Infineon Technologies IR2166SPBF

Overview

IR2166SPBF from Infineon Technologies is a fully integrated 600V ballast control IC combining critical-conduction-mode 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 (up to 2 s), run frequency (39–50 kHz), and end-of-life protection for T5/T8 electronic ballasts.

For engineers reviewing the IR2166SPBF datasheet, IR2166SPBF pinout, IR2166SPBF application, or IR2166SPBF equivalent, key selection considerations include VBUS sensing range (0–5.5 V), programmable dead time (0.7–1.5 µs), micropower startup current (150 µA), internal 15.6 V zener clamp on VCC, and fault counter-based lamp-strike failure detection.

Technical Context

The IR2166SPBF implements a dual-loop control architecture: a PFC error amplifier with 3.7–4.2 V internal VBUS reference and ±30 µA output current drives the boost MOSFET via PFC pin, while a separate ballast oscillator (RT/CT/RPH-controlled) governs half-bridge timing with ignition ramping from preheat to run mode. The zero-crossing detector (ZX pin) enables critical conduction mode operation without external current sense resistors.

Protection logic integrates DC bus undervoltage reset (VBUSUV− = 2.6–3.3 V), overcurrent shutdown (CS threshold = 0.91–1.3 V, 25–90 fault cycles), and end-of-life detection (CPH > 12 V). Fault states are latched and managed by an internal counter, with automatic restart disabled during latch condition unless VCC drops below UVLO− (8.5–10.7 V).

Key Specifications

Pinout & Package

IR2166SPBF 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 IRS2166DSPBF, IR2166SPBF offers tighter integration and smaller footprint but lacks dual-lamp support; versus UCC3305PWR, it eliminates external PFC complexity and reduces component count by 7+ parts while delivering superior THD and PF performance.

Availability

IR2166SPBF is available at Aetrix Electronics and suitable for T5/T8 fluorescent ballasts, UV-C germicidal drivers, and medium-frequency inductive heating systems requiring stable component supply, long-lifecycle assurance, and industrial-grade thermal performance.

Supply support for IR2166SPBF 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 product line targets high-reliability electronic ballast systems for commercial and industrial lighting, integrating PFC, timing, and gate driving to replace multi-chip solutions with single-package robustness and programmability.

FAQ

What is the minimum V_CC startup current requirement for IR2166SPBF?

The IR2166SPBF features micropower startup with 150 µA typical ICC at turn-on. This allows direct capacitive dropper or high-value resistor biasing from rectified AC line, reducing auxiliary supply complexity. Startup occurs when VCC rises above 10.0–12.5 V (UVLO+ threshold), and the internal 15.6 V zener clamp regulates excess voltage-external current limiting is mandatory if VCC is sourced from low-impedance supplies.

How does the IR2166SPBF implement end-of-life (EOL) detection without external sensors?

EOL detection relies on internal monitoring of CPH pin voltage: as lamp electrodes degrade, preheat time increases, causing CPH to charge beyond 12 V (typical threshold). When SD/EOL pin is biased to 2.4–3.6 V, the IC interprets sustained CPH >12 V as end-of-life and initiates safe shutdown. No external thermistor or current sensor is needed-degradation is inferred from timing behavior under fixed preheat current (3.2 µA).

Can the IR2166SPBF drive 600V-rated MOSFETs directly without external level shifters?

Yes-the IR2166SPBF integrates high-side gate drivers with VB rated to 625 V and VS offset tolerance of −1 to +600 V, enabling direct drive of 600V MOSFETs in half-bridge configurations. Its HO output sustains 600V common-mode transients with dV/dt immunity up to 50 V/ns, and internal level-shifting circuitry eliminates need for external isolators or transformers in standard fluorescent ballast layouts.

What is the role of the RPH pin during lamp ignition, and how does it differ from RT?

RPH sets preheat frequency (73–84 kHz) together with CT; when RPH is open-circuited, the IC transitions from preheat to ignition ramp mode. RT sets final run frequency (39–50 kHz) and remains active only after CPH voltage exceeds VCC−2 V. Unlike RT, RPH is disconnected during ramp and run phases-its sole function is to establish initial heating frequency and trigger the ramp sequence upon open-circuit detection.