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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Lighting, Ballast Controllers

Infineon Technologies IR21592S

Name: IR21592S
Brand: Infineon Technologies
SKU: IR21592S
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IR21592S

Manufacturer:: Infineon Technologies

Category:: Lighting, Ballast Controllers

Package:: 16-SOIC (0.154", 3.90mm Width)

Datasheet:: IR21592S.pdf

Description:: IC BALLAST CNTRL 95KHZ 16SOIC

Quantity:: RFQ Add To RFQ list

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Inventory:3,305

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Product details

Overview

IR21592S from Infineon Technologies is a dimming fluorescent ballast controller and 600V half-bridge driver IC in a single 16-pin SOIC package. It integrates transformer-less lamp power sensing, closed-loop preheat current control (0.8–2.1 µA CPH charging), programmable ignition-to-dim time, and 0.5–5 VDC analog dimming interface for electronic ballasts driving single linear fluorescent lamps.

For engineers reviewing the IR21592S datasheet, IR21592S pinout, IR21592S application, or IR21592S equivalent, this page delivers verified functional architecture, validated pin-level circuit roles, confirmed lamp fault protection behavior, and real-world dimming interface design constraints - all grounded in Infineon's PD60194 revD specification.

Technical Context

The IR21592S implements phase-control-based lamp power regulation using internal voltage-controlled oscillator (VCO) with externally set minimum frequency (16.5–26 kHz at V_VCO = 0 V, RF_MIN = 40 kΩ). Its preheat mode uses CPH pin voltage ramping (0.8–2.1 µA charging current) to regulate filament current before ignition.

Lamp ignition detection relies on CS pin overcurrent threshold (1.2–1.9 V) and IPH reference current (25 µA), while dimming operation activates when CPH exceeds 5.1 V and DIM input is applied. Fault handling includes UVLO (12.0–13.0 V), thermal shutdown (165 °C), and automatic restart after SD pin release.

Key Specifications

Parameter	Value and Actual Design Meaning
V_HO/V_LO Drive	600V high-side / ground-referenced low-side gate drivers with 1.8 µs deadtime for half-bridge MOSFET control
VCO Frequency Range	16.5–26 kHz (IR21592) with external R_FMIN and C_VCO; sets lamp operating frequency and EMI profile
Dimming Input	0.5–5 VDC analog interface; maps linearly to lamp power output via internal current mirror and phase control
Preheat Control	Programmable CPH charging current (0.8–2.1 µA) and ignition threshold (4.3–5.7 V) for controlled filament warm-up
Fault Protection	Integrated UVLO (12.0–13.0 V), overcurrent (CS ≥ 1.6 V), overtemperature (T_J ≥ 165 °C), and brown-out detection
Supply Clamp	Internal 15.6 V zener clamp on VCC; requires external current limiting to avoid exceeding 10 mA clamp current
Package	16-pin narrow-body SOIC; supports surface-mount assembly and thermal dissipation up to 1.25 W at T_A ≤ 25 °C

Pinout & Package

IR21592S is housed in a 16-pin narrow-body SOIC package (body width 3.9 mm), optimized for compact fluorescent ballast PCB layouts with creepage/clearance compliance for 600 V floating high-side operation.

Pin/Terminal	Circuit Role	Design Meaning
1 (VDC)	Rectified AC line voltage sense input	Detects DC bus presence and enables UVLO/line-fault protection; threshold at 5.1 V
2 (VCO)	Voltage-controlled oscillator input	Accepts 0–5 V to modulate lamp frequency; discharge currents vary by mode (preheat/dim/fault)
3 (CPH)	Preheat timing capacitor connection	Charges at 0.8–2.1 µA; voltage ramp triggers ignition when >4.3 V and ends preheat when >5.1 V
4 (DIM)	Analog dimming control input	0.5–5 VDC sets lamp power level; referenced to COM; drives internal current mirror for phase shift
5 (MAX)	Maximum lamp power setting	Voltage-controlled current source (0–750 µA); sets upper bound of regulated lamp power
6 (MIN)	Minimum lamp power setting	1–3 V input defines lower power limit during dimming; referenced to COM
7 (FMIN)	Minimum frequency programming	Resistor-connected pin sets VCO base frequency; 10–100 kΩ yields 16.5–26 kHz range
8 (IPH)	Preheat current reference	Sinks 25 µA; sets peak filament current via R_IPH; enables precise preheat current regulation
9 (LO)	Low-side gate driver output	Drives bottom MOSFET gate; logic-level compatible; 50% duty cycle with 1.8 µs deadtime
10 (COM)	Signal and power ground reference	Common return for VCC, LO, DIM, MIN, MAX, FMIN, CPH, VCO, SD, CS; isolated from VS/VB
11 (VCC)	Logic supply input	14 V nominal; internally clamped at 15.6 V; requires external current limiting to sustain regulation
12 (VB)	High-side floating supply	Connects to bootstrap capacitor; supplies HO driver; rated up to 625 V relative to COM
13 (VS)	High-side floating return	Reference for VB and HO; connects to half-bridge midpoint; withstands ±25 V offset from VB
14 (HO)	High-side gate driver output	Drives top MOSFET gate; 600 V-rated; 1.8 µs deadtime with LO to prevent shoot-through
15 (SD)	Shutdown input	Active-high fault latch; >2.0 V disables outputs and enters FAULT mode; clamped at 7.6 V
16 (CS)	Current sense input	Monitors half-bridge current via shunt; 1.2–1.9 V threshold triggers overcurrent shutdown

Key Features

Feature	Design Value
Transformer-less lamp power sensing	Uses phase-control VCO architecture to eliminate bulky current-sense transformers and reduce BOM cost
Closed-loop preheat current control	Regulates filament current via IPH sink and CPH ramp to prevent cold-start stress and extend lamp life
Lamp ignition detection	Identifies successful strike by monitoring CS falling edge after V_CS > V_IPH, then transitions to dim mode
Full lamp fault protection suite	Combines UVLO, overtemperature (165 °C), overcurrent (1.6 V CS threshold), and open-lamp (SD > 2.0 V) detection
Micro-power startup	Draws only 70–330 µA in UVLO mode; enables reliable cold-start without auxiliary bias winding

Applications

Commercial Lighting Ballasts

Industrial Fluorescent Fixtures

Use Scenario: Dimmable T8/T5 electronic ballasts for office ceiling fixtures with 0–10 V or DALI-compatible dimming interfaces.

IC Role / Device Role / Timing Role: Ballast controller and half-bridge driver; manages preheat (1–2 s), ignition (<500 ms), and dimmed steady-state operation (16–26 kHz).

Use Value: Enables flicker-free dimming down to 10% lamp power with consistent color temperature and <1% THD current waveform.

Use Scenario: High-reliability fluorescent lighting in factory floors and warehouses where lamp removal or filament failure must trigger safe shutdown.

IC Role / Device Role / Timing Role: Fault-aware ballast manager; detects open filaments via SD pin and disables outputs within 400 ns of CS overthreshold event.

Use Value: Prevents MOSFET destruction during lamp-end-of-life by halting switching before hard-switching damage occurs.

Hospitality Lighting Systems

Emergency Lighting Units

Use Scenario: Hotel room lighting with smooth 0.5–5 VDC dimming and silent operation during guest occupancy hours.

IC Role / Device Role / Timing Role: Analog dimming controller; translates linear voltage input into precise phase-shifted lamp power without audible noise.

Use Value: Eliminates buzzing artifacts common in TRIAC-dimmable magnetic ballasts by maintaining >16 kHz switching frequency across full dim range.

Use Scenario: Self-contained emergency lighting with battery backup, requiring micro-power startup and brown-out resilience during AC loss.

IC Role / Device Role / Timing Role: Low-quiescent supervisor; draws only 70 µA in UVLO mode and auto-restarts when V_DC > 5.1 V after AC restoration.

Use Value: Extends battery runtime by >35% versus legacy controllers due to sub-100 µA standby current and zener-clamped VCC efficiency.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
IR21593S	Higher VCO frequency range (30–230 kHz); shorter 1.0 µs deadtime; identical pinout and feature set	Better suited for high-frequency ballasts targeting reduced EMI and smaller magnetics	Select IR21593S when operating above 50 kHz or designing for Class B EMI compliance without added filtering
UCC3305N	Single-ended topology only; no integrated high-side driver; requires external level shifter; 100–500 kHz range	Lacks half-bridge integration and lamp fault detection; used in simpler, non-dimming magnetic ballast replacements	Choose UCC3305N only for cost-sensitive, non-dimming retrofit designs where full protection and dimming are not required

Compared with IR21593S and UCC3305N, the IR21592S uniquely balances mid-frequency operation (16–26 kHz), integrated dual-driver safety, and analog dimming fidelity - making it optimal for commercial-grade dimmable fluorescent systems requiring reliability, silence, and lamp longevity.

Availability

IR21592S is available at Aetrix Electronics and suitable for commercial lighting ballasts, industrial fluorescent fixtures, hospitality lighting systems, and emergency lighting units requiring stable component supply and long-term lifecycle support.

Supply support for IR21592S 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 global manufacturing and quality certification to ISO 9001 and IATF 16949.

The IR2159x family was designed specifically for electronic fluorescent ballast applications, integrating control logic, gate drivers, and comprehensive fault protection to replace discrete solutions in energy-efficient lighting systems.

FAQ

What is the function of the CPH pin on the IR21592S?

The CPH pin serves as the preheat timing capacitor node. It charges at a factory-trimmed 0.8–2.1 µA current sourced from IPH, generating a voltage ramp that controls preheat duration. When CPH reaches 4.3–5.7 V, ignition begins; crossing 5.1 V terminates preheat and initiates dim mode. Its voltage is clamped at 10 V to prevent overcharge.

How does the IR21592S detect lamp ignition failure?

Ignition failure is detected when CS pin voltage remains above 1.2–1.9 V for longer than the programmed preheat time, indicating sustained overcurrent without lamp strike. This triggers a fault latch, pulls SD high (>2.0 V), disables HO/LO outputs, and forces entry into FAULT mode with 240 µA quiescent current until reset.

Can the IR21592S operate without a bootstrap capacitor?

No. The VB and VS pins require a bootstrap capacitor to supply the high-side gate driver (HO). Without it, HO cannot generate the 600 V gate drive swing needed for the upper MOSFET. The capacitor must be sized per Infineon's AN-978 guidelines to sustain charge across the 1.8 µs deadtime and switching frequency.

What is the role of the VDC pin in system-level protection?

The VDC pin monitors rectified AC line voltage and enables brown-out protection. When VDC falls below 5.1 V, the IC enters UVLO mode, halting switching and reducing ICC to 70–330 µA. This prevents erratic operation during low-line conditions and ensures clean restart once VDC exceeds 5.1 V and VCC rises above 12.5 V.

IR21592S Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: 16-SOIC (0.154", 3.90mm Width)

Packaging:: Tube

Product Status:: Obsolete

Type:: Ballast Controller

Frequency:: 18kHz ~ 95kHz

Voltage - Supply:: 12V ~ 16.5V

Current - Supply:: 10 mA

Current - Output Source/Sink:: -

Dimming:: Yes

Operating Temperature:: -40°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 16-SOIC

IR21592S FAQ

1.How can I place an order for IR21592S through Aetrix?

Please submit a Request for Quotation (RFQ) for IR21592S on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for IR21592S reliable?

The price and inventory of IR21592S are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR21592S is usually 5 days.

3.What payment methods are accepted for IR21592S?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR21592S transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IR21592S?

IR21592S orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IR21592S order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for IR21592S?

For technical support, including IR21592S datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR21592S requirements.

6.How does Aetrix verify that IR21592S is sourced from the original manufacturer or authorized distributors?

All IR21592S products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that IR21592S meets industry standards.

7.What is the process for return or replacement of IR21592S?

All IR21592S units undergo pre-shipment inspection (PSI). If there is an issue with IR21592S, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The IR21592S part is unused and in its original packaging.

Return procedure for IR21592S:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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