Infineon Technologies IRS2166DSTRPBF

Overview

IRS2166DSTRPBF from Infineon Technologies is a fully integrated 600 V fluorescent lamp ballast control IC combining critical-conduction-mode PFC, programmable half-bridge oscillator (73–81 kHz preheat / 40–46 kHz run), and high-side/low-side gate drivers. It features micropower startup (250 µA), internal 15.6 V zener clamp on VCC, and end-of-life protection with OTA-based EOL pin bias (2.0 V ±10 µA). Used in electronic ballasts for T5/T8 linear fluorescent lamps.

For engineers reviewing the IRS2166DSTRPBF datasheet, IRS2166DSTRPBF pinout, IRS2166DSTRPBF application, or IRS2166DSTRPBF equivalent, key selection criteria include VBUS regulation tolerance (±0.1 V), programmable deadtime (0.7–1.5 µs), CS overcurrent threshold (1.20 V typ), CPH charge current (3.6 µA typ), and SD/EOL shutdown hysteresis (2.7–5.5 V).

Technical Context

The IRS2166DSTRPBF implements a state-machine-driven ballast control architecture with five operational modes: UVLO, PREHEAT, IGNITION, RUN, and FAULT. Preheat frequency is set by RPH and CT (73–81 kHz), while run frequency is determined by RT and CT (40–46 kHz); both are independent of line voltage due to critical-conduction-mode PFC regulation.

Protection logic includes dual-path fault detection: instantaneous CS overcurrent (1.20 V threshold) triggers latch-off after 100 events in RUN mode, while SD/EOL pin provides non-latched shutdown (>5.0 V) for lamp removal and latched shutdown (2.7–3.3 V rising) for end-of-life detection. Internal bootstrap MOSFET enables self-biased high-side drive without external diode.

Key Specifications

Pinout & Package

IRS2166DSTRPBF is housed in a 16-lead SOIC package with exposed pad for thermal enhancement. Pin assignments follow standard Infineon ballast controller layout, supporting direct PCB routing to half-bridge power stage and PFC boost inductor.

Key Features

Applications

Equivalent & Alternatives

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

Compared with FAN7711MX and IRS2530DSTRPBF, the IRS2166DSTRPBF uniquely integrates CrCM PFC regulation, programmable timing, OTA-based EOL sensing, and internal bootstrap FET-enabling single-chip ballast solutions with extended lamp life and reduced external component count.

Availability

IRS2166DSTRPBF is available at Aetrix Electronics and suitable for electronic fluorescent ballasts, UV-C germicidal lamp drivers, and hybrid LED+PFC lighting systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for IRS2166DSTRPBF 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 global semiconductor leader specializing in power management, automotive, and industrial control ICs, with core expertise in high-voltage gate drivers and energy-efficient lighting solutions.

The IRS2166DSTRPBF belongs to Infineon's fluorescent ballast control product line, designed specifically for single-stage, high-efficiency electronic ballasts targeting T5/T8 lamps and specialty UV-C applications.

FAQ

What is the recommended minimum VCC supply current for stable operation?

The IRS2166DSTRPBF requires ≥5 mA into the VCC pin to maintain regulation of its internal 15.6 V zener clamp. Below this, VCC may drop below the 12.5 V UVLO threshold, causing intermittent restarts. A 15 V, 10 mA supply with 10 µF local decoupling is recommended for robust startup and fault recovery.

How does the internal bootstrap MOSFET affect PCB layout compared to discrete bootstrap diodes?

The integrated bootstrap MOSFET eliminates the need for an external high-voltage diode and reduces parasitic inductance in the bootstrap loop. This allows tighter placement of the VB capacitor near the IC, improving high-side drive stability and reducing EMI during 600 V switching transitions.

Can the IRS2166DSTRPBF drive MOSFETs with gate charges exceeding 50 nC?

Yes - the HO and LO drivers each deliver 260 mA sink / 180 mA source current, supporting gate charges up to 65 nC at 100 kHz with ≤220 ns rise time. For >50 nC devices, use 10 Ω gate resistors and ensure VB capacitor ≥100 nF to sustain bootstrap voltage during continuous conduction.

What happens if the RPH resistor opens during preheat mode?

An open RPH triggers automatic transition from PREHEAT to IGNITION mode: the CPH voltage ramp accelerates toward 12.0 V, increasing oscillator frequency from f_PH to f_RUN to initiate lamp striking. If ignition fails within 1 s, the IC enters FAULT mode and holds LO/HO low until VCC resets.