Infineon Technologies IR2166STRPBF

Overview

IR2166STRPBF from Infineon Technologies is a fully integrated 600V ballast control IC combining critical conduction mode (CrCM) PFC, fluorescent lamp preheat/run control, and half-bridge gate driving in a single SOIC-16 package. It delivers high power factor (>0.98), low THD (<10%), programmable preheat time (500–2000 ms), run frequency (39–50 kHz), and end-of-life protection with VCPH >12 V threshold. It is deployed in electronic ballasts for T5/T8 fluorescent lamps in commercial lighting systems.

For engineers reviewing the IR2166STRPBF datasheet, IR2166STRPBF pinout, IR2166STRPBF application, or IR2166STRPBF equivalent, key selection criteria include CrCM PFC regulation accuracy, dual-frequency oscillator programmability, integrated fault counter for lamp strike failure detection, and 15.6 V internal zener-clamped VCC supply with micropower startup (150 µA).

Technical Context

The IR2166STRPBF implements a two-stage control architecture: a CrCM boost PFC stage regulated via VBUS feedback and error amplifier compensation (COMP), and a resonant half-bridge driver stage controlled by a dual-mode oscillator (preheat at 73–84 kHz, run at 39–50 kHz). The PFC section uses zero-current detection (ZX pin) without a current-sense resistor, while the ballast stage employs programmable RPH/RT/CT components to set timing parameters.

Protection logic includes a 25–90-cycle fault counter for overcurrent events, DC bus undervoltage reset (VBUSUV− = 2.6–3.3 V), shutdown pin hysteresis (VSDTH+ = 4.5–5.6 V, VSDHYS = 100–350 mV), and end-of-life detection triggered when CPH exceeds 12 V. All functions operate under a single 15.6 V zener-regulated VCC rail with latch immunity and ESD protection.

Key Specifications

Pinout & Package

IR2166STRPBF is housed in a 16-lead narrow-body SOIC package (body width 3.9 mm, JEDEC MS-012AC), rated for industrial temperature range (−25 °C to +125 °C junction).

Key Features

Applications

Equivalent & Alternatives

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

Compared with FAN7711MX, IR2166STRPBF integrates full CrCM PFC regulation and lamp diagnostics, enabling single-IC compliance with energy standards; versus IRS2166DSPBF, it offers identical functionality in SOIC-16 tape-and-reel format optimized for SMT placement.

Availability

IR2166STRPBF is available at Aetrix Electronics and suitable for commercial lighting ballasts, industrial fluorescent lamp drivers, and energy-efficient retrofit kits requiring stable component supply across multi-year production cycles.

Supply support for IR2166STRPBF 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 global manufacturing and quality certification to ISO 9001 and IATF 16949.

The IR2166 belongs to Infineon's ballast control IC product line, designed specifically for high-efficiency, standards-compliant electronic fluorescent lamp drivers with integrated protection and diagnostics.

FAQ

What is the minimum VBUS voltage required to exit UVLO and enable PFC operation?

The IR2166STRPBF exits UVLO and enables PFC when VBUS rises above 2.6–3.3 V (VBUSUV− threshold). Below this level, the IC remains in shutdown mode regardless of VCC state. This ensures stable DC bus establishment before initiating boost conversion, preventing erratic startup behavior in low-line conditions.

Can the preheat and run frequencies be set independently, and how?

Yes - preheat frequency (73–84 kHz) is set by RPH and CT, while run frequency (39–50 kHz) is set by RT and CT. RPH and RT connect to separate internal current sources, allowing independent programming without shared component trade-offs. CT serves as the common timing capacitor for both modes.

How does the end-of-life (EOL) protection function without external sensors?

EOL protection monitors the CPH pin voltage, which ramps during preheat and stabilizes in run mode. As filaments age and resistance increases, CPH voltage rises beyond 10.3–13.2 V, triggering SD/EOL pin assertion. This eliminates need for external thermistors or current monitors while directly correlating to filament degradation.

Is an external bootstrap diode required for the high-side driver?

No - the IR2166STRPBF integrates a bootstrap diode between VB and VCC. Only an external bootstrap capacitor (CBOOT) is required between VB and VS. This reduces external component count and improves reliability in high-vibration lighting environments where discrete diodes may fail.