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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > LED Drivers

Infineon Technologies IRS2541PBF

Name: IRS2541PBF
Brand: Infineon Technologies
SKU: IRS2541PBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IRS2541PBF

Manufacturer:: Infineon Technologies

Category:: LED Drivers

Package:: 8-DIP (0.300", 7.62mm)

Datasheet:: IRS2541PBF.pdf

Description:: IC LED DRIVER CTRLR PWM 8DIP

Quantity:: RFQ Add To RFQ list

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Inventory:2,930

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Product details

Overview

IRS2541PBF from Infineon Technologies is a 600 V high-voltage, time-delayed hysteretic buck LED current regulator IC with integrated high- and low-side gate drivers. It regulates constant LED current via 500 mV feedback threshold, features 140 ns deadtime, 15.6 V VCC zener clamp, and supports up to 500 kHz switching in 8-pin SOIC/DIP packages for off-line LED lighting systems.

For engineers reviewing the IRS2541PBF datasheet, IRS2541PBF pinout, IRS2541PBF application, or IRS2541PBF equivalent, key selection criteria include its 600 V floating supply capability, ±2% internal bandgap reference, micropower startup (<500 µA), watchdog timer–enabled open-circuit protection, and PWM dimming compatibility via ENN pin.

Technical Context

The IRS2541PBF implements a self-oscillating, time-delayed hysteretic control architecture-no external timing components required-where average LED current is set by RCS and the 500 mV IFB threshold. Regulation occurs through alternating HO/LO drive pulses governed by VIFB crossing VIFBTH, with fixed 140 ns deadtime preventing shoot-through.

Its dual-supply operation uses VCC (15.6 V clamped) for logic and bias, and VB/VS (up to 600 V) for high-side floating drive. The integrated watchdog timer forces periodic LO-on/HO-off toggling every 20 µs during open-circuit conditions to sustain bootstrap capacitor charge and maintain high-side gate drive integrity.

Key Specifications

Parameter	Value and Actual Design Meaning
V_BS Max	600 V - Enables direct connection to 400 V_RMS AC mains rectified bus without external level-shifting.
V_IFBTH	500 mV ±4% - Sets precise average LED current via I_OUT,AVG = V_IFBTH/R_CS, eliminating calibration drift.
Deadtime	140 ns - Prevents simultaneous conduction of high- and low-side MOSFETs in buck topology under all load/temperature conditions.
f_SW Max	500 kHz - Supports compact magnetics and low-output-ripple designs while maintaining thermal efficiency.
I_QCCUV	<150 µA - Enables reliable start-up from high-impedance auxiliary supplies (e.g., capacitive dropper) without brown-out risk.
t_WD	20 µs - Ensures bootstrap capacitor recharge during open-circuit faults, sustaining high-side drive for >100k-cycle reliability.
V_CLAMP	15.6 V ±1 V - Internally limits VCC to safe operating range; eliminates need for external Zener, simplifying BOM.

Pinout & Package

IRS2541PBF is housed in an industry-standard 8-pin SOIC (surface-mount) or PDIP (through-hole) package, both RoHS-compliant and Pb-free. Pin functions are validated per Infineon's official datasheet PD60293.

Pin/Terminal	Circuit Role	Design Meaning
1 - IFB	Current sense feedback input	Accepts voltage from RCS shunt; 500 mV threshold triggers hysteretic switching transitions.
2 - VCC	Logic supply input	Internally clamped at 15.6 V; powers internal circuitry and enables UVLO (8.0–10.0 V turn-on window).
3 - ENN	Enable/disable control input	Active-high disable: ≥2.5 V disables regulation, forcing HO=low/LO=high for safe shutdown and dimming.
4 - LO	Low-side gate driver output	Sinks/supplies 0.7 A peak; drives synchronous rectifier or low-side switch directly.
5 - VS	High-side floating return	Reference node for HO output; tied to source of high-side MOSFET in half-bridge configuration.
6 - HO	High-side gate driver output	Drives gate of high-side N-channel MOSFET; operates referenced to VS, not COM.
7 - VB	High-side floating supply	Charged via bootstrap diode/capacitor; supplies HO driver at up to 600 V offset above VS.
8 - COM	Signal ground	Common reference for VCC, IFB, ENN, and LO; isolated from power ground in typical buck layout.

Key Features

Feature	Design Value
Time-delayed hysteretic control	Eliminates external oscillator and compensation components; provides inherent stability and current-source behavior without loop tuning.
Integrated watchdog timer	20 µs period ensures bootstrap capacitor recharge during open-circuit faults, enabling fail-safe LED string monitoring.
PWM dimming via ENN pin	Linear dimming response with duty cycle; compatible with MCU GPIO without additional level-shifting or filtering.
600 V high-side floating capability	Supports direct integration into universal-input (90–305 V_AC) offline LED drivers without auxiliary isolation.
Micropower startup	<500 µA ICCUV enables use with high-impedance startup networks (e.g., resistive dropper + Zener), reducing no-load losses.

Applications

Street Lighting Driver

Industrial LED Panel

Use Scenario: Outdoor 150 W LED luminaire powered from 230 V_AC mains with surge immunity and thermal derating.

IC Role / Device Role / Timing Role: Primary buck controller regulating 700 mA constant current; HO/LO drive MOSFETs in non-isolated buck topology with 600 V VB rating.

Use Value: Eliminates need for optocoupler feedback or secondary-side sensing, reducing component count by ≥30% versus flyback-based alternatives.

Use Scenario: 48 V DC-powered factory lighting panel with programmable dimming and fault logging.

IC Role / Device Role / Timing Role: Constant-current regulator with ENN-driven 1–10 kHz PWM dimming; watchdog timer detects broken LED strings.

Use Value: Enables single-chip solution for dimming + open-circuit protection without external comparators or timers.

Architectural Accent Lighting

UV-C Disinfection Module

Use Scenario: Low-profile 24 V input LED strip driver with flicker-free 0–100% dimming and EMI compliance.

IC Role / Device Role / Timing Role: Hysteretic buck controller operating at 350 kHz; uses 140 ns deadtime to minimize switching noise in sensitive audio-visual environments.

Use Value: Achieves <3% current ripple at full scale without output capacitance overdesign, preserving color consistency.

Use Scenario: High-intensity 365 nm UV-C LED array (12 V forward, 2 A avg) requiring precise current control and thermal shutdown coordination.

IC Role / Device Role / Timing Role: Current-regulated buck stage with IFB feedback scaled via precision RCS; ENN pin synchronized to microcontroller safety interlock.

Use Value: Maintains ±2% current accuracy across –25°C to +125°C junction, critical for UV dose repeatability.

Equivalent & Alternatives

The following parts are listed as comparable options for similar LED buck regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
IRS2540PBF	200 V VB max (vs. 600 V); identical pinout, timing, and feature set.	Limited to low-line AC (≤120 V_RMS) or DC-fed designs; unsuitable for universal-input offline drivers.	Select only when input bus voltage remains ≤225 V; reduces cost where 600 V rating is unnecessary.
LM3410XMY/NOPB	36 V max input; requires external MOSFETs; fixed-frequency (1.6 MHz) vs. hysteretic; no integrated high-side driver.	Targeted at low-voltage portable LED systems; lacks open-circuit protection and bootstrap management.	Use for battery-powered designs needing high f_SW; not drop-in replaceable due to topology and voltage mismatch.

Compared with IRS2540PBF and LM3410XMY/NOPB, IRS2541PBF uniquely combines 600 V floating drive, integrated dual gate drivers, and watchdog-enabled open-circuit protection in a single 8-pin IC-enabling robust, low-component-count offline LED drivers without compromising safety or dimming fidelity.

Availability

IRS2541PBF is available at Aetrix Electronics and suitable for street lighting drivers, industrial LED panels, architectural accent lighting, and UV-C disinfection modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for IRS2541PBF 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 IRS254x family is part of Infineon's LED Lighting Control product line, designed specifically for high-reliability, high-efficiency constant-current LED drivers in universal-input AC/DC and DC/DC topologies.

FAQ

What is the minimum bootstrap capacitor value required for reliable IRS2541PBF operation?

The bootstrap capacitor must retain sufficient charge for ≥20 µs between watchdog timer refreshes. Based on typical leakage and load, Infineon specifies 100 nF as the standard value using X7R dielectric and low-ESR construction. Values below 68 nF risk insufficient VBS hold-up under high-temperature or high-VS conditions, leading to HO drive collapse and unregulated current.

Can IRS2541PBF drive a P-channel high-side MOSFET instead of N-channel?

No-IRS2541PBF's HO output is designed exclusively for N-channel high-side MOSFETs requiring gate drive referenced to VS. Its internal level shifter and floating supply architecture assume source-connected VS node. Driving a P-channel device would invert logic polarity and violate the IC's deadtime sequencing, risking shoot-through and device failure.

How does the ENN pin behave during undervoltage lockout (UVLO)?

During UVLO (VCC < 6.5 V), the ENN pin retains its analog input function but the internal logic is disabled-HO and LO remain in their last state (typically both low). No dimming or disable action occurs until VCC exceeds VCCUV+ (≥8.0 V), at which point ENN resumes full functionality with 2.5 V threshold and hysteresis.

Is external compensation required for the IRS2541PBF current control loop?

No external compensation is needed-the time-delayed hysteretic architecture is inherently stable and self-regulating. The control loop relies solely on the IFB voltage crossing the internal 500 mV reference, with delays (tHO,ON/tHO,OFF) and deadtime built into silicon. Adding external RC networks disrupts timing and invalidates the specified current accuracy.

IRS2541PBF Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: 8-DIP (0.300", 7.62mm)

Packaging:: Tube

Product Status:: Obsolete

Type:: DC DC Controller

Topology:: Step-Down (Buck)

Internal Switch(s):: No

Number of Outputs:: 1

Voltage - Supply (Min):: 9V

Voltage - Supply (Max):: 15.6V

Voltage - Output:: -

Current - Output / Channel:: -

Frequency:: 500kHz

Dimming:: PWM

Applications:: -

Operating Temperature:: -25°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 8-PDIP

IRS2541PBF FAQ

1.How can I place an order for IRS2541PBF through Aetrix?

Please submit a Request for Quotation (RFQ) for IRS2541PBF 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 IRS2541PBF reliable?

The price and inventory of IRS2541PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRS2541PBF is usually 5 days.

3.What payment methods are accepted for IRS2541PBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRS2541PBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRS2541PBF?

IRS2541PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRS2541PBF 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 IRS2541PBF?

For technical support, including IRS2541PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRS2541PBF requirements.

6.How does Aetrix verify that IRS2541PBF is sourced from the original manufacturer or authorized distributors?

All IRS2541PBF 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 IRS2541PBF meets industry standards.

7.What is the process for return or replacement of IRS2541PBF?

All IRS2541PBF units undergo pre-shipment inspection (PSI). If there is an issue with IRS2541PBF, 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 IRS2541PBF part is unused and in its original packaging.

Return procedure for IRS2541PBF:

1.Submit a request within 90 days.

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

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