Infineon Technologies IR21593PBF

Overview

IR21593PBF from Infineon Technologies is a dimming electronic ballast controller and 600V half-bridge gate driver IC for fluorescent lamps. It integrates transformer-less lamp power sensing, closed-loop preheat current control, programmable ignition-to-dim timing, 0.5–5VDC analog dimming interface, and full lamp fault protection including open/short filament, no-strike, and thermal shutdown. Used in commercial dimmable CFL and T5/T8 ballasts.

For engineers reviewing the IR21593PBF datasheet, IR21593PBF pinout, IR21593PBF application, or IR21593PBF equivalent, key selection criteria include VCO frequency range (30–230 kHz), HO/LO deadtime (1.0 µs), integrated preheat/ignition sequencing, lamp power regulation accuracy, and compatibility with 600V half-bridge topologies in energy-efficient lighting systems.

Technical Context

The IR21593PBF implements phase-controlled lamp power regulation using a voltage-controlled oscillator (VCO) with externally programmable minimum frequency (via RFMIN resistor). Its architecture supports transformer-less current sensing via CS pin with internal blanking (291–1030 ns) and zero-crossing detection for precise lamp current waveform shaping.

It features dual-mode operation: preheat mode (CPH charging at 1.3 µA typical) followed by ignition mode (VCS > VIPH threshold), then dim mode with phase-shifted dimming control. Protection logic includes UVLO (12.5V turn-on, 1.6V hysteresis), overcurrent (1.6V CS threshold), thermal shutdown (165°C), and automatic restart after fault clearance.

Key Specifications

Pinout & Package

IR21593PBF is housed in a 16-pin narrow-body SOIC package (body width 3.9 mm, JEDEC MS-012AC), optimized for surface-mount assembly in compact ballast PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IR21592PBF and IRS2166DSTRPBF, the IR21593PBF delivers the widest dimming-compatible VCO range (30–230 kHz), shortest deadtime for fast-switching MOSFETs, and full analog dimming interface-making it optimal for modern high-frequency, digitally controllable fluorescent systems.

Availability

IR21593PBF is available at Aetrix Electronics and suitable for commercial lighting ballasts, fluorescent retrofit drivers, and emergency lighting systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for IR21593PBF 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 series belongs to Infineon's fluorescent ballast controller product line, designed specifically for energy-efficient, dimmable electronic ballasts targeting commercial and industrial lighting markets.

FAQ

What is the function of the CPH pin on IR21593PBF?

The CPH pin serves as the preheat timing capacitor connection point. It charges at a nominal 1.3 µA current sourced from IPH during preheat mode. When CPH voltage reaches ~5.0 V, the IC detects end-of-preheat and transitions to ignition mode. During faults or UVLO, CPH discharges to 0 V, resetting the sequence.

How does the IR21593PBF implement transformer-less lamp power sensing?

It uses phase-control-based sensing: the VDC pin monitors rectified AC line voltage, while the CS pin measures lamp current through a low-side shunt. The internal phase comparator correlates VDC zero-crossings with CS waveform timing to derive lamp power without a current transformer, reducing size and cost.

Can IR21593PBF drive IGBTs instead of MOSFETs in the half-bridge?

No-the IR21593PBF's HO and LO drivers are optimized for N-channel MOSFETs with fast turn-on/turn-off (120 ns rise, 65 ns fall). Its 1.0 µs deadtime and gate drive strength (±500 mA peak) are insufficient for typical IGBT gate charge requirements and slower switching dynamics.

What happens when the SD pin voltage exceeds 2.0 V?

The SD pin triggers a latched fault condition: all gate outputs (HO/LO) disable immediately, the VCO stops oscillating, CPH resets to 0 V, and quiescent current drops to 240 µA. The IC remains in FAULT mode until SD falls below 1.7 V and VCC recovers above 12.5 V, enabling automatic restart.