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Infineon Technologies IR1161LTRPBF
- Part No.:
- IR1161LTRPBF
- Manufacturer:
- Infineon Technologies
- Category:
- Power Supply Controllers, Monitors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
IR1161LTRPBF.pdf
- Description:
- SYNCRONOUS RECTIFIER CONTROL IC
- Quantity:
- Payment:
- Shipping:
Inventory:20,202
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Product details
Overview
IR1161LTRPBF from Infineon Technologies is a secondary-side synchronous rectification controller IC for flyback and resonant half-bridge AC-DC converters, featuring 50ns turn-off propagation delay, direct 200V drain-voltage sensing, and cycle-by-cycle minimum on-time (MOT) protection. It drives N-channel MOSFETs to replace output diodes in chargers and adapters, reducing conduction losses at light and full load.
For engineers reviewing the IR1161LTRPBF datasheet, IR1161LTRPBF pinout, IR1161LTRPBF application, or IR1161LTRPBF equivalent, key selection criteria include VD sensing range (–3V to 200V), MOT programmability via external resistor (5–100kΩ), gate drive capability (±1A/±2.5A), UVLO thresholds (4.15V/4.75V), and SOT-23-5 package compatibility with high-density adapter layouts.
Technical Context
The IR1161LTRPBF implements adaptive zero-current switching detection by monitoring VD with dual comparators (VTH1 = –4mV typ., VTH2 = –230mV typ.) and integrated blanking (8–24µs) to suppress noise-induced false triggering. Its arming logic and reset circuitry ensure reliable gate timing across DCM, CrCM, and resonant modes up to 500kHz.
It integrates a cycle-by-cycle MOT check that disables the gate driver under no-load conditions by detecting negative current flow, preventing reverse conduction. The gate driver delivers 1A source / 2.5A sink peak current with 60ns typical turn-on and 50ns typical turn-off propagation delay referenced to VDS transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology Support | Flyback (DCM/CrCM) and resonant half-bridge - enables high-efficiency secondary-side SR in compact adapters. |
| VD Sensing Range | –3V to 200V - supports direct high-side drain sensing without auxiliary winding or isolated gate drive. |
| VCC Operating Range | 4.75V to 18V - powers from auxiliary winding or local LDO, compatible with wide-input AC-DC designs. |
| Gate Drive Current | +1A source / –2.5A sink - ensures fast MOSFET turn-on/turn-off with low RDS(on) N-ch devices. |
| Propagation Delay | tDoff = 50ns typ. - minimizes body-diode conduction time, critical for <100mW standby compliance. |
| MOT Programmability | 80–1200ns via RMOT (5–100kΩ) - prevents shoot-through and enables stable operation down to zero load. |
| Quiescent Current | 0.65–1.1mA - sustains ultra-low standby power (<0.3W) required by Energy Star v3.0 and CECP. |
Pinout & Package
IR1161LTRPBF is housed in a RoHS-compliant 5-pin SOT-23 package (JEDEC MO-178AA), optimized for surface-mount assembly in space-constrained AC-DC adapters.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Supply input | Power rail for internal circuitry; requires ≥1µF decoupling capacitor near pin. |
| 2 - GATE | Gate driver output | Drives N-MOSFET gate directly; ±1A/±2.5A peak drive supports fast switching. |
| 3 - GND | Ground reference | Common return for VCC, VD, and gate drive; must be low-inductance connection to PCB ground plane. |
| 4 - VD | Drain voltage sense | Direct high-side sensing node; withstands –3V to 200V transients with built-in ESD protection. |
| 5 - MOT | Minimum on-time control | Resistor-programmed input setting MOT duration; determines no-load shutdown threshold. |
Key Features
| Feature | Design Value |
|---|---|
| Direct VD sensing up to 200V | Eliminates need for auxiliary winding or optocoupler feedback, simplifying transformer design and reducing BOM cost. |
| Cycle-by-cycle MOT protection | Prevents reverse current flow during no-load or light-load conditions, ensuring compliance with <0.3W standby standards. |
| 50ns turn-off propagation delay | Minimizes body-diode conduction time in high-frequency flyback, directly improving efficiency at 230VAC/10% load. |
| Ultra-low quiescent current (0.65mA) | Enables <0.3W no-load power consumption without auxiliary bias supply or complex wake-up circuitry. |
| Integrated anti-bounce logic & UVLO | Ensures clean startup and prevents erratic gate toggling during brown-out or transient VCC dips. |
Applications
| USB-C PD Charger | Laptop Adapter |
|---|---|
Use Scenario: 65W USB-C Power Delivery adapter operating in CrCM flyback mode with 90–264VAC input. IC Role / Device Role / Timing Role: Secondary-side synchronous rectifier controller enabling zero-voltage turn-on of N-MOSFET on +20V output rail. Use Value: Reduces output rectifier loss by >40% vs. Schottky diode, achieving >94% efficiency at 50% load and <0.25W no-load consumption. | Use Scenario: 90W universal-input laptop adapter using resonant half-bridge topology with 19.5V/4.6A output. IC Role / Device Role / Timing Role: High-speed gate driver coordinating with primary-side controller to eliminate body-diode conduction during dead-time intervals. Use Value: Enables 100kHz+ operation with <50ns timing precision, meeting CoC Tier 2 and Energy Star 3.0 standby requirements. |
| Smartphone Wall Adapter | IoT Power Supply |
Use Scenario: Compact 18W smartphone charger with folded PCB layout and 5V/3A output. IC Role / Device Role / Timing Role: SOT-23-5 synchronous rectifier controller replacing 40V Schottky, driven by VD sensing on secondary-side MOSFET drain. Use Value: Achieves 0.22W no-load power via micropower start-up and 0.65mA IQ, satisfying EU CoC v5 Level VI limits. | Use Scenario: Low-power IoT gateway with dual-output (5V/3.3V) flyback converter and strict thermal constraints. IC Role / Device Role / Timing Role: Secondary-side SR controller with programmable MOT and 200V VD tolerance, supporting wide-output-voltage designs. Use Value: Allows use of low-RDS(on) 30V MOSFETs on 5V rail while maintaining robustness against 200V transients on VD node. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous rectification controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor NCP4306DR2G | Higher VD rating (250V), fixed 120ns MOT, no MOT programming pin | Requires external RC network for MOT tuning; less flexible for multi-output designs | Preferred when higher VD margin is needed and MOT flexibility is not required |
| Diodes Incorporated AP4313KTR-G1 | Supports both N- and P-channel MOSFETs; 65ns tDoff; 3.3–18V VCC range | Broader VCC range enables direct bias from 3.3V rails; lacks cycle-by-cycle MOT check | Chosen for mixed-channel topologies or where ultra-low VCC start-up is critical |
Compared with NCP4306DR2G and AP4313KTR-G1, IR1161LTRPBF uniquely combines programmable MOT, 50ns turn-off delay, and direct 200V VD sensing in SOT-23-5-making it optimal for cost-sensitive, high-efficiency single-output adapters targeting <0.3W standby.
Availability
IR1161LTRPBF is available at Aetrix Electronics and suitable for USB-C PD chargers, laptop adapters, smartphone wall adapters, and IoT power supplies requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for IR1161LTRPBF 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 leader specializing in power management, automotive, and industrial control ICs, with core expertise in high-voltage analog and mixed-signal design.
The IR1161 product line delivers secondary-side synchronous rectification controllers optimized for energy-efficient AC-DC conversion in consumer and computing power supplies, targeting global efficiency standards including Energy Star, CECP, and CoC Tier 2.
FAQ
What is the maximum recommended switching frequency for IR1161LTRPBF?
The IR1161LTRPBF is rated for operation up to 500kHz, verified across DCM, CrCM flyback, and resonant half-bridge topologies. At 500kHz, its 50ns turn-off propagation delay and 8–24µs blanking window maintain reliable zero-current switching detection without false triggering from ringing or noise.
Can IR1161LTRPBF drive P-channel MOSFETs?
No - IR1161LTRPBF is designed exclusively for N-channel MOSFETs. Its gate driver outputs a high-side referenced signal relative to GND, and the internal logic assumes low-side gate drive configuration with VD sensing on the MOSFET drain. P-channel support requires complementary architecture found in devices like AP4313KTR-G1.
How does the MOT pin function, and what resistor value sets 200ns minimum on-time?
The MOT pin accepts an external resistor (RMOT) to set minimum on-time between 80ns and 1200ns. Per datasheet Figure 10, RMOT = 24kΩ yields ~500ns MOT; RMOT = 50kΩ yields ~1µs. For 200ns, RMOT ≈ 12kΩ is required - confirmed by linear interpolation of published test data across 5kΩ–100kΩ range.
Is IR1161LTRPBF pin-compatible with IR1161LPBF?
Yes - IR1161LTRPBF and IR1161LPBF share identical pinout, electrical specifications, and SOT-23-5 packaging. The "TR" suffix denotes tape-and-reel packaging (3000 pcs/reel), while "LPBF" indicates same device in standard packaging; both are functionally and mechanically interchangeable in PCB layout.
IR1161LTRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- SmartRectifier™
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Programmable:
- Not Verified
- Applications:
- Secondary-Side Controller, Synchronous Rectifier
- Voltage - Input:
- -
- Voltage - Supply:
- 4.75V ~ 18V
- Current - Supply:
- 5 mA
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-SOT23-5
IR1161LTRPBF FAQ
1.How can I place an order for IR1161LTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for IR1161LTRPBF 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 IR1161LTRPBF reliable?
The price and inventory of IR1161LTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR1161LTRPBF is usually 5 days.
3.What payment methods are accepted for IR1161LTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR1161LTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IR1161LTRPBF?
IR1161LTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IR1161LTRPBF 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 IR1161LTRPBF?
For technical support, including IR1161LTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR1161LTRPBF requirements.
6.How does Aetrix verify that IR1161LTRPBF is sourced from the original manufacturer or authorized distributors?
All IR1161LTRPBF 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 IR1161LTRPBF meets industry standards.
7.What is the process for return or replacement of IR1161LTRPBF?
All IR1161LTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with IR1161LTRPBF, 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 IR1161LTRPBF part is unused and in its original packaging.
Return procedure for IR1161LTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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