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Infineon Technologies IRS25411PBF
- Part No.:
- IRS25411PBF
- Manufacturer:
- Infineon Technologies
- Category:
- LED Drivers
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
IRS25411PBF.pdf
- Description:
- IC LED DRIVER CTRLR PWM 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,879
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Product details
Overview
IRS25411PBF from Infineon Technologies is a 600 V half-bridge gate driver IC for current-regulated synchronous buck LED drivers, featuring hysteretic current control, 500 mA source / 700 mA sink gate drive outputs, and SO8 package. It enables high-efficiency, non-isolated LED lighting systems operating directly from high-voltage DC rails up to 600 V.
For engineers reviewing the IRS25411PBF datasheet, IRS25411PBF pinout, IRS25411PBF application, or IRS25411PBF equivalent, key selection considerations include bootstrap re-charge timing (tWD = 20.0 μs), IFB feedback threshold (VIFBTH = 455–540 mV), dead time (tDT = 140 ns), and dual UVLO thresholds for VCC (8.0–10.0 V turn-on) and VBS (6.5–8.5 V turn-on).
Technical Context
The IRS25411PBF implements a time-delayed hysteretic current regulation scheme using an internal 500 mV bandgap reference (VIFBTH) compared against shunt-sensed voltage (VIFB). Switching transitions are determined by VIFB crossing VIFBTH with propagation delays (tHO-OFF/tLO-ON = 320 ns; tHO-ON/tLO-OFF = 180 ns) and fixed 140 ns dead time to prevent shoot-through.
It integrates a bootstrap capacitor re-charge timer (tWD = 20.0 μs, tWDCH = 1.0 μs) that forces LO high and HO low periodically to replenish CBOOT - essential for sustaining VBS in continuous high-side conduction. The IC operates without an internal oscillator, so switching frequency (10–500 kHz) depends on input/output voltages, inductance, and load current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VHB Rating | 600 V max floating high-side bias (VB–VS), enabling direct use with 400 V DC bus LED systems |
| Gate Drive Strength | 500 mA source / 700 mA sink at HO/LO, sufficient to drive 10 nF MOSFET gates at ≤500 kHz |
| VIFBTH | 455–540 mV internal reference threshold, sets output current via IOUT(AVG) = VIFBTH/RCS |
| tDT | 140 ns fixed dead time prevents simultaneous HO/LO conduction and MOSFET shoot-through |
| tWD | 20.0 μs bootstrap re-charge wait time ensures reliable VBS maintenance during extended LO-off periods |
| VCCUV+/VCCUV− | 9.0 V turn-on / 7.5 V turn-off hysteresis (1.5 V typical) provides robust start-up and brown-out immunity |
| fS Range | 10–500 kHz variable switching frequency, determined by LBUCK, VIN, VOUT, and ripple design |
Pinout & Package
IRS25411PBF is housed in an SO8 (Small Outline, 8-pin) surface-mount package with standard 1.27 mm pitch and exposed thermal pad (as per Infineon package drawing PG-DSO-8-15).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VCC | Bias supply input | Provides power to logic and low-side driver; clamped internally at 15.6 V (typical) |
| 2 COM | Ground reference | 0 V return for VCC, ENN, IFB, and LO; must be low-inductance connection to PCB ground plane |
| 3 IFB | Current feedback input | Compares sensed shunt voltage against 500 mV reference to regulate LED current hysteretically |
| 4 ENN | Enable/disable input | Active-low logic input; high disables both HO/LO (HO=low, LO=low), low enables operation |
| 5 LO | Low-side gate drive output | Drives N-channel MOSFET source to COM; 700 mA sink capability supports fast turn-off |
| 6 VS | Floating high-side return | Half-bridge node reference for HO; connects to source of high-side MOSFET and bootstrap capacitor negative |
| 7 HO | High-side gate drive output | Drives N-channel MOSFET gate referenced to VS; 500 mA source drives bootstrap-loaded gate |
| 8 VB | High-side floating supply | Connects to positive terminal of bootstrap capacitor (CBOOT); supplies VBS to high-side driver stage |
Key Features
| Feature | Design Value |
|---|---|
| Hysteretic current regulation | Eliminates need for external error amplifier or compensation network; enables simple, stable LED current control |
| Integrated bootstrap re-charge timer | Automatically inserts periodic LO-on pulses (tWDCH = 1.0 μs) to sustain VBS without external circuitry |
| Dual UVLO protection | Independent VCC and VBS under-voltage lockouts prevent erratic switching during power-up or brown-out |
| PWM dimmable interface | Direct PWM signal applied to ENN pin enables precise digital brightness control without analog current scaling |
| Fast propagation delays | 180–320 ns delays ensure tight timing alignment between IFB threshold crossing and gate transitions |
Applications
| Street Lighting Driver | Industrial High-Bay LED Fixture |
|---|---|
|
Use Scenario: Outdoor 150 W LED luminaire powered from 350–400 V DC intermediate bus in smart city infrastructure. IC Role / Device Role / Timing Role: Half-bridge gate driver regulating constant LED current via shunt sensing and hysteretic control; manages ZVS-compatible MOSFET switching. Use Value: Enables >94% system efficiency by replacing freewheeling diode with synchronous MOSFET and eliminating diode conduction loss. |
Use Scenario: 200 W factory ceiling fixture requiring robust thermal performance and 0–10 V/PWM dimming compatibility. IC Role / Device Role / Timing Role: Primary controller for non-isolated buck topology; provides ENN-based PWM dimming interface and fault-safe disable behavior. Use Value: Reduces BOM count by integrating bootstrap management, UVLO, and dead-time control - no external timers or logic required. |
| UV-C Disinfection Module | Architectural Accent Lighting |
|
Use Scenario: High-intensity 275 nm UV-C LED array driven from 400 V DC bus in medical-grade disinfection equipment. IC Role / Device Role / Timing Role: Current-regulated gate driver ensuring precise, ripple-controlled current delivery to sensitive UV LEDs with tight thermal constraints. Use Value: Maintains ±3% current accuracy across line/load variations via 500 mV precision reference and low-drift IFB comparator. |
Use Scenario: Dimmable linear LED tape driver embedded in aluminum extrusion with limited PCB area and thermal mass. IC Role / Device Role / Timing Role: Compact SO8-based buck controller enabling high-density layout; supports analog dimming via IFB voltage offset and PWM via ENN. Use Value: SO8 package with thermal pad allows direct mounting to heatsink, supporting 1.2 A continuous LED current at 70°C ambient. |
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 |
|---|---|---|---|
| IRS25407PBF | Lacks integrated bootstrap re-charge timer; requires external circuitry to maintain VBS during 100% duty cycle | Suitable only for designs with guaranteed minimum off-time or auxiliary VBS supply | Select when cost sensitivity outweighs design simplicity and board space constraints |
| UCC27211D | Non-hysteretic, high-speed dual MOSFET driver (no current regulation or IFB pin); requires external controller | Used in voltage-mode or current-mode controlled buck converters with separate PWM IC | Choose when full flexibility in control architecture (e.g., PID loop, soft-start, fault reporting) is required |
Compared with IRS25407PBF and UCC27211D, the IRS25411PBF uniquely integrates hysteretic current regulation, bootstrap re-charge logic, and dual UVLO - reducing component count and simplifying layout for dedicated LED current regulation, while trading off programmability and multi-topology support.
Availability
IRS25411PBF 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 support, and automotive-grade reliability validation.
Supply support for IRS25411PBF 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 electronics, and industrial control ICs, with global manufacturing and quality certification to ISO/TS 16949 and AEC-Q100 standards.
The IRS25411PBF belongs to Infineon's LED Driver IC product line, designed specifically for high-voltage, non-isolated, current-regulated synchronous buck topologies in commercial and industrial solid-state lighting applications.
FAQ
What is the recommended bootstrap capacitor value and type for IRS25411PBF?
The datasheet specifies a 0.1 µF ceramic capacitor rated for 25 V minimum between VB and VS pins. X7R or C0G dielectrics are preferred for stable capacitance over temperature and voltage. A fast-recovery bootstrap diode (600 V, 1 A, trr < 50 ns) must be used to minimize charge loss during re-charge cycles.
Can IRS25411PBF operate in continuous conduction mode (CCM) only?
Yes - the IRS25411PBF is designed exclusively for CCM operation. Its hysteretic control loop and fixed dead time assume continuous inductor current flow. Discontinuous conduction mode (DCM) causes unstable regulation and potential loss of bootstrap charge due to insufficient LO-on time for CBOOT recharging.
How does the ENN pin behave during enable/disable transitions?
ENN is active-low: logic high disables both HO and LO outputs (HO = low, LO = low), placing the half-bridge in a safe, high-impedance state. Logic low enables normal hysteretic operation. The internal latch ensures glitch immunity, and transition timing follows VCC UVLO release - no additional delay is added beyond startup sequencing.
Is an RC filter required on the IFB pin, and why?
Yes - an RC filter (RF and CF) is mandatory on IFB to suppress noise-induced false triggering from switching node coupling. The filter introduces intentional delay (tRC) that limits maximum switching frequency and controls current ripple magnitude. Typical values are 1 kΩ and 1 nF, yielding ~1 µs time constant aligned with propagation delays.
IRS25411PBF 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):
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
IRS25411PBF FAQ
1.How can I place an order for IRS25411PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for IRS25411PBF 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 IRS25411PBF reliable?
The price and inventory of IRS25411PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRS25411PBF is usually 5 days.
3.What payment methods are accepted for IRS25411PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRS25411PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IRS25411PBF?
IRS25411PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IRS25411PBF 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 IRS25411PBF?
For technical support, including IRS25411PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRS25411PBF requirements.
6.How does Aetrix verify that IRS25411PBF is sourced from the original manufacturer or authorized distributors?
All IRS25411PBF 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 IRS25411PBF meets industry standards.
7.What is the process for return or replacement of IRS25411PBF?
All IRS25411PBF units undergo pre-shipment inspection (PSI). If there is an issue with IRS25411PBF, 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 IRS25411PBF part is unused and in its original packaging.
Return procedure for IRS25411PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
IRS25411PBF Tags
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