Infineon Technologies IRS2153DSPBF

Overview

IRS2153DSPBF from Infineon Technologies is a self-oscillating 600 V half-bridge gate driver IC with integrated bootstrap FET, 15.4 V VCC zener clamp, 50% max duty cycle, and 1.1 µs typical deadtime (IRS2153D variant). It drives external high- and low-side MOSFETs in resonant LLC and fluorescent lamp ballast circuits.

For engineers reviewing the IRS2153DSPBF datasheet, IRS2153DSPBF pinout, IRS2153DSPBF application, or IRS2153DSPBF equivalent, key selection criteria include oscillator programmability via RT/CT, ±50 V/ns dV/dt immunity, micropower startup current (130 µA), non-latched CT shutdown threshold (2.3 V), and SOIC-8 package compatibility with thermal resistance of 128 °C/W.

Technical Context

The IRS2153DSPBF implements a CMOS-based 555-timer–like oscillator front end with CT ramping between 4.66 V and 9.32 V, generating fixed-frequency square waves. Its HVIC architecture enables robust floating high-side drive referenced to VS, with internal level-shifting and pulse filtering for noise resilience.

Deadtime is generated by asymmetric R-S latch delays and fixed logic propagation paths-1.1 µs typ. for IRS2153D (not IRS21531D)-ensuring safe non-overlap between HO and LO outputs. The integrated bootstrap FET supplies VB with 55 mA typical source current at 13.7 V, eliminating need for external diode and capacitor in many low-power half-bridge designs.

Key Specifications

Pinout & Package

IRS2153DSPBF is housed in an 8-lead SOIC package (SO8), with creepage/clearance suitable for reinforced insulation in AC-line-connected applications. Thermal resistance is 128 °C/W (junction-to-ambient, board-mounted, still air).

Key Features

Applications

Equivalent & Alternatives

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

Compared with IRS2153DPBF, the DSPBF offers superior thermal dissipation in surface-mount layouts; versus IR21531DSTRPBF, it trades higher deadtime for integrated bootstrap simplicity-making it ideal for cost-sensitive, mid-frequency (<150 kHz) half-bridge systems.

Availability

IRS2153DSPBF is available at Aetrix Electronics and suitable for fluorescent lamp ballasts, LLC resonant converters, induction heating inverters, and DC-AC inverter modules requiring stable component supply and SOIC-8 manufacturability.

Supply support for IRS2153DSPBF 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 leadership in high-voltage gate driver technology.

The IRS2153x family targets cost-optimized, self-contained half-bridge control for lighting and resonant power conversion-designed to replace discrete 555-based oscillators with monolithic, latch-immune, thermally robust solutions.

FAQ

Can IRS2153DSPBF drive both MOSFETs and IGBTs?

Yes-it delivers 180 mA source and 260 mA sink current into gate capacitances up to 1 nF, sufficient for most 600 V MOSFETs and low-to-medium speed IGBTs used in ballasts and resonant converters. Gate drive strength is optimized for capacitive loads, not inductive switching; external gate resistors may be needed for IGBT turn-off control.

What happens if VCC exceeds 15.4 V?

The internal 15.4 V zener clamp activates, sinking excess current to COM. Sustained overvoltage causes excessive power dissipation in the clamp structure, risking thermal failure. The datasheet explicitly warns against driving VCC with a low-impedance DC source above VCLAMP-bias must be current-limited to ≤5 mA.

Is external bootstrap diode required with IRS2153DSPBF?

No-the device integrates a bootstrap FET that charges the VB capacitor during LO conduction. This eliminates the external diode in most designs, reducing part count and PCB area. However, a bootstrap capacitor (typically 0.1–0.22 µF) remains mandatory between VB and VS.

How does CT pin shutdown behave during overload?

When CT voltage falls below 2.3 V (1/6 × VCC), the oscillator halts and both HO and LO go low. Unlike latched protection, this is non-latching: once CT recovers above threshold, oscillation resumes automatically-no external reset or power cycle is needed, supporting graceful recovery from momentary overloads.