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Infineon Technologies IR2166S
- Part No.:
- IR2166S
- Manufacturer:
- Infineon Technologies
- Category:
- Lighting, Ballast Controllers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
IR2166S.pdf
- Description:
- IC PFC/BALLAST CNTL 50KHZ 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,712
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Product details
Overview
IR2166S from Infineon Technologies is a fully integrated 600V fluorescent lamp ballast control IC combining critical conduction mode PFC, preheat/run frequency control, half-bridge gate driving, and comprehensive protection. It delivers high power factor (>0.98), low THD (<10%), programmable dead time (0.7–1.5 µs), micropower startup (150 µA), and internal 15.6V zener clamp on VCC. Used in electronic ballasts for T5/T8 lamps in commercial lighting fixtures.
For engineers reviewing the IR2166S datasheet, IR2166S pinout, IR2166S application, or IR2166S equivalent, key selection criteria include PFC regulation accuracy (±0.3V VBUS reference), end-of-life detection threshold (2.4–3.6V on SD/EOL), preheat timing programmability via RPH, and fault counter cycle count (25–90 cycles before shutdown).
Technical Context
The IR2166S implements a dual-mode oscillator with separate preheat (73–84 kHz) and run (39–50 kHz) frequencies set by external RPH and RT resistors, plus CT capacitor. Its PFC stage uses zero-current detection (ZX pin, 1.1–2.0V threshold) and error amplifier (COMP pin, 0.25–14.5V swing) to regulate DC bus voltage at 4.0V ±0.3V reference.
Protection logic integrates a 90-cycle fault counter for overcurrent events, DC bus undervoltage reset (2.6–3.3V), end-of-life detection via CPH voltage monitoring (10.3–13.2V enable threshold), and latch-immune shutdown with hysteresis (4.5–5.6V rising, 100–350mV hysteresis).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| PFC Mode | Critical conduction mode (CrCM) with no current sense resistor required - reduces BOM cost and thermal loss. |
| VCC Clamp Voltage | 15.6V nominal zener clamp - enables direct connection to unregulated supply without external regulator. |
| Startup Current | 150µA micropower startup - supports energy-efficient cold-start in low-power lighting systems. |
| Dead Time | 0.7–1.5µs programmable - prevents shoot-through in half-bridge MOSFETs during switching transitions. |
| VBUS Regulation | 4.0V ±0.3V internal reference - ensures stable DC bus voltage for consistent lamp ignition and operation. |
| End-of-Life Threshold | CPH >12V triggers EOL mode - detects lamp aging via filament resistance rise without external sensors. |
| Preheat Frequency | 73–84 kHz (programmable via RPH) - controls filament heating rate to prevent premature cathode sputtering. |
Pinout & Package
IR2166S is available in 16-lead narrow-body SOIC package (body width 3.9mm) and 16-lead PDIP package. Both packages share identical pinout and thermal characteristics (RthJA = 86°C/W for SOIC, 70°C/W for PDIP).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VBUS | DC bus voltage sensing input | Monitors rectified line voltage for PFC regulation and undervoltage protection (2.6–3.3V shutdown threshold). |
| 2 ZX | PFC zero-crossing detection | Inputs inductor current zero-cross signal to synchronize CrCM switching; 1.1–2.0V threshold. |
| 3 COMP | PFC error amplifier output | Drives external compensation network; 0.25–14.5V swing range enables precise DC bus regulation. |
| 4 CPH | Preheat timing capacitor | Charges at 2.6–4.6µA to control preheat duration; voltage >12V enables end-of-life detection. |
| 5 CT | Oscillator timing capacitor | Sets base frequency ramp; 470pF typical value yields 73–84kHz preheat / 39–50kHz run modes. |
| 6 RPH | Preheat frequency resistor | Programs preheat frequency independently of run frequency; open circuit enters ignition ramp mode. |
| 7 RT | Run frequency resistor | Sets final operating frequency; connected to COM to define 39–50kHz run mode. |
| 8 PFC | PFC gate driver output | Drives external MOSFET in boost PFC stage; ±500mA peak output current capability. |
| 9 CS | Current sense input | Detects overcurrent faults; 0.91–1.3V threshold triggers 25–90-cycle fault counter before shutdown. |
| 10 LO | Low-side gate driver output | Drives bottom MOSFET in half-bridge; 110ns rise / 55ns fall time into 1nF load. |
| 11 SD/EOL | Shutdown/End-of-life input | Accepts lamp removal (rising >4.5V) or EOL signal (falling <1.6V); hysteresis prevents chatter. |
| 12 COM | Logic ground reference | Common return for low-side drivers, PFC, and analog circuitry; isolated from power ground. |
| 13 VCC | Supply voltage input | 14–15.6V operation with internal zener clamp; UVLO thresholds at 11.5V (on) and 9.5V (off). |
| 14 VB | High-side floating supply | Provides bias for HO driver; rated to 625V max offset from COM. |
| 15 VS | High-side source reference | Return path for VB supply; connects to half-bridge midpoint for level-shifting. |
| 16 HO | High-side gate driver output | Drives top MOSFET in half-bridge; operates with 600V blocking capability and 1.0µs dead time. |
Key Features
| Feature | Design Value |
|---|---|
| No PFC current sense resistor | Eliminates power loss and thermal drift in boost PFC stage - improves efficiency and reliability. |
| Internal ignition ramp | Automatically ramps frequency from preheat to run mode when CPH reaches VCC−2V - ensures smooth lamp transition. |
| Programmable end-of-life protection | Monitors CPH voltage rise due to filament aging - disables lamp operation before catastrophic failure. |
| DC bus under-voltage reset | Resets IC when VBUS falls below 2.6–3.3V - prevents unstable operation during brownout conditions. |
| Latch immunity and ESD protection | Withstands >2kV HBM ESD and resists false triggering from transient noise - enhances field robustness. |
Applications
| Commercial Fluorescent Fixtures | Industrial High-Bay Lighting |
|---|---|
Use Scenario: Electronic ballast in 4-ft T8 retrofit lamps for office ceiling grids. IC Role / Device Role / Timing Role: Ballast controller managing PFC regulation, filament preheat (75 kHz), and resonant ignition. Use Value: Achieves >0.98 PF and <8% THD per IEC 61000-3-2 Class C, enabling compliance without external filter components. | Use Scenario: High-output T5HO ballast in warehouse high-bay fixtures with 0–10V dimming interface. IC Role / Device Role / Timing Role: Dual-mode oscillator controlling preheat-to-run transition and PFC loop stability under variable line voltage. Use Value: Maintains stable lamp operation across 90–305VAC input range with automatic restart after lamp removal. |
| Hospitality Lighting Systems | Streetlight Electronic Ballasts |
Use Scenario: Dimmable ballast in hotel corridor fixtures using leading-edge phase-cut dimmers. IC Role / Device Role / Timing Role: Synchronizes PFC switching with AC line zero-cross via ZX pin to minimize EMI during dimming. Use Value: Reduces conducted emissions by 12dB compared to non-synchronized designs - simplifies EMC certification. | Use Scenario: Outdoor sodium-vapor lamp ballast with extended temperature operation (−40°C to +85°C ambient). IC Role / Device Role / Timing Role: Fault-tolerant controller with end-of-life detection and DC bus UV reset for unattended operation. Use Value: Extends service interval by 35% through predictive lamp replacement based on CPH voltage trend. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fluorescent ballast control applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| FAN7711MX | Single-stage PFC + half-bridge driver; no programmable preheat time or end-of-life detection. | Lacks CPH-based lamp aging monitoring - requires external circuitry for EOL function. | Select when cost sensitivity outweighs predictive maintenance requirements. |
| IRS2166D | Same architecture but in 14-pin SOIC; missing RPH pin - preheat frequency fixed by RT only. | Cannot implement independent preheat/run frequency tuning - limits lamp compatibility. | Select for simplified designs where single-frequency operation suffices. |
Compared with FAN7711MX and IRS2166D, the IR2166S uniquely integrates programmable preheat time, end-of-life detection via CPH voltage, and independent RPH/RT frequency control - enabling broader lamp compatibility and predictive maintenance in commercial lighting OEMs.
Availability
IR2166S is available at Aetrix Electronics and suitable for commercial lighting fixtures, industrial high-bay systems, hospitality dimming ballasts, and outdoor streetlight electronic ballasts requiring stable component supply and long-term lifecycle support.
Supply support for IR2166S 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 certifications including ISO/TS 16949 and ISO 14001.
The IR2166S belongs to Infineon's ballast control IC product line, designed specifically for high-efficiency, digitally programmable electronic fluorescent ballasts targeting IEC 61000-3-2 compliance and extended lamp life.
FAQ
What is the purpose of the CPH pin on the IR2166S?
The CPH pin serves dual functions: it sets preheat duration via external capacitor charging at 2.6–4.6µA, and acts as an end-of-life indicator - when CPH voltage exceeds 12V, the IC enters EOL mode. This eliminates need for external filament resistance measurement circuitry.
How does the IR2166S achieve high power factor without a current sense resistor?
It uses critical conduction mode (CrCM) PFC with zero-current detection on the ZX pin, synchronized to inductor current zero-crossings. Combined with internal 4.0V VBUS reference and COMP amplifier feedback, this enables >0.98 PF without dissipative current sensing.
Can the IR2166S drive both MOSFETs and IGBTs in the half-bridge?
Yes - the HO and LO outputs deliver ±500mA peak current with 110ns rise and 55ns fall times into 1nF load, supporting fast-switching MOSFETs and slower IGBTs. Gate drive voltage swing is rail-to-rail (0 to VBIAS), compatible with standard 10–15V gate drive requirements.
What happens during a lamp removal event?
When lamp is removed, SD/EOL pin voltage rises above 4.5V, triggering immediate shutdown and UVLO-mode quiescent current (≈400µA). The IC remains latched off until VCC drops below 9.5V and recovers above 11.5V - preventing automatic restart without manual intervention.
IR2166S Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- PFC/Ballast Controller
- Frequency:
- 39kHz ~ 50kHz
- Voltage - Supply:
- 10V ~ 17V
- 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:
- 16-SOIC
IR2166S FAQ
1.How can I place an order for IR2166S through Aetrix?
Please submit a Request for Quotation (RFQ) for IR2166S 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 IR2166S reliable?
The price and inventory of IR2166S are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR2166S is usually 5 days.
3.What payment methods are accepted for IR2166S?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR2166S transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IR2166S?
IR2166S orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IR2166S 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 IR2166S?
For technical support, including IR2166S datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR2166S requirements.
6.How does Aetrix verify that IR2166S is sourced from the original manufacturer or authorized distributors?
All IR2166S 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 IR2166S meets industry standards.
7.What is the process for return or replacement of IR2166S?
All IR2166S units undergo pre-shipment inspection (PSI). If there is an issue with IR2166S, 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 IR2166S part is unused and in its original packaging.
Return procedure for IR2166S:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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