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Infineon Technologies IR1169SPBF
- Part No.:
- IR1169SPBF
- Manufacturer:
- Infineon Technologies
- Category:
- Gate Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
IR1169SPBF.pdf
- Description:
- IC GATE DRVR LOW-SIDE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,966
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Product details
Overview
IR1169SPBF from Infineon Technologies (formerly International Rectifier) is a secondary-side synchronous rectifier controller IC for isolated DC-DC converters, supporting Flyback, Forward, and Half-bridge topologies in both CCM and DCM modes. It delivers 1 A peak gate-source drive current, 4 A peak sink current, 50 ns turn-off propagation delay, 10.7 V internally clamped gate drive voltage, and operates with VCC from 11 V to 20 V. It enables Schottky-diode replacement in telecom and server SMPS.
For engineers reviewing the IR1169SPBF datasheet, IR1169SPBF pinout, IR1169SPBF application, or IR1169SPBF equivalent, key selection criteria include its differential VDS sensing architecture, cycle-by-cycle MOT check circuit, SYNC-driven CCM control, and 200 V drain-sense capability - all critical for high-efficiency, noise-immune SR design in energy-compliant AC-DC adapters.
Technical Context
The IR1169SPBF implements dual-threshold differential VDS sensing with programmable blanking (9–25 µs) and double-pulse suppression to prevent false triggering during transient noise events. Its gate driver integrates internal 10.7 V clamp and delivers asymmetric drive strength: +1 A source / −4 A sink into 10 nF load.
It features a dedicated MOT pin with 5–75 kΩ resistor programmability for minimum on-time control (180–3600 ns), and an enable input synchronized to VDS transitions to eliminate shoot-through risk. The IC uses capacitor-coupled primary-side communication via SYNC, eliminating optocouplers in CCM operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VD Sense Range | −3 V to +200 V: supports high-voltage secondary-side sensing without external level shifters |
| Turn-off Prop Delay | 50 ns typ.: enables precise zero-current switching timing in >300 kHz designs |
| Gate Drive Clamp | 10.7 V: prevents MOSFET overdrive while ensuring full enhancement of logic-level N-channel devices |
| IO Sink/Source | −4 A / +1 A peak: drives paralleled MOSFETs with fast turn-off critical for multi-phase SR layouts |
| VCC Range | 11 V to 20 V: compatible with auxiliary winding regulation schemes across wide input line conditions |
| Min On-Time Control | 180–3600 ns via RMOT: prevents premature turn-on during light-load DCM and ensures stable CCM boundary operation |
| UVLO Threshold | 9.4 V turn-on / 8.6 V turn-off: provides clean power sequencing and brown-out immunity |
Pinout & Package
IR1169SPBF is housed in an 8-lead SOIC package (SOIC-8N) with standard JEDEC MS-012AC footprint and 1.27 mm pitch. Thermal resistance θJA = 128 °C/W under board-mounted, still-air conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Supply input | Internal regulator input; requires local 100 nF bypass to GND; powers all internal blocks |
| GATE (Pin 2) | Gate drive output | Drives N-MOSFET gate directly; clamped at 10.7 V; sinks up to 4 A for fast turn-off |
| SYNC (Pin 3) | CCM control input | Active-low signal from primary controller to force synchronous MOSFET turn-off in continuous conduction mode |
| MOT (Pin 4) | Minimum on-time programming | Resistor-connected pin setting blanking window and minimum conduction time (5–75 kΩ range) |
| EN (Pin 5) | Enable input | Logic-level enable synchronized to VDS transition; avoids gate drive during MOSFET overlap |
| GND (Pin 6) | Signal ground reference | Analog and digital ground return; must be low-impedance connection to power ground plane |
| VS (Pin 7) | Source sense input | Differential input referenced to GND; senses MOSFET source node for current polarity detection |
| VD (Pin 8) | Drain sense input | Differential input referenced to VS; withstands up to 200 V transient; enables direct high-side sensing |
Key Features
| Feature | Design Value |
|---|---|
| Cycle-by-cycle MOT check | Prevents multiple false gate pulses per switching cycle by validating valid VDS transitions before enabling drive |
| Differential VDS sensing | Rejects common-mode noise up to ±2 V on VD/VS inputs, enabling reliable zero-current detection in noisy SMPS environments |
| Capacitor-coupled SYNC interface | Eliminates optocoupler and associated bias circuitry in CCM designs, reducing BOM count and layout area |
| Programmable blanking window | 9–25 µs adjustable via RMOT, suppressing gate drive during MOSFET turn-on/drain ringing without compromising efficiency |
| UVLO with hysteresis | 1.1 V hysteresis between 9.4 V turn-on and 8.6 V turn-off ensures stable startup and shutdown under varying auxiliary winding regulation |
Applications
| Telecom SMPS | Server SMPS |
|---|---|
Use Scenario: 48 V input, 12 V/50 A output isolated DC-DC module in 19-inch rack power shelf. IC Role / Device Role / Timing Role: Secondary-side synchronous rectifier controller managing paralleled 30 V N-MOSFETs with cycle-by-cycle MOT validation. Use Value: Achieves >95% efficiency at full load by replacing Schottky diodes and eliminating reverse recovery losses. | Use Scenario: Redundant 12 V/200 A VRM in hyperscale data center server PSU with tight thermal constraints. IC Role / Device Role / Timing Role: High-speed SR driver with 50 ns turn-off delay and 4 A sink current enabling <100 ns dead-time control. Use Value: Reduces MOSFET conduction loss by 40% vs. diode rectification, lowering heatsink mass and improving power density. |
| ATX SMPS | Energy Star Adapters |
Use Scenario: Dual-rail +12 V/+5 V ATX power supply for desktop PCs requiring <0.5 W no-load consumption. IC Role / Device Role / Timing Role: Low-quiescent-current (1.8 mA) SR controller operating in DCM at light loads with micropower start-up. Use Value: Enables compliance with 80 PLUS Titanium requirements by minimizing standby losses without sacrificing dynamic response. | Use Scenario: 65 W laptop adapter meeting Energy Star v6.0 and CECP Tier 2 efficiency standards. IC Role / Device Role / Timing Role: CCM-capable SR controller using SYNC input from primary-side PWM IC to coordinate turn-off timing. Use Value: Delivers >93% average efficiency across 10–100% load range by eliminating diode forward drop and reverse recovery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous rectifier controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCC24612DR | Higher VDS rating (250 V), integrated adaptive dead-time control, lower quiescent current (600 µA) | Better suited for high-input-voltage offline adapters (>300 VAC) and ultra-low standby designs | Select when >200 V drain sensing or sub-1 mW sleep power is required |
| MP6908GJ-Z | Single-supply operation (4.5–32 V), faster turn-off (35 ns), no external MOT resistor needed | Optimized for compact USB PD adapters with aggressive size constraints and high-frequency operation | Select when board space is limited and 500 kHz+ switching with minimal external components is prioritized |
Compared with UCC24612DR and MP6908GJ-Z, the IR1169SPBF offers superior noise immunity via programmable blanking and proven robustness in high-noise telecom/server environments, but requires more external components and lacks adaptive dead-time tuning.
Availability
IR1169SPBF is available at Aetrix Electronics and suitable for telecom SMPS, server SMPS, and Energy Star-compliant AC-DC adapters requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for IR1169SPBF 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, automotive, and industrial control solutions, with deep expertise in high-voltage analog and mixed-signal ICs.
The IR1169 product line was developed specifically for high-efficiency secondary-side synchronous rectification in isolated switch-mode power supplies, targeting replacement of Schottky diodes in Flyback, Forward, and Half-bridge topologies.
FAQ
What is the maximum recommended switching frequency for IR1169SPBF?
The IR1169SPBF is rated for up to 500 kHz operation, verified under typical conditions with CLOAD = 10 nF and VCC = 15 V. At this frequency, propagation delays (50 ns turn-off, 70 ns turn-on) and blanking window settings ensure reliable zero-current switching without false triggering. Operation above 500 kHz may compromise noise immunity and timing margin.
How does the MOT pin affect minimum on-time behavior?
The MOT pin sets minimum on-time (180–3600 ns) and blanking duration (9–25 µs) via an external resistor (5–75 kΩ). Lower RMOT reduces both parameters, preventing premature turn-on in DCM; higher values extend blanking to suppress noise-induced false triggers in high-dV/dt environments like server SMPS.
Can IR1169SPBF drive multiple paralleled MOSFETs?
Yes - the IR1169SPBF's −4 A peak sink current and +1 A source current are designed to drive multiple paralleled N-channel MOSFETs. Layout best practices require matched gate trace lengths, Kelvin source connections, and individual gate resistors to ensure balanced turn-on/turn-off and avoid current imbalance or oscillation.
Is external UVLO circuitry required for IR1169SPBF?
No - IR1169SPBF includes internal UVLO with 9.4 V turn-on threshold and 8.6 V turn-off threshold (1.1 V hysteresis). This eliminates need for external supervision circuits. However, VCC must be supplied from a stable auxiliary winding or bias supply capable of delivering ≥10 mA under full load to sustain regulation.
IR1169SPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- Advanced Smart Rectifier™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Programmable:
- Not Verified
- Driven Configuration:
- Low-Side
- Channel Type:
- Single
- Number of Drivers:
- 1
- Gate Type:
- N-Channel MOSFET
- Voltage - Supply:
- 11V ~ 19V
- Logic Voltage - VIL, VIH:
- 2V, 2.25V
- Current - Peak Output (Source, Sink):
- 1A, 4A
- Input Type:
- Inverting
- High Side Voltage - Max (Bootstrap):
- -
- Rise / Fall Time (Typ):
- 20ns, 10ns
- Operating Temperature:
- -25°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
IR1169SPBF FAQ
1.How can I place an order for IR1169SPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for IR1169SPBF 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 IR1169SPBF reliable?
The price and inventory of IR1169SPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR1169SPBF is usually 5 days.
3.What payment methods are accepted for IR1169SPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR1169SPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IR1169SPBF?
IR1169SPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IR1169SPBF 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 IR1169SPBF?
For technical support, including IR1169SPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR1169SPBF requirements.
6.How does Aetrix verify that IR1169SPBF is sourced from the original manufacturer or authorized distributors?
All IR1169SPBF 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 IR1169SPBF meets industry standards.
7.What is the process for return or replacement of IR1169SPBF?
All IR1169SPBF units undergo pre-shipment inspection (PSI). If there is an issue with IR1169SPBF, 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 IR1169SPBF part is unused and in its original packaging.
Return procedure for IR1169SPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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