


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