International Test Instruments Corporation IR21592PBF

Overview

IR21592PBF from Infineon Technologies is a dimming electronic ballast controller and 600V half-bridge gate driver integrated in a single 16-pin SOIC package. It implements phase-controlled transformer-less lamp power sensing, closed-loop preheat current regulation (0–750 µA), programmable ignition-to-dim time (1–5 s), and 0.5–5 VDC analog dimming interface. It is designed for compact, high-reliability fluorescent lamp ballasts in commercial lighting systems.

For engineers reviewing the IR21592PBF datasheet, IR21592PBF pinout, IR21592PBF application, or IR21592PBF equivalent, key selection criteria include its integrated VCO frequency range (16.5–108 kHz), internal current sense blanking (291–1030 ns), zener-clamped VCC (15.6 V), thermal shutdown at 165°C, and dual-mode protection for lamp strike failure and filament open-circuit conditions.

Technical Context

The IR21592PBF employs a voltage-controlled oscillator (VCO) architecture with externally programmable minimum frequency via R_FMIN (10–100 kΩ), enabling precise control of lamp operating frequency during preheat, ignition, and dim modes. Its phase-control-based lamp power sensing eliminates external transformers and supports real-time regulation using CS input voltage (0–1.9 V threshold) and internal current mirror circuitry referenced to IPH and CPH pins.

State-machine operation includes four distinct modes-UVLO, Preheat, Ignition, and Dim-with automatic transitions triggered by VCS crossing VIPH, SD voltage thresholds (1.6–2.6 V), and VCC undervoltage lockout (12.0–13.0 V). Fault latching and automatic restart are implemented via dedicated SD pin logic and internal thermal detection at 165°C junction temperature.

Key Specifications

Pinout & Package

IR21592PBF is housed in a 16-pin narrow-body SOIC package (body width 3.9 mm, JEDEC MS-012AC), optimized for surface-mount assembly in space-constrained lighting control PCBs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dimming ballast controller applications.

Compared with IR21592PBF, IR21593PBF offers extended frequency headroom for miniaturized magnetics but sacrifices some noise immunity at low frequencies; UCC3305D reduces integration but increases design complexity and component count for half-bridge implementations.

Availability

IR21592PBF is available at Aetrix Electronics and suitable for commercial office lighting, industrial high-bay fixtures, hospitality dimming systems, and emergency exit sign ballasts requiring stable component supply and long-term production continuity.

Supply support for IR21592PBF 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 IR2159x product line was developed specifically for digitally enhanced fluorescent ballast designs, integrating analog control loops, fault management, and half-bridge driving to replace multi-chip discrete solutions in energy-efficient lighting.

FAQ

What is the purpose of the CPH pin and how is it configured?

The CPH pin serves as the preheat timing capacitor node. It charges linearly at 1.3 µA sourced from IPH, and its voltage ramp determines preheat duration. When CPH reaches ~5.0 V, the IC transitions from Preheat to Ignition mode. An external capacitor (typically 10–100 nF) is connected between CPH and COM to set the desired preheat time, with typical values yielding 0.5–2 s ramps.

How does the IR21592PBF detect lamp ignition failure?

Lamp ignition failure is detected when the CS pin voltage remains below the 1.6 V over-current threshold (VCSTH) for longer than the programmed ignition timeout. This condition-combined with SD pin voltage rising above 2.0 V or VCC dropping below 10.9 V-triggers FAULT mode latching. The IC disables both HO and LO outputs and enters a 240 µA quiescent state until reset via power cycle or SD pin deactivation.

Can the IR21592PBF drive MOSFETs directly without external gate resistors?

No. Although IR21592PBF integrates 600V half-bridge drivers, external gate resistors (typically 10–47 Ω) are required to control rise/fall times, suppress ringing, and limit peak gate current. The datasheet specifies tr = 48.5–180 ns and tf = 24.25–145 ns under 1000 pF load; omitting gate resistors risks MOSFET oscillation, shoot-through, or EMI compliance failure.

What is the role of the VDC pin and how is it connected?

The VDC pin monitors rectified AC line or DC bus voltage for brown-out detection. It connects to the positive DC bus through a resistor divider (e.g., 1 MΩ + 100 kΩ) to scale 300–400 V down to 3–5 V. When VDC falls below 3.0 V, the IC enters UVLO mode, halting operation to prevent unstable lamp starting. This pin also enables bus-fault detection independent of VCC supply status.