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

Infineon Technologies IR2520DPBF

Name: IR2520DPBF
Brand: Infineon Technologies
SKU: IR2520DPBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IR2520DPBF

Manufacturer:: Infineon Technologies

Category:: Lighting, Ballast Controllers

Package:: 8-DIP (0.300", 7.62mm)

Datasheet:: IR2520DPBF.pdf

Description:: IC BALLAST CNTRL 86KHZ 8DIP

Quantity:: RFQ Add To RFQ list

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Inventory:4,263

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Product details

Overview

IR2520DPBF from Infineon Technologies is an adaptive fluorescent ballast controller and integrated 600V half-bridge gate driver in a single SOIC-8 package. It implements adaptive zero-voltage switching (ZVS), internal crest factor over-current protection, and a voltage-controlled oscillator with programmable minimum frequency (29.6–38.2 kHz) for electronic CFL and T5/T8 lamp ballasts.

For engineers reviewing the IR2520DPBF datasheet, IR2520DPBF pinout, IR2520DPBF application, or IR2520DPBF equivalent, key selection criteria include VCO voltage range (0–6 V), micropower startup current (80 µA), integrated bootstrap FET, 15.6 V VCC zener clamp, and ZVS fault detection via VS pin slew-rate monitoring.

Technical Context

The IR2520DPBF integrates a precision VCO with external RFMIN resistor programming and CVCO capacitor-controlled ramp timing to execute frequency sweep ignition, transitioning from high-frequency preheat to low-frequency run mode. Its adaptive ZVS logic continuously monitors VS pin dV/dt during dead time to dynamically adjust frequency and maintain soft-switching.

Protection is implemented through dual UVLO thresholds (VCCUV+ = 12.6 V, VBSUV+ = 9.0 V), crest factor fault detection (CSCF = 5.0), and internal 15.6 V VCC clamp. The bootstrap FET enables self-powered high-side drive without external diode/capacitor charge pump complexity.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Clamp Voltage	15.6 V - internal zener limits supply rail stress and eliminates need for external regulator
Min Oscillator Frequency	29.6–38.2 kHz - set by RFMIN (20–140 kΩ); ensures safe sweep through resonant tank ignition point
VCO Input Range	0–6 V - linear control of output frequency; 4.8 V threshold triggers RUN mode entry
Startup Current	80 µA - enables direct DC-bus powering via high-value RSUPPLY, reducing auxiliary supply cost
High-Side Driver Voltage	600 V max VB - supports direct connection to 400 V DC bus in offline CFL ballasts
ZVS Detection Threshold	dV/dt ≥ 50 V/ns on VS pin - detects non-ZVS capacitive-mode switching to prevent MOSFET overcurrent failure
Crest Factor Fault Trip	CSCF = 5.0 - compares peak-to-average current ratio at VS to detect open-filament or end-of-life lamp conditions

Pinout & Package

IR2520DPBF is housed in an industry-standard 8-pin SOIC package (body width 3.9 mm, lead pitch 1.27 mm), RoHS-compliant and lead-free (PbF).

Pin/Terminal	Circuit Role	Design Meaning
V_CC	Supply input with 15.6 V internal clamp	Primary power rail; must be charged above 12.6 V to exit UVLO and enable outputs
COM	Signal and power ground reference	Common return for all analog sensing and gate drive logic; tied to low-side MOSFET source
VCO	Voltage-controlled oscillator input	0–6 V analog control pin; ramped externally to sweep frequency from f_max to f_min
LO	Low-side gate driver output	Drives external N-channel MOSFET gate; first to activate during startup to charge bootstrap capacitor
VS	High-side floating return / ZVS sense node	Monitors half-bridge midpoint; slew rate used for real-time ZVS validation and fault shutdown
HO	High-side gate driver output	Drives high-side N-channel MOSFET gate; enabled only after VB–VS exceeds 9.0 V (V_BSUV+)
VB	High-side floating supply	Bootstrap-supplied rail for HO driver; internally connected to V_CC via integrated FET during LO conduction
FMIN	Minimum frequency setting input	Resistor-to-ground sets f_min; voltage at pin (4.8–5.4 V in run mode) confirms proper biasing

Key Features

Feature	Design Value
Adaptive ZVS control	Real-time dV/dt monitoring at VS pin enables dynamic frequency adjustment to sustain soft-switching under varying lamp impedance
Integrated bootstrap FET	Eliminates external bootstrap diode and reduces component count; enables reliable high-side drive in compact CFL designs
Micropower UVLO startup	80 µA quiescent current allows direct derivation from rectified AC line via high-value RSUPPLY, removing auxiliary transformer
Crest factor over-current protection	Detects lamp filament open-circuit or end-of-life by comparing VS peak-to-average current ratio against fixed 5.0 threshold
Programmable frequency sweep	CVCO + RFMIN define preheat duration and ignition frequency trajectory-critical for reliable cold-start of T5/T8 lamps

Applications

Compact Fluorescent Lamp (CFL) Ballast

T5/T8 Linear Fluorescent Ballast

Use Scenario: Electronic ballast for 5–42 W spiral CFLs in residential and commercial lighting fixtures.

IC Role / Device Role / Timing Role: Adaptive ballast controller and half-bridge driver managing preheat, ignition, and regulated run modes.

Use Value: Enables flicker-free start and >10,000-hour lamp life via precise ZVS maintenance and crest factor fault shutdown.

Use Scenario: Instant-start and programmed-start ballasts for 24–80 W T5/T8 tubes in office and industrial luminaires.

IC Role / Device Role / Timing Role: Primary timing and protection IC coordinating resonant tank operation and MOSFET gate drive sequencing.

Use Value: Reduces BOM count by integrating bootstrap FET and eliminating discrete VCO/UVLO/protect circuits.

Lamp End-of-Life Protection System

DC-Input Fluorescent Ballast

Use Scenario: Safety-critical ballast in medical or emergency lighting where open-filament detection prevents hazardous overvoltage.

IC Role / Device Role / Timing Role: Real-time current waveform analyzer using VS node sensing and crest factor computation.

Use Value: Prevents catastrophic failure by shutting down before electrode sputtering causes arc instability or glass rupture.

Use Scenario: Off-grid or solar-powered lighting systems using 12–48 V DC input with boost-derived 400 V DC bus.

IC Role / Device Role / Timing Role: Core controller adapting frequency sweep and ZVS behavior to variable DC input and lamp aging.

Use Value: Maintains consistent lamp power and lifetime across wide input voltage range without manual recalibration.

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
IRS2166DSTRPBF	Higher V_CC clamp (16.3 V); no integrated bootstrap FET; requires external bootstrap diode	Supports same lamp types but demands larger PCB area and higher gate drive loss	Preferred when legacy layout re-use favors discrete bootstrap or higher V_CC margin is required
UCC3305D	Analog VCO only (no ZVS adaptation); no crest factor protection; 500 V max VB rating	Limited to lower-power (<25 W), non-safety-critical CFLs without end-of-life detection	Select only for cost-sensitive, low-complexity designs where ZVS optimization and lamp safety are secondary

Compared with IRS2166DSTRPBF and UCC3305D, IR2520DPBF uniquely integrates ZVS adaptation, crest factor fault detection, and bootstrap FET in one SOIC-8 package-reducing system-level component count by ≥4 and enabling Class I lamp safety compliance without external circuitry.

Availability

IR2520DPBF is available at Aetrix Electronics and suitable for compact fluorescent lamp ballasts, T5/T8 linear fluorescent drivers, lamp end-of-life protection systems, and DC-input fluorescent lighting requiring stable component supply and long-lifecycle support.

Supply support for IR2520DPBF 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 global manufacturing and quality certification to ISO 9001 and IATF 16949.

The IR2520DPBF belongs to Infineon's dedicated fluorescent ballast controller product line, engineered specifically for high-reliability, energy-efficient electronic lighting systems with built-in lamp safety and adaptive resonant control.

FAQ

What is the function of the FMIN pin and how is it configured?

The FMIN pin sets the minimum operating frequency via an external resistor to ground (RFMIN = 20–140 kΩ). During normal operation, its voltage stabilizes at 4.8–5.4 V, confirming correct biasing. This resistor determines the lowest frequency reached after lamp ignition, ensuring stable run-mode power regulation below the resonant tank's natural frequency.

How does the IR2520DPBF detect and respond to non-ZVS conditions?

Non-ZVS is detected by monitoring the slew rate (dV/dt) of the VS pin during the LO–HO dead time. If the VS voltage fails to reach COM within the dead-time window-indicating capacitive-mode switching-the IC increases frequency to shift operation back toward inductive resonance, preventing destructive MOSFET peak currents.

Can the IR2520DPBF operate directly from a rectified AC line without an auxiliary supply?

Yes. With micropower startup current (80 µA) and internal 15.6 V VCC clamp, the IC can be powered directly from the DC bus via a high-value RSUPPLY resistor and CVCC hold-up capacitor-eliminating the need for transformer-based auxiliary supplies in space-constrained CFL designs.

What is the role of the integrated bootstrap FET and how does it improve reliability?

The integrated bootstrap FET replaces the external bootstrap diode, reducing forward voltage drop and reverse recovery losses. It charges the CBS capacitor during LO conduction, ensuring robust high-side drive even under low-duty-cycle or high-temperature conditions-improving thermal stability and eliminating diode-related failure modes.

IR2520DPBF Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: 8-DIP (0.300", 7.62mm)

Packaging:: Tube

Product Status:: Obsolete

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:: Through Hole

Supplier Device Package:: 8-PDIP

IR2520DPBF FAQ

1.How can I place an order for IR2520DPBF through Aetrix?

Please submit a Request for Quotation (RFQ) for IR2520DPBF 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 IR2520DPBF reliable?

The price and inventory of IR2520DPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR2520DPBF is usually 5 days.

3.What payment methods are accepted for IR2520DPBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR2520DPBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IR2520DPBF?

IR2520DPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IR2520DPBF 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 IR2520DPBF?

For technical support, including IR2520DPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR2520DPBF requirements.

6.How does Aetrix verify that IR2520DPBF is sourced from the original manufacturer or authorized distributors?

All IR2520DPBF 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 IR2520DPBF meets industry standards.

7.What is the process for return or replacement of IR2520DPBF?

All IR2520DPBF units undergo pre-shipment inspection (PSI). If there is an issue with IR2520DPBF, 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 IR2520DPBF part is unused and in its original packaging.

Return procedure for IR2520DPBF:

1.Submit a request within 90 days.

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

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