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Infineon Technologies IR1166SPBF
- Part No.:
- IR1166SPBF
- Manufacturer:
- Infineon Technologies
- Category:
- Gate Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
IR1166SPBF.pdf
- Description:
- IC GATE DRVR LOW-SIDE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,703
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Product details
Overview
IR1166SPBF from Infineon Technologies (formerly International Rectifier) is a secondary-side synchronous rectifier controller IC for flyback converters, supporting DCM/CrCM/CCM operation with 200 V drain-sense capability, 500 kHz max switching frequency, and ±1 A / −4 A gate drive output. It enables Schottky-diode replacement in AC-DC adapters and server SMPS.
For engineers reviewing the IR1166SPBF datasheet, IR1166SPBF pinout, IR1166SPBF application, or IR1166SPBF equivalent, key selection criteria include differential drain-voltage sensing accuracy, 35 ns turn-off propagation delay, 10.7 V gate-drive clamp, UVLO hysteresis of 1.57 V, and SOIC-8 compatibility with high-noise flyback environments.
Technical Context
The IR1166SPBF implements zero-current-transition detection via differential VDS sensing across the SR MOSFET, using dual comparators with programmable thresholds (VTH1 = −7 mV to −23 mV, VTH2 = −150 mV) and adaptive blanking (9–25 µs). Its internal regulator supports 11.4–18 V VCC operation with 2.2 mA quiescent current and 200 µA start-up current.
Gate drive features include 1 A source / 4 A sink peak current, 10.7 V clamped high-side output, 52 ns turn-on / 35 ns turn-off propagation delays (VDS-to-VGATE), and minimum on-time control (190–290 ns) set by RMOT. The IC integrates anti-bounce logic, double-pulse suppression, and OVT fault monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VD Sense Range | −5 V to 200 V pulse; enables direct high-side SR MOSFET drain monitoring without auxiliary winding |
| Max Switching Frequency | 500 kHz; supports high-density, high-efficiency flyback designs up to 150 W |
| VCC Operating Range | 11.4 V to 18 V; ensures stable operation across wide input line variations in universal AC adapters |
| Gate Drive Clamp | 10.7 V typical; prevents MOSFET overdrive while maintaining sufficient VGS for low RDS(on) conduction |
| Turn-off Propagation Delay | 35 ns typical; reduces body diode conduction time and associated losses in high-frequency flyback |
| Quiescent Current | 2.2 mA typical at 15 V VCC; meets <100 mW no-load power requirements for Energy Star 6.0 |
| Start-up Current | 200 µA maximum; allows direct VCC biasing from high-impedance startup networks |
Pinout & Package
IR1166SPBF is housed in an 8-lead SOIC package (SOIC-8N, JEDEC MS-012AC), with exposed pad not electrically connected. Thermal resistance RΘJA = 128 °C/W under board-mounted still-air conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Supply input | Internal LDO input; requires 11.4–18 V with ≥10 µF local ceramic bypass |
| VGATE (Pin 8) | Gate driver output | Clamped 10.7 V push-pull output driving SR MOSFET gate directly |
| VD (Pin 5) | Drain voltage sense | Differential high-side sense input referenced to VS; withstands 200 V transients |
| VS (Pin 6) | Source voltage sense | Low-side reference for VDS measurement; connects to SR MOSFET source |
| MOT (Pin 3) | Minimum on-time resistor | External resistor sets minimum conduction time (190–290 ns) to prevent shoot-through |
| OVT (Pin 2) | Overvoltage threshold | Configures comparator trip point for VDS overvoltage protection (e.g., transformer reset spike) |
| EN (Pin 4) | Enable control | Active-high logic input; 2.15–3.2 V high threshold enables operation; pulls up internally at 1.5 MΩ |
| GND (Pin 7) | Power ground | Common return for VCC, VGATE, and sense circuitry; must be low-inductance connection to PCB ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Differential VDS sensing | Rejects common-mode noise up to 200 V, enabling reliable zero-current switching in high-dV/dt flyback secondaries |
| Programmable blanking window | 9–25 µs adjustable via external capacitor; suppresses false triggering during MOSFET turn-on ringing |
| Double-pulse suppression | Prevents erroneous re-triggering during critical conduction mode transitions, ensuring single-pulse per cycle |
| UVLO with hysteresis | 11.3 V turn-on / 9.0 V turn-off (1.57 V hysteresis); avoids oscillation near brown-out thresholds |
| Micropower start-up | 200 µA max start-up current allows direct biasing from high-value resistive dividers without auxiliary winding |
Applications
| AC-DC Adapters | Server SMPS |
|---|---|
|
Use Scenario: 65 W universal-input laptop adapter operating in CrCM with 100 kHz–300 kHz variable frequency. IC Role / Device Role / Timing Role: Secondary-side SR controller detecting VDS zero-crossing to replace 40 V Schottky rectifier, reducing conduction loss by >40%. Use Value: Achieves >92% efficiency at full load and <75 mW no-load consumption, meeting DOE Level VI and Energy Star 6.0. |
Use Scenario: 500 W redundant ATX-style server PSU with dual forward/flyback hybrid topology. IC Role / Device Role / Timing Role: Controls paralleled 30 V N-MOSFETs on +12 V output rail, synchronizing turn-on with primary-side demagnetization. Use Value: Reduces secondary-side losses by 1.8 W per rail versus diode rectification, lowering thermal stress on output capacitors. |
| LCD TV Power Supply | Telecom SMPS |
|
Use Scenario: 120 W 24 V/5 A standby-capable LCD TV main supply operating in DCM at 65 kHz. IC Role / Device Role / Timing Role: Drives single 30 V SR MOSFET on 24 V output, using MOT resistor to enforce 250 ns minimum on-time. Use Value: Enables 1 W standby compliance with 145 µA sleep current when EN is pulled low during standby mode. |
Use Scenario: 48 V input, 5 V/20 A telecom brick operating in CCM with 250 kHz fixed frequency. IC Role / Device Role / Timing Role: Senses VDS across paralleled 40 V MOSFETs with OVT pin configured for 60 V overvoltage lockout. Use Value: Maintains stable SR operation despite 150 V transient spikes on isolated secondary, eliminating need for snubbers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar secondary-side synchronous rectifier controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP6908GJ-Z | Integrated 5 V LDO bias; lower 1.2 V VTH1 threshold; 45 ns tDoff; SOIC-8 with thermal pad | Requires external VCC bootstrap; better suited for low-VOUT (<12 V) designs due to tighter threshold tolerance | Preferred when designing for <10 V outputs or needing integrated bias regulation |
| NCP4303ADR2G | Fixed 100 ns blanking; no MOT pin; 60 ns tDoff; 12 V gate clamp; wider VCC range (4.5–32 V) | No minimum on-time adjustment; less flexible in CrCM/CCM boundary handling; higher gate clamp reduces RDS(on) margin | Select when simplicity and wide input range outweigh need for adaptive blanking or precise timing control |
Compared with MP6908GJ-Z and NCP4303ADR2G, IR1166SPBF offers superior noise immunity via programmable blanking and differential sensing, tighter propagation delay control for high-frequency CrCM, and proven robustness in 200 V drain-sense telecom and server applications.
Availability
IR1166SPBF is available at Aetrix Electronics and suitable for AC-DC adapters, server SMPS, and LCD TV power supplies requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for IR1166SPBF 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, with global manufacturing and qualification to AEC-Q100 and industrial standards.
The IR1166SPBF belongs to Infineon's SMARTRECTIFIER™ family, engineered specifically for high-efficiency secondary-side synchronous rectification in isolated flyback converters targeting energy-efficient consumer and telecom power systems.
FAQ
What is the recommended layout practice for VD and VS pins?
Route VD and VS as a tightly coupled differential pair with matched trace lengths and minimal loop area. Place 100 pF ceramic capacitors directly at the pins to GND to suppress RF coupling. Avoid routing near primary-side switching nodes or transformer windings to maintain noise immunity.
Can IR1166SPBF drive multiple paralleled MOSFETs?
Yes - the 4 A peak sink current and 1 A source current enable direct drive of up to three 30 V, 5 mΩ N-channel MOSFETs in parallel. Gate trace inductance must be minimized, and individual 10 Ω gate resistors are recommended to dampen ringing and ensure simultaneous switching.
How does the OVT pin affect protection behavior?
The OVT pin sets the VDS overvoltage threshold for automatic shutdown: when VD exceeds (VOVT + 15 V), the gate driver disables for 1 ms. With OVT tied to VCC, threshold is ~60 V; grounded, it's ~15 V - allowing configuration for different MOSFET voltage ratings and transformer reset margins.
Is IR1166SPBF compatible with quasi-resonant (QR) controllers?
Yes - its 500 kHz max frequency, 35 ns turn-off delay, and adaptive blanking support QR flyback operation. When paired with primary-side QR controllers like ICE2QS03G, the IC maintains accurate zero-current switching across variable frequency ranges without external frequency compensation.
IR1166SPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- SmartRectifier™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Driven Configuration:
- Low-Side
- Channel Type:
- Single
- Number of Drivers:
- 1
- Gate Type:
- N-Channel MOSFET
- Voltage - Supply:
- 11.4V ~ 18V
- Logic Voltage - VIL, VIH:
- 2V, 2.15V
- Current - Peak Output (Source, Sink):
- 1A, 4A
- Input Type:
- Non-Inverting
- High Side Voltage - Max (Bootstrap):
- -
- Rise / Fall Time (Typ):
- 21ns, 10ns
- Operating Temperature:
- -25°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
IR1166SPBF FAQ
1.How can I place an order for IR1166SPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for IR1166SPBF 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 IR1166SPBF reliable?
The price and inventory of IR1166SPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR1166SPBF is usually 5 days.
3.What payment methods are accepted for IR1166SPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR1166SPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IR1166SPBF?
IR1166SPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IR1166SPBF 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 IR1166SPBF?
For technical support, including IR1166SPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR1166SPBF requirements.
6.How does Aetrix verify that IR1166SPBF is sourced from the original manufacturer or authorized distributors?
All IR1166SPBF 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 IR1166SPBF meets industry standards.
7.What is the process for return or replacement of IR1166SPBF?
All IR1166SPBF units undergo pre-shipment inspection (PSI). If there is an issue with IR1166SPBF, 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 IR1166SPBF part is unused and in its original packaging.
Return procedure for IR1166SPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
IR1166SPBF Tags
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