Infineon Technologies IRS2158DPBF

Overview

IRS2158DPBF from Infineon Technologies (formerly International Rectifier) is a fully integrated 600 V half-bridge ballast control IC for fluorescent lamp drivers, featuring programmable preheat frequency (63–73 kHz), run frequency (42.5–48.5 kHz), preheat time, ignition ramp, and closed-loop ignition current regulation. It integrates a low-offset op amp for dimming/control, internal 15.6 V zener clamp on VCC, and micropower startup (250 µA), deployed in electronic ballasts requiring <5% dimming capability.

For engineers reviewing the IRS2158DPBF datasheet, IRS2158DPBF pinout, IRS2158DPBF application, or IRS2158DPBF equivalent, key selection criteria include half-bridge V_OFFSET rating (600 V), dual-output drive capability (I_O+ = 180 mA, I_O− = 260 mA), programmable deadtime (1.5 µs), end-of-life window comparator, and 60-event fault counter - all critical for reliable fluorescent lamp ignition and lifetime protection.

Technical Context

The IRS2158DPBF implements a voltage-controlled oscillator (VCO) architecture with three distinct operating modes-preheat, ignition, and run-each governed by dedicated threshold voltages on the CPH pin (e.g., CPH_SOI− = 4.7 V, CPH_RUN+ = 9.3 V) and corresponding VCO pin behavior (V_VCOIGN = 0.65 V, V_VCORUN = open). Mode transitions are synchronized to lamp current feedback via the CS pin and regulated by internal OTA-based current sensing.

Protection logic combines latched and non-latched shutdown paths: SD/EOL pin supports both auto-restart (lamp removal) and latched EOL detection (VEOLTH+ = 3.0 V), while the 60-event up/down fault counter tracks CS overcurrent events across preheat and run modes. Brownout protection uses dual VCC UVLO thresholds (V_CCUV+ = 12.5 V, V_CCUV− = 10.5 V) with 2.0 V hysteresis.

Key Specifications

Pinout & Package

IRS2158DPBF is available in 16-pin PDIP and narrow-body SOIC-16N packages. Both share identical pin mapping and thermal characteristics (R_θJA = 70 °C/W for PDIP, 82 °C/W for SOIC).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fluorescent ballast control applications.

Compared with IRS2157D and UCC3305, IRS2158DPBF uniquely delivers integrated closed-loop ignition control, 600 V half-bridge drive, and multi-level fault logging - enabling higher system reliability and longer lamp service intervals in commercial-grade ballasts.

Availability

IRS2158DPBF is available at Aetrix Electronics and suitable for commercial fluorescent ballasts, dimmable T5/T8 electronic ballasts, industrial lamp ignition systems, and emergency lighting ballasts requiring stable component supply and long-term lifecycle support.

Supply support for IRS2158DPBF 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 continues to manufacture and support its high-voltage analog IC portfolio, including ballast controllers, motor drivers, and gate drivers.

The IRS2158DPBF belongs to Infineon's fluorescent ballast control IC product line, designed specifically for high-reliability, digitally programmable electronic ballasts targeting commercial and industrial lighting infrastructure.

FAQ

What is the function of the CPH pin on IRS2158DPBF?

The CPH pin outputs voltage levels that indicate operational mode: ~9.3 V during preheat and run, ~4.7 V during ignition, and ~0 V in fault. It serves as a diagnostic output for system microcontrollers to monitor ballast state and detect abnormal transitions, such as failure to progress from preheat to ignition.

Can IRS2158DPBF drive IGBTs directly?

No. IRS2158DPBF is optimized for MOSFET gate drive with 180 mA/260 mA peak output currents and 1.5 µs deadtime. Its output stage lacks the sustained current and Miller clamping needed for IGBTs; external gate drivers or dedicated IGBT controllers like IRS21844 are required for IGBT-based ballasts.

How does the internal 15.6 V zener clamp affect external VCC supply design?

The internal zener requires the external VCC supply to deliver sufficient current to maintain regulation at 15.6 V but must not be a low-impedance source exceeding 15.6 V DC. A typical design uses a resistive dropper or auxiliary winding with series diode and bulk capacitor, sized to supply ≥3.5 mA in run mode while staying within the 1.3 W package power limit.

Is the IRS2158DPBF RoHS compliant and qualified for industrial temperature range?

Yes. IRS2158DPBF is RoHS compliant and qualified to JEDEC Industrial standards (−40 °C to +125 °C junction temperature), with MSL2 rating for SOIC-16N and no moisture sensitivity classification for PDIP-16. Qualification data is documented in the official Infineon datasheet revision dated September 2009.