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Infineon Technologies IRS2548DSPBF
- Part No.:
- IRS2548DSPBF
- Manufacturer:
- Infineon Technologies
- Category:
- PFC (Power Factor Correction)
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
IRS2548DSPBF.pdf
- Description:
- IC PFC CTRLR CCM 46.5KHZ 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,967
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Product details
Overview
IRS2548DSPBF from Infineon Technologies (formerly International Rectifier) is a fully integrated 600V PFC + half-bridge control IC for isolated LED drivers and SMPS. It combines critical-conduction-mode boost PFC, variable-frequency half-bridge oscillator, programmable over-current protection, internal bootstrap MOSFET, and 15.6V VCC zener clamp. Delivers 500mA HO/LO drive with 1.6µs fixed deadtime and 250µA micropower startup.
For engineers reviewing the IRS2548DSPBF datasheet, IRS2548DSPBF pinout, IRS2548DSPBF application, or IRS2548DSPBF equivalent, key selection criteria include its dual-stage topology support, integrated PFC error amplifier with 4.03V VBUS reference, ZX pin zero-crossing detection, OC/CS fault sensing thresholds, and SOIC-14 package compatibility with high-voltage gate drive requirements.
Technical Context
The IRS2548DSPBF implements a two-stage control architecture: a critical-conduction-mode (CRM) boost PFC pre-regulator with OTA-based error amplifier (COMP pin), and a self-oscillating half-bridge driver with frequency modulation via FMIN resistor. The PFC stage regulates DC bus voltage using VBUS feedback and ZX pin zero-crossing synchronization.
Its system-level protection includes latched OC fault response on CS and OC pins, programmable PFC over-current via RCS, watchdog timer (400µs pulse interval), and UVLO hysteresis (2.0V) on both VCC (12.5V turn-on) and VBS (9.0V turn-on). The internal bootstrap FET supplies VB with 55mA typical sourcing capability at 13.7V turn-on threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Integrated CRM boost PFC + self-oscillating half-bridge controller |
| VOFFSET (VB–VS) | 600V max - supports high-side floating operation up to 600V offset |
| HO/LO Drive Current | 500mA sink/source - directly drives external high- and low-side MOSFET gates |
| Deadtime | 1.6µs fixed - prevents shoot-through in half-bridge power stage |
| VCLAMP | 15.6V zener - protects VCC from overvoltage; requires current-limited supply |
| Startup Current | 250µA - enables low-power auxiliary supply design for standby mode |
| PFC Reference Voltage | 4.03V (VBUS REG) - sets regulated DC bus target for boost stage output |
| Oscillator Frequency | 44.5kHz typical - adjustable via FMIN resistor; supports FM dimming in LED drivers |
Pinout & Package
IRS2548DSPBF is housed in a 14-lead SOIC package with standard JEDEC MS-012AC footprint, creepage/clearance optimized for 600V isolation systems. Pin 1 is ENN (enable/shutdown), Pin 2 is VBUS (PFC feedback), Pin 3 is COMP (PFC error amp output), Pin 4 is ZX (zero-cross detect), Pin 5 is PFC (PFC gate driver), Pin 6 is FMIN (frequency programming), Pin 7 is OC (PFC over-current), Pin 8 is VCC (logic supply), Pin 9 is COM (ground reference), Pin 10 is LO (low-side driver), Pin 11 is CS (half-bridge current sense), Pin 12 is HO (high-side driver), Pin 13 is VS (floating ground), Pin 14 is VB (high-side supply).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 ENN | Logic-level enable/shutdown input | Active-low PWM dimming or burst-mode control; 2.0V rising threshold triggers shutdown |
| 2 VBUS | PFC output voltage feedback | Monitors DC bus; 4.03V internal reference enables precise regulation of boost output |
| 3 COMP | PFC error amplifier output | OTA output driving PFC MOSFET gate; 12.5V swing ensures full enhancement of N-channel FET |
| 4 ZX | Zero-crossing detection input | Synchronizes PFC switching to AC line; 2.0V threshold with 300mV hysteresis rejects noise |
| 5 PFC | PFC gate driver output | Drives boost switch gate; integrated 15.6V clamp protects against gate overvoltage |
| 6 FMIN | Oscillator frequency programming | Resistor sets minimum frequency; 42.2kΩ yields 44.5kHz nominal half-bridge switching |
| 7 OC | PFC over-current sense input | 1.2V threshold triggers latched shutdown; blank time (300ns) avoids false tripping during switching |
| 8 VCC | Logic supply input | Powered via auxiliary winding; internal 15.6V zener limits voltage; 250µA startup reduces no-load loss |
| 9 COM | Ground reference for logic and low-side | Common return for VCC, CS, ENN, COMP, VBUS; separates from high-side VS node |
| 10 LO | Low-side gate driver output | 500mA sink/source; 50ns fall time ensures fast turn-off of low-side MOSFET |
| 11 CS | Half-bridge current sense input | 1.25V threshold detects over-current; 65-event counter enables soft-fault handling before latch |
| 12 HO | High-side gate driver output | 500mA sink/source; referenced to VS; 120ns rise time supports high-frequency switching |
| 13 VS | Floating ground for high-side driver | Reference for HO output; withstands −25V to +600V offset relative to COM |
| 14 VB | High-side floating supply input | Supplies HO driver; internal bootstrap FET charges VB with 55mA typical current |
Key Features
| Feature | Design Value |
|---|---|
| Critical-conduction-mode PFC | Enables >0.95 power factor and <10% THD without requiring complex digital control |
| Integrated bootstrap MOSFET | Eliminates external diode and capacitor in high-side supply path; reduces BOM count and layout area |
| Programmable PFC over-current protection | Adjustable trip level via RCS resistor allows optimization for different boost inductor designs |
| Fixed 1.6µs HO/LO deadtime | Guarantees non-overlapping gate drive timing across temperature and process variation |
| Latch immunity and Class 1C ESD | Withstands 2kV HBM ESD events and resists latch-up under transient overvoltage conditions |
| Micropower startup (250µA) | Reduces auxiliary supply loading during initial power-up; improves light-load efficiency |
Applications
| LED Street Lighting Driver | Industrial AC-DC Power Supply |
|---|---|
Use Scenario: Constant-current LED driver for outdoor luminaires operating from universal AC input (90–265VAC) with high reliability and thermal robustness. IC Role / Device Role / Timing Role: Dual-function controller managing CRM boost PFC stage and resonant half-bridge LLC or LCC output stage. Use Value: Integrated PFC+HB control eliminates separate controllers; 600V VOFFSET supports direct connection to rectified mains; FMIN pin enables analog dimming via optocoupler feedback. | Use Scenario: 100–300W industrial SMPS for PLCs and motor drives requiring high PF, low THD, and wide input range. IC Role / Device Role / Timing Role: Primary-side controller coordinating PFC regulation and isolated half-bridge power conversion with synchronous rectification. Use Value: Single-chip solution reduces component count by >30% vs discrete PFC+HB controllers; CS/OC dual-sensing provides redundant over-current protection. |
| Medical Imaging Power Module | Commercial HVAC Control Power |
Use Scenario: Compact, low-noise auxiliary power supply for CT/MRI detector modules where EMI and reliability are critical. IC Role / Device Role / Timing Role: High-integration controller delivering tightly regulated ±15V/±5V rails with ultra-low standby consumption. Use Value: Micropower startup (250µA) and latch immunity meet IEC 60601-1 safety requirements; SOIC-14 creepage meets reinforced insulation standards. | Use Scenario: Fan-coil unit and VAV box power supply operating continuously in hot, dusty environments with frequent load transients. IC Role / Device Role / Timing Role: Robust PFC+HB controller managing surge-tolerant input and stable 24VDC output for actuator control. Use Value: 15.6V VCC clamp and 600V VOFFSET ensure survival during line surges; ENN pin enables remote ON/OFF and fault signaling to building management system. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PFC + half-bridge control applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IRS2541DSPBF | Single-stage half-bridge only; no integrated PFC control or COMP/ZX pins | Requires external PFC controller; suitable only for systems with pre-regulated DC bus | Select when PFC is handled upstream or omitted; lower cost but higher system complexity |
| UCC28051DR | Standalone CRM PFC controller only; no half-bridge driver or HO/LO outputs | Must be paired with separate half-bridge driver (e.g., UCC27201); no shared fault logic | Select when independent optimization of PFC and HB stages is required; offers higher PFC accuracy but larger footprint |
Compared with IRS2548DSPBF, IRS2541DSPBF lacks PFC functionality and requires external regulation, while UCC28051DR provides superior PFC precision but forces split-controller architecture-making IRS2548DSPBF optimal for compact, cost-sensitive, single-chip isolated LED/SMPS designs.
Availability
IRS2548DSPBF is available at Aetrix Electronics and suitable for isolated LED drivers, industrial AC-DC power supplies, and medical imaging power modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for IRS2548DSPBF 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 global semiconductor leader headquartered in Munich, Germany, specializing in power management, automotive, and industrial control ICs with strong heritage in high-voltage analog integration.
The IRS2548DSPBF belongs to Infineon's legacy IR LED/SMPS control IC family, designed specifically for compact, high-efficiency, single-chip AC-DC conversion in lighting and industrial power applications.
FAQ
What is the purpose of the ZX pin on IRS2548DSPBF?
The ZX (zero-crossing) pin detects AC line zero crossings to synchronize the critical-conduction-mode PFC switching. With a 2.0V threshold and 300mV hysteresis, it ensures accurate timing alignment between the boost switch and input voltage waveform-enabling high power factor and low THD without external timing components.
How does the internal bootstrap MOSFET function in IRS2548DSPBF?
The internal bootstrap MOSFET replaces the external diode and capacitor typically used to charge the high-side driver supply (VB). When VS swings low, the FET conducts to charge CBS; at 13.7V VB turn-on threshold and 55mA typical sourcing, it maintains sufficient gate drive for the HO output without external parts-reducing layout complexity and improving reliability.
Can IRS2548DSPBF support analog dimming in LED drivers?
Yes-via the FMIN pin. Applying a variable DC voltage (1.9–2.1V nominal) or modulating frequency through an optocoupler-connected resistor adjusts the half-bridge oscillator frequency, enabling smooth analog dimming without PWM flicker. This is confirmed in the functional block diagram and oscillator characteristics table (fOSCRUN = 44.5kHz typical, adjustable).
What protection features prevent latch-up during overvoltage events?
IRS2548DSPBF incorporates Class I latch-up immunity per JESD78, 15.6V VCC zener clamping, and dual-threshold UVLO (12.5V turn-on / 10.5V turn-off) with 2.0V hysteresis. These features-verified in qualification testing-prevent destructive latch-up during transient overvoltage, ensuring safe recovery after line surges or startup faults.
IRS2548DSPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Mode:
- Continuous Conduction (CCM)
- Frequency - Switching:
- 42.5kHz ~ 46.5kHz
- Current - Startup:
- 250 µA
- Voltage - Supply:
- 11.5V ~ 16.6V
- Operating Temperature:
- -25°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
IRS2548DSPBF FAQ
1.How can I place an order for IRS2548DSPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for IRS2548DSPBF 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 IRS2548DSPBF reliable?
The price and inventory of IRS2548DSPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRS2548DSPBF is usually 5 days.
3.What payment methods are accepted for IRS2548DSPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRS2548DSPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IRS2548DSPBF?
IRS2548DSPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IRS2548DSPBF 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 IRS2548DSPBF?
For technical support, including IRS2548DSPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRS2548DSPBF requirements.
6.How does Aetrix verify that IRS2548DSPBF is sourced from the original manufacturer or authorized distributors?
All IRS2548DSPBF 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 IRS2548DSPBF meets industry standards.
7.What is the process for return or replacement of IRS2548DSPBF?
All IRS2548DSPBF units undergo pre-shipment inspection (PSI). If there is an issue with IRS2548DSPBF, 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 IRS2548DSPBF part is unused and in its original packaging.
Return procedure for IRS2548DSPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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