Infineon Technologies CYPD7271-68LQXQT

Overview

CYPD7271-68LQXQT from Infineon is a dual-port USB-C Power Delivery and DC-DC controller IC with integrated 48-MHz Arm® Cortex®-M0 MCU, two buck-boost controllers (5.5–24 V input, 3.3–21.5 V output), 128-KB flash, and hardware-based VBUS OVP/OCP/UVP protection. It supports USB PD 3.2 with PPS, QC4+, AFC, and BC v1.2, targeting multi-port AC-DC adapters and cigarette lighter chargers.

For engineers reviewing the CYPD7271-68LQXQT datasheet, CYPD7271-68LQXQT pinout, CYPD7271-68LQXQT application, or CYPD7271-68LQXQT equivalent, this device delivers programmable dual-port power management with integrated analog peripherals (3×8-bit ADC, 4×TCPWM), 19 GPIOs, and spread-spectrum EMI reduction-critical for compact, high-density consumer charging designs.

Technical Context

The CYPD7271 implements two independent USB PD physical layers with BMC encoding/decoding, each paired with dedicated buck-boost control loops featuring cycle-by-cycle current sensing, programmable switching frequency (150–600 kHz), and selectable PSM/FCCM modes. Its integrated gate drivers support external VBUS NFETs on both provider paths.

System-level protection includes hardware-monitored VBUS OVP (40 V tolerant), OCP, UVP, VBUS-to-CC short detection, and thermal monitoring via internal sensor or external thermistors. The MCU subsystem runs at 48 MHz with 16-KB SRAM and executes custom load-sharing or temperature-aware firmware in user-flash space.

Key Specifications

Pinout & Package

Package: 68-pin QFN (8 mm × 8 mm), –40°C to +105°C industrial temperature range, exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-port USB-C PD controller applications.

Compared with CYPD7272-68LQXQT, this part offers identical silicon but distinct factory firmware; versus STUSB4500QTR, it provides full integration of MCU, dual buck-boost, and protection - reducing component count by ≥7 and enabling adaptive system-level power management.

Availability

CYPD7271-68LQXQT is available at Aetrix Electronics and suitable for multi-port AC-DC chargers, cigarette lighter adapters, and USB-C docking stations requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for CYPD7271-68LQXQT 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 ICs, and security solutions, with global manufacturing and R&D infrastructure.

This device belongs to the EZ-PD™ CCG7DC product line, engineered specifically for high-density, multi-port USB-C charging systems requiring integrated PD protocol handling, DC-DC conversion, and customizable firmware execution.

FAQ

What is the maximum continuous output current per port?

The CYPD7271 does not specify a fixed maximum current; instead, it supports programmable current limits up to 5 A per port via external shunt resistor and CSA gain configuration. Actual current capability depends on external FET selection, thermal design, and PCB layout - typical validated designs achieve 3.5 A continuous at 20 V with 40°C ambient.

Does it support USB PD 3.1 Extended Power Range (EPR)?

No. The CYPD7271 implements USB PD 3.2 specification up to 24 V / 5 A (120 W), but does not support EPR's 28–48 V profiles or associated communication extensions. Its buck-boost output range is capped at 21.5 V, and firmware lacks EPR message definitions or authentication handling.

Can the internal MCU be used for non-power functions like LED control or button interface?

Yes. With 128-KB flash (≥100 KB user-accessible), 16-KB SRAM, 19 GPIOs, and 4×TCPWM modules, the Cortex®-M0 supports custom firmware for LED dimming, mechanical button debouncing, status indication, and I²C/SPI peripheral interfacing - all concurrently with PD and DC-DC control tasks.

Is an external crystal required for USB timing compliance?

No. The device integrates a precision internal main oscillator (IMO) calibrated to ±0.2% over temperature and voltage, eliminating need for external crystal. USB PD BMC timing meets USB-IF requirements using IMO-derived clocks; optional external crystal may be used only if higher accuracy is required for non-USB functions.