Infineon Technologies IRS2166DSPBF

Overview

IRS2166DSPBF from Infineon Technologies is a fully integrated 600 V fluorescent lamp ballast control IC combining critical-conduction-mode PFC, half-bridge driver, and lamp protection logic in a single SOIC-16 package. It delivers programmable preheat (73–81 kHz) and run frequencies (40–46 kHz), 1.0 µs deadtime, 15.6 V internal zener clamp, and micropower startup (250 µA) for electronic ballast systems driving T5/T8 lamps.

For engineers reviewing the IRS2166DSPBF datasheet, IRS2166DSPBF pinout, IRS2166DSPBF application, or IRS2166DSPBF equivalent, key selection considerations include VBUS regulation tolerance (±0.1 V), CS overcurrent threshold (1.20 V typ), EOL latched shutdown (3.0 V threshold), and bootstrap MOSFET integration - all critical for reliable lamp ignition and end-of-life detection in commercial lighting fixtures.

Technical Context

The IRS2166DSPBF implements a state-machine-based ballast controller with five operational modes: UVLO, PREHEAT, IGNITION, RUN, and FAULT. Its PFC stage operates in critical conduction mode with internal OTA error amplifier (30 µA sourcing, 35 µA sinking), while the half-bridge oscillator uses CT/RPH/RT timing elements to set preheat, ramp, and run frequencies independently.

Protection architecture includes dual-threshold SD/EOL pin (5.0 V rising, 3.0 V falling for lamp removal; 3.0 V rising, 1.0 V falling for end-of-life latch), 100-event CS fault counter, DC bus undervoltage reset (3.0 V), and automatic restart on power recovery - all implemented without external comparators or timers.

Key Specifications

Pinout & Package

IRS2166DSPBF is housed in a 16-lead SOIC package with exposed pad (RoHS-compliant, Pb-free). Pin layout supports compact PCB routing for high-voltage ballast designs, with dedicated high-side floating terminals (VB, VS, HO) isolated from low-side logic (COM, VCC, LO).

Key Features

Applications

Equivalent & Alternatives

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

Compared with IRS2166DPBF, the DSPBF variant offers superior thermal performance and SMT compatibility; versus FAN7711MX, it delivers full PFC integration and lamp lifecycle management - making it the sole choice for Class C-compliant, long-life commercial ballasts.

Availability

IRS2166DSPBF is available at Aetrix Electronics and suitable for commercial lighting fixtures, T5/T8 electronic ballasts, industrial high-bay systems, and HVAC-integrated lighting requiring stable component supply and long-term lifecycle support.

Supply support for IRS2166DSPBF 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 drivers and lighting control solutions.

The IRS2166D series belongs to Infineon's fluorescent ballast control product line, designed specifically to replace discrete PFC + oscillator + protection circuits in energy-efficient lighting systems compliant with IEC 61000-3-2.

FAQ

What is the function of the CPH pin in IRS2166DSPBF?

The CPH pin monitors preheat progress by integrating current from the RPH resistor. When CPH voltage reaches 10.8 V, the IC transitions from PREHEAT to IGNITION mode; at 12.0 V, it enters RUN mode. During faults, CPH discharges to 0 V, enabling automatic recovery after power cycling.

Can IRS2166DSPBF operate without an external PFC inductor?

No. The IRS2166DSPBF requires an external boost inductor, diode, and capacitor to implement critical-conduction-mode PFC. Its PFC gate driver (PFC pin) controls the boost switch, but the passive PFC components must be externally selected per input voltage, output power, and THD requirements.

How does the SD/EOL pin differentiate between lamp removal and end-of-life conditions?

The SD/EOL pin uses two distinct voltage thresholds: >5.0 V (rising) indicates lamp removal and triggers non-latched shutdown with auto-restart; >3.0 V (rising) during RUN mode indicates end-of-life and triggers latched shutdown requiring power cycle. Hysteresis (3.0 V falling) prevents chatter during marginal conditions.

Is the internal bootstrap MOSFET sufficient for driving 600 V half-bridge switches?

Yes. The internal bootstrap MOSFET provides VB supply to the high-side driver with 55 µA sourcing capability at 13.7 V, sufficient for driving standard 600 V IGBTs or MOSFETs with gate charge ≤50 nC at 40–80 kHz. No external bootstrap diode or capacitor is needed.