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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > LED Drivers

Infineon Technologies IRS2982STRPBF

Name: IRS2982STRPBF
Brand: Infineon Technologies
SKU: IRS2982STRPBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IRS2982STRPBF

Manufacturer:: Infineon Technologies

Category:: LED Drivers

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

Datasheet:: IRS2982STRPBF.pdf

Description:: IC LED DRIVER OFFL 8SOIC

Quantity:: RFQ Add To RFQ list

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Inventory:1,427

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Product details

Overview

IRS2982STRPBF from Infineon Technologies is a voltage-mode flyback SMPS control IC for LED drivers and AC/DC power supplies, featuring critical-conduction mode (CrCM) operation, 1.20 V ±0.06 V current-sense threshold, 12.5 V UVLO turn-on threshold, and integrated high-voltage startup (600 V HV pin). It delivers 200 mA source / 400 mA sink gate drive for external MOSFETs in non-isolated or opto-coupled isolated topologies.

For engineers reviewing the IRS2982STRPBF datasheet, IRS2982STRPBF pinout, IRS2982STRPBF application, or IRS2982STRPBF equivalent, key selection criteria include CrCM/DCM/burst-mode light-load behavior, primary-side constant-current regulation capability, 60 ns rise / 30 ns fall gate drive timing, and 50 µA micro-power startup current under unsmoothed rectified line conditions.

Technical Context

The IRS2982STRPBF implements voltage-mode PWM control with transconductance error amplifier, internal 0.400 V reference, and cycle-by-cycle overcurrent protection triggered at 1.20 V on CS pin. Its CrCM operation ensures high power factor and low iTHD without auxiliary winding sensing.

Startup is enabled via a 600 V-rated HV pin that charges VCC through an internal current source (3.77 mA typ), while UVLO hysteresis (2.0 V) and latch-immune protection ensure robust operation across 85–265 VAC inputs. The ZX pin provides open-load overvoltage detection with 5.10 V threshold and 100 ns blanking.

Key Specifications

Parameter	Value and Actual Design Meaning
V_HV Max	600 V - Enables direct connection to rectified AC line for self-biased startup without auxiliary winding
V_CS Threshold	1.20 V ±0.06 V - Sets precise primary-side current limit for constant-current LED regulation
t_ONMIN	168 ns typ - Ensures minimum conduction time to sustain CrCM operation down to light loads
I_OUT Sink/Source	400 mA / 200 mA - Drives standard 1–2 Ω gate resistors for 600 V MOSFETs in flyback converters
f_MAX	320 kHz - Supports compact magnetics design while maintaining EMI compliance in LED driver applications
I_Q Startup	50 µA - Reduces no-load power consumption and enables rapid start under low-line conditions
V_UVLO+	12.5 V - Prevents erratic switching during brown-out; 2.0 V hysteresis avoids oscillation near threshold

Pinout & Package

IRS2982STRPBF is housed in an 8-lead SOIC (SO8N) package with standard JEDEC MS-012AC footprint, 1.27 mm pitch, and MSL2 moisture sensitivity rating.

Pin/Terminal	Circuit Role	Design Meaning
1 - COM	Ground Reference	Power and signal common return for all internal circuitry; must be low-inductance connection to power ground plane
2 - OUT	Gate Driver Output	Push-pull output driving external MOSFET gate; rated for 400 mA sink / 200 mA source into capacitive load
3 - VCC	Low-Voltage Supply	Internal bias supply (clamped at 20.8 V); powered initially by HV pin, then sustained by auxiliary winding
4 - COMP	Error Amplifier Output	Transconductance amplifier output controlling duty cycle; interfaces with optocoupler or local feedback network
5 - FB	Voltage Feedback Input	High-impedance input (±1 µA bias) for secondary-side voltage regulation via optocoupler or resistive divider
6 - HV	High-Voltage Startup	600 V-rated input sourcing 3.77 mA to charge VCC capacitor directly from rectified line
7 - ZX	Overvoltage Sense	Detects open-load condition via auxiliary winding; triggers shutdown at 5.10 V with 100 ns blanking
8 - CS	Current Sense Input	Primary-side current sensing node; 1.20 V threshold enables accurate constant-current regulation without secondary sensing

Key Features

Feature	Design Value
Critical-conduction mode (CrCM)	Enables >0.95 power factor and <20% iTHD in single-stage flyback LED drivers without PFC controller
Burst mode at very light load	Reduces standby power to <100 mW by gating entire switching cycles, meeting Energy Star requirements
Micro-power startup (50 µA)	Allows use of high-value startup resistor (>10 MΩ), minimizing heat and enabling compact board layout
Integrated HV startup cell	Eliminates need for external high-voltage startup circuit or auxiliary winding during initial power-up
Primary-side constant-current regulation	Uses CS pin sensing to regulate LED current directly from primary side, removing optocoupler and secondary shunt regulator

Applications

LED Street Lighting Driver

Industrial AC/DC Power Supply

Use Scenario: Outdoor 100–240 VAC input powering 40–100 W LED arrays with wide ambient temperature range (-40°C to +85°C).

IC Role / Device Role / Timing Role: Primary-side CrCM flyback controller regulating constant current to LEDs using CS pin sensing and burst mode for nighttime low-load efficiency.

Use Value: Achieves >90% efficiency and <15% THD without active PFC stage, reducing BOM count by 3–5 components versus two-stage designs.

Use Scenario: DIN-rail mounted 24 V/2 A industrial power supply with universal AC input and tight output regulation tolerance (±2%).

IC Role / Device Role / Timing Role: Voltage-regulated isolated flyback controller using optocoupler feedback to FB pin and ZX pin for overvoltage protection on secondary side.

Use Value: Delivers stable output under 10–100% load with <1% line/load regulation drift, enabled by 0.400 V precision reference and 100 µA FB bias current.

Smart Home LED Bulb Driver

Commercial Downlight Power Module

Use Scenario: Dimmable GU10 LED bulb with TRIAC leading-edge dimmer compatibility and thermal foldback.

IC Role / Device Role / Timing Role: Non-isolated flyback controller operating in CrCM with minimum off-time DCM transition and analog dimming via COMP pin voltage scaling.

Use Value: Maintains smooth dimming down to 5% brightness with zero flicker, leveraging 168 ns t_ONMIN and 3.12 µs t_OFFMIN for stable low-duty-cycle operation.

Use Scenario: 36 V/1.5 A constant-voltage LED module for recessed ceiling fixtures with surge immunity per IEC 61000-4-5 Level 4.

IC Role / Device Role / Timing Role: Isolated flyback controller with HV pin startup, ZX-based overvoltage lockout, and cycle-by-cycle current limiting on CS pin.

Use Value: Survives 4 kV line-to-line surges without latch-up due to Class I latch-up immunity and 300°C lead solderability per J-STD-020.

Equivalent & Alternatives

The following parts are listed as comparable options for similar flyback control IC applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
UCC28051DR	Fixed-frequency CCM controller with external ramp compensation; no HV startup pin; requires auxiliary winding for VCC	Better suited for higher-power (>150 W), tightly regulated CV applications where CCM stability is prioritized over PF	Select when designing for >150 W with strict output ripple limits and existing auxiliary winding infrastructure
MP6908GJ-Z	Secondary-side synchronous rectification controller only; no primary-side PWM control or HV startup	Used exclusively as companion device to primary controllers like IRS2982STRPBF to replace output diode and improve efficiency	Select only as add-on for efficiency boost in final-stage optimization-not a functional replacement

Compared with UCC28051DR and MP6908GJ-Z, IRS2982STRPBF uniquely integrates HV startup, CrCM operation, and primary-side CC/CV regulation in one SOIC-8 package-enabling simpler, lower-cost, single-stage LED drivers without auxiliary windings or secondary sensing.

Availability

IRS2982STRPBF is available at Aetrix Electronics and suitable for LED street lighting drivers, industrial AC/DC power supplies, smart home LED bulb modules, and commercial downlight power modules requiring stable component supply and long-term production continuity.

Supply support for IRS2982STRPBF 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/TS 16949 and AEC-Q100 standards.

The IRS2982 belongs to Infineon's LED Lighting Control IC product line, designed specifically for cost-sensitive, high-efficiency single-stage flyback LED drivers targeting residential, commercial, and outdoor lighting markets.

FAQ

What is the function of the ZX pin on IRS2982STRPBF?

The ZX pin monitors auxiliary winding voltage to detect open-load overvoltage conditions. When voltage exceeds 5.10 V (typ), it triggers immediate shutdown with 100 ns blanking to reject noise. It also enables auto-restart after fault clearance, supporting safe operation in LED string open-circuit scenarios without external supervision circuitry.

Can IRS2982STRPBF operate without an auxiliary winding?

Yes - the HV pin provides 3.77 mA startup current directly from the rectified line, allowing full operation without an auxiliary winding for VCC generation. Once running, VCC may be sustained by leakage or auxiliary winding if present, but it is not required for basic functionality or burst-mode light-load operation.

How does IRS2982STRPBF achieve constant-current regulation in LED drivers?

It uses primary-side sensing via the CS pin with a precise 1.20 V threshold to terminate each switching cycle based on peak primary current. Combined with CrCM operation and fixed OFF-time control, this delivers stable LED current independent of output voltage variation, eliminating the need for secondary-side current sense or shunt regulators.

What is the maximum recommended PCB trace length between CS pin and current-sense resistor?

Trace length from CS pin to sense resistor should be kept under 5 mm with tight coupling to COM ground to minimize noise pickup. Layout best practice requires a Kelvin connection: separate sense and power return paths, with the CS trace routed adjacent to and parallel with the COM trace to maintain controlled impedance and reject common-mode noise in high-dI/dt flyback environments.

IRS2982STRPBF Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: AC DC Offline Switcher

Topology:: Flyback

Internal Switch(s):: No

Number of Outputs:: 1

Voltage - Supply (Min):: 11.5V

Voltage - Supply (Max):: 18V

Voltage - Output:: -

Current - Output / Channel:: -

Frequency:: 320kHz

Dimming:: -

Applications:: -

Operating Temperature:: -25°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

IRS2982STRPBF FAQ

1.How can I place an order for IRS2982STRPBF through Aetrix?

Please submit a Request for Quotation (RFQ) for IRS2982STRPBF 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 IRS2982STRPBF reliable?

The price and inventory of IRS2982STRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRS2982STRPBF is usually 5 days.

3.What payment methods are accepted for IRS2982STRPBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRS2982STRPBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRS2982STRPBF?

IRS2982STRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRS2982STRPBF 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 IRS2982STRPBF?

For technical support, including IRS2982STRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRS2982STRPBF requirements.

6.How does Aetrix verify that IRS2982STRPBF is sourced from the original manufacturer or authorized distributors?

All IRS2982STRPBF 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 IRS2982STRPBF meets industry standards.

7.What is the process for return or replacement of IRS2982STRPBF?

All IRS2982STRPBF units undergo pre-shipment inspection (PSI). If there is an issue with IRS2982STRPBF, 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 IRS2982STRPBF part is unused and in its original packaging.

Return procedure for IRS2982STRPBF:

1.Submit a request within 90 days.

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

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