Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Infineon Technologies IR11688STRPBF

Name: IR11688STRPBF
Brand: Infineon Technologies
SKU: IR11688STRPBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: IR11688STRPBF

Manufacturer:: Infineon Technologies

Category:: Power Supply Controllers, Monitors

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

Datasheet:: IR11688STRPBF.pdf

Description:: DUAL SYNCHRONOUS RECTIFICATION C

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:3,621

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

IR11688STRPBF from Infineon Technologies is a dual-channel secondary-side synchronous rectification controller IC for LLC and resonant half-bridge SMPS topologies, featuring 200V drain-sense capability, 400kHz max switching frequency, 50ns turn-off propagation delay, 4A sink/1A source gate drive, and cycle-by-cycle minimum on-time (MOT) protection - deployed in high-efficiency AC-DC adapters and telecom power supplies.

For engineers reviewing the IR11688STRPBF datasheet, IR11688STRPBF pinout, IR11688STRPBF application, or IR11688STRPBF equivalent, key selection criteria include drain-voltage sensing range (−3V to 200V), programmable MOT via external resistor (20–150kΩ), ultra-low quiescent current (320–500µA), UVLO thresholds (4.15–4.75V), and SOIC-8 package compatibility with high-noise resonant converter environments.

Technical Context

The IR11688STRPBF implements dual independent gate control channels with separate VD1/VD2 sense inputs and GATE1/GATE2 outputs, each using fast comparator-based zero-current detection with 150ns blanking and double-pulse suppression to prevent false triggering in variable-frequency LLC operation. Its linear turn-off phase compensates for parasitic inductance-induced premature switch-off.

It integrates cycle-by-cycle MOT protection that disables gate drives under light/no-load conditions to block reverse conduction, while its micropower start-up (40–80µA) and auto low-power standby mode support Energy Star-compliant <50mW standby consumption. The VCC supply range (4.75–18V) enables direct derivation from ≥5V output rails without auxiliary winding.

Key Specifications

Parameter	Value and Actual Design Meaning
V_D Sense Range	−3V to 200V pulse; enables direct high-side MOSFET drain monitoring without level-shifting in 12V–48V output LLC converters
Max Switching Frequency	400kHz; supports high-density resonant designs with reduced magnetics size and improved transient response
Gate Drive Current	+1A source / −4A sink; ensures rapid MOSFET turn-on/turn-off to minimize conduction and switching losses
Turn-off Propagation Delay	42–60ns; critical for precise zero-current switching alignment in sub-100ns timing windows
Quiescent Current	320–500µA at no switching; enables <50mW system standby power when paired with 5V output rail
MOT Programmability	375–1250ns via 20–150kΩ RMOT resistor; allows tuning for 100–400kHz operation across load and line variations
V_CC Operating Range	4.75–18V; permits direct connection to regulated 5V, 12V, or 15V output bus-eliminating auxiliary bias supply

Pinout & Package

IR11688STRPBF is housed in an industry-standard 8-pin SOIC (SOIC-8N) package with exposed pad for thermal enhancement, rated for 128°C/W junction-to-ambient thermal resistance and 970mW max power dissipation at 25°C ambient.

Pin/Terminal	Circuit Role	Design Meaning
1 (GATE1)	Channel 1 gate driver output	Drives N-channel SR MOSFET source-connected to output rail; +1A/−4A capable
2 (GATE2)	Channel 2 gate driver output	Independent drive for second SR MOSFET; synchronized but not interlocked with GATE1
3 (V_CC)	Positive supply input	Accepts 4.75–18V; powers internal bias, logic, and drivers; UVLO active below 4.15V
4 (MOT)	Minimum On-Time programming input	Analog pin setting T_ONmin via external resistor (20–150kΩ); enables frequency scalability
5 (V_D1)	Channel 1 drain voltage sense	High-speed comparator input referenced to VS; monitors MOSFET drain for ZCS detection
6 (GND)	Power and signal ground reference	Common return for V_CC, gate drivers, and sense circuitry; requires low-inductance layout
7 (VS)	Source sense reference	Low-side reference point for V_D1/V_D2 comparators; connects to SR MOSFET source node
8 (V_D2)	Channel 2 drain voltage sense	Independent high-voltage sense input; supports asymmetric dual-MOSFET or paralleled configurations

Key Features

Feature	Design Value
Direct 200V drain sensing	Eliminates external level-shifters and high-voltage dividers, reducing BOM count and layout complexity in 48V-output telecom PSUs
Linear turn-off phase compensation	Adjusts gate turn-off timing dynamically to counteract parasitic inductance-induced early turn-off in high-dI/dt LLC secondaries
Cycle-by-cycle MOT protection	Disables gate drive per cycle when MOT violation occurs-prevents reverse conduction and shoot-through during light-load burst mode
50ns turn-off propagation delay	Enables accurate gate timing alignment within tight 100ns ZCS windows typical of 300–400kHz resonant converters
Auto low-power standby mode	Reduces ICC to ≤500µA when V_D activity ceases, supporting Energy Star Tier 2 and DoE Level VI standby compliance

Applications

Desktop & Server SMPS

AC-DC Adapters

Use Scenario: 200–1000W multi-rail ATX/SSI power supplies with LLC resonant topology and 12V/5V/3.3V outputs.

IC Role / Device Role / Timing Role: Dual-channel synchronous rectifier controller managing two parallel N-MOSFETs per rail to replace Schottky diodes on secondary side.

Use Value: Achieves >95% full-load efficiency and <40mW no-load consumption by eliminating forward voltage drop and enabling precise ZCS switching.

Use Scenario: Compact 65W–120W USB-C PD adapters with GaN primary-side and high-frequency LLC stage.

IC Role / Device Role / Timing Role: Secondary-side gate driver coordinating two N-MOSFETs in center-tapped or full-wave synchronous rectification configuration.

Use Value: Enables 30mm × 30mm form factor with 94% peak efficiency by reducing SR conduction loss and supporting 350kHz+ operation.

Telecom SMPS

LCD & PDP TV Power

Use Scenario: 48V-input, 12V/54V-output telecom rectifiers operating at 250–350kHz with strict -40°C to +85°C ambient requirement.

IC Role / Device Role / Timing Role: High-noise-immunity SR controller driving paralleled MOSFETs per channel with robust blanking and double-pulse suppression.

Use Value: Maintains stable ZCS detection under EMI-rich base station environments, preventing false turn-on and improving MTBF.

Use Scenario: 200–400W LCD backlight and main logic power supplies using asymmetric LLC with 24V/12V outputs.

IC Role / Device Role / Timing Role: Dual-channel SR controller supporting independent MOT tuning per channel to accommodate different output voltages and load dynamics.

Use Value: Delivers 2.5% absolute efficiency gain over diode rectification at 50% load, directly reducing heatsink size and acoustic noise.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel synchronous rectification controller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
UCC24612DR	Single-channel, 100V V_D rating, fixed 300ns MOT, no cycle-by-cycle MOT protection	Suitable only for ≤100V secondary designs; lacks light-load reverse-conduction blocking	Select when cost sensitivity outweighs 200V headroom and MOT adaptability needs
MP6908GJ-Z	Dual-channel, 200V V_D, 400kHz max, but 120ns t_Doff vs. 50ns and no linear turn-off compensation	Less precise ZCS alignment in high-dI/dt LLC; higher EMI susceptibility in noisy telecom environments	Prefer where layout simplicity and footprint match outweigh timing-critical performance

Compared with UCC24612DR and MP6908GJ-Z, IR11688STRPBF uniquely combines 200V drain sensing, 50ns turn-off delay, cycle-by-cycle MOT protection, and linear turn-off compensation-making it the only option qualified for high-reliability, high-frequency, high-output-voltage LLC systems requiring <100ns timing fidelity and reverse-conduction immunity.

Availability

IR11688STRPBF is available at Aetrix Electronics and suitable for desktop SMPS, telecom rectifiers, and AC-DC adapters requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for IR11688STRPBF 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 manufacturer specializing in power management, automotive, and industrial control ICs, with leadership in high-voltage analog and mixed-signal power solutions.

The IR11688STRPBF belongs to Infineon's SmartRectifier™ family, engineered specifically for high-efficiency secondary-side synchronous rectification in resonant LLC and half-bridge converters targeting 80 PLUS Titanium and Energy Star compliance.

FAQ

What is the purpose of the MOT pin (Pin 4) on the IR11688STRPBF?

The MOT pin sets the minimum on-time for each channel via an external resistor (20–150kΩ). It determines the shortest gate-on duration allowed before forced turn-off, preventing MOSFET conduction during non-conductive intervals. This parameter is critical for avoiding reverse current flow at light loads and is actively monitored cycle-by-cycle to disable drives when violated.

Can IR11688STRPBF drive paralleled MOSFETs per channel?

Yes - each gate output (GATE1/GATE2) delivers +1A source and −4A sink current, sufficient to drive multiple N-channel MOSFETs in parallel without external buffers. Layout must maintain matched gate loop inductance across paralleled devices to ensure simultaneous switching and current sharing.

How does the IR11688STRPBF achieve noise immunity in high-dI/dt LLC environments?

It uses a 150ns hardware blanking window after each turn-on event, double-pulse suppression logic, and comparator hysteresis (230mV) on V_D inputs. These features reject fast transients and ringing induced by transformer leakage inductance and PCB parasitics, ensuring reliable zero-current detection without software intervention.

Is V_CC required to be derived from an auxiliary winding?

No - the wide 4.75–18V V_CC range allows direct connection to the main output rail (e.g., 5V, 12V, or 15V), eliminating the need for an auxiliary bias winding or dedicated LDO. This simplifies transformer design and improves light-load efficiency by removing auxiliary circuit losses.

IR11688STRPBF 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

Applications:: Secondary-Side Controller, Synchronous Rectifier

Voltage - Input:: -

Voltage - Supply:: 4.75V ~ 18V

Current - Supply:: 13 mA

Operating Temperature:: -40°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

IR11688STRPBF FAQ

1.How can I place an order for IR11688STRPBF through Aetrix?

Please submit a Request for Quotation (RFQ) for IR11688STRPBF 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 IR11688STRPBF reliable?

The price and inventory of IR11688STRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IR11688STRPBF is usually 5 days.

3.What payment methods are accepted for IR11688STRPBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IR11688STRPBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IR11688STRPBF?

IR11688STRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IR11688STRPBF 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 IR11688STRPBF?

For technical support, including IR11688STRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IR11688STRPBF requirements.

6.How does Aetrix verify that IR11688STRPBF is sourced from the original manufacturer or authorized distributors?

All IR11688STRPBF 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 IR11688STRPBF meets industry standards.

7.What is the process for return or replacement of IR11688STRPBF?

All IR11688STRPBF units undergo pre-shipment inspection (PSI). If there is an issue with IR11688STRPBF, 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 IR11688STRPBF part is unused and in its original packaging.

Return procedure for IR11688STRPBF:

1.Submit a request within 90 days.

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

Tech Hub

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…

2026-08-11 LDO Regulator: Dropout Voltage, Noise, PSRR and Power Dissipation

LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…

2026-08-06 Conditional Access Module: CAM, CI/CI+ and DVB Security

Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…

2026-08-03 Electronic Component Obsolescence: EOL Risks, Replacement Options and Last-Time Buy Strategy

Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.

2026-07-29 18650 Battery: Voltage, Capacity, Charging and Pack Design

18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…

2026-07-27 Hall Effect Sensor: Working Principle, Types, Circuits and Applications

Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…

2026-07-20 Product Change Notification (PCN) in Electronic Components: Meaning and Supply Chain Response

Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…

2026-07-19 Blend Door Actuator: Symptoms, Location, Reset and Replacement Guide

A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…

2026-07-17 Raspberry Pi Alternatives: Chip-Level Comparison, Compatibility and Replacement Guide

Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…