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Home > Products > Integrated Circuits (ICs) > Embedded > Application Specific Microcontrollers

Infineon Technologies CYPD3173-24LQXQT

Name: CYPD3173-24LQXQT
Brand: Infineon Technologies
SKU: CYPD3173-24LQXQT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: CYPD3173-24LQXQT

Manufacturer:: Infineon Technologies

Category:: Application Specific Microcontrollers

Package:: 24-UFQFN Exposed Pad

Datasheet:: CYPD3173-24LQXQT.pdf

Description:: CCG3PA-NFET

Quantity:: RFQ Add To RFQ list

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Product details

Overview

CYPD3173-24LQXQT from Infineon Technologies (formerly Cypress) is a USB Type-C port controller with integrated NFET gate driver, compliant with USB PD 3.0 PPS, QC4.0, and BC1.2 standards. It implements dual error amplifiers for independent constant voltage (3.3–21 V) and constant current (1–3 A) regulation, integrates full BMC transceiver with on-die Rp termination, and drives external load-switch NFETs via VBUS_CTRL pin in 24-pin QFN package for power adapter applications.

For engineers reviewing the CYPD3173-24LQXQT datasheet, CYPD3173-24LQXQT pinout, CYPD3173-24LQXQT application, or CYPD3173-24LQXQT equivalent, key selection criteria include its opto-coupled/direct secondary-side feedback support, integrated LSCSA (5–150× gain), CC/CV mode independence, VBUS_IN range (3.3–21.5 V), and 6 GPIOs with multiplexed USB D+/D− functionality.

Technical Context

The device embeds a Cortex-M0 MCU subsystem (64 KB Flash, 4 KB SRAM) executing USB-PD protocol stack and charging logic, coupled with analog regulation blocks for real-time CV/CC control. Its BMC PHY handles half-duplex CC1/CC2 communication with built-in collision avoidance and programmable Rp switching per USB-IF specification.

Analog subsystem includes two error amplifiers-one for CV (FB/EА_OUT reference = 0.744 V) and one for CC (CC_COMP_GPIO2/LSCSA)-with internal IDACs enabling precise output adjustment. The high-voltage regulator accepts VBUS_IN (3.3–21.5 V) and delivers regulated VDDD (5 V or VBUS_IN − 300 mV) and VCCD (1.8 V), powering core and analog domains independently.

Key Specifications

Parameter	Value and Actual Design Meaning
USB PD Support	PD 2.0/3.0 with PPS, enabling programmable 3.3–21 V / 1–3 A output in power adapters
VBUS_IN Range	3.3 V to 21.5 V input, supporting wide-input flyback topologies without external HV LDO
Constant Voltage Range	3.3 V to 21 V regulated output, set via FB node current sourcing/sinking using internal IDACs
Constant Current Range	1 A to 3 A, measured by LSCSA (CSP/CSN) with selectable gain (5–150) and 5 mΩ sense resistor
Gate Driver Output	VBUS_CTRL drives external NFET gate to VBUS_IN + 8 V (clamped), enabling low-Rds(on) switch control
Operating Temperature	−40 °C to +105 °C industrial grade, validated for enclosed power adapter thermal environments
Package	24-pin QFN (4 mm × 4 mm, 0.5 mm pitch), EPAD grounded for thermal dissipation in high-power adapters

Pinout & Package

Package: 24-pin QFN (4 mm × 4 mm, 0.5 mm pitch) with exposed thermal pad (EPAD) connected to VSS for PCB-level heat sinking in compact power adapters.

Pin/Terminal	Circuit Role	Design Meaning
VBUS_CTRL (Pin 19)	NFET gate driver output	Drives external load-switch NFET gate to VBUS_IN + 8 V (clamped); enables fast turn-on/turn-off of high-current path
FB (Pin 9) & EA_OUT (Pin 8)	CV error amplifier interface	FB is negative input (0.744 V internal ref); EA_OUT sources/sinks current proportional to CV error for opto or direct feedback
CSP/CSN (Pins 11/10)	Low-side current sense inputs	Differential inputs to LSCSA; supports 5–150× gain for accurate 1–3 A CC regulation with 5 mΩ Rsense
CC1/CC2 (Pins 14/13)	USB PD configuration channel	BMC transceiver I/O with integrated Rp termination switches; requires external 390 pF capacitor per line
DP_GPIO5/DM_GPIO4 (Pins 17/16)	USB D+/D− or GPIO	Support legacy BC1.2/QC/AFC/Apple charging detection; configurable as general-purpose I/O when not used for USB

Key Features

Feature	Design Value
Dual independent error amplifiers	Separate CV and CC regulation paths enable simultaneous tight control of output voltage and current per USB-PD PPS spec
Integrated LSCSA with offset cancellation	Enables ±1% current accuracy over temperature and lifetime without calibration, critical for PPS compliance
Programmable fault protection	OVP/UVP/OCP/SCP/OTP configurable via firmware, eliminating discrete protection ICs and reducing BOM count
On-die USB PD transceiver + Rp	Eliminates 4 external resistors and associated routing; ensures USB-IF compliance without layout sensitivity
6 GPIOs with USB D+/D− multiplexing	Reduces need for external level shifters or dedicated USB PHY; supports charge detection and system control in same footprint

Applications

USB PD 3.0 PPS Power Adapter

Quick Charge 4.0 Wall Charger

Use Scenario: Compact 65 W laptop adapter delivering variable 5–20 V / 0.5–3.25 A output with dynamic step adjustment.

IC Role / Device Role / Timing Role: Primary secondary-side USB PD controller managing CC/CV loop, BMC communication, and NFET gate timing.

Use Value: Enables single-chip PPS implementation with <1% CV/CC regulation error and sub-100 µs fault response time.

Use Scenario: Dual-port QC4.0 wall charger supporting simultaneous fast charging of smartphone and earbuds.

IC Role / Device Role / Timing Role: Legacy charging protocol manager detecting BC1.2/QC4.0 handshake on DP/DM while coordinating VBUS sequencing.

Use Value: Eliminates separate QC IC and reduces bill-of-materials by integrating D+/D− termination, sensing, and control logic.

Universal Travel Adapter

USB-C GaN Power Brick

Use Scenario: Multi-standard travel adapter supporting USB PD, QC, AFC, and Apple 2.4 A charging across global AC inputs.

IC Role / Device Role / Timing Role: Protocol arbitration engine selecting optimal charging standard based on sink capability negotiation.

Use Value: Reduces firmware complexity via integrated protocol stack and eliminates external USB PD policy engine IC.

Use Scenario: 100 W GaN-based power brick requiring fast VBUS discharge, precise current limiting, and thermal derating.

IC Role / Device Role / Timing Role: System supervisor monitoring VBUS_C, CSP/CSN, temperature sensor, and controlling VBUS_CTRL timing during soft-start/fault recovery.

Use Value: Provides coordinated 10 ms VBUS discharge via internal FETs and real-time OCP triggering at 3.2 A threshold.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
CYPD3171-24LQXQ	Lacks integrated LSCSA and CC_COMP_GPIO2; no hardware constant current regulation path	Suitable only for CV-only adapters (e.g., fixed 5 V/9 V/15 V/20 V), not PPS or QC4.0 CC mode	Select when BOM cost priority outweighs PPS support and CC regulation accuracy requirements
STUSB4500QTR	Standalone USB PD controller without MCU, gate driver, or analog regulation blocks; requires external microcontroller and feedback circuitry	Used in designs where primary-side controller handles all regulation; adds latency and component count	Select when leveraging existing MCU infrastructure and needing minimal USB PD PHY functionality only

Compared with CYPD3171-24LQXQ and STUSB4500QTR, CYPD3173-24LQXQT uniquely integrates dual-loop analog regulation, gate driver, and MCU in one die-reducing adapter size, improving PPS response time, and eliminating external current-sense amplifiers and opto-coupler biasing components.

Availability

CYPD3173-24LQXQT is available at Aetrix Electronics and suitable for USB PD 3.0 PPS power adapters, Quick Charge 4.0 wall chargers, and universal travel adapters requiring stable component supply, long-lifecycle support, and qualified industrial-temperature operation.

Supply support for CYPD3173-24LQXQT 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 global semiconductor leader specializing in power management, automotive, and industrial control solutions, with deep expertise in USB PD and high-efficiency power conversion.

CYPD3173-24LQXQT belongs to the EZ-PD™ CCG3PA family, designed specifically for secondary-side digital control in compact, high-density USB-C power adapters supporting USB PD 3.0 PPS and multi-protocol charging.

FAQ

What feedback architectures does CYPD3173-24LQXQT support?

CYPD3173-24LQXQT supports both opto-coupler-based and direct feedback configurations. In opto mode, EA_OUT drives the opto-LED anode while FB connects to the cathode side; in direct mode, FB is biased via external resistor divider and IDACs adjust current to regulate VBUS. Both modes use the same internal CV/CC error amplifiers and are selected via firmware configuration.

How is overcurrent protection implemented without external sense resistors?

Overcurrent protection uses the integrated low-side current sense amplifier (LSCSA) with CSP and CSN pins. With a 5 mΩ sense resistor, LSCSA's programmable gain (5–150×) delivers a 10–300 mV differential signal to the CC error amplifier. Fault detection triggers within 10 µs when current exceeds the programmed threshold, asserting SCP and disabling VBUS_CTRL.

Can CYPD3173-24LQXQT operate without an external microcontroller?

Yes. The onboard Cortex-M0 (64 KB Flash, 4 KB SRAM) executes the complete USB PD 3.0 stack, charging protocol handlers (QC4.0, AFC, Apple), and regulation control loops. No external MCU is required-only firmware programming via SWD or CC interface during development or field updates.

What is the maximum VBUS_IN voltage the internal HV regulator can withstand?

The internal HV regulator accepts up to 21.5 V on VBUS_IN. At this voltage, it delivers a stable 5 V on VDDD with ≤50 mA total output capability-including internal chip consumption. Operation above 21.5 V risks permanent damage to the regulator and is outside absolute maximum ratings per datasheet Rev. *A.

CYPD3173-24LQXQT Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: EZ-PD™

Package/Case:: 24-UFQFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: Not Verified

Applications:: Power Adaptor

Core Processor:: ARM® Cortex®-M0

Program Memory Type:: FLASH (64kB)

Controller Series:: CYPD3x

RAM Size:: -

Interface:: -

Number of I/O:: -

Voltage - Supply:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

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

CYPD3173-24LQXQT FAQ

1.How can I place an order for CYPD3173-24LQXQT through Aetrix?

Please submit a Request for Quotation (RFQ) for CYPD3173-24LQXQT 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 CYPD3173-24LQXQT reliable?

The price and inventory of CYPD3173-24LQXQT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYPD3173-24LQXQT is usually 5 days.

3.What payment methods are accepted for CYPD3173-24LQXQT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYPD3173-24LQXQT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CYPD3173-24LQXQT?

CYPD3173-24LQXQT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CYPD3173-24LQXQT 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 CYPD3173-24LQXQT?

For technical support, including CYPD3173-24LQXQT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYPD3173-24LQXQT requirements.

6.How does Aetrix verify that CYPD3173-24LQXQT is sourced from the original manufacturer or authorized distributors?

All CYPD3173-24LQXQT 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 CYPD3173-24LQXQT meets industry standards.

7.What is the process for return or replacement of CYPD3173-24LQXQT?

All CYPD3173-24LQXQT units undergo pre-shipment inspection (PSI). If there is an issue with CYPD3173-24LQXQT, 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 CYPD3173-24LQXQT part is unused and in its original packaging.

Return procedure for CYPD3173-24LQXQT:

1.Submit a request within 90 days.

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

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