Infineon IR21834STRPBF: High- and Low-Side Driver IC for Power MOSFETs and IGBTs

In the realm of power electronics, the efficient and reliable control of power switches like MOSFETs and IGBTs is paramount. The Infineon IR21834STRPBF stands out as a specialized high-voltage, high-speed power MOSFET and IGBT driver, engineered to control both the high-side and low-side switches in a half-bridge configuration. This integrated circuit (IC) is a cornerstone in applications ranging from motor drives and switch-mode power supplies (SMPS) to industrial inverters, thanks to its robust design and advanced features.

A key strength of the IR21834STRPBF is its high level of integration. It incorporates a high-voltage level-shifter that allows the high-side driver circuitry to operate hundreds of volts above ground, seamlessly translating logic-level inputs from a microcontroller into the high-voltage signals needed to control the upper switch in the bridge. This eliminates the need for complex and discrete bootstrap components, simplifying board design and enhancing overall system reliability.

The driver is designed for exceptional noise immunity, a critical attribute in high-power, fast-switching environments where voltage spikes and transients are common. Its robust design ensures stable operation and protects the power switches from dangerous cross-conduction (shoot-through) by providing matched and programmable dead time. This built-in feature prevents both the high-side and low-side switches from being on simultaneously, which could lead to catastrophic failure.

Furthermore, the IR21834STRPBF offers high output drive current capable of sourcing and sinking significant current (typically up to 1.4A and 1.8A, respectively). This enables very fast turn-on and turn-off times for the power switches, minimizing switching losses and improving the overall efficiency of the power conversion system. The IC also includes comprehensive protection features such as undervoltage lockout (UVLO) for both the high-side and low-side sections, safeguarding the system during power-up and power-down sequences by keeping the outputs disabled until a sufficient supply voltage is present.

Housed in a compact yet thermally efficient SOIC-8 package, the IR21834STRPBF represents a perfect blend of performance, protection, and integration for modern power electronic designs.

ICGOODFIND: The Infineon IR21834STRPBF is a highly integrated, robust, and reliable half-bridge driver IC. Its advanced features like high noise immunity, programmable dead time, and strong drive current make it an exceptional choice for designers seeking to optimize the performance and safety of motor control, inverter, and power supply systems.

Keywords: Half-Bridge Driver, High-Noise-Immunity, Programmable Dead Time, Undervoltage Lockout (UVLO), Level Shifter