SC441303MFU - NXP USB Charger Interface IC | DPAK
MPN: SC441303MFU ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1 | $1.00 |
| 10 | $0.9 | $9.00 |
| 100 | $0.75 | $75.00 |
| 500 | $0.62 | $310.00 |
| 1,000 | $0.5 | $500.00 |
SC441303MFU Overview
A USB charger interface IC is a specialized power management companion that sits between a DC input rail and a USB Type-A downstream port. Its role in the system hierarchy is: USB charger IC -> port controller -> power management IC -> interface IC -> integrated circuit. By identifying what is plugged in (legacy 500 mA, USB BC1.2, or higher-current adapters), the part enables the host system to draw the negotiated current without exceeding the port's safety limits. This is a common requirement for wall adapters, automotive chargers, and powered USB hubs.
Key features include USB Battery Charging Specification 1.2 (BC1.2) compliant detection, automatic current-limit advertisement, low quiescent current draw, and integrated thermal protection. The DPAK package provides a thermal pad that allows the IC to sink moderate power dissipation directly into the PCB copper pour without requiring a discrete heatsink. The device operates from a single supply rail suitable for adapter or 12 V bus systems.
From a technical perspective, the SC441303MFU implements the BC1.2 detection state machine, including the data-line contact-typing and primary/secondary detection phases. It uses an internal reference and a current-mirror scheme to set the load current advertised to the host, while a thermal foldback loop protects the IC from over-temperature events at high ambient temperatures or sustained maximum loads.
Typical applications include USB wall adapters and travel chargers, 12 V automotive USB power ports, powered USB hubs, and embedded industrial chargers. It is particularly useful where USB-A ports must reliably detect and respect the negotiated current of the connected device.
When designing with this part, ensure the DPAK thermal pad is soldered to a sufficiently large copper area (at least 1 square inch recommended) to keep junction temperature below the thermal shutdown threshold. Place input bypass capacitors close to the supply pin and follow the manufacturer's reference layout to minimize ground-loop noise on the detection pins.
Drop-in alternatives for SC441303MFU — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
SC441303MFUR2
✅ Drop-In📋 Reference alternative (not in catalog)
MC34671AEPR2
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
SC441303MFU Specifications
| Function | USB charger interface IC / port controller |
| Manufacturer | NXP Semiconductors (formerly Freescale) |
| Package | DPAK (TO-252) |
| Mounting Type | Surface Mount |
| USB Charging Standard | BC1.2 compliant (per manufacturer page) |
| Detected Charger Types | SDP / CDP / DCP / dedicated charger |
| Thermal Shutdown | Yes (internal) |
| RoHS Status | Compliant (per distributor listings) |
| Lead-Free | Yes |
SC441303MFU dpak (to-252) Pin Configuration Guide
Pin configuration for SC441303MFU (dpak (to-252) package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for SC441303MFU.
Refer to the datasheet for full pin configuration.
Typical Applications
SC441303MFU is suitable for 6 applications: USB Wall Adapter Charger, 12V Automotive USB Power Port, Powered USB Hub, Industrial Embedded Charger Module, Travel Charger with Multi-Port Output, USB-A Charging Receptacle on Monitor or Display.
USB Wall Adapter Charger
The SC441303MFU's BC1.2 charger-type detection makes it a strong fit for single-port USB-A wall adapters that must correctly identify legacy 500 mA, CDP, DCP, and dedicated-charger ports. Placed at the USB-A receptacle's VBUS line, the IC advertises the negotiated current and prevents downstream devices from drawing more than the adapter's rated output, improving safety and compliance with USB-IF Battery Charging 1.2. Compared with a discrete resistor-divider detection scheme, the integrated state machine reduces BOM count and firmware burden while delivering repeatable detection across charger variants.
Recommended
12V Automotive USB Power Port
Automotive USB-A power ports commonly derive 5 V from a 12 V bus and must reliably detect which charging scheme an attached phone requests. The SC441303MFU's DPAK package offers a thermal pad suitable for the elevated ambient temperatures inside a vehicle head unit or center console, while its built-in thermal shutdown protects the IC during sustained high-current charging. The IC's low quiescent draw keeps the parasitic load on the 12 V battery acceptable during key-off standby. Engineers can pair it with a downstream buck regulator to provide a tightly regulated 5 V rail.
Recommended
Powered USB Hub
Multi-port powered USB hubs require per-port charger-type identification so that each downstream device can negotiate the correct load current. The SC441303MFU's integrated BC1.2 detection state machine simplifies per-port firmware by handling the data-line contact-typing and primary/secondary detection phases in hardware. Its DPAK footprint makes it straightforward to place one IC per downstream port without crowding the hub PCB. Compared with software-only detection running on the hub controller, the dedicated hardware path offloads the timing-critical handshake and reduces the risk of misdetection across host platforms.
Recommended
Industrial Embedded Charger Module
Industrial chargers embedded in test equipment, kiosk terminals, and ruggedized handhelds must reliably charge connected tablets and handhelds without exceeding the port's current rating. The SC441303MFU's BC1.2 detection and built-in thermal foldback fit the -40C to +85C industrial temperature range common to factory-floor equipment. Placed at the USB-A output, the IC coordinates the negotiated current draw and trips into thermal shutdown if the ambient temperature forces junction temperatures above the safe limit. Its DPAK package allows direct PCB heat-sinking inside sealed enclosures where no airflow is available.
Recommended
Travel Charger with Multi-Port Output
Travel chargers with two or more USB-A outputs benefit from per-port BC1.2 detection so that each port independently advertises its available current to the attached device. The SC441303MFU's small DPAK footprint allows the design to fit one detection IC per port in a compact travel-charger housing without excessive PCB area. The integrated thermal protection is particularly useful when the user plugs a high-draw tablet into a port that is already heavily loaded, allowing the IC to throttle the advertisement before the internal temperature exceeds the safe operating area.
Recommended
USB-A Charging Receptacle on Monitor or Display
Computer monitors and large displays increasingly include USB-A charging ports as convenience features for connecting and charging phones or peripherals. The SC441303MFU fits these designs because it can detect the attached device's charging scheme and coordinate the load current without requiring a full USB hub controller. The DPAK package can be placed close to the USB-A connector on the display's I/O board, and the integrated thermal shutdown protects the IC in the enclosed, often passively cooled, display chassis.
Recommended
Recommended Products Summary
Engineering reference data for SC441303MFU — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | SC441303MFUR2 | MC34671AEPR2 |
|---|---|---|---|
| Package | DPAK (TO-252) | DPAK (TO-252) - same | DPAK (TO-252) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Function | USB charger interface IC (BC1.2) | USB charger interface IC (BC1.2) - same | Battery charger companion IC |
| RoHS Compliance | Compliant | Compliant | Compliant |
| Lead-Free | Yes | Yes | Yes |
| Thermal Shutdown | Yes | Yes | Yes |
Key Differentiators
- Integrated BC1.2 state machine in a DPAK footprint (vs Discrete resistor-divider BC1.2 detection)
- NXP (formerly Freescale) silicon with long-term supply (vs Generic third-party USB charger ICs)
- DPAK thermal pad enables direct PCB heat-sinking (vs Smaller SOT-23 charger-detection ICs)
Design Notes
Estimated: at a 1 W sustained dissipation in a DPAK with a typical theta_JA near 50 C/W, the junction temperature rise is about 50C above ambient. Solder the DPAK thermal pad to at least 1 square inch of 2 oz copper on the top and bottom layers connected by thermal vias to keep junction temperature below the thermal-shutdown threshold under worst-case load and ambient conditions.
Place the input bypass capacitor as close as possible to the IC's supply pin and route the D+/D- detection lines as short, matched traces to the USB-A receptacle. Avoid routing the detection traces near switching nodes or high-current paths; couple them to ground with a short, direct guard trace to prevent false charger-type misdetection.
Do not assume the SC441303MFU and SC441303 (Freescale legacy marking) are bit-exact across all datasheet revisions - verify against the latest NXP datasheet revision before reuse. Always respect the absolute-maximum VCC; if the upstream rail can exceed the rating during load-dump events, add a TVS clamp or upstream fuse.
Compliance Information
RoHS and lead-free status confirmed from distributor listings. REACH, halogen-free, and conflict-minerals declarations not explicitly published in indexed snippets and are listed as unknown pending manufacturer declaration.
