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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > PFC (Power Factor Correction)

Infineon Technologies IRS2548DSTRPBF

Name: IRS2548DSTRPBF
Brand: Infineon Technologies
SKU: IRS2548DSTRPBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IRS2548DSTRPBF

Manufacturer:: Infineon Technologies

Category:: PFC (Power Factor Correction)

Package:: 14-SOIC (0.154", 3.90mm Width)

Datasheet:: IRS2548DSTRPBF.pdf

Description:: IC PFC CTRLR CCM 46.5KHZ 14SOIC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

IRS2548DSTRPBF 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, programmable over-current protection, variable-frequency oscillator, fixed 1.6 µs HO/LO deadtime, and internal bootstrap MOSFET in a single 14-lead SOIC package. Used in constant-current LED ballasts requiring high power factor (>0.97) and low THD.

For engineers reviewing the IRS2548DSTRPBF datasheet, IRS2548DSTRPBF pinout, IRS2548DSTRPBF application, or IRS2548DSTRPBF equivalent, key selection criteria include V_OFFSET = 600 V, I_O(HO/LO) = 500 mA typ., t_ON/t_OFF = 120 ns / 50 ns, PFC OCP programmability via CS pin, and micropower startup (250 µA).

Technical Context

The IRS2548DSTRPBF implements a dual-loop control architecture: a transconductance OTA-based PFC error amplifier (COMP pin) regulates DC bus voltage via ZX and OC feedback, while a separate variable-frequency oscillator governs half-bridge switching with frequency modulation capability via FMIN resistor. The PFC stage operates exclusively in critical conduction mode (CrCM), eliminating audible noise and enabling high efficiency at light loads.

Its high-side driver uses an internal bootstrap MOSFET with 13.7 V turn-on threshold and 35–55 mA VB sourcing capability into 0.1 µF capacitor, enabling self-biased operation without external charge pump. Protection includes latched PFC over-voltage (VBUS > 4.3 V), cycle-by-cycle CS-pin over-current (1.25 V threshold), and ENN-driven non-latched shutdown (2.0 V rising threshold).

Key Specifications

Parameter	Value and Actual Design Meaning
V_OFFSET	600 V - Enables direct drive of high-side MOSFETs in bridge topologies up to 600 V DC bus.
I_O(HO/LO)	500 mA / 500 mA - Sustained gate drive current supports fast turn-on of 1–2 nF gate capacitances at full load.
t_ON/t_OFF	120 ns / 50 ns - Ensures minimal switching losses in resonant half-bridge LED drivers operating above 40 kHz.
Deadtime	1.6 µs fixed - Prevents shoot-through in half-bridge by guaranteeing minimum off-time between HO and LO transitions.
PFC Mode	Critical conduction mode (CrCM) - Delivers >0.97 PF and <10% THD without requiring input EMI filter oversizing.
Startup Current	250 µA - Allows direct VCC biasing from high-impedance auxiliary winding, reducing standby losses.
V_CLAMP	15.6 V zener - Internally clamps VCC to protect logic circuitry; requires external supply impedance >1 kΩ to avoid regulation failure.

Pinout & Package

IRS2548DSTRPBF is housed in a 14-lead SOIC package with standard JEDEC MS-012AC footprint (5.3 mm width, 1.27 mm pitch). Pin 1 is marked with dot; pin 14 is VCC; pin 7 is shared FMIN/OC node.

Pin/Terminal	Circuit Role	Design Meaning
1 (ENN)	Enable/Shutdown Input	Logic-level active-low enable; 2.0 V rising threshold enables PWM dimming interface or burst-mode control.
2 (VBUS)	PFC Bus Voltage Sense	Direct connection to boost output; internal 4.03 V reference enables precise DC bus regulation.
4 (COMP)	PFC Error Amplifier Output	OTA output driving external compensation network; ±30 µA sourcing/sinking defines loop stability margin.
5 (ZX)	Zero-Cross Detection Input	Senses inductor current zero-crossing to trigger CrCM switching; 2.0 V threshold with 300 mV hysteresis.
6 (OC)	PFC Over-Current Sense	Current-sense comparator input; 1.2 V threshold triggers latched shutdown on primary-side over-current event.
7 (FMIN)	Minimum Frequency Set	Resistor-programmable pin sets lowest oscillator frequency (42.5–46.5 kHz range); also doubles as OC fault flag.
8 (PFC)	PFC Gate Driver Output	Drives boost switch gate; 500 mA sink/source supports 1 Ω gate resistor with <100 ns rise/fall.
9 (HO)	High-Side Bridge Driver	Floats with VS node; drives upper MOSFET gate referenced to VB; 120 ns rise time ensures clean turn-on.
10 (VS)	Half-Bridge Source Node	Switching node connection point; rated for -25 V to +600 V offset; dV/dt immunity up to 50 V/ns.
11 (VB)	High-Side Floating Supply	Bootstrap-supplied rail for HO driver; internal clamp limits to 15.6 V; 55 mA sourcing sustains 0.1 µF bootstrap cap.
12 (VCC)	Logic Supply Input	15.6 V zener-clamped input; 250 µA UVLO current enables low-loss auxiliary winding biasing.
13 (LO)	Low-Side Bridge Driver	GND-referenced output; 500 mA drive strength matches HO for symmetrical half-bridge timing.
14 (COM)	Power Ground Reference	Common return for CS, ENN, COMP, and LO; must be star-connected to minimize noise coupling into analog circuits.

Key Features

Feature	Design Value
Critical-conduction-mode PFC	Enables >0.97 power factor and <10% THD without complex digital control or large input filters.
Integrated bootstrap MOSFET	Eliminates need for external diode/capacitor charge pump; reduces BOM count and layout area in compact LED drivers.
Programmable PFC over-current protection	CS pin threshold (1.25 V) combined with external shunt allows precise primary-side current limiting across line/load variations.
Fixed 1.6 µs HO/LO deadtime	Guarantees shoot-through immunity independent of temperature, supply voltage, or process variation.
Micropower startup (250 µA)	Permits direct VCC bias from high-impedance auxiliary winding, cutting no-load power below 0.3 W in Class VI designs.

Applications

Isolated LED Drivers

Constant-Voltage SMPS

Use Scenario: High-efficiency streetlight driver delivering 100 W @ 36 V/2.8 A with universal AC input (90–264 VAC).

IC Role / Device Role / Timing Role: PFC controller + half-bridge gate driver; manages CrCM boost pre-regulator and LLC resonant tank timing via FMIN modulation.

Use Value: Achieves >92% system efficiency and <10% THD while meeting IEC 61000-3-2 Class C harmonic limits.

Use Scenario: 65 W laptop adapter with active PFC and quasi-resonant flyback-derived half-bridge topology.

IC Role / Device Role / Timing Role: Dual-function controller coordinating boost PFC stage and secondary-side synchronous rectification timing via LO output.

Use Value: Reduces component count by integrating PFC and HB control, enabling 12 mm board height compliance.

Industrial LED Lighting

UV-C Disinfection Power Supplies

Use Scenario: 150 W high-bay fixture using 48 V LED string with 0–10 V dimming interface.

IC Role / Device Role / Timing Role: ENN pin accepts 0–10 V analog signal to modulate PFC frequency and HB duty cycle simultaneously for smooth dimming.

Use Value: Eliminates flicker across 1–100% dimming range without secondary microcontroller or DAC.

Use Scenario: 30 W germicidal lamp driver powering 254 nm UV-C LEDs requiring precise constant-current regulation.

IC Role / Device Role / Timing Role: COMP pin closed-loop regulates LED current via secondary-side optocoupler feedback; ZX pin ensures CrCM stability under rapid thermal transients.

Use Value: Maintains ±2% current accuracy over –20°C to +70°C ambient without calibration.

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
IRS2541DSTRPBF	Lacks integrated bootstrap MOSFET; requires external bootstrap diode and capacitor; identical PFC and HB control architecture.	Better suited for designs where layout space permits discrete bootstrap components and higher V_BS ripple is acceptable.	Select when cost sensitivity outweighs layout simplification; same pinout except missing internal FET.
UCC28070DR	Dual-phase interleaved CCM PFC only; no half-bridge driver; requires external HB controller (e.g., UCC27200) and coordination logic.	Targeted at high-power (>250 W) industrial supplies needing >98% PF and lower EMI via phase interleaving.	Choose only if CCM PFC performance and >200 W output are mandatory; adds design complexity and BOM count.

Compared with IRS2541DSTRPBF, the IRS2548DSTRPBF saves one diode and one capacitor while maintaining identical protection and timing specs; versus UCC28070DR, it trades higher PF for integration simplicity and lower system cost below 150 W.

Availability

IRS2548DSTRPBF is available at Aetrix Electronics and suitable for isolated LED drivers, constant-voltage SMPS, and industrial LED lighting requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for IRS2548DSTRPBF 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 emphasis on energy efficiency and reliability.

The IRS2548DSTRPBF belongs to Infineon's LED & SMPS Control IC product line, engineered specifically for highly integrated, cost-sensitive AC-DC conversion in lighting and power supply applications demanding CrCM PFC and robust half-bridge timing.

FAQ

What is the maximum allowable dV/dt on the VS pin?

The VS pin supports a maximum dV/dt of ±50 V/ns under all operating conditions, verified per JEDEC JESD22-A115. This rating ensures reliable operation during fast-switching events in resonant topologies without false triggering of the high-side level shifter. Exceeding this rate may cause erratic HO output behavior or latch-up.

Can the IRS2548DSTRPBF drive GaN HEMTs directly?

No - the IRS2548DSTRPBF's HO/LO outputs are optimized for silicon MOSFET gate drive (500 mA peak, 120 ns rise time) and lack the sub-10 ns propagation delay or negative voltage turn-off required for reliable GaN HEMT control. Driving GaN devices requires dedicated gate drivers such as the 1EDN7512B.

How is PFC over-voltage protection triggered and reset?

PFC over-voltage protection activates when VBUS exceeds 4.3 V (typical), causing immediate latched shutdown. Recovery requires cycling VCC power or pulling ENN low for >100 ms to clear the fault latch. The internal VBUS comparator includes 150 mV hysteresis to prevent oscillation near threshold.

What is the recommended minimum bootstrap capacitor value for continuous operation?

A minimum 0.1 µF ceramic capacitor is required between VB and VS pins to sustain HO drive under worst-case duty cycle (≥95%) and 600 V bus. Lower values risk insufficient charge retention, leading to HO dropout and half-bridge asymmetry; X7R dielectric with 25 V rating is validated per IR application note AN-1095.

IRS2548DSTRPBF Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: 14-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

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

IRS2548DSTRPBF FAQ

1.How can I place an order for IRS2548DSTRPBF through Aetrix?

Please submit a Request for Quotation (RFQ) for IRS2548DSTRPBF 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 IRS2548DSTRPBF reliable?

The price and inventory of IRS2548DSTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRS2548DSTRPBF is usually 5 days.

3.What payment methods are accepted for IRS2548DSTRPBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRS2548DSTRPBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRS2548DSTRPBF?

IRS2548DSTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRS2548DSTRPBF 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 IRS2548DSTRPBF?

For technical support, including IRS2548DSTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRS2548DSTRPBF requirements.

6.How does Aetrix verify that IRS2548DSTRPBF is sourced from the original manufacturer or authorized distributors?

All IRS2548DSTRPBF 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 IRS2548DSTRPBF meets industry standards.

7.What is the process for return or replacement of IRS2548DSTRPBF?

All IRS2548DSTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with IRS2548DSTRPBF, 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 IRS2548DSTRPBF part is unused and in its original packaging.

Return procedure for IRS2548DSTRPBF:

1.Submit a request within 90 days.

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

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