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Infineon Technologies IRS2540SPBF
- Part No.:
- IRS2540SPBF
- Manufacturer:
- Infineon Technologies
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
IRS2540SPBF.pdf
- Description:
- IC LED DRIVER CTRLR PWM 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,204
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
IRS2540SPBF from Infineon Technologies is a 200 V high-voltage, high-frequency buck LED regulator control IC with integrated 8-pin SOIC package. It implements time-delayed hysteretic current regulation using a ±2% on-chip bandgap reference (500 mV IFB threshold), 140 ns deadtime, and dual gate drivers (HO/LO) for external MOSFETs in constant-current LED lighting systems.
For engineers reviewing the IRS2540SPBF datasheet, IRS2540SPBF pinout, IRS2540SPBF application, or IRS2540SPBF equivalent, key selection criteria include its 200 V high-side floating supply rating, micropower startup (<500 µA), 15.6 V VCC zener clamp, PWM dimmability via ENN pin, and watchdog timer–enabled open-circuit protection for reliable LED driver design.
Technical Context
The IRS2540SPBF operates as a self-oscillating, time-delayed hysteretic buck controller-eliminating need for external frequency-setting components. Regulation is achieved by comparing IFB voltage against a 500 mV internal reference, with programmable delays (tHO,ON = 320 ns, tHO,OFF = 180 ns) and fixed 140 ns deadtime to prevent shoot-through.
It integrates a low-impedance high-side driver (HO) and low-side driver (LO), both capable of driving external N-channel MOSFETs, plus an ENN pin that supports analog/digital PWM dimming and non-latched shutdown. A 20 µs watchdog timer forces periodic LO activation to maintain bootstrap capacitor charge during open-circuit conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VB Rating | 200 V max floating supply - enables direct operation from 170 VRMS AC rectified bus without intermediate DC-DC stage |
| IFB Threshold | 500 mV ±40 mV - sets average LED current via external RCS resistor: ILED,avg = 0.5 V / RCSS |
| Deadtime | 140 ns - prevents simultaneous conduction of high- and low-side MOSFETs in buck topology |
| VCC Clamp | 15.6 V zener - protects internal circuitry; requires external VCC supply ≤15.6 V or current-limited source |
| Startup Current | <500 µA - allows direct startup from high-impedance bias networks, reducing auxiliary supply complexity |
| Max Switching Freq | 500 kHz - supports compact magnetics and low-output-ripple designs in space-constrained LED drivers |
| Watchdog Period | 20 µs - ensures bootstrap capacitor recharge during open-circuit fault, sustaining HO drive capability |
Pinout & Package
IRS2540SPBF is housed in an 8-lead SOIC package (body width 3.9 mm, pitch 1.27 mm), thermally rated for 200 °C/W junction-to-ambient under still-air conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: IFB | Current feedback input | Monitors LED current via RCS resistor; triggers switching transitions when crossing 500 mV threshold |
| 2: VCC | IC power supply | Internal 15.6 V zener-clamped input; must be supplied with current-limited source ≥9 V to exit UVLO |
| 3: ENN | Enable/disable control | Logic-high (>2.5 V) disables regulation: HO → low, LO → high; supports PWM dimming at kHz rates |
| 4: LO | Low-side gate driver output | Drives N-MOSFET source-connected to COM; sink/source capability supports fast turn-on/off of synchronous rectifier |
| 5: VS | High-side floating return | Reference node for HO output; tied to switch-node of buck inductor/MOSFET; withstands dV/dt up to ±50 V/ns |
| 6: HO | High-side gate driver output | Drives N-MOSFET gate referenced to VS; operates from VB supply generated by external bootstrap network |
| 7: VB | High-side floating supply | Input to high-side driver; charged via external bootstrap diode/capacitor from VS node during LO conduction |
| 8: COM | Signal and power ground | Common reference for VCC, IFB, ENN, and LO; must be low-impedance connection to minimize noise coupling into feedback path |
Key Features
| Feature | Design Value |
|---|---|
| Hysteretic current regulation | Eliminates external oscillator and compensation components; provides inherent stability and fast transient response in LED current loop |
| Integrated watchdog timer | 20 µs forced LO activation prevents bootstrap capacitor discharge during open-circuit faults, enabling fail-safe LED string detection |
| PWM dimming interface | Direct ENN pin control with linear dimming ratio; no external logic required-compatible with MCU GPIO or dedicated dimming ICs |
| 140 ns programmable deadtime | Hardware-enforced delay between HO/LO transitions prevents shoot-through in high-speed buck topologies with fast-switching MOSFETs |
| Micropower UVLO startup | Starts regulation with <500 µA VCC current-enables use of high-value resistive bias networks from rectified AC line |
Applications
| Architectural LED Drivers | Industrial LED Luminaires |
|---|---|
Use Scenario: High-bay lighting fixtures operating directly from 230 VAC mains with isolated or non-isolated buck topology. IC Role / Device Role / Timing Role: Primary current regulation controller implementing time-delayed hysteretic loop with automatic open-circuit recovery. Use Value: Enables single-stage AC-DC LED drivers with >90% efficiency, eliminating transformer and secondary-side feedback circuitry. | Use Scenario: Dust- and moisture-resistant outdoor streetlights requiring robust overvoltage and open-load protection. IC Role / Device Role / Timing Role: Fault-tolerant LED current controller with watchdog timer and 200 V high-side rating for direct rectified bus operation. Use Value: Sustains stable LED output during partial string failure and prevents thermal runaway in multi-string configurations. |
| Commercial Downlight Modules | UV-C Sterilization Systems |
Use Scenario: Slim-profile recessed downlights with tight thermal constraints and analog/PWM dimming requirements. IC Role / Device Role / Timing Role: Compact SOIC-based buck controller providing precise 1–10 V or 0–10 V dimming compatibility via ENN pin. Use Value: Achieves flicker-free dimming down to 1% light output with minimal BOM count and no external op-amps or DACs. | Use Scenario: Pulsed UV-C LED arrays used in medical surface disinfection equipment requiring precise current pulse control. IC Role / Device Role / Timing Role: Fast-response current regulator supporting burst-mode operation with microsecond-level timing accuracy. Use Value: Delivers repeatable 350 mA–700 mA pulses at 1–5 kHz with <±2% current accuracy, critical for germicidal dose consistency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED buck regulator control applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IRS2541SPBF | 600 V high-side rating vs. 200 V; identical pinout, timing, and functional blocks | Required for universal-input (90–265 VAC) or 400 VDC bus applications; higher voltage stress on bootstrap components | Select when input bus exceeds 250 VDC or system requires wider input range compliance |
| LM3410XMY/NOPB | 36 V max input; integrated 1.5 A MOSFET; no high-side driver or bootstrap support | Limited to low-voltage DC-powered LED modules; lacks open-circuit watchdog and HV floating capability | Choose only for battery- or 24 VDC-powered portable lighting where size and integration outweigh HV performance needs |
Compared with IRS2541SPBF, the IRS2540SPBF offers lower cost and reduced layout complexity for 200 V-class LED drivers, while LM3410XMY/NOPB trades HV capability for monolithic integration-making it unsuitable for mains-connected designs but viable for low-voltage embedded lighting.
Availability
IRS2540SPBF is available at Aetrix Electronics and suitable for architectural LED drivers, industrial luminaires, commercial downlights, and UV-C sterilization systems requiring stable component supply and long-term production continuity.
Supply support for IRS2540SPBF 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 LED control solutions.
The IRS254x family targets cost-sensitive, high-reliability LED lighting applications requiring integrated protection, dimming, and bootstrap-based high-side drive-designed specifically for non-isolated buck regulators in mains-connected luminaires.
FAQ
What is the minimum bootstrap capacitor value recommended for IRS2540SPBF?
The datasheet specifies a typical value of 100 nF for CBOOT. This ensures sufficient charge retention over the 20 µs watchdog interval under worst-case load and temperature conditions. Smaller values risk premature VBS collapse, causing HO drive failure and increased MOSFET conduction losses. Layout parasitics and diode reverse recovery must also be considered when selecting actual component ratings.
Can IRS2540SPBF drive a P-channel high-side MOSFET?
No. IRS2540SPBF's HO output is designed exclusively for N-channel MOSFETs requiring a floating gate drive referenced to VS. Its architecture assumes high-side switching with source tied to VS and drain to VBUS, necessitating bootstrap-based gate voltage boosting. Driving a P-channel device would require inverted logic, different level-shifting, and loss of the integrated watchdog and deadtime functions.
How does the ENN pin behave during undervoltage lockout (UVLO)?
During UVLO (VCC < 6.5 V), the ENN pin is inactive-the IC remains fully disabled regardless of ENN voltage level. Only after VCC rises above VCCUV+ (9.0 V typ.) does ENN become functional for dimming or disable control. This ensures predictable startup behavior and prevents erratic regulation during brownout conditions.
Is external RC compensation required for stable current regulation?
No. The IRS2540SPBF uses intrinsic time-delayed hysteretic control with no external compensation network. Stability is inherent to the topology-no loop gain, phase margin, or frequency compensation components are needed. The only external timing elements are the bootstrap capacitor and optional RC filter on IFB for noise immunity, per application note AN-1117.
IRS2540SPBF 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):
- 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:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
IRS2540SPBF FAQ
1.How can I place an order for IRS2540SPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for IRS2540SPBF 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 IRS2540SPBF reliable?
The price and inventory of IRS2540SPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRS2540SPBF is usually 5 days.
3.What payment methods are accepted for IRS2540SPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRS2540SPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IRS2540SPBF?
IRS2540SPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IRS2540SPBF 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 IRS2540SPBF?
For technical support, including IRS2540SPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRS2540SPBF requirements.
6.How does Aetrix verify that IRS2540SPBF is sourced from the original manufacturer or authorized distributors?
All IRS2540SPBF 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 IRS2540SPBF meets industry standards.
7.What is the process for return or replacement of IRS2540SPBF?
All IRS2540SPBF units undergo pre-shipment inspection (PSI). If there is an issue with IRS2540SPBF, 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 IRS2540SPBF part is unused and in its original packaging.
Return procedure for IRS2540SPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
IRS2540SPBF Tags
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BCR402RE6327HTSA1
Infineon Technologies
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BCR430UXTSA2
Infineon Technologies
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BCR420UE6433HTMA1
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BCR420UE6327HTSA1
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BCR421UE6327HTSA1
Infineon Technologies
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CL2N8-G
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BCR420UFD-7
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BCR421UFD-7
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