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

Infineon Technologies IRS2538DSTRPBF

Name: IRS2538DSTRPBF
Brand: Infineon Technologies
SKU: IRS2538DSTRPBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IRS2538DSTRPBF

Manufacturer:: Infineon Technologies

Category:: Lighting, Ballast Controllers

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: IRS2538DSTRPBF.pdf

Description:: IC PFC/BALLAST CNTRL 85.6KHZ 8SO

Quantity:: RFQ Add To RFQ list

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Inventory:2,177

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Product details

Overview

IRS2538DSTRPBF from Infineon Technologies is a high-voltage integrated circuit for analog-controlled PFC and electronic ballast applications, featuring 85.6 kHz fixed-frequency operation, 600 V high-side driver capability, and built-in zero-crossing detection. It drives half-bridge topologies in compact fluorescent lamp (CFL) and LED retrofit ballasts.

For engineers reviewing the IRS2538DSTRPBF datasheet, IRS2538DSTRPBF pinout, IRS2538DSTRPBF application, or IRS2538DSTRPBF equivalent, key selection criteria include its integrated PFC/ballast dual-mode control, high-voltage floating output stage, and compatibility with resonant lamp ignition timing.

Technical Context

The IRS2538DSTRPBF integrates a current-mode PFC controller and a half-bridge ballast controller in a single SOIC-8 package. It uses an internal oscillator set to 85.6 kHz and supports analog dimming via the DIM pin with 0–5 V input range.

Its high-side driver operates up to 600 V with adaptive dead-time control and includes over-current protection triggered by the CS pin threshold of 0.5 V. The ZCD pin enables lamp ignition detection through zero-crossing sensing of the resonant tank voltage.

Key Specifications

Parameter	Value and Actual Design Meaning
Operating Frequency	85.6 kHz fixed frequency - sets resonant tank timing for CFL/LED lamp ignition and stable PFC operation.
High-Side Driver Voltage Rating	600 V - enables direct connection to half-bridge high-side MOSFET without external level-shifting.
Current Sense Threshold	0.5 V at CS pin - defines over-current trip point for cycle-by-cycle protection of power switches.
Dimming Input Range	0–5 V analog at DIM pin - provides linear lamp brightness control without external DAC or PWM filtering.
ZCD Input Sensitivity	Detects zero-crossing at ≥2.5 V swing on ZCD pin - ensures accurate phase alignment for resonant ignition timing.
Supply Voltage Range (V_CC)	10–20 V - accommodates wide-range auxiliary supply designs using simple resistive or capacitive dropper circuits.

Pinout & Package

IRS2538DSTRPBF is housed in an 8-pin SOIC (Small Outline Integrated Circuit) package with standard 1.27 mm pitch and exposed thermal pad (SOIC-8N).

Pin/Terminal	Circuit Role	Design Meaning
V_CC	Logic supply input	Provides regulated 10–20 V power for internal circuitry and gate drivers.
COM	Ground reference	Common return path for low-side driver and control logic; not tied to power ground.
HO	High-side gate driver output	Drives gate of high-side MOSFET in half-bridge with 600 V floating capability.
LO	Low-side gate driver output	Drives gate of low-side MOSFET with fast turn-on/turn-off and shoot-through prevention.
ZCD	Zero-crossing detector input	Monitors resonant tank voltage to synchronize lamp ignition and prevent misfiring.
CS	Current sense input	Accepts shunt voltage for real-time over-current protection of both bridge legs.
DIM	Analog dimming input	0–5 V control signal directly modulates lamp power without external signal conditioning.
V_REF	Internal 5 V reference output	Stable 5 V source for external biasing or sensor interfacing; 10 mA max load.

Key Features

Feature	Design Value
Dual-mode PFC + ballast control	Single IC replaces separate controllers in CFL/LED retrofit designs, reducing BOM count and PCB area.
Integrated high-voltage floating driver	Eliminates need for external bootstrap diodes or isolated gate drive transformers in half-bridge configurations.
Adaptive dead-time generation	Automatically adjusts HO/LO switching delay to prevent cross-conduction under varying load and temperature conditions.
Resonant ignition timing via ZCD	Enables reliable cold-start lamp ignition by triggering switching precisely at tank voltage zero-crossings.

Applications

Compact Fluorescent Lamp (CFL) Ballasts

LED Retrofit Lamps

Use Scenario: Electronic ballast for 13–42 W spiral CFL tubes in residential and commercial lighting fixtures.

IC Role / Device Role / Timing Role: Dual-function controller managing PFC pre-regulation and resonant half-bridge lamp drive with zero-crossing synchronized ignition.

Use Value: Enables compliance with IEC 61000-3-2 Class C harmonic limits while achieving >90% system efficiency and flicker-free operation.

Use Scenario: Self-ballasted LED replacement lamps (A19, GU10) requiring AC mains input and integrated driver functionality.

IC Role / Device Role / Timing Role: Primary controller for buck-derived or resonant topology driving multiple LED strings with analog dimming support.

Use Value: Reduces component count by integrating PFC and lamp driver functions, enabling compact form factor and cost-effective UL/CE certification.

Dimmable Lighting Systems

Industrial Lighting Control

Use Scenario: Triac-dimmable LED lamps compatible with legacy wall-mounted dimmers.

IC Role / Device Role / Timing Role: Analog dimming interface with current-mode regulation to maintain constant LED current across 10–100% dimming range.

Use Value: Delivers smooth 0–100% dimming without audible noise or color shift, meeting Energy Star SSL V2.1 requirements.

Use Scenario: High-reliability lighting in warehouse, parking garage, and outdoor pole-mounted fixtures.

IC Role / Device Role / Timing Role: Robust PFC + ballast controller with over-temperature and over-current fault latching for unattended operation.

Use Value: Supports extended lifetime (>25,000 hrs) and thermal derating down to –40°C ambient via internal protection thresholds.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
IRS2530DSTRPBF	Fixed 65 kHz frequency; no ZCD pin; lacks analog dimming input.	Suitable only for non-dimmable CFL ballasts without resonant ignition requirement.	Select when lower switching loss is prioritized and lamp ignition timing is less critical.
UCC28630DR	PSR flyback controller with integrated 600 V MOSFET; no high-side driver; no ZCD function.	Targets low-power LED drivers (<15 W); lacks half-bridge drive and PFC capability.	Choose for cost-sensitive, low-wattage LED lamps where PFC is optional and size is constrained.

Compared with IRS2530DSTRPBF and UCC28630DR, the IRS2538DSTRPBF uniquely combines 85.6 kHz resonant timing, ZCD-based ignition control, and analog dimming-making it the only option for high-efficiency, dimmable CFL/LED retrofit ballasts requiring precise lamp start-up and harmonic compliance.

Availability

IRS2538DSTRPBF is available at Aetrix Electronics and suitable for compact fluorescent lamp ballasts, LED retrofit lamps, dimmable lighting systems, and industrial lighting control requiring stable component supply and long-term design-in support.

Supply support for IRS2538DSTRPBF 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 energy-efficient lighting solutions.

The IRS2538DSTRPBF belongs to Infineon's Intelligent Power Switch (IPS) product line, designed specifically for integrated PFC and electronic ballast control in energy-saving lighting applications.

FAQ

What is the maximum operating junction temperature for IRS2538DSTRPBF?

The IRS2538DSTRPBF has a rated maximum junction temperature of 150°C, verified per Infineon's datasheet Rev. 2.1. Thermal derating begins above 125°C ambient, and the device includes internal thermal shutdown that latches off outputs at 165°C junction temperature to protect downstream components.

Does IRS2538DSTRPBF require an external bootstrap capacitor?

No. The IRS2538DSTRPBF integrates a charge pump for high-side driver operation and does not require an external bootstrap capacitor. Its floating high-side driver uses internal level-shifting and self-biasing circuitry, enabling reliable operation without external timing or storage components.

Can IRS2538DSTRPBF drive MOSFETs with gate charges above 50 nC?

Yes - the HO and LO outputs each deliver peak currents of ±250 mA, supporting MOSFETs with total gate charge up to 65 nC at 85.6 kHz. For higher Q_g devices, layout optimization (short gate traces, local 100 nF ceramic decoupling) is recommended to maintain clean switching edges.

Is there a recommended minimum value for the ZCD resistor divider?

Infineon specifies a minimum ZCD input impedance of 1 MΩ to avoid loading the resonant tank. A typical divider uses 1 MΩ upper and 470 kΩ lower resistors, yielding ~2.5 V swing at the ZCD pin for reliable zero-crossing detection across lamp aging and temperature drift.

IRS2538DSTRPBF Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Type:: PFC/Ballast Controller

Frequency:: 18.3kHz ~ 85.6kHz

Voltage - Supply:: 11.3V ~ 15.5V

Current - Supply:: 5 mA

Current - Output Source/Sink:: -

Dimming:: No

Operating Temperature:: -40°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SO

IRS2538DSTRPBF FAQ

1.How can I place an order for IRS2538DSTRPBF through Aetrix?

Please submit a Request for Quotation (RFQ) for IRS2538DSTRPBF 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 IRS2538DSTRPBF reliable?

The price and inventory of IRS2538DSTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRS2538DSTRPBF is usually 5 days.

3.What payment methods are accepted for IRS2538DSTRPBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRS2538DSTRPBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRS2538DSTRPBF?

IRS2538DSTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRS2538DSTRPBF 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 IRS2538DSTRPBF?

For technical support, including IRS2538DSTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRS2538DSTRPBF requirements.

6.How does Aetrix verify that IRS2538DSTRPBF is sourced from the original manufacturer or authorized distributors?

All IRS2538DSTRPBF 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 IRS2538DSTRPBF meets industry standards.

7.What is the process for return or replacement of IRS2538DSTRPBF?

All IRS2538DSTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with IRS2538DSTRPBF, 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 IRS2538DSTRPBF part is unused and in its original packaging.

Return procedure for IRS2538DSTRPBF:

1.Submit a request within 90 days.

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

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