Infineon Technologies IRS2573DSTRPBF

Overview

IRS2573DSTRPBF from Infineon Technologies (formerly International Rectifier) is a fully-integrated 600V HID ballast control IC supporting buck pre-regulation and full-bridge lamp driving. It delivers continuous/critical-conduction-mode buck control, 600V high/low-side gate driving (180mA/260mA/400mA drive capability), constant lamp power regulation, and programmable fault counters for ignition failure, open-circuit, short-circuit, and arc instability - deployed in commercial and industrial HID lighting systems.

For engineers reviewing the IRS2573DSTRPBF datasheet, IRS2573DSTRPBF pinout, IRS2573DSTRPBF application, or IRS2573DSTRPBF equivalent, this page provides verified topology mapping (buck + full-bridge), confirmed 600V floating supply ratings, validated deadtime (1.2 µs), real-world lamp protection timing thresholds (e.g., 21 sec ignition counter), and SOIC28W package-specific thermal data (R_ΘJA = 78 °C/W).

Technical Context

The IRS2573DSTRPBF integrates dual control loops: a buck regulator loop using ICOMP/PCOMP error amplifiers with internal multiplier (KMULT = 2.0 V⁻¹) for constant lamp power, and a full-bridge oscillator (f_OSC = 160–240 Hz, 50% ±1% duty) synchronized to lamp voltage via ZX zero-cross detection. Its protection architecture uses dedicated analog comparators (VSENSE, ISENSE, OC, OV) feeding independent programmable counters with distinct time constants (e.g., 16384 cycles for transient under-voltage).

It implements three isolated floating supply domains: VB1/VS1 and VB2/VS2 for full-bridge high-side drivers (600V rating, 80 µA quiescent), and VBB/VSB for buck high-side driver (20.8 V clamp, 1 mA operating current). All outputs feature built-in bootstrap FETs and latch immunity, with micropower startup (150 µA) and 15.6 V internal zener clamping on VCC.

Key Specifications

Pinout & Package

Package: SOIC28W (Wide-body, 28-pin, 0.6 mm pitch, RoHS-compliant, MSL3 per J-STD-020).

Key Features

Applications

Equivalent & Alternatives

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

Compared with IRS2573DSTRPBF, IRS2575DSTRPBF offers higher voltage tolerance but removes integrated ignition, increasing system complexity; UCC28600DR lacks both voltage rating and topology compatibility for HID, making it non-interchangeable in ballast designs.

Availability

IRS2573DSTRPBF is available at Aetrix Electronics and suitable for street lighting ballasts, industrial high-bay fixtures, commercial parking garages, and warehouse area lighting requiring stable component supply across multi-year production cycles.

Supply support for IRS2573DSTRPBF 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 global semiconductor leader specializing in power management, sensor, and automotive ICs, with deep heritage in high-voltage control solutions acquired from International Rectifier.

The IRS2573DSTRPBF belongs to Infineon's HID Ballast Control IC product line, engineered specifically for robust, maintenance-free operation of 70–400W high-intensity discharge lamps in outdoor and industrial environments.

FAQ

What is the maximum allowable dV/dt on the VS1 pin?

The absolute maximum allowable dV/dt on VS1 is ±50 V/ns per datasheet Absolute Maximum Ratings. Exceeding this rate risks false triggering of internal level shifters or latch-up. Designers must limit layout parasitic inductance and use gate resistors that balance switching speed against this constraint - typical gate resistor values range from 10 Ω to 33 Ω for 600V MOSFETs driven by HO1/HO2.

How does the IRS2573DSTRPBF implement constant lamp power regulation?

Constant lamp power is achieved by multiplying sensed lamp voltage (VSENSE) and lamp current (ISENSE) internally (P_SENSE = 0.50 V typical), comparing the result to a reference set by IREF, then adjusting buck duty cycle via PCOMP/ICOMP error amplifiers. The internal multiplier gain KMULT = 2.0 V⁻¹ ensures linear power response across 0.465–0.535 V PSENSE range, enabling ±3% power regulation accuracy over temperature and line.

Can the IRS2573DSTRPBF drive IGBTs instead of MOSFETs in the full-bridge?

Yes - the 180 mA/260 mA source/sink capability and 600 V floating supply rating meet gate drive requirements for standard 600V IGBTs used in HID ballasts. However, due to slower IGBT turn-off, designers must increase deadtime beyond the default 1.2 µs (e.g., to 2.5 µs via external RC on CT pin) to prevent shoot-through, and verify VCE saturation voltage does not exceed 2 V during conduction to avoid excessive heating.

What is the purpose of the RST pin, and how should it be interfaced?

The RST pin resets all fault latches and clears internal counters when pulled low for ≥100 ns. It is compatible with microcontroller GPIOs or pushbutton switches. For automatic recovery, connect RST to a watchdog timer output; for manual reset, use a debounced switch to VCC through a 10 kΩ pull-up. Do not leave RST floating - internal weak pull-down ensures safe default state, but external pull-up guarantees deterministic startup behavior.