Infineon Technologies IR2167PBF

Overview

IR2167PBF from Infineon Technologies is a fully integrated 600V fluorescent lamp ballast control IC combining PFC, half-bridge driver, and ballast timing logic in one SOIC-20 package. It implements critical conduction mode boost PFC with no current-sense resistor, programmable preheat/ignition timing, and comprehensive protection including end-of-life detection, capacitive-mode protection, and thermal shutdown at 160°C - deployed in electronic ballasts for T5/T8 linear and compact fluorescent lamps.

For engineers reviewing the IR2167PBF datasheet, IR2167PBF pinout, IR2167PBF application, or IR2167PBF equivalent, key selection criteria include VCC undervoltage lockout (11.4 V), CT-based oscillator frequency (44 kHz typ), deadtime programmability via RDT, PFC zero-crossing sensing on ZX pin, and dual-mode CPH voltage thresholds (4.1 V ignition / 5.1 V run) for lamp state management.

Technical Context

The IR2167PBF integrates a variable-frequency oscillator with externally programmable deadtime (via RDT) and T-flip-flop-based 50% duty-cycle control for half-bridge gate drive. Its PFC section uses critical conduction mode with ZX pin zero-current detection and internal error amplifier (gm = 90 µmho) referenced to VBUS.

Protection architecture includes a fault counter tracking over-current events (55 cycles before latch-off), dual-threshold shutdown (SD pin: 5.25 V normal / 3.0 V end-of-life), and micropower UVLO mode (250 µA quiescent current) activated below 11.4 V VCC.

Key Specifications

Pinout & Package

IR2167PBF is housed in a 20-lead wide-body SOIC package (package code: SOIC-20WB), surface-mount compatible with standard reflow profiles and rated for 1.25 W power dissipation at T_A ≤ 25°C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IR2166PBF, IR2167PBF adds end-of-life detection and brown-out protection at minimal cost premium; compared with BD7880FS-E2, it integrates PFC control but lacks 650 V rating - making IR2167PBF optimal for compact, single-IC fluorescent ballasts demanding full protection and lamp lifecycle management.

Availability

IR2167PBF is available at Aetrix Electronics and suitable for electronic ballast designs, fluorescent lamp retrofit systems, and industrial UV curing equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for IR2167PBF 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 energy-efficient lighting solutions.

The IR2167PBF belongs to Infineon's ballast control IC product line, designed specifically for single-chip fluorescent lamp electronic ballasts requiring integrated PFC, resonant ignition, and multi-layer protection - targeting commercial, industrial, and retrofit lighting applications.

FAQ

What is the purpose of the CPH pin and how does it affect lamp operation?

The CPH pin is a critical state-tracking node that charges via internal current sources to define operational mode: 0–4.0 V = preheat, 4.1 V = ignition ramp start, 5.1 V = run mode entry. Its voltage progression directly controls timing sequence, filament heating profile, and transition to steady-state operation - enabling reliable cold-start and extended lamp life.

How does the IR2167PBF implement critical conduction mode (CrM) PFC without a current-sense resistor?

It uses the ZX pin to detect zero-crossing of the PFC inductor current, combined with fixed-frequency oscillator timing and internal logic to trigger switch turn-on precisely at current zero. This eliminates the need for a shunt resistor while maintaining CrM efficiency and low THD - confirmed by typical 0.98 PF and <10% THD in reference designs.

Can the IR2167PBF be used in LED driver applications?

Yes - primarily in the PFC front-end stage of hybrid LED drivers. The IC's CrM boost PFC section can generate a well-regulated DC bus (e.g., 400 V) for downstream LED constant-current controllers, leveraging its brown-out protection, THD performance, and IEC 61000-3-2 compliance - though LO/HO outputs must be disabled or unused.

What happens when the SD pin voltage drops below 1.0 V or rises above 3.0 V during operation?

That condition triggers end-of-life detection: the IC enters FAULT mode, disables all outputs (HO/LO/PFC), pulls COMP to 0 V, and holds CPH at 0 V. Recovery requires cycling SD (high-then-low) or power-cycling VCC - preventing unsafe operation with degraded or open filaments, a key safety feature for commercial lighting installations.