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Infineon Technologies IRS2983SPBF
- Part No.:
- IRS2983SPBF
- Manufacturer:
- Infineon Technologies
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
IRS2983SPBF.pdf
- Description:
- IC LED DRIVER OFFL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,905
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Product details
Overview
IRS2983SPBF from Infineon Technologies (formerly International Rectifier) is a flyback LED driver control IC operating in critical-conduction mode with primary-side constant power regulation, 1.25 V current-sense threshold, 60 ns turn-on rise time, and 200 mA/400 mA source/sink gate drive capability. It enables isolated, optocoupler-free LED drivers for AC mains-powered luminaires.
For engineers reviewing the IRS2983SPBF datasheet, IRS2983SPBF pinout, IRS2983SPBF application, or IRS2983SPBF equivalent, key selection criteria include its CrCM operation, HV startup capability (30 V min), 12.5 V UVLO threshold, and integrated open-load overvoltage protection at the ZX pin.
Technical Context
The IRS2983SPBF implements primary-side regulation using an internal multiplier with 2.0× gain and a 1.00 V reference to derive real-time power estimate from rectified line voltage (VDC) and sensed current (CS). Its state machine includes blanking (200 ns), minimum off-time (3.0 µs), and restart timing (100 µs) to ensure stable CrCM operation across line and load variations.
Protection logic integrates dual-threshold ZX pin comparators (1.54 V arm / 0.60 V trigger; 5.15 V OV threshold with 200 mV hysteresis), cycle-by-cycle current limiting via CS pin (1.25 V threshold), and latch-immune fault recovery-enabling robust operation in unregulated AC-input LED systems without secondary feedback.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC UVLO Threshold | 12.5 V typ; ensures reliable startup only after auxiliary winding delivers sufficient bias supply |
| CS Pin Threshold | 1.25 V typ; sets precise overcurrent trip point for MOSFET drain current sensing |
| OUT tr/tf | 60 ns / 30 ns typ; supports fast-switching GaN or Si MOSFETs with minimal switching loss |
| ZX Pin OV Threshold | 5.15 V typ; disables gate drive during open-load condition to prevent output overvoltage |
| Startup Current | 150 µA max; enables direct HV startup from rectified AC line without auxiliary resistor loss |
| Quiescent Current | 2.5 mA typ; minimizes no-load power consumption in standby burst mode |
| Multiplier Gain KMULT | 2.00 typ; scales VDC × CS product to match 1.00 V reference for accurate primary power regulation |
Pinout & Package
IRS2983SPBF is housed in an 8-lead SOIC (SO8N) package with standard JEDEC MS-012AC footprint, rated MSL2 per J-STD-020, and qualified for industrial temperature range (–25°C to +125°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| HV | High-voltage startup input | Accepts 30–600 V DC to charge VCC capacitor before auxiliary winding takes over |
| COM | Power ground reference | Common return for all analog and power circuits; must be low-inductance PCB connection |
| CS | Current sense input | Receives voltage from primary-side current-sense resistor; triggers cycle termination at 1.25 V |
| ZX | ZCD and overvoltage monitor | Detects zero-crossing for CrCM timing and disables output if >5.15 V (open-load protection) |
| VDC | Rectified line voltage feed | Provides scaled AC line input to internal multiplier for real-time power calculation |
| COMP | Error amplifier output | Sinks or sources up to 30 µA to adjust PWM duty cycle based on power error |
| OUT | Gate driver output | Drives external MOSFET gate with 200 mA source / 400 mA sink and 60 ns rise time |
| VCC | Bias supply input | Regulated 12–20.8 V supply; internally clamped at 20.8 V to protect logic circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Primary-side constant power regulation | Eliminates optocoupler and secondary-side feedback components, reducing BOM cost and improving reliability in isolated LED drivers |
| Critical-conduction mode (CrCM) control | Enables high power factor (>0.9) and low THD in single-stage flyback designs directly from rectified AC line |
| Integrated HV startup circuit | Draws only 150 µA to initiate operation from bulk DC bus, avoiding power-wasting startup resistors |
| Burst-mode light-load operation | Reduces standby power to <100 mW by gating PWM pulses while maintaining regulation accuracy |
| Open-load overvoltage protection | Monitors ZX pin voltage; latches off OUT if >5.15 V to prevent LED string overvoltage during disconnection |
Applications
| Street Lighting Drivers | Commercial Downlight Drivers |
|---|---|
Use Scenario: Outdoor LED street luminaires powered directly from 100–277 V AC mains with no secondary feedback. IC Role / Device Role / Timing Role: Primary-side CrCM controller regulating output power via VDC and CS inputs; provides ZX-based zero-cross detection for boundary conduction timing. Use Value: Achieves >90% efficiency and PF >0.95 without optocoupler, reducing component count and field failure risk. | Use Scenario: Indoor recessed LED downlights requiring compact, thermally constrained drivers with dimming compatibility. IC Role / Device Role / Timing Role: Flyback controller implementing burst-mode dimming at light load and precise constant-power regulation across 10–100% output range. Use Value: Enables smooth 1–10 V or PWM dimming with <3% output power variation and <100 mW no-load consumption. |
| Industrial High-Bay Lighting | UV-C Disinfection Modules |
Use Scenario: High-lumen industrial fixtures operating continuously in ambient temperatures up to 70°C. IC Role / Device Role / Timing Role: Robust CrCM controller with thermal derating via junction temperature monitoring and built-in latch immunity against ESD transients. Use Value: Sustains full output power at TJ = 125°C with automatic foldback below VCCUV−, ensuring safe thermal shutdown. | Use Scenario: Pulsed UV-C LED arrays requiring precise current regulation and rapid fault response during sterilization cycles. IC Role / Device Role / Timing Role: Fast-response flyback controller with 200 ns current-sense blanking and 100 µs restart timer for transient overcurrent recovery. Use Value: Limits peak current to ±5% tolerance during 100 kHz pulsed operation and clears faults within one switching cycle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flyback LED driver control applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCC28810DR | Fixed-frequency DCM controller; lacks primary-side power regulation and HV startup | Requires optocoupler feedback and external startup circuit; lower integration | Prefer when fixed-frequency EMI profile is mandatory and secondary feedback is acceptable |
| BD7901FJ-E2 | CrCM controller with 1.2 V CS threshold and no HV startup; requires external VCC supply | Needs auxiliary winding from startup; no direct AC-line HV start capability | Choose when board space allows dedicated bias winding and lower gate drive (±150 mA) suffices |
Compared with UCC28810DR and BD7901FJ-E2, IRS2983SPBF uniquely combines HV startup, primary-side constant power regulation, and integrated open-load protection-making it optimal for cost-sensitive, optocoupler-free, AC-input LED drivers where reliability and integration are prioritized over fixed-frequency EMI control.
Availability
IRS2983SPBF is available at Aetrix Electronics and suitable for street lighting, commercial downlights, industrial high-bay fixtures, and UV-C disinfection modules requiring stable component supply and long-term industrial qualification.
Supply support for IRS2983SPBF 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 acquired International Rectifier in 2015 and continues its legacy of high-performance power semiconductors and control ICs for energy-efficient systems.
The IRS2983SPBF belongs to Infineon's LED Driver IC product line, engineered specifically for isolated, primary-side regulated flyback topologies targeting cost-sensitive, high-reliability solid-state lighting applications.
FAQ
What is the purpose of the ZX pin on the IRS2983SPBF?
The ZX pin serves dual functions: zero-current detection for CrCM timing and open-load overvoltage protection. It monitors transformer auxiliary winding voltage; when rising above 1.54 V, it arms the comparator, and upon crossing 5.15 V, it forces gate drive disable to prevent output overvoltage during LED string removal or failure.
Does the IRS2983SPBF require an external optocoupler for regulation?
No. The IRS2983SPBF implements primary-side constant power regulation using internal multiplication of VDC (rectified line) and CS (primary current) signals, eliminating the need for optocoupler-based secondary feedback. This reduces component count, improves reliability, and lowers system cost in isolated LED drivers.
How does the HV startup circuit operate in the IRS2983SPBF?
The HV pin draws ≤150 µA from the rectified AC line (30–600 V) to charge the VCC capacitor until the auxiliary winding delivers sufficient voltage to sustain operation. Once VCC exceeds 12.5 V, the HV circuit automatically disables, minimizing standby loss and enabling direct high-voltage initiation without external resistors.
Can the IRS2983SPBF be used with secondary-side feedback?
Yes. Although optimized for primary-side regulation, the IRS2983SPBF supports optional secondary feedback via the COMP pin. An external error amplifier can override the internal amplifier output to inject correction signals-enabling hybrid configurations where tighter regulation or specific dimming behavior is required.
IRS2983SPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- LEDrivIR™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- AC DC Offline Switcher
- Topology:
- Flyback, Step-Down (Buck), Step-Up (Boost)
- Internal Switch(s):
- No
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 11.5V
- Voltage - Supply (Max):
- 18V
- Voltage - Output:
- -
- Current - Output / Channel:
- -
- Frequency:
- -
- Dimming:
- -
- Applications:
- -
- Operating Temperature:
- -25°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
IRS2983SPBF FAQ
1.How can I place an order for IRS2983SPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for IRS2983SPBF 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 IRS2983SPBF reliable?
The price and inventory of IRS2983SPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRS2983SPBF is usually 5 days.
3.What payment methods are accepted for IRS2983SPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRS2983SPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IRS2983SPBF?
IRS2983SPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IRS2983SPBF 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 IRS2983SPBF?
For technical support, including IRS2983SPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRS2983SPBF requirements.
6.How does Aetrix verify that IRS2983SPBF is sourced from the original manufacturer or authorized distributors?
All IRS2983SPBF 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 IRS2983SPBF meets industry standards.
7.What is the process for return or replacement of IRS2983SPBF?
All IRS2983SPBF units undergo pre-shipment inspection (PSI). If there is an issue with IRS2983SPBF, 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 IRS2983SPBF part is unused and in its original packaging.
Return procedure for IRS2983SPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
IRS2983SPBF Tags
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