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

Infineon Technologies IRS25411SPBF

Name: IRS25411SPBF
Brand: Infineon Technologies
SKU: IRS25411SPBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IRS25411SPBF

Manufacturer:: Infineon Technologies

Category:: LED Drivers

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

Datasheet:: IRS25411SPBF.pdf

Description:: IC LED DRIVER CTRLR PWM 8SOIC

Quantity:: RFQ Add To RFQ list

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Inventory:2,912

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Product details

Overview

IRS25411SPBF from Infineon Technologies is a 600 V half-bridge gate driver IC for current-regulated synchronous buck LED drivers, featuring 500 mA source / 700 mA sink drive capability, hysteretic current control with 500 mV internal reference, and integrated bootstrap re-charge timer (t_WD = 20 μs). It operates up to 500 kHz in non-isolated high-voltage LED lighting systems.

For engineers reviewing the IRS25411SPBF datasheet, IRS25411SPBF pinout, IRS25411SPBF application, or IRS25411SPBF equivalent, key selection criteria include its 600 V floating high-side bias rating, dead-time-controlled HO/LO outputs, logic-level enable input (ENN), PWM dimming support, and SO8 package compatibility with high-voltage PCB layout requirements.

Technical Context

The IRS25411SPBF implements time-delayed hysteretic current regulation using an internal 500 mV bandgap reference (V_IFBTH) and propagation delays (t_HO-OFF = 180 ns, t_LO-ON = 320 ns) to control MOSFET switching sequence. It enforces fixed 140 ns dead time to prevent shoot-through during HO/LO transitions.

Its bootstrap re-charge circuit activates when LO is low for >20 μs, injecting a 1 μs pulse to replenish C_BOOT, ensuring stable V_BS operation without requiring external timing components. UVLO thresholds (V_CCUV+ = 9.0 V typ., V_CCUV- = 7.5 V typ.) guarantee controlled startup and shutdown under varying supply conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
High-side voltage rating	600 V max VS offset - supports direct connection to 400 V DC bus in offline LED drivers
Gate drive strength	500 mA source / 700 mA sink - drives 10 nC gate charge MOSFETs at ≤500 kHz with <50 ns rise/fall times
Feedback reference	500 mV ±10 mV internal bandgap - sets output current via I_OUT(AVG) = 0.5 V / R_CS
Switching frequency range	10–500 kHz hysteretic - no oscillator; frequency varies with V_IN, V_OUT, L_BUCK, and load
Bootstrap re-charge timing	t_WD = 20 μs, t_WDCH = 1 μs - prevents V_BS collapse during extended low-side conduction
Enable input threshold	V_ENNTH+ = 2.7 V (disable), V_ENNTH- = 2.0 V (enable) - supports standard logic-level control with 0.7 V hysteresis
Dead time	140 ns fixed - eliminates cross-conduction risk between HO and LO outputs

Pinout & Package

IRS25411SPBF is housed in an SO8 (Small Outline, 8-pin) package with exposed thermal pad (RoHS-compliant, lead-free plating). Pin 1 is VCC; pin 2 is COM; pin 3 is IFB; pin 4 is ENN; pin 5 is LO; pin 6 is VS; pin 7 is HO; pin 8 is VB. The package supports surface-mount assembly and thermal dissipation up to 0.625 W at T_A ≤ 25°C.

Pin/Terminal	Circuit Role	Design Meaning
VCC (Pin 1)	Bias supply input	14 V nominal supply with UVLO (9.0 V turn-on); powers internal logic and low-side driver
COM (Pin 2)	Ground reference	0 V return for VCC, IFB, ENN, and LO - must be low-inductance path to power ground
IFB (Pin 3)	Hysteretic feedback input	Compares sensed shunt voltage against 500 mV reference to regulate LED current
ENN (Pin 4)	Active-low enable	High = disable (HO low, LO low); low = enable (normal hysteretic operation)
LO (Pin 5)	Low-side gate driver output	Drives M2 gate with 700 mA sink / 500 mA source; referenced to COM
VS (Pin 6)	Floating high-side return	Half-bridge node reference for HO; connects to source of high-side MOSFET M1
HO (Pin 7)	High-side gate driver output	Drives M1 gate with 700 mA sink / 500 mA source; referenced to VS
VB (Pin 8)	High-side floating supply	Connects to bootstrap capacitor (C_BOOT) to generate V_BS for HO operation

Key Features

Feature	Design Value
Integrated bootstrap re-charge timer	Forces periodic LO-on pulse (1 μs) every 20 μs to maintain V_BS without external circuitry
Hysteretic current regulation	Eliminates need for error amplifier, compensation network, or clock - simplifies design for constant-current LED loads
Fixed 140 ns dead time	Hardware-enforced delay prevents simultaneous HO/LO conduction and MOSFET shoot-through
Logic-level enable input (ENN)	Direct interface with microcontrollers or PWM dimming signals without level-shifting
600 V high-side floating capability	Enables direct integration into 400 V DC bus LED drivers without auxiliary isolation or level-shifters

Applications

Street Lighting Driver

Industrial High-Bay LED Fixture

Use Scenario: Outdoor 150 W LED street lamp powered from rectified 230 V AC (≈325 V DC bus) with analog/PWM dimming.

IC Role / Device Role / Timing Role: IRS25411SPBF controls synchronous buck stage to deliver regulated 700 mA LED current with ZVS optimization.

Use Value: Enables >94% efficiency by replacing freewheeling diode with low-R_DS(on) MOSFET and eliminating reverse recovery losses.

Use Scenario: 200 W high-bay fixture in warehouse with 0–10 V dimming interface and thermal foldback protection.

IC Role / Device Role / Timing Role: Acts as current-mode controller for buck converter feeding parallel LED strings; ENN accepts 0–10 V signal via resistor divider.

Use Value: Hysteretic regulation provides fast transient response to dimming commands and maintains ±3% current accuracy across line/load variation.

UV-C Disinfection Module

Architectural Accent Lighting

Use Scenario: Compact 36 V, 1 A UV-C LED array driven from 48 V DC input in portable sterilization device.

IC Role / Device Role / Timing Role: Configured in slave mode to synchronize switching with master controller; IFB senses current through low-side shunt.

Use Value: Eliminates EMI coupling between multiple LED drivers by enforcing synchronized switching edges.

Use Scenario: Dimmable linear LED tape system with 24 V input and 350 mA per segment, requiring flicker-free 1–100% PWM dimming.

IC Role / Device Role / Timing Role: HO/LO outputs drive external N-channel MOSFETs; ENN accepts PWM signal directly for precise duty-cycle control.

Use Value: 500 kHz max switching enables >20 kHz PWM dimming frequency - avoids audible noise and visible flicker.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
IRS25407SPBF	Same SO8 package and pinout; lacks bootstrap re-charge timer (t_WD/t_WDCH), requires external circuit for V_BS maintenance	Suitable only for lower-duty-cycle or lower-frequency designs where C_BOOT leakage is negligible	Select when cost sensitivity outweighs design simplicity and full-duty-cycle robustness
MP6908GJ-Z	Secondary-side synchronous rectifier driver (not a buck controller); no IFB feedback, no hysteretic regulation, no ENN input	Used in isolated flyback/LLC secondary side - not a functional substitute for primary-side current regulation	Not recommended as direct alternative; consider only if redesigning topology to isolated architecture

Compared with IRS25407SPBF, the IRS25411SPBF adds autonomous bootstrap management enabling reliable 100% duty-cycle operation; versus MP6908GJ-Z, it provides complete primary-side current-regulated buck control rather than passive rectification support - making it uniquely suited for non-isolated high-voltage LED drivers.

Availability

IRS25411SPBF is available at Aetrix Electronics and suitable for street lighting drivers, industrial high-bay fixtures, and UV-C disinfection modules requiring stable component supply, long-lifecycle assurance, and automotive-grade reliability validation.

Supply support for IRS25411SPBF 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/TS 16949 and AEC-Q100 standards.

The IRS25411SPBF belongs to Infineon's LED Driver IC product line, designed specifically for high-efficiency, high-voltage, non-isolated constant-current LED drivers operating from rectified AC mains or DC bus inputs.

FAQ

What is the minimum recommended bootstrap capacitor value for IRS25411SPBF?

The datasheet specifies a 0.1 μF ceramic capacitor rated for 25 V minimum at the C_BOOT location (between VB and VS). This value ensures sufficient charge storage to sustain V_BS during worst-case duty cycles while maintaining low ESR for fast re-charge. Larger values (e.g., 0.22 μF) improve margin but increase board area and cost without functional benefit.

Can IRS25411SPBF operate without a bootstrap diode?

No. A 600 V, 1 A fast-recovery bootstrap diode (D_BOOT) with t_rr < 50 ns is mandatory. It charges C_BOOT when LO is high and VS is near COM potential. Omitting D_BOOT prevents V_BS establishment, causing HO to fail after initial startup - the IC will not sustain high-side gate drive.

How does the IRS25411SPBF achieve zero-voltage switching (ZVS)?

ZVS is enabled by the IC's hysteretic control timing and external resonant components (L_BUCK, parasitic capacitances). When LO turns on, the inductor current discharges the high-side MOSFET's output capacitance (C_oss) before HO turns on - reducing V_DS to near zero at turn-on. This behavior depends on inductance value, switching frequency, and load current, and is optimized in the application note AN-1152.

Is the IFB pin compatible with shunt resistors placed on the high-side of the LED string?

No. The IFB input is referenced to COM (0 V), so the current-sense resistor (R_CS) must be placed on the low-side (between LED cathode and COM). High-side sensing would require level-shifting circuitry incompatible with the IRS25411SPBF's internal reference architecture and violates the absolute maximum rating for V_IFB (−0.3 V to V_CC + 0.3 V).

IRS25411SPBF Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

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

Packaging:: Tube

Product Status:: Obsolete

Type:: DC DC Controller

Topology:: Step-Down (Buck)

Internal Switch(s):: No

Number of Outputs:: 1

Voltage - Supply (Min):: 8V

Voltage - Supply (Max):: 16.6V

Voltage - Output:: -

Current - Output / Channel:: -

Frequency:: 500kHz

Dimming:: PWM

Applications:: -

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

IRS25411SPBF FAQ

1.How can I place an order for IRS25411SPBF through Aetrix?

Please submit a Request for Quotation (RFQ) for IRS25411SPBF 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 IRS25411SPBF reliable?

The price and inventory of IRS25411SPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRS25411SPBF is usually 5 days.

3.What payment methods are accepted for IRS25411SPBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRS25411SPBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRS25411SPBF?

IRS25411SPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRS25411SPBF 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 IRS25411SPBF?

For technical support, including IRS25411SPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRS25411SPBF requirements.

6.How does Aetrix verify that IRS25411SPBF is sourced from the original manufacturer or authorized distributors?

All IRS25411SPBF 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 IRS25411SPBF meets industry standards.

7.What is the process for return or replacement of IRS25411SPBF?

All IRS25411SPBF units undergo pre-shipment inspection (PSI). If there is an issue with IRS25411SPBF, 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 IRS25411SPBF part is unused and in its original packaging.

Return procedure for IRS25411SPBF:

1.Submit a request within 90 days.

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

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