Infineon Technologies CYPAS211A132LQXQXQLA1

Overview

CYPAS211A132LQXQXQLA1 from Infineon is an integrated secondary-side QR-ZVS PWM controller and USB Power Delivery 3.1 controller with EPR support up to 28 V VBUS, 32-bit Cortex-M0+ MCU (64 KB Flash, 8 KB SRAM), and synchronous rectifier driver supporting QR/CrCM/DCM/CCM modes up to 300 kHz - deployed in high-efficiency USB-C AC-DC flyback adapters for laptop and fast-charging applications.

For engineers reviewing the CYPAS211A132LQXQXQLA1 datasheet, CYPAS211A132LQXQXQLA1 pinout, CYPAS211A132LQXQXQLA1 application, or CYPAS211A132LQXQXQLA1 equivalent, key selection considerations include secondary-side ZVS timing accuracy, USB PD 3.1 + PPS + EPR protocol stack integration, SR gate drive capability (VDDD or 2×VDDD), LSCSA-based CC regulation, and thermal robustness across –40°C to +150°C junction range.

Technical Context

The device implements dual-loop regulation via two independent error amplifiers - one for CV (FB/EА_OUT) and one for CC (LSCSA/CC_COMP_GPIOx) - each requiring external compensation networks. Its PWM generator uses a programmable ramp (fixed + feed-forward current) compared against EA output to determine primary-side FET duty cycle, transferred via pulse-edge transformer.

ZVS detection combines zero-crossing (ZCD) and peak-detect (SR_CAP) sensing, configurable for resonance frequencies >4 MHz (capacitive coupling) or <4 MHz (floating SR_CAP). SR gate drive supports standard and logic-level NFETs, with internal doubler circuit enabling 2×VDDD drive voltage when SR_CPP/SR_CPN capacitor is connected.

Key Specifications

Pinout & Package

32-pin QFN package (5 mm × 5 mm, 0.5 mm pitch) with exposed thermal pad (EPAD); designed for high-power-density USB-C adapter PCB layouts requiring efficient heat dissipation from secondary-side location.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STUSB4760 and MPQ4282-AEC1, CYPAS211A132LQXQXQLA1 uniquely integrates USB PD 3.1 + EPR, a full Cortex-M0+ subsystem, and complete secondary-side QR-ZVS control - eliminating need for companion controllers and enabling single-chip, field-upgradable USB-C adapter designs.

Availability

CYPAS211A132LQXQXQLA1 is available at Aetrix Electronics and suitable for USB-C laptop adapters, multi-protocol fast chargers, and USB PD EPR power supplies requiring stable component supply, long-lifecycle assurance, and production-ready qualification.

Supply support for CYPAS211A132LQXQXQLA1 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 MCUs, and USB-C ecosystem solutions, with broad portfolio coverage from silicon to reference designs.

CYPAS211 belongs to the EZ-PD™ PAG2S-QZ product line, engineered specifically for high-efficiency, software-defined USB-C AC-DC adapters requiring integrated protocol stack, secondary-side control, and ZVS optimization.

FAQ

What USB PD specifications does CYPAS211A132LQXQXQLA1 support?

CYPAS211A132LQXQXQLA1 is fully compliant with USB PD 3.1, including Extended Power Range (EPR) up to 28 V, Programmable Power Supply (PPS), and legacy protocols such as QC5.0, QC4+, AFC, Apple Charging, and BC v1.2. Its integrated Cortex-M0+ executes the complete protocol stack, enabling firmware updates for future specification revisions without hardware change.

How does the ZVS control work across different conduction modes?

ZVS timing is implemented using combined zero-crossing detection (ZCD) and peak-detect sensing via SR_CAP for resonance frequencies above 4 MHz. For lower frequencies, ZCD alone suffices. The SR_SEN pin senses drain voltage through a resistive divider, and the internal logic dynamically adjusts gate drive timing to ensure turn-on occurs at or near zero voltage across QR, CrCM, DCM, and CCM modes.

Can CYPAS211A132LQXQXQLA1 drive both standard and logic-level MOSFETs?

Yes - the SR_GDRV output supports both standard-threshold and logic-level NFETs. Gate drive voltage is selectable between VDDD and 2×VDDD using the internal charge pump, configured by connecting a capacitor between SR_CPP and SR_CPN. This allows optimization of R_DS(on) and conduction loss across diverse MOSFET selections.

What protections are implemented on the CC and VBUS lines?

The device integrates hardware-level protection against VBUS-to-CC shorts, ±8 kV HBM ESD on CC1/CC2, and overvoltage protection on DP/DM lines. VBUS monitoring via VBUS_C enables configurable OVP/UVP thresholds, while dual internal discharge FETs provide controlled VBUS ramp-down during fault or disconnect events - all managed autonomously without MCU intervention.