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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Power Supply Controllers, Monitors

Infineon Technologies IR1168STRPBF

Name: IR1168STRPBF
Brand: Infineon Technologies
SKU: IR1168STRPBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IR1168STRPBF

Manufacturer:: Infineon Technologies

Category:: Power Supply Controllers, Monitors

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: IR1168STRPBF.pdf

Description:: IC SECONDARY SIDE CTRLR 8SOIC

Quantity:: RFQ Add To RFQ list

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Inventory:4,839

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Product details

Overview

IR1168STRPBF from International Rectifier is a dual smart secondary-side synchronous rectifier driver IC for LLC resonant half-bridge converters, featuring 200V drain-sense capability, 70ns turn-off propagation delay, 4A peak sink current, and 10.7V clamped gate drive-enabling high-efficiency replacement of Schottky diodes in AC-DC adapters and LCD TV power supplies.

For engineers reviewing the IR1168STRPBF datasheet, IR1168STRPBF pinout, IR1168STRPBF application, or IR1168STRPBF equivalent, key selection criteria include differential V_DS sensing accuracy, anti-bounce logic timing, UVLO thresholds (7.0–8.5V), gate drive clamp stability, and SOIC-8 thermal performance under 500kHz switching.

Technical Context

The IR1168STRPBF implements dual-channel independent sensing and control logic with separate VS1/VS2 and VD1/VD2 inputs to monitor two N-channel MOSFETs' drain-source voltages differentially. Its blanking pulse (9–25µs) and double-pulse suppression ensure noise-immune zero-current switching detection across fixed- and variable-frequency LLC topologies.

It integrates micropower start-up (140µA), ultra-low quiescent current (2.6–3.8mA), and internal gate voltage clamping at 10.7V, enabling direct drive of paralleled MOSFETs without external level-shifting or protection circuitry in high-density 12–19V output designs.

Key Specifications

Parameter	Value and Actual Design Meaning
V_D Rating	200V continuous - supports primary-side referenced synchronous rectification in 12–19V output LLC converters up to 400W
Gate Drive Clamp	10.7V typical - limits MOSFET V_GS to safe level without external Zener, compatible with 12V-rated logic-level MOSFETs
Turn-off Propagation Delay	70ns typical - enables precise zero-current turn-off timing critical for <500kHz resonant operation
Peak Sink Current	4A - ensures fast MOSFET turn-off even with 4.7nF gate capacitance (e.g., IPP65R099C7)
V_CC UVLO Threshold	7.0–8.0V - prevents erratic startup during brown-out conditions in universal-input AC-DC adapters
Quiescent Current	2.6–3.8mA - minimizes no-load power loss in energy-efficient PDP/LCD TV standby modes
Blanking Pulse Width	9–25µs - suppresses false triggering from ringing during MOSFET commutation in high-dV/dt LLC nodes

Pinout & Package

IR1168STRPBF is housed in an 8-lead SOIC package (SOIC-8N, MSL2, RoHS-compliant) with standard thermal pad layout and 128°C/W junction-to-ambient resistance under board-mounted still-air conditions.

Pin/Terminal	Circuit Role	Design Meaning
1 (LOAD)	Common source node connection	Reference point for both VS1 and VS2 inputs; ties to shared source of SR1/SR2 MOSFETs
2 (V_CC)	Supply input	Accepts 8.6–18V DC; powers internal logic and gate drivers; includes 7.0–8.5V UVLO hysteresis
3 (V_D1)	Drain sense input (Channel 1)	Differential input measuring V_DS of first SR MOSFET; rated –3V to +200V
4 (V_D2)	Drain sense input (Channel 2)	Differential input measuring V_DS of second SR MOSFET; shares same 200V rating and noise rejection
5 (V_S2)	Source sense input (Channel 2)	Connects to source of SR2; used with V_D2 to detect conduction direction and zero-crossing
6 (V_S1)	Source sense input (Channel 1)	Connects to source of SR1; forms differential pair with V_D1 for accurate current polarity detection
7 (GND)	Power ground reference	Return path for V_CC, gate drivers, and internal comparators; must be low-inductance PCB trace
8 (GATE1 / GATE2)	Output driver terminals	Two independent open-drain outputs with 1A source / 4A sink capability; each drives one SR MOSFET gate directly

Key Features

Feature	Design Value
Dual independent V_DS sensing	Enables simultaneous control of two SR MOSFETs in center-tapped or dual-output LLC secondaries without cross-talk
Anti-bounce logic + double-pulse suppression	Eliminates false turn-on caused by parasitic ringing during zero-voltage switching transitions
Micropower start-up (140µA)	Allows direct connection to auxiliary winding without dedicated start-up resistor, reducing BOM count
70ns turn-off propagation delay	Supports tight timing margins required for >300kHz LLC operation with minimal dead-time penalty
Internal 10.7V gate clamp	Removes need for external gate Zener diode, simplifying layout and improving reliability in high-volume adapter designs

Applications

LCD TV Power Supply

Telecom SMPS

Use Scenario: 12V/19V dual-rail output stage in 200–400W LCD backlight power supplies with universal AC input.

IC Role / Device Role / Timing Role: Dual-channel synchronous rectifier controller managing parallel N-MOSFETs on secondary side to replace 2×60V Schottky stacks.

Use Value: Achieves >94% efficiency at full load by eliminating 0.4V forward drop losses and reducing thermal stress on rectifiers.

Use Scenario: 48V output telecom rectifier module operating at 300–450kHz with strict hold-up time and ripple requirements.

IC Role / Device Role / Timing Role: Secondary-side gate driver coordinating two paralleled 100V MOSFETs per rail using differential V_DS sensing for precise ZCS detection.

Use Value: Reduces conduction loss by 65% vs. diode rectification while maintaining <10mVpp output ripple via fast 70ns turn-off response.

AC-DC Adapter (19V/3.42A)

PDP TV Main Power

Use Scenario: Compact 65W laptop adapter with 19V output, targeting CoC Tier 2 and DoE Level VI efficiency standards.

IC Role / Device Role / Timing Role: Smart SR driver replacing dual Schottky diodes in asymmetric half-bridge LLC topology with single transformer secondary.

Use Value: Enables 15mW no-load consumption via 2.6mA quiescent current and eliminates heatsink requirement for SR MOSFETs.

Use Scenario: 120–240W PDP TV main power supply requiring high reliability and low EMI in narrow board space.

IC Role / Device Role / Timing Role: Dual-channel SR controller driving two 150V MOSFETs per channel with integrated blanking to reject EMI from plasma panel switching noise.

Use Value: Improves thermal margin by 18°C over diode-based design while meeting CISPR-22 Class B conducted EMI limits.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual synchronous rectifier driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
UCC24612DR	Lower V_D rating (100V), 50ns t_OFF, integrated adaptive dead-time control	Better suited for lower-output-voltage (<12V) USB-PD and GaN-based adapters	Select when designing sub-100W GaN LLC with tighter timing control needs
MP6908GJ-Z	Single-channel only, 120V V_D, 80ns t_OFF, no dual sensing inputs	Requires two ICs for dual-SR implementation; higher component count and layout complexity	Choose only if legacy design uses MP6908 footprint and cost outweighs performance trade-offs

Compared with UCC24612DR and MP6908GJ-Z, IR1168STRPBF delivers superior 200V robustness and true dual-channel integration-making it optimal for high-output-voltage (>15V), high-power (>200W) industrial and display power supplies where single-package simplicity and noise immunity are critical.

Availability

IR1168STRPBF is available at Aetrix Electronics and suitable for LCD TV power supplies, telecom SMPS modules, and high-efficiency AC-DC adapters requiring stable component supply, long-term lifecycle support, and JEDEC Industrial-qualified reliability.

Supply support for IR1168STRPBF 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

International Rectifier (now part of Infineon Technologies since 2015) was a pioneer in power semiconductor innovation, specializing in high-performance analog and mixed-signal ICs for power conversion systems.

The IR1168 product line was developed specifically for high-frequency resonant converter topologies-targeting efficiency-critical secondary-side synchronous rectification in consumer display and telecom infrastructure power supplies.

FAQ

What is the maximum recommended switching frequency for IR1168STRPBF?

The IR1168STRPBF is characterized and guaranteed up to 500kHz, with typical turn-off propagation delay of 70ns and blanking pulse width of 9–25µs. At 450kHz, it maintains reliable zero-current switching detection in LLC converters with ≤200V V_DS swing and <50V/µs dV/dt. Operation beyond 500kHz risks missed turn-off events due to comparator recovery limitations.

Can IR1168STRPBF drive paralleled MOSFETs on a single channel?

Yes-each GATE1 and GATE2 output provides 4A peak sink current and 1A source current, supporting direct drive of up to three 12V-rated 5mΩ MOSFETs in parallel per channel (e.g., IPB052N15N3 G) without external buffers. Layout must minimize gate loop inductance to preserve 70ns timing integrity.

Does IR1168STRPBF require external components for basic operation?

No external components are required for core functionality: V_CC decoupling (100nF ceramic) and gate resistors (0–10Ω) are recommended but not mandatory. The IC integrates UVLO, gate clamp, blanking timer, and anti-bounce logic-enabling functional operation with only V_CC, V_Dx/V_Sx, and GATE connections.

Is IR1168STRPBF compatible with SiC or GaN secondary-side switches?

No-IR1168STRPBF is optimized for silicon N-channel MOSFETs with threshold voltages of 2–4V and gate charge ≤60nC. Its 10.7V gate clamp and 70ns timing are mismatched for GaN HEMTs (requiring <6V drive) or SiC MOSFETs (needing >15V turn-on). Use UCC24612 or MP6908 for wide-bandgap compatibility.

IR1168STRPBF Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: Not Verified

Applications:: Secondary-Side Controller, Synchronous Rectifier

Voltage - Input:: -

Voltage - Supply:: 8.6V ~ 18V

Current - Supply:: 48 mA

Operating Temperature:: -25°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

IR1168STRPBF FAQ

1.How can I place an order for IR1168STRPBF through Aetrix?

Please submit a Request for Quotation (RFQ) for IR1168STRPBF 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 IR1168STRPBF reliable?

The price and inventory of IR1168STRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR1168STRPBF is usually 5 days.

3.What payment methods are accepted for IR1168STRPBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR1168STRPBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IR1168STRPBF?

IR1168STRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IR1168STRPBF 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 IR1168STRPBF?

For technical support, including IR1168STRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR1168STRPBF requirements.

6.How does Aetrix verify that IR1168STRPBF is sourced from the original manufacturer or authorized distributors?

All IR1168STRPBF 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 IR1168STRPBF meets industry standards.

7.What is the process for return or replacement of IR1168STRPBF?

All IR1168STRPBF units undergo pre-shipment inspection (PSI). If there is an issue with IR1168STRPBF, 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 IR1168STRPBF part is unused and in its original packaging.

Return procedure for IR1168STRPBF:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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