Infineon Technologies IR2154

Overview

IR2154 from Infineon Technologies is a self-oscillating 600V half-bridge gate driver IC with integrated oscillator, 1.2 µs typical deadtime, 15.6V VCC zener clamp, and shutdown functionality on the CT pin. It drives high- and low-side N-channel MOSFETs in resonant LLC, ballast, and HID lamp control circuits where precise timing and noise immunity are critical.

For engineers reviewing the IR2154 datasheet, IR2154 pinout, IR2154 application, or IR2154 equivalent, key selection criteria include its micropower startup current (75 µA), 1V UVLO hysteresis, 80/40 ns rise/fall times, and CT-pin–based shutdown threshold (2.1 V) - all verified in PD60063I Preliminary Data Sheet.

Technical Context

The IR2154 integrates a CMOS 555-style oscillator front end with independent RT/CT timing inputs, generating fixed 50% duty cycle outputs with constant pulse widths at startup once VCC exceeds 9.0 V. Its internal deadtime circuit ensures 0.6 µs typical separation between HO and LO transitions, tightly controlled across temperature.

High-side level shifting uses a robust floating architecture referenced to VS, supporting up to 600 V offset with ≤50 V/ns dV/dt immunity. All inputs and outputs feature latch immunity and ESD protection per MIL-STD-883 Class 3B, enabling reliable operation in noisy industrial switching environments.

Key Specifications

Pinout & Package

Available in 8-lead PDIP and 8-lead SOIC packages with identical pin mapping. Both packages support through-hole and surface-mount assembly, with thermal resistance of 125 °C/W (PDIP) and 200 °C/W (SOIC).

Key Features

Applications

Equivalent & Alternatives

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

Compared with IR2153 and IRS2153D, the IR2154 delivers superior startup stability (75 µA vs ≥200 µA), tighter deadtime control (±0.25 µs vs ±0.5 µs), and system-level fault response via CT shutdown - making it optimal for safety-critical lighting and resonant power conversion.

Availability

IR2154 is available at Aetrix Electronics and suitable for electronic ballast control, HID lamp ignition, and LLC resonant converter designs requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for IR2154 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 global semiconductor leader headquartered in Munich, Germany, specializing in power management, automotive, and industrial control ICs.

The IR2154 belongs to Infineon's high-voltage gate driver product line, engineered specifically for self-oscillating half-bridge topologies in lighting and resonant power conversion where reliability under dV/dt stress and startup consistency are essential.

FAQ

What is the minimum VCC supply current required to maintain the 15.6 V zener clamp?

The IR2154 requires ≥5 mA into the VCC pin to sustain regulation at the nominal 15.6 V clamp voltage, as confirmed in the Recommended Operating Conditions table (ICC = 5 mA). Below this, VCC may drop below clamp level, causing UVLO activation or oscillator instability. This current must be delivered continuously during normal operation, not just at startup.

Can the IR2154 drive both high-side and low-side P-channel MOSFETs?

No - the IR2154 is designed exclusively for N-channel MOSFETs. Its HO and LO outputs are source-follower compatible only with N-channel devices: HO sources current into the high-side gate (requiring bootstrap VB), and LO sinks current from the low-side gate. Driving P-channel devices would invert logic polarity and violate internal level-shifter architecture, risking shoot-through or failure.

How does the CT pin shutdown function interact with UVLO behavior?

CT shutdown operates independently of UVLO: when CT voltage falls below 2.1 V, both HO and LO outputs disable immediately, regardless of VCC level. During UVLO (VCC < 8.1 V), the device enters micropower mode with RT outputting low and CT sinking 0.7 mA, but shutdown only activates if CT is externally pulled below threshold - not automatically upon UVLO entry. This allows separate control of fault disable and brown-out recovery.

What is the maximum allowable dV/dt on the VS node, and why is it critical?

The absolute maximum dV/dt on VS is ±50 V/ns, per Absolute Maximum Ratings. Exceeding this risks false triggering of the high-side level shifter due to capacitive coupling, leading to unintended HO turn-on and shoot-through. The IR2154's design assumes proper PCB layout (minimized loop area), snubbing, and bootstrap capacitor selection to keep dV/dt within spec - especially during hard-switching transitions in LLC or induction heating.