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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Lighting, Ballast Controllers

Infineon Technologies IR2520DSPBF

Name: IR2520DSPBF
Brand: Infineon Technologies
SKU: IR2520DSPBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IR2520DSPBF

Manufacturer:: Infineon Technologies

Category:: Lighting, Ballast Controllers

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

Datasheet:: IR2520DSPBF.pdf

Description:: IC BALLAST CNTRL 86KHZ 8SOIC

Quantity:: RFQ Add To RFQ list

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Inventory:4,775

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Product details

Overview

IR2520DSPBF from Infineon Technologies is an adaptive fluorescent ballast controller and 600V half-bridge driver IC with integrated bootstrap FET, adaptive zero-voltage switching (ZVS), internal crest factor over-current protection, and a 0–6V voltage-controlled oscillator. It operates in fluorescent lighting systems requiring programmable minimum frequency (29.6–38.2 kHz), micropower startup (80 µA), and internal 15.6V VCC zener clamp.

For engineers reviewing the IR2520DSPBF datasheet, IR2520DSPBF pinout, IR2520DSPBF application, or IR2520DSPBF equivalent, key selection criteria include ZVS adaptability, VCO voltage range (0–6 V), FMIN resistor programmability (20–140 kΩ), crest factor fault threshold (5.0), and SOIC-8 package compatibility with lead-free assembly.

Technical Context

The IR2520DSPBF implements a three-phase operational sequence: UVLO startup (VCCUV+ = 12.6 V), frequency sweep mode (VCO ramp from 0.85 V to 4.8 V), and RUN mode (VCO ≥ 4.8 V). Its adaptive ZVS logic monitors VS slew rate (±50 V/ns) and disables high-side drive if non-ZVS is detected, forcing frequency increase to restore resonant operation.

Protection is implemented via dual-path sensing: crest factor over-current detection triggered when VS offset exceeds 3.0 V and peak-to-average ratio > 5.0, and independent VCO shutdown at 0.74–0.91 V (VCOSD). The integrated bootstrap FET enables self-biased high-side gate drive without external diode/capacitor networks.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Clamp	15.6 V zener - limits supply rail stress during transients and defines maximum safe VCC bias
f_min	29.6–38.2 kHz - sets lowest operating frequency for lamp sustain; set by RFMIN (20–140 kΩ)
Crest Factor Fault Threshold	5.0 - triggers shutdown when load current peak-to-average ratio exceeds safe MOSFET conduction margin
VCO Input Range	0–6 V - linearly controls oscillator frequency from f_max (67–96 kHz) to f_min
Startup Current	80 µA - enables direct DC bus startup via RSUPPLY without auxiliary supply
V_BS UVLO Threshold	7.7–10.3 V rising - ensures high-side driver only activates after bootstrap capacitor CBS is sufficiently charged
VS Slew Rate Limit	±50 V/ns - defines maximum allowable dVS/dt during dead time to detect non-ZVS conditions

Pinout & Package

IR2520DSPBF is housed in an 8-pin SOIC package (SO-8, 3.9 mm width) with standard JEDEC MS-012AC footprint and Pb-free (RoHS-compliant) finish.

Pin/Terminal	Circuit Role	Design Meaning
VCC	Primary supply input	Accepts 11.4–15.4 V; powers internal logic and low-side driver; clamped at 15.6 V
COM	Signal and power ground reference	Common return for all analog and digital circuitry; referenced for all voltage measurements
VCO	Voltage-controlled oscillator input	0–6 V analog control pin; determines output frequency; includes quick-start (IVCOQS) and sweep (IVCOFS) current sources
LO	Low-side gate driver output	Drives external N-channel MOSFET gate; logic-level compatible (0 V / VCC); 150 ns rise, 75 ns fall
VS	High-side floating return sense	Monitors half-bridge midpoint for ZVS detection and crest factor fault; rated to −0.3 V to VB + 0.3 V
HO	High-side gate driver output	Level-shifted output driving upper N-MOSFET; referenced to VS; supports 600 V bridge operation
VB	High-side floating supply	Provides gate drive voltage for HO; supplied via internal bootstrap FET from VCC through CBS
FMIN	Minimum frequency programming	Resistor-connected pin (20–140 kΩ) setting f_min; voltage ranges from 4.8–5.4 V in normal operation

Key Features

Feature	Design Value
Adaptive ZVS Control	Real-time VS slew monitoring and automatic frequency adjustment to maintain zero-voltage turn-on of both bridge switches
Integrated Bootstrap FET	Eliminates need for external bootstrap diode and reduces PCB area; supports self-charging of VB from VCC
VCO Quick-Start Circuit	Injects 50 µA into VCO at power-up to rapidly charge CVCO to 0.85 V, reducing preheat time uncertainty
Crest Factor Over-Current Protection	Detects abnormal current waveform distortion (peak/avg > 5.0) at VS node, indicating filament failure or lamp end-of-life
Micropower UVLO Startup	Draws ≤80 µA during VCC ramp-up, enabling direct connection to high-impedance DC bus supplies

Applications

Compact Fluorescent Lamp (CFL) Ballasts

Linear T5/T8 Fluorescent Ballasts

Use Scenario: Electronic ballast for 13–24 W spiral CFLs in residential and commercial fixtures.

IC Role / Device Role / Timing Role: Adaptive ballast controller managing preheat, ignition, and run phases; provides ZVS-gated half-bridge drive timing.

Use Value: Enables reliable cold-start ignition at −25°C and extends lamp life by preventing capacitive-mode switching during aging.

Use Scenario: Dimmable 24–58 W linear fluorescent fixture with analog 0–10 V dimming interface.

IC Role / Device Role / Timing Role: Core timing and protection IC generating variable-frequency half-bridge drive synchronized to lamp impedance changes.

Use Value: Maintains constant lamp power across line voltage variation (±10%) and temperature drift using adaptive f_min and VCO feedback.

LED Retrofit Ballast Emulators

UV-C Germicidal Lamp Drivers

Use Scenario: LED tube replacement driver emulating legacy magnetic ballast electrical signature to avoid fixture rewiring.

IC Role / Device Role / Timing Role: Generates controlled high-frequency AC output mimicking fluorescent lamp impedance profile while delivering DC to LEDs.

Use Value: Achieves Class A EMC compliance without external EMI filters by leveraging ZVS-based spectral shaping of switching harmonics.

Use Scenario: High-reliability 25–40 W germicidal UVC lamp driver for air/water disinfection systems.

IC Role / Device Role / Timing Role: Fault-tolerant ballast controller with dual over-current protection (crest factor + VS offset) for mercury vapor lamp arc instability.

Use Value: Prevents catastrophic lamp explosion by shutting down within 100 µs of VS offset exceeding 3.0 V, indicating arc collapse or electrode sputtering.

Equivalent & Alternatives

The following parts are listed as comparable options for similar adaptive fluorescent ballast controller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
IRS2530DSTRPBF	Fixed 600 V half-bridge driver with no integrated bootstrap FET; requires external bootstrap diode; no VCO - uses RC oscillator with fixed f_min	Lacks adaptive ZVS and crest factor protection; suited for cost-sensitive, non-dimmable T8 ballasts	Select when system-level bootstrap design is already established and adaptive protection is not required
UCC3305PW	500 V controller with external high-side driver; no integrated bootstrap FET; no crest factor protection; VCO range 0–5 V	Requires discrete high-side level shifter; lacks VS-sensing fault logic; limited to lower-power (<15 W) CFLs	Choose for legacy designs migrating from TI platforms where board layout reuse is critical

Compared with IRS2530DSTRPBF and UCC3305PW, IR2520DSPBF delivers higher integration (integrated bootstrap FET), superior protection (adaptive ZVS + crest factor), and wider VCO control range (0–6 V), enabling tighter lamp power regulation and extended cold-start capability.

Availability

IR2520DSPBF is available at Aetrix Electronics and suitable for compact fluorescent lamp (CFL) ballasts, linear T5/T8 electronic ballasts, LED retrofit emulators, and UV-C germicidal lamp drivers requiring stable component supply and long-term production continuity.

Supply support for IR2520DSPBF 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 energy-efficient lighting solutions.

The IR2520D product line was designed specifically for self-contained, adaptive electronic ballasts targeting energy-efficient fluorescent lighting systems with stringent reliability and safety requirements.

FAQ

What is the purpose of the FMIN pin, and how does it affect lamp operation?

The FMIN pin sets the minimum operating frequency via an external resistor (20–140 kΩ). This defines the lowest frequency the VCO reaches during lamp run mode, ensuring the ballast operates below the resonant tank's natural frequency to maintain stable lamp power and prevent acoustic resonance. Incorrect RFMIN values cause insufficient preheat or unstable lamp regulation.

How does the IR2520DSPBF detect and respond to lamp filament failure?

It detects filament failure via crest factor over-current protection: when VS node voltage exceeds 3.0 V and the peak-to-average current ratio exceeds 5.0, the IC enters FAULT mode, pulls VCO to 0 V, and disables both HO and LO outputs within 100 µs. This prevents destructive high-current stress on half-bridge MOSFETs caused by open-filament conditions.

Can the IR2520DSPBF operate without an external bootstrap diode?

Yes - its integrated bootstrap FET eliminates the need for an external diode. During LO conduction, the internal FET connects VCC to the VB node, charging the external bootstrap capacitor CBS. This reduces component count and improves reliability in space-constrained CFL and LED retrofit designs.

What is the significance of the 15.6 V zener clamp on the VCC pin?

The 15.6 V zener clamp protects internal circuitry from overvoltage transients on the VCC rail. It allows direct connection to unregulated DC bus supplies up to ~20 V while limiting dissipation in the clamp structure. Designers must ensure RSUPPLY delivers sufficient current (>10 mA) to keep the clamp regulating, especially during startup and fault recovery.

IR2520DSPBF Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

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

Packaging:: Tube

Product Status:: Discontinued at Digi-Key

Type:: Ballast Controller

Frequency:: 34kHz ~ 86kHz

Voltage - Supply:: 11.4V ~ 15.4V

Current - Supply:: 10 mA

Current - Output Source/Sink:: -

Dimming:: No

Operating Temperature:: -25°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

IR2520DSPBF FAQ

1.How can I place an order for IR2520DSPBF through Aetrix?

Please submit a Request for Quotation (RFQ) for IR2520DSPBF 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 IR2520DSPBF reliable?

The price and inventory of IR2520DSPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR2520DSPBF is usually 5 days.

3.What payment methods are accepted for IR2520DSPBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR2520DSPBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IR2520DSPBF?

IR2520DSPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IR2520DSPBF 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 IR2520DSPBF?

For technical support, including IR2520DSPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR2520DSPBF requirements.

6.How does Aetrix verify that IR2520DSPBF is sourced from the original manufacturer or authorized distributors?

All IR2520DSPBF 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 IR2520DSPBF meets industry standards.

7.What is the process for return or replacement of IR2520DSPBF?

All IR2520DSPBF units undergo pre-shipment inspection (PSI). If there is an issue with IR2520DSPBF, 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 IR2520DSPBF part is unused and in its original packaging.

Return procedure for IR2520DSPBF:

1.Submit a request within 90 days.

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

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