International Test Instruments Corporation IRS21094PBF

Overview

IRS21094PBF from Infineon Technologies is a high-voltage, high-speed half-bridge gate driver IC designed for N-channel MOSFETs and IGBTs in motor control, power inverters, and SMPS. It features independent high-side (up to +600 V) and low-side channels, 120 mA/250 mA peak output drive, 750 ns/200 ns typical propagation delays, and programmable deadtime (540 ns base, up to 5 µs via R_DT). It operates with 10–20 V gate supply and supports 3.3 V/5 V/15 V logic inputs.

For engineers reviewing the IRS21094PBF datasheet, IRS21094PBF pinout, IRS21094PBF application, or IRS21094PBF equivalent, key selection criteria include floating channel voltage tolerance (+600 V), matched HS/LS propagation delay (<70 ns mismatch), programmable deadtime capability, UVLO thresholds (8.2–9.8 V), and SOIC-14 or PDIP-14 package compatibility.

Technical Context

The IRS21094PBF integrates a high-voltage level shifter and latch-immune CMOS logic to enable robust bootstrap-based high-side operation. Its floating channel supports VS referenced from –5 V to +600 V, with dV/dt immunity up to 50 V/ns in PDIP-8 and full logic retention across that range.

It implements cross-conduction prevention via internal logic and fixed 540 ns deadtime, extendable to 5 µs using an external resistor on the DT pin. The VSS pin provides dedicated logic ground isolation, enabling precise timing control in noisy high-side switching environments.

Key Specifications

Pinout & Package

IRS21094PBF is available in 14-lead SOIC and 14-lead PDIP packages. Both feature gull-wing leads, surface-mount or through-hole mounting options, and thermal pad-compatible layouts per Infineon's PD60261 datasheet.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar half-bridge gate driver applications.

Compared with IRS21094PBF, IRS21844PBF offers greater drive strength but sacrifices logic ground isolation, while UCC27211D delivers ultra-fast switching at the cost of deadtime configurability - making IRS21094PBF optimal for noise-sensitive, variable-frequency industrial motor control.

Availability

IRS21094PBF is available at Aetrix Electronics and suitable for industrial motor drives, photovoltaic inverters, and server power supplies requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for IRS21094PBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive microcontrollers, and high-voltage analog ICs, with global manufacturing and quality certification to ISO 9001 and IATF 16949.

The IRS21094 belongs to Infineon's high-voltage gate driver product line, engineered specifically for robust, noise-immune half-bridge control in industrial motor drives, UPS systems, and renewable energy inverters.

FAQ

What is the purpose of the VSS pin on IRS21094PBF?

VSS serves as the dedicated logic ground reference for IN, SD, and DT pins - electrically isolated from COM to prevent noise coupling from the power ground into timing-critical control signals. This separation improves propagation delay stability under high dV/dt conditions and enables cleaner PWM edge integrity in noisy inverter environments.

Can IRS21094PBF drive SiC MOSFETs?

Yes, IRS21094PBF can drive SiC MOSFETs provided gate drive requirements fall within its 120 mA/250 mA output capability and 10–20 V supply range. However, due to SiC's faster switching and lower gate charge, careful PCB layout, minimized trace inductance, and gate resistor tuning are essential - the device does not include active Miller clamp or negative turn-off features.

How is deadtime programmed on IRS21094PBF?

Deadtime is set by connecting a single resistor (R_DT) between the DT pin and VSS. With R_DT = 0 Ω, deadtime is 540 ns; increasing R_DT to 200 kΩ extends it to 5 µs. The relationship is linear per Figure 4 in PD60261, and R_DT must be placed close to the DT pin with short traces to avoid noise pickup.

Does IRS21094PBF require external bootstrap diodes?

Yes - IRS21094PBF does not integrate a bootstrap diode. An external fast-recovery or Schottky diode (e.g., 1N4148 or PMEG4010) must be used between VCC and VB to charge the high-side bootstrap capacitor during LO conduction. Diode reverse recovery time and forward voltage directly impact high-side supply stability and maximum duty cycle.