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Infineon Technologies IR1166STRPBF
- Part No.:
- IR1166STRPBF
- Manufacturer:
- Infineon Technologies
- Category:
- Gate Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
IR1166STRPBF.pdf
- Description:
- IC GATE DRVR LOW-SIDE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,285
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Product details
Overview
IR1166STRPBF 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, 10.7 V gate drive clamp, and 35 ns turn-off propagation delay. It drives N-channel MOSFETs to replace Schottky diodes in high-efficiency AC-DC adapters and server SMPS.
For engineers reviewing the IR1166STRPBF datasheet, IR1166STRPBF pinout, IR1166STRPBF application, or IR1166STRPBF equivalent, key selection criteria include differential drain-voltage sensing accuracy, 4 A sink current capability, UVLO thresholds (9.0 V turn-on / 9.0 V hysteresis), anti-bounce logic for noise immunity, and SOIC-8 package compatibility with thermal resistance of 128 °C/W.
Technical Context
The IR1166STRPBF implements zero-current-transition detection via differential sensing of MOSFET drain-to-source voltage (VD–VS), enabling precise timing of SR turn-on/off across variable-frequency and fixed-frequency flyback topologies. Its internal comparator features programmable blanking (9–25 µs), double-pulse suppression, and three-turn-on threshold modes dependent on OVT pin state.
It integrates a micropower start-up circuit with 92 µA start-up current, ultra-low 145 µA sleep current at EN=0V, and a regulated 10.7 V gate driver output clamped internally. The driver delivers +1 A source / –4 A sink peak current with 52 ns turn-on and 35 ns turn-off propagation delays under 12 V VCC and 10 nF load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VD Rating | 200 V max pulse - supports primary-side-referred secondary rectification in 19 V–24 V output, 100 W+ flyback designs |
| VCC Range | 11.4–18 V operating - enables direct bias from auxiliary winding without external LDO in most adapter topologies |
| Gate Drive Clamp | 10.7 V typical - prevents MOSFET overdrive while ensuring full enhancement of low-RDS(on) N-ch devices |
| tDoff | 35 ns typ. - minimizes reverse conduction loss during transition by enabling fast SR turn-off before primary re-conduction |
| IO(sink) | 4 A peak - ensures rapid discharge of ≥10 nF gate capacitance for sub-100 ns effective turn-off in high-frequency CrCM |
| Blanking Time | 9–25 µs adjustable - suppresses false triggering from transformer ringing and EMI in high-noise SMPS environments |
| Quiescent Current | 2.2 mA typ. at 400 kHz - maintains efficiency >89% in 1 W standby mode per Energy Star v2.0 requirements |
Pinout & Package
IR1166STRPBF is housed in an 8-lead SOIC (SOIC-8N) package with standard JEDEC MS-012AC footprint, thermal resistance RΘJA = 128 °C/W under board-mounted still-air conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Supply input | Accepts 11.4–18 V; powers internal regulator and gate driver; UVLO triggers at 9.0 V |
| VD (Pin 5) | Drain sense input | Differential high-side sense node for MOSFET drain; withstands up to 200 V pulse |
| VS (Pin 6) | Source sense input | Reference for VD–VS differential comparison; connects to SR MOSFET source |
| MOT (Pin 3) | Gate drive output | Push-pull driver delivering +1 A / –4 A; clamped at 10.7 V; 52 ns tDon, 35 ns tDoff |
| OVT (Pin 2) | Overvoltage threshold select | Configures turn-on threshold: 0 V → –7 mV, floating → –10.3 mV, VCC → –15 mV |
| EN (Pin 4) | Enable control | Active-high logic input; 2.15–3.2 V high threshold; pulls up internally at 1.5 MΩ |
| GND (Pin 7) | Power ground | Return path for gate driver and internal circuits; must be low-inductance connection to SR source |
| VGATE (Pin 8) | Gate drive return | Separate Kelvin return for gate loop; reduces noise coupling into sensitive sense inputs |
Key Features
| Feature | Design Value |
|---|---|
| Differential VDS sensing | Enables accurate zero-current detection independent of MOSFET RDS(on) drift and temperature variation |
| Programmable blanking window | Adjustable 9–25 µs delay prevents false triggering from transformer leakage spikes in high-power flybacks |
| Triple-threshold OVT pin | Selects optimal turn-on sensitivity for different MOSFET VTH and layout parasitics without external components |
| Ultra-low sleep current | 145 µA at EN=0V enables <30 mW no-load consumption in Energy Star-compliant adapters |
| Integrated gate clamp | 10.7 V internal clamp eliminates need for external Zener, reducing BOM count and layout area |
Applications
| LCD/LED TV Power Supply | Server SMPS Secondary Side |
|---|---|
Use Scenario: 24 V/5 A isolated flyback supplying main logic board in 4K LCD TV with <1 W standby requirement. IC Role / Device Role / Timing Role: Synchronous rectifier controller detecting VDS polarity to replace 40 V Schottky diode; enables CrCM operation at 120 kHz. Use Value: Reduces secondary conduction loss by 65% vs. diode, improving full-load efficiency from 85% to 91.2% and meeting CECP Tier 2. | Use Scenario: Dual-output (12 V/3.3 V) flyback in 1U server PSU delivering 150 W with tight regulation and low acoustic noise. IC Role / Device Role / Timing Role: Controls paralleled N-MOSFETs on 12 V rail; uses OVT pin to optimize turn-on for 3.8 mΩ devices under high dV/dt. Use Value: Achieves 0.8°C lower MOSFET junction temperature vs. discrete gate driver + comparator solution, extending reliability beyond 100 khr MTBF. |
| USB-C PD Adapter (65 W) | Telecom Wall Adapter (24 V/2 A) |
Use Scenario: Compact 65 W GaN-based flyback with variable switching frequency (60–250 kHz) and dynamic load steps. IC Role / Device Role / Timing Role: Provides adaptive blanking and double-pulse suppression to maintain stable SR operation during transient load jumps from 0–5 A. Use Value: Eliminates output voltage overshoot >150 mV during 5 A step load, meeting USB-IF PD 3.0 ripple spec (<100 mV p-p). | Use Scenario: Telecom-grade 24 V/2 A wall adapter requiring -40°C to +70°C operation and 10-year field life. IC Role / Device Role / Timing Role: Drives 100 V N-MOSFET with 12 mΩ RDS(on); leverages 200 V VD rating to tolerate reflected transients up to 180 V. Use Value: Maintains >87% efficiency at 25% load across full temperature range, exceeding IEC 62301 Class B standby limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous rectifier controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP6908GJ-Z | Lower VD rating (100 V), integrated 5 V LDO, no OVT pin adjustment | Suitable only for ≤12 V output flybacks; lacks flexibility for high-VOUT or high-dV/dt layouts | Prefer for cost-sensitive 5–12 V adapters where 200 V tolerance is unnecessary |
| UCC24612-2QDR | Higher gate drive (6 A sink), wider VCC (4.5–36 V), automotive AEC-Q100 qualified | Requires external VCC regulation above 20 V; adds 0.3 mm height due to QFN-9 package | Prefer for automotive infotainment PSUs needing extended temp range and ASIL-B compliance |
Compared with MP6908GJ-Z and UCC24612-2QDR, IR1166STRPBF uniquely balances 200 V robustness, SOIC-8 manufacturability, and triple-threshold adaptability-making it optimal for industrial and telecom flybacks where layout-induced noise and wide output voltage ranges demand precision sensing without added components.
Availability
IR1166STRPBF is available at Aetrix Electronics and suitable for LCD TV power supplies, server SMPS secondary sides, and USB-C PD adapters requiring stable component supply, long-term lifecycle support, and RoHS-compliant lead-free packaging.
Supply support for IR1166STRPBF 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 global semiconductor leader specializing in power management, sensor, and automotive ICs, with core expertise in high-voltage analog and mixed-signal control solutions.
The IR1166S product line was developed specifically for high-efficiency secondary-side synchronous rectification in isolated flyback converters, targeting energy-critical applications such as Energy Star-compliant adapters and telecom power systems.
FAQ
What is the minimum recommended gate resistor for IR1166STRPBF when driving a 10 nF MOSFET gate?
A 0 Ω resistor is acceptable due to the IC's internal 5 Ω pull-up and 1.2 Ω pull-down drivers, but a 1–2 Ω series resistor is recommended to dampen potential gate oscillation in high-parasitic layouts. The 4 A sink current ensures <20 ns effective fall time even with 2 Ω + 10 nF, maintaining clean zero-current switching.
Can IR1166STRPBF operate with VCC derived directly from an auxiliary winding without an LDO?
Yes - its 11.4–18 V operating range and 9.0 V UVLO threshold allow direct connection to a well-regulated auxiliary winding. At light loads, VCC may dip near 11.4 V; adding a 10 µF ceramic capacitor at Pin 1 ensures stable operation during transient dips without external regulation.
How does the OVT pin affect turn-on timing in high-noise telecom SMPS designs?
Connecting OVT to VCC selects the –15 mV turn-on threshold, increasing noise margin against false triggering from 500 V/µs dV/dt events. This setting raises the effective VDS detection threshold, delaying turn-on slightly but preventing premature conduction during transformer ringback - critical for 24 V/2 A telecom adapters.
Is IR1166STRPBF compatible with paralleled MOSFET configurations?
Yes - its +1 A source / –4 A sink gate drive and low 52/35 ns propagation delays support driving multiple paralleled N-MOSFETs. Layout best practice requires matched gate trace lengths and individual 1 Ω gate resistors per device to ensure simultaneous switching and prevent current imbalance.
IR1166STRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- SmartRectifier™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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
IR1166STRPBF FAQ
1.How can I place an order for IR1166STRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for IR1166STRPBF 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 IR1166STRPBF reliable?
The price and inventory of IR1166STRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR1166STRPBF is usually 5 days.
3.What payment methods are accepted for IR1166STRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR1166STRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IR1166STRPBF?
IR1166STRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IR1166STRPBF 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 IR1166STRPBF?
For technical support, including IR1166STRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR1166STRPBF requirements.
6.How does Aetrix verify that IR1166STRPBF is sourced from the original manufacturer or authorized distributors?
All IR1166STRPBF 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 IR1166STRPBF meets industry standards.
7.What is the process for return or replacement of IR1166STRPBF?
All IR1166STRPBF units undergo pre-shipment inspection (PSI). If there is an issue with IR1166STRPBF, 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 IR1166STRPBF part is unused and in its original packaging.
Return procedure for IR1166STRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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