Infineon Technologies CYPD6128-48LQXI

Overview

CYPD6128-48LQXI from Infineon is a single-port, USB Type-C and Power Delivery 3.0 port controller integrating an Arm® Cortex®-M0 CPU (48 MHz), 64-KB flash, 96-KB ROM, VBUS provider load switch (5 V/3 A), integrated Rp/Rd termination, and TRNG for authentication. It serves as the core control IC for USB-C ports in notebooks and desktops, managing CC logic, PD policy engine, VBUS switching, and SBU pass-through with 20-V short-circuit protection.

For engineers reviewing the CYPD6128-48LQXI datasheet, CYPD6128-48LQXI pinout, CYPD6128-48LQXI application, or CYPD6128-48LQXI equivalent, this device is selected for its integrated high-voltage CC/SBU protection, hardware-controlled VBUS OVP/UVP/OCP/SCP/OTP, slew-rate-controlled gate driver, and support for Fast Role Swap (FRS) in host-side USB-C implementations.

Technical Context

The CYPD6128-48LQXI implements a full USB PD 3.0 policy engine with BMC physical layer, dual CC line monitoring, and integrated VCONN FETs for EMCA cable power. Its MCU subsystem executes firmware-defined port policies while coordinating real-time responses via two TCPWM timers and four reconfigurable SCBs (I²C/SPI/UART).

It integrates a 5-V/3-A VBUS provider load switch with high-side current sensing across 5-mΩ shunt, configurable hardware protection thresholds, and automatic FRS response-turning off external consumer NFET and enabling internal provider path within defined timing windows per USB PD spec.

Key Specifications

Pinout & Package

Package: 48-pin QFN (6.0 mm × 6.0 mm × 0.6 mm, 0.4-mm pitch), thermally enhanced with exposed pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CYPD6127-48LQXI, this part offers identical silicon but distinct factory firmware; versus TPS65988DHAR, it provides lower system-level BOM count and integrated security primitives at the cost of single-port limitation.

Availability

CYPD6128-48LQXI is available at Aetrix Electronics and suitable for notebook design, desktop host integration, and USB-C docking station development requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for CYPD6128-48LQXI 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 connectivity solutions, with broad portfolio coverage in USB-C, GaN, and industrial control ICs.

CYPD6128 belongs to the EZ-PD™ CCG6SF product line, designed specifically for cost-optimized, single-port USB-C host applications in PCs and thin clients where integration, security, and compact QFN packaging are critical.

FAQ

What is the maximum VBUS voltage the CYPD6128-48LQXI can tolerate on CC and SBU pins?

The device supports up to 21.5 V on CC and SBU pins without damage, enabled by integrated high-voltage protection circuitry that isolates these lines from VBUS during accidental shorts. This rating aligns with USB Type-C specification requirements for robustness in real-world connector mating scenarios and ensures reliable operation even with misrouted cables or ESD events.

Does the CYPD6128-48LQXI require an external crystal oscillator?

No, the device includes an integrated IMO (Internal Main Oscillator) capable of driving the 48-MHz Cortex®-M0 core and USB PD PHY without external timing components. This eliminates BOM cost and board space associated with crystals or oscillators while maintaining sufficient accuracy for USB PD BMC timing and policy engine execution.

Can the CYPD6128-48LQXI support USB Audio Class (UAC) over the SBU lines?

Yes-it integrates dual SBU analog pass-through switches with 20-V short-circuit protection, enabling analog audio transmission over SBU1/SBU2 in USB-C implementations. The switches are controlled via firmware and support low-distortion signal routing compatible with standard USB Audio Class 2.0 analog accessory profiles.

How is dead-battery operation supported on the CYPD6128-48LQXI?

Dead-battery mode is enabled by the integrated high-voltage LDO (operational up to 21.5 V), which powers the device directly from VBUS when VSYS is absent. Combined with on-die dead-battery Rd termination, this allows the port to detect UFP attachment and initiate PD negotiation before system power rails are active-critical for instant-on notebook designs.