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onsemi FUSB3307D45A0AFMX
- Part No.:
- FUSB3307D45A0AFMX
- Manufacturer:
- onsemi
- Category:
- Controllers
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
FUSB3307D45A0AFMX.pdf
- Description:
- 45W USB TYPE-C PD SOURCE CONTROL
- Quantity:
- Payment:
- Shipping:
Inventory:4,348
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Product details
Overview
FUSB3307D45A0AFMX from onsemi is a USB Power Delivery 3.0 adaptive source charging controller in 14-lead SOIC package, implementing full PD 3.0 v2.0 and Type-C 2.0 compliance with Programmable Power Supply (PPS) support. It regulates output voltage from 3.3 V to 21 V and current up to 5 A via CV/CC control, using internal D/A converters and 10-bit ADC for real-time monitoring of VBUS, IOUT, and temperature. It directly controls N-channel MOSFET load switches and supports CC1/CC2 fault protection up to 26 V - deployed in wall chargers and AC-DC adapters.
For engineers reviewing the FUSB3307D45A0AFMX datasheet, pinout, applications, or equivalent options, key selection criteria include its 45 W power level, D+/D− BC1.2 mode configuration, −40°C to +85°C operating range, SOIC-14 package with 1.27 mm pitch, and integrated OVP/UVP/OCP/CC_OVP/VCONN_OCP/OTP protections.
Technical Context
The FUSB3307D45A0AFMX embeds a complete hardware-based USB PD 3.0 Device Policy Manager (DPM), Policy Engine, Protocol Stack, and BMC PHY - eliminating need for external microcontroller. Its CV/CC regulation uses dual error amplifiers: VFB senses output voltage via 1:10 resistor divider (reference voltage scales from 0.33 V at 3.3 V to 2.00 V at 20 V), while IFB receives amplified current-sense signal from IS+/IS− inputs with 40 V/V gain.
It implements adaptive protection logic including UVP/OVP blanking during VBUS transitions (200 ms UVP blanking, 7–221 ms OVP blanking depending on step size), and supports discharge via DISC pin with programmable enable threshold (330 mA) and sink current up to 250 mA. The GATE driver delivers 24.5 V high-level output at 21 V VCC, enabling direct drive of N-channel MOSFETs without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Power Level | 45 W - defines maximum sustained output capability under PD 3.0 PPS contracts |
| USB Compliance | PD 3.0 v2.0 & Type-C 2.0 - guarantees full protocol stack implementation including BMC encoding/decoding, CRC32, and PPS negotiation |
| Output Voltage Range | 3.3 V to 21 V - supports all USB PD PPS voltage steps with ±5% tolerance per spec |
| Max Output Current | 5 A - enforced by current-sense amplifier with 5 mΩ shunt and 40 V/V gain |
| Operating Temp | −40°C to +85°C - commercial-grade thermal rating validated for wall charger and adapter use cases |
| Package | SOIC-14 NB, 1.27 mm pitch - surface-mount package with exposed pad not present; compatible with standard reflow profiles |
| VCC Input Range | 3.3 V to 21 V - powers internal circuitry and enables direct sensing of regulated output rail |
Pinout & Package
Package: SOIC-14 NB (Case 751A-03), 1.27 mm lead pitch, no exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply input | Connects to regulated output rail (3.3–21 V); powers internal bias and feeds VDD regulator |
| VDD | Internal supply output | Regulated 5 V output for core logic; requires 1 µF bypass capacitor to GND |
| GATE | N-FET gate driver | Drives load switch MOSFET gate directly; 24.5 V swing at 21 V VCC enables low-Rds(on) NFETs |
| CATH | Opto-coupler feedback | Open-drain output tied to opto-coupler cathode (AC-DC) or DC-DC COMP/FB pin for closed-loop regulation |
| VFB | CV sense input | Non-inverting input of CV error amp; accepts 1:10 resistor divider; reference scales with VCC (0.33–2.00 V) |
| IFB | CC sense input | Non-inverting input of CC error amp; receives amplified shunt voltage (40× gain over IS+–IS−) |
| IS+, IS− | Current sense differential inputs | High-precision inputs for 5 mΩ shunt; supports 50 mA to 5 A sensing with <±3% error |
| CC1, CC2 | Type-C configuration channel | Bi-directional BMC I/O with 330 µA pull-up; detects attach/detach and negotiates PD contracts |
| DISC | VBUS discharge control | Open-drain I/O enabling external discharge resistor (e.g., 39 Ω) to meet USB-C discharge timing requirements |
| D+/PDIV1, D−/PDIV0 | BC1.2 / PDIV select | Configured as D+/D− for legacy battery charging detection; not used for PD signaling in this variant |
Key Features
| Feature | Design Value |
|---|---|
| Integrated PD 3.0 DPM + Policy Engine | Eliminates external MCU; handles full PD negotiation, state machines, and BMC physical layer without firmware |
| Adaptive OVP/UVP with blanking | Prevents false trips during dynamic VBUS transitions (e.g., PPS voltage stepping) via configurable blanking windows |
| NTC temperature sensing interface | Supports external thermistor on NTC pin for PCB or connector thermal monitoring with 60 µA current source |
| Small current-sense resistor (5 mΩ) | Reduces power loss and board space vs. typical 10–20 mΩ shunts; maintains <±3% current accuracy |
| Built-in VBUS discharge path | Enables compliant discharge timing (≤221 ms) via DISC pin and external resistor - no secondary controller needed |
Applications
| USB Wall Charger | AC-DC PD 3.0 Adapter |
|---|---|
Use Scenario: Compact 45 W USB-C wall charger for tablets and ultrabooks, delivering PPS-adjustable 5–20 V output. IC Role / Device Role / Timing Role: Primary PD source controller managing VBUS regulation, CC negotiation, and safety protections. Use Value: Enables single-chip PD 3.0 compliance with no firmware development; reduces BOM count by integrating policy engine, PHY, and CV/CC loops. | Use Scenario: Secondary-side-controlled offline AC-DC adapter with opto-coupler feedback, supporting 45 W PPS output. IC Role / Device Role / Timing Role: Controls CATH pin to modulate opto-coupler LED current, thereby regulating primary-side PWM controller via isolated feedback. Use Value: Replaces discrete op-amps and logic with integrated analog front-end and protection - improves transient response and reliability. |
| Automotive DC-DC Charger | Multi-Port PD Source Hub |
Use Scenario: In-vehicle 45 W USB-C charger using buck-boost topology, with NTC-based thermal derating near dashboard electronics. IC Role / Device Role / Timing Role: Directly drives gate of N-channel load switch and regulates COMP pin of DC-DC controller for precise CV/CC control. Use Value: Supports automotive ambient range (−40°C to +85°C); integrated OTP and CC_OVP prevent latch-up during hot-plug events. | Use Scenario: Dual-port desktop PD hub where FUSB3307D45A0AFMX manages one port's 45 W delivery while coordinating with companion ICs. IC Role / Device Role / Timing Role: Independent source controller per port; handles dedicated CC1/CC2 lines, independent VBUS discharge, and local fault isolation. Use Value: Enables true per-port power management without shared resources - avoids single-point failure across ports. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB PD source controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STUSB4500QTR | QFN-20 only; supports 60 W; lacks NTC interface and DISC-driven discharge; uses external VBUS monitor | Targeted at higher-power AC-DC adapters; requires external discharge circuit and thermal sensor | Select when >45 W output or QFN footprint preferred; verify external discharge design meets USB-C timing |
| MPQ4282GQ-A | Integrated DC-DC controller + PD PHY; 45 W; no standalone DPM - relies on host MCU for policy decisions | Suitable for MCU-based designs where firmware handles PD negotiation | Select when system already includes capable MCU and board space allows integrated buck controller |
Compared with STUSB4500QTR and MPQ4282GQ-A, the FUSB3307D45A0AFMX uniquely combines full hardware PD 3.0 DPM, NTC thermal sensing, and DISC-controlled VBUS discharge in SOIC-14 - reducing system complexity for cost-sensitive, MCU-free 45 W source designs.
Availability
FUSB3307D45A0AFMX is available at Aetrix Electronics and suitable for USB wall chargers, AC-DC PD 3.0 adapters, and automotive DC-DC chargers requiring stable component supply, long-term lifecycle support, and production-ready qualification.
Supply support for FUSB3307D45A0AFMX 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
onsemi is a global semiconductor leader focused on energy-efficient innovation, delivering silicon solutions for automotive, industrial, cloud, and IoT applications.
The FUSB3307D45A0AFMX belongs to onsemi's USB Power Delivery controller product line, engineered specifically for fully autonomous, firmware-free PD 3.0 source implementations in compact, cost-sensitive AC-DC and DC-DC power supplies.
FAQ
What USB Power Delivery version does FUSB3307D45A0AFMX support?
FUSB3307D45A0AFMX supports full USB Power Delivery 3.0 v2.0 compliance, including Programmable Power Supply (PPS) with voltage steps from 3.3 V to 21 V and current up to 5 A. It implements the complete Device Policy Manager, Policy Engine, Protocol Stack, and BMC PHY in hardware - no external processor required. The FUSB3307D45A0AFMX also complies with USB Type-C 2.0 specifications for source detection, attach/detach, and CC line management.
Does FUSB3307D45A0AFMX require an external microcontroller?
No, FUSB3307D45A0AFMX does not require an external microcontroller. It integrates a complete hardware-based USB PD 3.0 Device Policy Manager (DPM), Policy Engine, Protocol Stack, and BMC PHY. All PD negotiation, state machine execution, and BMC encoding/decoding are handled autonomously. The FUSB3307D45A0AFMX is designed for MCU-free implementations - ideal for cost-sensitive, high-reliability USB-C power sources.
What is the function of the DISC pin on FUSB3307D45A0AFMX?
The DISC pin on FUSB3307D45A0AFMX is an open-drain output that enables controlled VBUS discharge via an external resistor (e.g., 39 Ω). It activates automatically when VBUS must be discharged - such as during detach or fault recovery - meeting USB-C specification timing (≤221 ms). The FUSB3307D45A0AFMX monitors output current and disables internal discharge if load current exceeds 330 mA, optimizing efficiency. This eliminates need for external discharge controllers.
Can FUSB3307D45A0AFMX control both AC-DC and DC-DC topologies?
Yes, FUSB3307D45A0AFMX supports both AC-DC and DC-DC topologies. In AC-DC designs, it drives the CATH pin to modulate opto-coupler current and regulate the primary-side PWM controller. In DC-DC applications, it connects CATH to the COMP or FB pin of buck/buck-boost controllers (e.g., NCV81599) for direct loop control. The FUSB3307D45A0AFMX's flexible CV/CC architecture and gate driver make it topology-agnostic for 45 W source implementations.
What protection features are integrated into FUSB3307D45A0AFMX?
FUSB3307D45A0AFMX integrates comprehensive protections: Under Voltage Protection (UVP), Over Voltage Protection (OVP), Over Current Protection (OCP), CC1/CC2 Over Voltage Protection (CC_OVP), VCONN Over Current Protection (VCONN_OCP), and internal/external Over Temperature Protection (I_OTP/E_OTP). It also features adaptive blanking during VBUS transients and automatic VBUS discharge via DISC pin. These are all hardware-implemented with configurable debounce and blanking times - no firmware intervention required.
FUSB3307D45A0AFMX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Programmable:
- Not Verified
- Protocol:
- USB
- Function:
- Adapter
- Interface:
- USB
- Standards:
- USB 3.0
- Voltage - Supply:
- 4.75V ~ 5.5V
- Current - Supply:
- 10mA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Supplier Device Package:
- 14-SOIC
- Grade:
- -
- Qualification:
- -
FUSB3307D45A0AFMX FAQ
1.How can I place an order for FUSB3307D45A0AFMX through Aetrix?
Please submit a Request for Quotation (RFQ) for FUSB3307D45A0AFMX 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 FUSB3307D45A0AFMX reliable?
The price and inventory of FUSB3307D45A0AFMX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FUSB3307D45A0AFMX is usually 5 days.
3.What payment methods are accepted for FUSB3307D45A0AFMX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FUSB3307D45A0AFMX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FUSB3307D45A0AFMX?
FUSB3307D45A0AFMX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FUSB3307D45A0AFMX 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 FUSB3307D45A0AFMX?
For technical support, including FUSB3307D45A0AFMX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FUSB3307D45A0AFMX requirements.
6.How does Aetrix verify that FUSB3307D45A0AFMX is sourced from the original manufacturer or authorized distributors?
All FUSB3307D45A0AFMX 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 FUSB3307D45A0AFMX meets industry standards.
7.What is the process for return or replacement of FUSB3307D45A0AFMX?
All FUSB3307D45A0AFMX units undergo pre-shipment inspection (PSI). If there is an issue with FUSB3307D45A0AFMX, 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 FUSB3307D45A0AFMX part is unused and in its original packaging.
Return procedure for FUSB3307D45A0AFMX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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