IRS21531DPBF

Gate Driver Overview

The IRS21531DPBF is a self-oscillating half-bridge gate driver IC manufactured by Infineon Technologies. It integrates two drivers for high-side and low-side N-channel MOSFETs in an 8-pin DIP package. The device supports a supply voltage range of 10.1 V to 16.8 V with a typical operating current of 5 mA. Peak output currents are specified at 260 mA source and 180 mA sink. Switching characteristics include a rise time of 120 ns and a fall time of 50 ns. It operates within a temperature range of -40°C to +125°C and features synchronous operation with CMOS logic compatibility.

Gate Driver Feature Summary

• Integrates self-oscillating half-bridge topology for simplified control circuitry
• Provides dedicated high-side and low-side outputs for N-channel power devices
• Features synchronous operation with standard CMOS logic input compatibility

Gate Driver Applications

• Self-oscillating resonant converter topologies
• Lighting applications requiring integrated half-bridge driving
• Power management systems utilizing N-channel MOSFET switching

Gate Driver Procurement Notes

Verify component status prior to procurement as the manufacturer has indicated this part is scheduled for obsolescence and will be discontinued. Confirm availability through authorized distributors, noting that stock may be limited or subject to end-of-life constraints. Ensure design-in decisions account for potential supply chain restrictions associated with legacy components.

Gate Driver Selection Notes

Select this component for designs requiring a self-oscillating half-bridge solution without external timing control. The DIP-8 package suits through-hole mounting requirements. Verify that the 10.1 V to 16.8 V supply range aligns with system power rails. Consider the 120 ns rise time and 50 ns fall time for switching frequency limitations. Ensure thermal management accommodates the 1 W power dissipation capability.

Gate Driver Part Context

The IRS21531DPBF belongs to the IRS21531 series of self-oscillating gate drivers. It is functionally related to the IR21531 but offers specific packaging and parameter variations. This series targets applications where internal oscillation simplifies the control loop. The DIP-8 variant provides a through-hole alternative to surface-mount options like the SOIC packages found in the same product family.

Gate Driver Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Due to the obsolescence status, direct pin-to-pin replacements should be verified against official Infineon cross-reference lists. Designers should evaluate newer generations of half-bridge drivers for long-term supply stability.