Infineon Technologies ICB1FL01G

Overview

ICB1FL01G from Infineon Technologies is a Smart Ballast Control IC designed for fluorescent lamp ballasts with integrated Discontinuous Conduction Mode (DCM) Power Factor Correction (PFC), half-bridge inverter control, and high-voltage level-shift gate drivers. It supports T5 lamps, enables end-of-life detection via adjustable ± lamp voltage thresholds (±1.5 V), detects rectifier effect by lamp voltage amplitude ratio, and provides self-adapting ignition time (40–235 ms). Used in commercial lighting systems requiring low external component count and RoHS-compliant design.

For engineers reviewing the ICB1FL01G datasheet, ICB1FL01G pinout, ICB1FL01G application, or ICB1FL01G equivalent, key selection considerations include its dual-mode PFC operation (CritCM/DCM), resistor-programmable preheat/run frequencies (20–150 kHz), lamp voltage sensing on LVS1/LVS2, latched overcurrent shutdown (1.6 V @ 400 ns on LSCS), and PG-DSO-18-1 package with integrated HV driver coreless transformer interface.

Technical Context

The ICB1FL01G implements a digitally assisted analog control architecture combining a DCM PFC preconverter with critical conduction mode (CritCM) transition under medium load and fixed-frequency start-up pulses (1–24 µs on-time, 40 µs off-time) before ZCD lock-in. Its inverter section uses dual lamp voltage sense inputs (LVS1/LVS2) to compute amplitude ratio for rectifier effect detection and ± threshold comparison for end-of-life identification.

Control parameters are set exclusively via external resistors: preheat time (0–2000 ms via RTPH), preheat frequency (≥ run frequency up to 150 kHz via RFPH), and run frequency (20–100 kHz via RFRUN). Gate drive outputs (LSGD, HSGD, PFCGD) feature asymmetric slew rates-220 ns rise / <50 ns fall-to reduce EMI and enable soft turn-on with fast turn-off, with 1.8 µs typical dead time between LSGD and HSGD.

Key Specifications

Pinout & Package

ICB1FL01G is housed in a PG-DSO-18-1 package - an 18-pin, 300-mil wide SOIC variant with exposed thermal pad and high-voltage isolation between low-side and high-side domains. Pin 15 and 16 are non-existing (n.e.) and must remain unconnected.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IRS2166D and UCC3305, the ICB1FL01G delivers superior system integration for multi-lamp T5 ballasts-combining programmable timing, dual-lamp-voltage sensing, and fault-aware restart in a single PG-DSO-18-1 package, reducing external component count by up to 30%.

Availability

ICB1FL01G is available at Aetrix Electronics and suitable for commercial office lighting, industrial high-bay fixtures, hospital corridor emergency systems, and outdoor streetlight retrofit projects requiring stable component supply, long-lifecycle assurance, and RoHS-compliant manufacturing.

Supply support for ICB1FL01G 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 AG is a German semiconductor manufacturer specializing in power management, automotive, and industrial control ICs, with global R&D and manufacturing facilities.

The ICB1FL01G belongs to Infineon's Smart Ballast IC product line-designed specifically for energy-efficient, digitally enhanced fluorescent lamp control with integrated PFC, inverter, and protection functions targeting T5 and T8 lamp systems.

FAQ

What is the minimum preheat time achievable with ICB1FL01G?

The ICB1FL01G supports preheat times from 0 ms up to 2000 ms, set by a single resistor on RTPH pin. At 0 ms setting, the IC skips preheat and initiates immediate ignition-suitable only for hot-restrike applications with verified lamp condition and stable thermal environment.

How does the ICB1FL01G detect end-of-life in multi-lamp configurations?

It uses dual lamp voltage inputs (LVS1/LVS2) to monitor amplitude asymmetry and apply user-adjustable ± thresholds (e.g., ±1.5 V). In multi-lamp topologies, each lamp's voltage is sensed individually via external signal routing, and the RES pin signals lamp removal or EOL event to trigger coordinated restart or shutdown per string.

Can the ICB1FL01G operate without a coreless transformer in the HV driver path?

No-the coreless transformer is integral to the internal high-side level-shifting architecture. Removing it disrupts HSGD functionality and violates the IC's isolation and timing specifications. The PG-DSO-18-1 layout assumes this transformer is part of the reference design; alternative level-shift methods are not supported.

What PFC bus voltage range does the PFCVS pin support?

The PFCVS pin accepts a resistive-divider-scaled voltage with thresholds at 0.375 V (15% undervoltage), 1.83 V (73% nominal), and 2.725 V (109% overvoltage) relative to a 2.5 V internal reference. This corresponds to a typical DC bus range of 300–450 V, supporting universal AC input (90–270 VAC) after bridge rectification and PFC boosting.