STUSB4531BJR - Standalone USB PD Sink Controller | ST
MPN: STUSB4531BJR ✓ فعالSTUSB4531BJR نمای کلی
A USB PD sink controller is the device-side counterpart in a USB Type-C power negotiation: it communicates with a source (charger, dock, or power adapter) over the CC line using the USB PD protocol to agree on a voltage and current contract. Within the power-management hierarchy, it sits between the USB-C receptacle and the system power path, upstream of DC-DC converters and battery chargers, and is a key building block of modern USB-C power interface ICs.
Key features include fully standalone autorun operation with a default PDO configuration stored in internal non-volatile memory, proprietary negotiation algorithms that secure a power contract without a host MCU, dead battery operation powered directly from the VBUS receptacle pins, and a wide 23 V VBUS tolerance that removes the need for external front-end protection in many designs.
The STUSB4531 implements its negotiation state machines in dedicated hardware, so it continues operating even when the application processor is asleep or unpowered. The hybrid mode allows an application MCU to monitor or adjust the negotiation, giving designers both autonomy and flexibility.
Typical applications include USB-C powered accessories, power banks, portable and wearable devices, battery-powered industrial sensors, and any sink-side system that must charge reliably from a fully depleted battery.
Design consideration: because the device is powered from VBUS receptacle pins, ensure the CC line ESD and VBUS discharge timing follow the reference design layout for robust hot-plug behavior.
This page adds value beyond the ST datasheet by synthesizing distributor pricing context, same-family drop-in alternatives, and practical design notes in one place.
جایگزین‌های drop-in برای STUSB4531BJR — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
گونه‌ها در این سری
مدل‌های هم‌سری که جایگزین مستقیم هستند برای STUSB4531BJR (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در Dead Battery Mode, Function, Package, RoHS Status.
STUSB4531QTR
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشدهبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←STUSB4531BJR مشخصات
| عملکرد | Standalone USB Type-C / USB PD sink controller |
| USB PD Role | Sink (power receiving device) |
| Negotiated PDOs | Up to 5 configurable |
| VBUS Voltage Rating | 23 V |
| Dead Battery Mode | Yes (STUSB4531BJR / STUSB4531QTR variants) |
| Operating Modes | Autorun mode, Hybrid mode |
| PDO Configuration Storage | Internal non-volatile memory |
| دمای کاری | -40C to +105C |
| بسته‌بندی | 16-pin CSP (chip-scale package) |
| نوع نصب | Surface Mount |
| Software Requirement | None required for basic negotiation (standalone) |
| Typical Supply | Powered directly from VBUS receptacle pins |
| Applications | USB-C sink devices, battery-powered charging systems |
| وضعیت RoHS | RoHS Compliant (per Mouser listing) |
راهنمای پیکربندی پین STUSB4531BJR 16-pin csp (chip-scale package)
پیکربندی پین برای STUSB4531BJR (پکیج 16-pin csp (chip-scale package)). شماره‌گذاری پایه‌ها، عملکردها و نمودارهای اتصال در دیتاشیت سازنده تعریف شده است. برای footprint دقیق و دستورالعمل‌های لحیم‌کاری به آن مراجعه کنید.
داده پین‌آوت تفصیلی موجود نیست برای STUSB4531BJR.
به دیتاشیت برای پیکربندی کامل پین‌ها.
کاربردهای معمول
STUSB4531BJR مناسب است برای 6 کاربردs: Power Banks, Portable and Wearable Devices, Battery-Powered Industrial Sensors, USB-C Powered Accessories, Medical and Health Monitoring Devices, IoT and Smart Home Devices.
Power Banks
The STUSB4531BJR fits power bank sink-side charging because its dead battery mode runs the controller directly from the VBUS receptacle pins, so the unit can negotiate a USB PD contract even at 0% state of charge. In a typical design the controller sits between the USB-C receptacle and the battery charger IC, negotiating up to five PDOs (for example 5V, 9V, 12V, 15V, 18V profiles) and instructing the charger to draw the agreed power. Because negotiation is handled in hardware via internal NVM settings, no firmware is needed, reducing BOM software cost. The 23 V VBUS tolerance protects against source voltage transients during contract renegotiation.
پیشنهادی
Portable and Wearable Devices
Wearables and portable electronics benefit from the STUSB4531BJR's autonomous operation: the 16-pin CSP chip-scale package minimizes PCB area in space-constrained designs, and autorun mode negotiates high-power charging profiles without waking the application processor, preserving battery life. In a typical application the controller draws operating power from VBUS, negotiates the optimal PDO with the charger, and signals the power path management IC to route the negotiated voltage. Dead battery mode is essential for consumer devices that must charge from empty out of the box. The -40C to +105C range also covers outdoor wearable use.
پیشنهادی
Battery-Powered Industrial Sensors
Industrial sensor nodes using USB-C service ports benefit from the STUSB4531BJR's -40C to +105C operating range and 23 V VBUS tolerance, which withstands harsh field conditions and unknown charger quality. The controller autonomously negotiates the fastest available PDO from field chargers and docks without MCU intervention, so a technician can fast-charge or power a sensor node from any USB-PD source. Because PDO settings live in internal non-volatile memory, fleet configuration can be set at production. Dead battery mode guarantees the node responds to charging even after deep discharge during long storage periods.
پیشنهادی
USB-C Powered Accessories
Accessories such as portable displays, desk gadgets, and powered hubs draw all operating power from a USB-C port. The STUSB4531BJR negotiates up to five configurable PDOs so the accessory can request exactly the voltage its internal DC-DC converters need, for example 15V or 18V for higher-power designs. Autorun mode means the accessory works the moment it is plugged in, with no driver or firmware handshake, improving perceived quality. Hybrid mode optionally lets a product MCU monitor the contract for user-facing power indicators while the STUSB4531 keeps autonomous control of the PD protocol.
پیشنهادی
Medical and Health Monitoring Devices
Battery-powered home health devices such as glucose meters, pulse oximeters, and thermometers require guaranteed charging behavior: a device that arrives or returns with an empty battery must still charge. The STUSB4531BJR's dead battery mode, powered directly from the VBUS receptacle pins, satisfies this requirement by negotiating USB PD power independently of the battery's state of charge. The small 16-pin CSP conserves board space in compact handheld enclosures, and the fully hardware-based negotiation removes firmware failure modes from the charging path, supporting the reliability expectations of medical device designs.
پیشنهادی
IoT and Smart Home Devices
USB-C is becoming the standard service port for smart home devices including doorbells, sensors, and controllers. The STUSB4531BJR lets these products fast-charge from standard USB-PD wall adapters by autonomously requesting an appropriate PDO, for example 9V, instead of defaulting to 5V at lower power. With configuration in internal NVM and zero software dependency, OEMs deploy the same controller across product families with different power levels by simply programming the PDO set at manufacturing. Dead battery mode ensures a deeply discharged device revives cleanly on first plug-in, reducing warranty returns.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای STUSB4531BJR — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | STUSB4531QTR |
|---|---|---|
| Package | 16-pin CSP | 16-pin CSP - same |
| Brand | STMicroelectronics | STMicroelectronics |
| USB PD Role | Sink | Sink |
| Configurable PDOs | Up to 5 | Up to 5 |
| VBUS Rating | 23 V | 23 V |
| Dead Battery Mode | Yes | Yes |
| Operating Temperature | -40C to +105C | -40C to +105C |
| Autorun / Hybrid Modes | Yes / Yes | Yes / Yes |
تفاوت‌های کلیدی
- Dead battery operation from VBUS receptacle power (در مقابلSTUSB4500)
- Five configurable PDOs with no firmware (در مقابلGeneric MCU-based PD sink stack)
- 23 V VBUS tolerance in a 16-pin CSP (در مقابلSTUSB4531QTR)
یادداشت‌های طراحی
The STUSB4531BJR is powered directly from the VBUS receptacle pins per the ST datasheet, which is what enables dead battery operation at SOC = 0%. Ensure the VBUS feed to the IC follows the datasheet reference design, including recommended series resistance and ceramic decoupling close to the VBUS pin, so hot-plug inrush and cable discharge transients do not disturb the 23 V-rated pin. Verify downstream charger IC enable thresholds against the lowest negotiated PDO voltage.
The 16-pin CSP has a very fine ball pitch; use the exact land pattern from the ST datasheet and inspect with appropriate solder-mask-defined pads. Route CC1/CC2 as a matched pair with the datasheet-specified series resistors and keep them short and away from switching nodes to preserve USB PD BMC communication integrity on the CC line. Provide local ground return under the CSP for signal integrity.
Do not assume the STUSB4531 will negotiate beyond the PDO set programmed in its internal non-volatile memory - the source can only offer, and the sink only accepts, PDOs contained in that stored configuration. For custom profiles, program the NVM at production. Also remember that only the BJR and QTR variants support dead battery mode; other orderable variants of the family may not, so confirm the suffix before release.
اطلاعات انطباق
Mouser listing identifies STUSB4531BJR as RoHS compliant and active. Other compliance declarations not captured in verified data; obtain certificates from the ST product page.
