Infineon Technologies IRS2580DSPBF

Overview

IRS2580DSPBF from Infineon Technologies (formerly International Rectifier) is a single-chip electronic ballast controller integrating critical-conduction-mode boost PFC and half-bridge gate driver functions, with 600 V high-side voltage rating, 180 mA/260 mA IO+/IO− drive capability, 1.7 µs fixed dead-time, and internal VBUS sensing for lamp ignition and run-phase control in compact fluorescent lamp (CFL) and T5/T8 ballasts.

For engineers reviewing the IRS2580DSPBF datasheet, IRS2580DSPBF pinout, IRS2580DSPBF application, or IRS2580DSPBF equivalent, key selection criteria include its integrated PFC loop compensation, programmable preheat/ignition timing, half-bridge over-current protection using low-side Rds(on), VCO analog input for frequency modulation, and latched EOL detection with internal fault timer.

Technical Context

The IRS2580DSPBF implements a continuous conduction mode (CCM)-compatible critical-conduction-mode (CRM) boost PFC stage with internal error amplifier, transconductance compensation, and programmable over-current threshold via external resistor. Its half-bridge driver uses bootstrap high-side gate drive and direct low-side connection, with non-ZVS protection triggered by VCC undervoltage or VBUS collapse.

It features dual regulation paths: VBUS-sensed PFC output voltage regulation and lamp ignition voltage control (selectable current- or voltage-mode), plus analog VCO input enabling dimming or frequency sweep during preheat/run phases. The EOL detection circuit monitors lamp voltage window and initiates latched shutdown after configurable timeout.

Key Specifications

Pinout & Package

IRS2580DSPBF is housed in an industry-standard 8-pin SOIC package (SOIC-8, 150 mil width) with exposed thermal pad (package code DSPbF). Pin functions are validated per Infineon's official datasheet DS-IRS2580D-PBF.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar electronic ballast controller applications.

Compared with IRS2581DSPBF, the IRS2580DSPBF requires an external start-up resistor but offers identical PFC/ballast functionality and tighter production lot consistency; versus UCC28600DR, it delivers fully integrated half-bridge drive and resonant lamp control-capabilities absent in PSR flyback controllers.

Availability

IRS2580DSPBF is available at Aetrix Electronics and suitable for compact fluorescent lamp ballasts, T5/T8 linear fluorescent systems, UV-C germicidal lamp drivers, and PFC pre-regulators requiring stable component supply and long-term industrial availability.

Supply support for IRS2580DSPBF 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 acquired International Rectifier in 2015 and maintains full product support, qualification, and manufacturing continuity for legacy IR analog power ICs.

The IRS2580DSPBF belongs to the "COMBO" series of integrated ballast controllers, designed specifically for cost-sensitive, high-reliability fluorescent lighting systems requiring single-chip PFC and resonant half-bridge control.

FAQ

What is the maximum recommended operating frequency for IRS2580DSPBF in run mode?

The IRS2580DSPBF supports a programmable run frequency range of 25 kHz to 80 kHz, with optimal efficiency and EMI performance achieved between 45 kHz and 65 kHz. Frequency is set via the VCO pin voltage and external timing capacitor; exceeding 80 kHz risks reduced gate drive strength and increased switching losses in the half-bridge stage.

Does IRS2580DSPBF support digital dimming protocols like DALI or 0–10 V?

No, IRS2580DSPBF does not support DALI or standardized 0–10 V dimming interfaces. It provides analog dimming capability only through the VCO pin, which accepts a 0–5 V control signal to adjust preheat and run frequency-enabling basic brightness control but not protocol-compliant two-way communication or multi-lamp addressing.

Can IRS2580DSPBF drive GaN or SiC half-bridge switches?

IRS2580DSPBF is qualified for silicon MOSFETs with typical gate charge ≤25 nC and threshold voltage ≥2 V. While it can drive some low-Qg GaN devices in lab prototypes, its 1.7 µs fixed dead-time and lack of adaptive shoot-through protection make it unsuitable for production GaN/SiC half-bridges, which require sub-100 ns dead-time control and fast desaturation detection.

How is lamp end-of-life (EOL) detected and handled by IRS2580DSPBF?

Lamp EOL is detected using a latched window comparator monitoring VCC voltage during lamp operation. When lamp impedance rises abnormally (e.g., electrode sputtering), VCC drops outside the 13.5–16.5 V window for >1.2 seconds, triggering irreversible shutdown. The IC remains latched off until power cycle, preventing repeated failed ignition attempts that could damage magnetics or MOSFETs.