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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > AC DC Converters, Offline Switches

Infineon Technologies CYPAS111A1-24LQXQ

Name: CYPAS111A1-24LQXQ
Brand: Infineon Technologies
SKU: CYPAS111A1-24LQXQ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: CYPAS111A1-24LQXQ

Manufacturer:: Infineon Technologies

Category:: AC DC Converters, Offline Switches

Package:: 24-UFQFN Exposed Pad

Datasheet:: CYPAS111A1-24LQXQ.pdf

Description:: IC OFFLINE SWITCH FLYBACK 24QFN

Quantity:: RFQ Add To RFQ list

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Inventory:2,110

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Product details

Overview

CYPAS111A1-24LQXQ from Infineon Technologies is an integrated secondary-side synchronous flyback controller, synchronous rectifier (SR) controller, and USB PD 3.0 PPS-compliant charging port controller for AC-DC power adapters. It delivers CV/CC regulation (3.3–21.5 V / 1–3 A), supports QR/CrCM/DCM/burst modes, achieves <30 mW no-load consumption, and operates across 20–150 kHz switching frequency.

For engineers reviewing the CYPAS111A1-24LQXQ datasheet, CYPAS111A1-24LQXQ pinout, CYPAS111A1-24LQXQ application, or CYPAS111A1-24LQXQ equivalent, key selection criteria include secondary-side regulation architecture, SR gate drive capability with doubler support, USB PD 3.0 + PPS certification (TID:1475), and integrated LSCSA with programmable CC reference (0.4–2.1 V).

Technical Context

The device implements a dual-loop analog PWM control architecture with independent error amplifiers for constant voltage (FB/EV reference = 0.744 V) and constant current (LSCSA output → CC error amp, reference programmable 0.4–2.1 V). Regulation spans 3.3–21.5 V CV and 1–3 A CC per USB PD PPS requirements.

It integrates a valley-switching-capable SR controller with negative-sense detection (≥100 mV negative swing), ZCD (–16 mV threshold), peak detect, and feed-forward line sensing derived from SR_SEN. Gate drive supports internal VDDD or doubled VDDD via external capacitor on SR_CPP/SR_CPN for optimized R_DS(on).

Key Specifications

Parameter	Value and Actual Design Meaning
Switching frequency	20–150 kHz: Enables optimal efficiency trade-off between core loss and conduction loss in flyback topologies.
No-load power consumption	<30 mW: Meets CoC Tier 2 and DoE Level VI standby efficiency mandates without auxiliary winding.
CV output range	3.3–21.5 V: Covers full USB PD PPS profile (0–21 V) plus margin for line/load regulation.
CC output range	1–3 A: Matches USB PD PPS current specification and enables adaptive fast-charging protocols.
Operating temperature	–40°C to +105°C: Supports industrial-grade thermal reliability in enclosed power adapter environments.
USB PD compliance	USB PD 3.0 + PPS certified (TID:1475): Ensures interoperability with certified host devices and chargers.
Protection features	OVP/UVP/OCP/SCP/OTP: Configurable thresholds enable robust fault response without external circuitry.

Pinout & Package

Package: 24-pin QFN (4 mm × 4 mm, 0.5 mm pitch), EPAD grounded, rated for –40°C to +105°C operation.

Pin/Terminal	Circuit Role	Design Meaning
SR_GDRV	Synchronous rectifier NFET gate driver	Drives external SR FET gate at VDDD or 2×VDDD; supports valley switching and ZCD-triggered turn-on.
SR_SEN	SR drain node sense input	Accepts resistive divider from SR FET drain; enables negative-sense detect (≥100 mV), ZCD (–16 mV), and feed-forward line sensing.
FB	Constant voltage feedback input	Internal 200 kΩ/35 kΩ divider sets 0.744 V reference; regulates output voltage via external resistor network.
CSP / CSN	LSCSA positive/negative inputs	Measures low-side current sense voltage; enables precise 1–3 A CC regulation with programmable reference.
CC1 / CC2	USB Type-C configuration channel	Bi-directional BMC physical layer interface for USB PD communication and role negotiation.
VBUS_CTRL	Load switch NFET gate control	Directly drives external load switch FET to enable/discharge VBUS during fault or disconnect events.

Key Features

Feature	Design Value
Integrated SR controller with doubler	SR_GDRV supports 2×VDDD drive via SR_CPP/SR_CPN capacitor; reduces SR FET conduction loss across load range.
Programmable CC reference	0.4–2.1 V internal reference for LSCSA-based current regulation; enables precise 1–3 A PPS compliance.
Feed-forward line sensing	Extracts input line voltage from SR_SEN node to modulate PWM ramp; improves transient line response by >30% vs fixed ramp.
Multi-protocol charging support	Native firmware support for USB PD 2.0/3.0+PPS, QC 2.0–4.0, AFC, Apple, BC v1.2 - no external MCU required.
Voltage/current protection configurability	OVP/UVP/OCP/SCP/OTP thresholds set via one-time programmable (OTP) memory; eliminates external resistor networks.

Applications

USB PD 3.0 PPS Adapter

Quick Charge 4.0 Adapter

Use Scenario: 65 W compact wall charger delivering variable 5–20 V / 0–3.25 A output with <100 ms voltage step response.

IC Role / Device Role / Timing Role: Secondary-side controller performing real-time CV/CC regulation, SR timing, and BMC protocol handling.

Use Value: Eliminates optocoupler and TL431; achieves >94% peak efficiency and <30 mW no-load power.

Use Scenario: Multi-port travel adapter supporting simultaneous QC4+ and USB PD negotiation with dynamic power sharing.

IC Role / Device Role / Timing Role: Charging port controller managing legacy QC handshake while coordinating with primary-side controller via isolated link.

Use Value: Single-chip replaces discrete QC PHY + SR controller + secondary regulator; reduces BOM count by ≥7 components.

Universal GaN Adapter

Industrial USB-C Power Module

Use Scenario: 100 W GaN-based adapter with dual USB-C ports, supporting PPS and programmable voltage steps for laptop charging.

IC Role / Device Role / Timing Role: Synchronous rectifier controller synchronized to GaN primary FET valley switching; manages VBUS discharge and CC short protection.

Use Value: Doubler-enabled SR drive maintains low R_DS(on) at high V_GS; enables >95% efficiency at 100 W with 40°C case temp rise.

Use Scenario: DIN-rail mounted 48 V input / 20 V@3 A USB-C module powering industrial tablets and HMIs in factory automation.

IC Role / Device Role / Timing Role: Isolated secondary controller providing reinforced insulation barrier, ESD-protected CC lines, and OTP-configured OVP at 22.5 V.

Use Value: Integrated VBUS discharge FETs and CC short protection eliminate external TVS arrays; meets IEC 62368-1 creepage requirements.

Equivalent & Alternatives

The following parts are listed as comparable options for similar secondary-side USB PD controller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MPQ4282-AEC1 from Monolithic Power Systems	Automotive-grade AEC-Q100 qualified; lacks native USB PD PPS certification and BMC PHY; requires external PD controller.	Targeted at automotive infotainment USB ports, not consumer power adapters.	Select only if AEC-Q100 qualification is mandatory and PPS is not required.
STCH02 from STMicroelectronics	Standalone SR controller only; no integrated PD protocol engine, CV/CC regulation, or LSCSA; requires external MCU and PD PHY.	Used in cost-sensitive adapters where PD is handled externally via separate MCU + transceiver.	Choose when design already includes a PD-capable MCU and only SR optimization is needed.

Compared with MPQ4282-AEC1 and STCH02, CYPAS111A1-24LQXQ uniquely integrates certified USB PD 3.0+PPS protocol stack, dual-loop CV/CC regulation, and SR gate drive with doubler-enabling single-chip adapter designs without optocouplers, external PD controllers, or discrete current sense amplifiers.

Availability

CYPAS111A1-24LQXQ is available at Aetrix Electronics and suitable for USB PD PPS adapters, Quick Charge 4.0 power supplies, and industrial USB-C power modules requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for CYPAS111A1-24LQXQ 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 ICs, and industrial control solutions, with global manufacturing and quality certifications including ISO/TS 16949 and IATF 16949.

CYPAS111A1-24LQXQ belongs to the EZ-PD™ PAG1S product line, designed specifically for highly integrated, high-efficiency secondary-side control in USB-C power adapters supporting multiple fast-charging standards without external microcontrollers.

FAQ

Does CYPAS111A1-24LQXQ require an external microcontroller to implement USB PD communication?

No. The device integrates a fully certified USB PD 3.0 protocol engine with BMC PHY, supporting all mandatory and optional PD messaging (including PPS) without external MCU. Firmware is pre-programmed and field-upgradable via SWD interface using Infineon's EZ-PD™ Configuration Utility.

What is the function of the SR_CPP and SR_CPN pins?

SR_CPP and SR_CPN connect an external capacitor to enable the internal charge pump that doubles VDDD for SR_GDRV output. This provides ~6 V gate drive (when VDDD = 3.0 V), reducing R_DS(on) of external SR FETs and improving light-load efficiency in QR/CrCM operation.

Can CYPAS111A1-24LQXQ support both constant voltage and constant current regulation simultaneously?

Yes. It uses two independent analog control loops: one for CV (via FB/EV amplifier) and one for CC (via LSCSA and dedicated CC error amplifier). The device automatically transitions between modes during PPS operation, maintaining tight regulation across the full 3.3–21.5 V / 1–3 A matrix.

How is overvoltage protection implemented on the VBUS_C pin?

VBUS_C connects to an internal comparator with a user-configurable threshold stored in OTP memory. When VBUS_C exceeds the programmed level (e.g., 22.5 V), the device disables PWM_DRV_GPIO1, asserts VBUS_CTRL low to turn off the load switch, and discharges VBUS via integrated FETs-all within <1 µs.

CYPAS111A1-24LQXQ Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: 24-UFQFN Exposed Pad

Packaging:: Tray

Product Status:: Active

Output Isolation:: Isolated

Internal Switch(s):: No

Voltage - Breakdown:: -

Topology:: Flyback

Voltage - Start Up:: -

Voltage - Supply (Vcc/Vdd):: 2.7V ~ 5.5V

Duty Cycle:: -

Frequency - Switching:: 20kHz ~ 150kHz

Power (Watts):: -

Fault Protection:: -

Control Features:: -

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Supplier Device Package:: 24-QFN (4x4)

Mounting Type:: Surface Mount

CYPAS111A1-24LQXQ FAQ

1.How can I place an order for CYPAS111A1-24LQXQ through Aetrix?

Please submit a Request for Quotation (RFQ) for CYPAS111A1-24LQXQ 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 CYPAS111A1-24LQXQ reliable?

The price and inventory of CYPAS111A1-24LQXQ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYPAS111A1-24LQXQ is usually 5 days.

3.What payment methods are accepted for CYPAS111A1-24LQXQ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYPAS111A1-24LQXQ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CYPAS111A1-24LQXQ?

CYPAS111A1-24LQXQ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CYPAS111A1-24LQXQ 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 CYPAS111A1-24LQXQ?

For technical support, including CYPAS111A1-24LQXQ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYPAS111A1-24LQXQ requirements.

6.How does Aetrix verify that CYPAS111A1-24LQXQ is sourced from the original manufacturer or authorized distributors?

All CYPAS111A1-24LQXQ 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 CYPAS111A1-24LQXQ meets industry standards.

7.What is the process for return or replacement of CYPAS111A1-24LQXQ?

All CYPAS111A1-24LQXQ units undergo pre-shipment inspection (PSI). If there is an issue with CYPAS111A1-24LQXQ, 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 CYPAS111A1-24LQXQ part is unused and in its original packaging.

Return procedure for CYPAS111A1-24LQXQ:

1.Submit a request within 90 days.

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

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