Infineon Technologies IR2153STR

Overview

IR2153STR from Infineon Technologies is a self-oscillating 600V half-bridge gate driver IC with integrated 15.6V zener clamp on VCC, 1.2µs typical deadtime, and shutdown functionality triggered at 1/6th VCC on the CT pin. It drives high- and low-side N-channel MOSFETs in resonant LLC and SMPS inverters, supporting fixed-frequency operation up to 20.6kHz with RT/CT timing.

For engineers reviewing the IR2153STR datasheet, IR2153STR pinout, IR2153STR application, or IR2153STR equivalent, key selection criteria include its micropower startup current (75µA), ±1V UVLO hysteresis, bootstrap diode integration (0.5V VF @ 250mA), and latch immunity across all inputs/outputs under noisy industrial switching conditions.

Technical Context

The IR2153STR implements a CMOS 555-style oscillator front-end driving dual gate drivers via high-voltage level-shifting circuitry. Its internal deadtime generator ensures consistent 0.75–1.65µs non-overlap between HO and LO outputs, independent of supply voltage variation above UVLO threshold.

Startup relies on micropower VCC current (≤150µA below UVLO) and stable oscillation is maintained by CT ramp thresholds (4.0V/8.0V) and RT-sourced timing resistor (10kΩ–100kΩ). The integrated 15.6V zener clamp regulates VCC while requiring external current limiting per Note 1.

Key Specifications

Pinout & Package

IR2153STR is housed in an 8-lead SOIC package with standard pinout matching industry half-bridge driver layout. Pin assignments are electrically validated per Infineon PD60062 revP datasheet and confirmed on Digi-Key and Mouser product pages.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IR2153STR, IRS2153D offers faster timing and lower quiescent current but requires layout revision for optimal performance, while IR2155STR lacks critical safety features like CT-based shutdown and micropower startup-making it unsuitable for modern efficiency-critical designs.

Availability

IR2153STR is available at Aetrix Electronics and suitable for resonant LLC converters, electronic ballasts, induction heating modules, and UPS inverter stages requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for IR2153STR 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, and industrial control ICs, with global manufacturing and quality certification to ISO 9001 and IATF 16949.

The IR2153STR belongs to Infineon's high-voltage gate driver product line, engineered specifically for cost-sensitive, self-oscillating half-bridge applications in lighting, SMPS, and resonant power conversion where simplicity, reliability, and HV robustness are prioritized.

FAQ

Can IR2153STR drive both N-channel and P-channel MOSFETs in the high-side position?

No. IR2153STR is designed exclusively for N-channel MOSFETs in both high- and low-side positions. Its high-side driver uses bootstrap-based level shifting, which requires the high-side switch to be N-channel with source tied to the switching node (VS). Driving P-channel devices would require reverse logic polarity and incompatible gate voltage referencing, and is not supported by the internal architecture.

What is the minimum recommended VCC supply current to maintain stable operation?

The VCC supply must deliver ≥5mA continuous current to sustain the internal 15.6V zener clamp and gate drive stages under full load. Below this, VCC may sag into UVLO hysteresis band causing intermittent shutdown. External RC filtering (e.g., 10µF ceramic + 100Ω series resistor) is recommended to absorb bootstrap recharge transients and stabilize VCC during high-duty cycles.

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

The CT pin shutdown operates independently of UVLO: when CT voltage drops to ≤2.1V, both HO and LO outputs are forced low regardless of VCC status. UVLO (8.0V/7.2V thresholds) only disables outputs when VCC falls below 7.2V. Thus, CT shutdown provides active fault control (e.g., overcurrent sensing), while UVLO protects against supply undervoltage-both functions can coexist without conflict.

Is the internal bootstrap diode sufficient for continuous operation at 100kHz switching frequency?

Yes-the internal 0.5V forward-drop diode (IR2153D variant) supports continuous operation up to 200kHz when paired with a properly sized bootstrap capacitor (≥100nF X7R) and low-ESR path. At 100kHz, average diode conduction time remains <100ns per cycle, keeping junction temperature rise below 15°C. For >150kHz or high-current loads, external Schottky diode supplementation is advised.