International Test Instruments Corporation IRS2530DPBF

Overview

IRS2530DPBF from Infineon Technologies (formerly International Rectifier) is a dimming ballast control IC with integrated half-bridge gate drivers, designed for electronic fluorescent lamp (CFL and linear T5/T8) ballasts. It delivers closed-loop lamp current dimming down to 10%, features internal non-ZVS and crest factor protection, 2.0 μs fixed dead-time, and micropower startup (250 μA). Used in single-lamp 1–10 V analog dimming systems.

For engineers reviewing the IRS2530DPBF datasheet, IRS2530DPBF pinout, IRS2530DPBF application, or IRS2530DPBF equivalent, key selection criteria include its 600 V high-side floating supply capability, dual 180 mA / 260 mA gate drive outputs, internal 15.6 V VCC zener clamp, programmable preheat time, and single-resistor lamp current sensing architecture.

Technical Context

This IC implements a voltage-controlled oscillator (VCO)-based frequency modulation scheme where lamp current feedback and 1–10 V dim input are coupled into a single DIM pin. The internal bootstrap MOSFET enables self-biased high-side drive without external charge pump components.

Protection logic integrates VS node slew-rate monitoring (±50 V/ns), non-ZVS detection at 4.5 V threshold, and crest factor fault tripping at 5.5× peak-to-average ratio. UVLO thresholds are 12.5 V (rising) and 10.5 V (falling) on VCC, with 2.0 V hysteresis.

Key Specifications

Pinout & Package

IRS2530DPBF is housed in an 8-pin PDIP package (0.300" wide), lead-free and RoHS-compliant. Pin assignments are validated per IRF datasheet DS-IRS2530D-S-RevB.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IRS2530DPBF, the SOIC variant trades higher thermal resistance for SMT compatibility, while the IRS25301DPBF adds automotive-grade robustness without altering dimming algorithm or pinout-enabling drop-in qualification upgrades in existing designs.

Availability

IRS2530DPBF is available at Aetrix Electronics and suitable for linear dimming ballasts, 3-way switch dimming ballasts, and multi-level CFL retrofit systems requiring stable component supply and long-term manufacturing continuity.

Supply support for IRS2530DPBF 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 acquired International Rectifier in 2015 and maintains full product support, documentation, and qualification for legacy IR ballast ICs.

The IRS2530x family targets cost-sensitive, high-reliability fluorescent lamp control-optimized for minimal external components, flash-free ignition, and compliance with IEC 61000-3-2 harmonic standards.

FAQ

What is the maximum allowable dV/dt on the VS pin?

The VS pin supports ±50 V/ns slew rate under normal operation. Exceeding this may trigger false non-ZVS fault detection or compromise internal protection accuracy. Layout best practice requires minimizing trace inductance between VS and half-bridge output node to avoid ringing-induced false trips.

Can IRS2530DPBF drive MOSFETs directly without external gate resistors?

Yes-its 180 mA source and 260 mA sink capability allows direct gate drive of small-to-medium MOSFETs (Qg < 25 nC). For larger devices or EMI-sensitive layouts, a 5–10 Ω series gate resistor is recommended to damp ringing and limit peak current during switching transitions.

How does the DIM pin simultaneously accept dim voltage and lamp current feedback?

The DIM pin uses internal analog summing: DC dim voltage (1–10 V) biases the VCO comparator, while AC lamp current-rectified and filtered through external RC-modulates the same node. This coupling enables closed-loop regulation without separate op-amp circuitry, verified in Figure 11 of the original IR datasheet.

Is the internal bootstrap MOSFET sufficient for continuous operation in high-duty-cycle applications?

Yes-the internal bootstrap FET sustains >100 mA average current at 100 kHz with 50% duty cycle when CBS = 0.1 μF. Its 13.3 V turn-on threshold ensures reliable charging even during deep dimming (low fSW), eliminating need for external bootstrap diodes in most CFL and T5 applications.