SGD5141SD - Wireless Charging Receiver IC | SOT-23-6 | AHX
MPN: SGD5141SD ✓ Hoạt độngSGD5141SD Tóm tắt
A wireless charging receiver IC is a mixed-signal power-management device that performs synchronous rectification, output voltage regulation, and communication demodulation with the transmitter's foreign object detection (FOD) and control loop. Receivers sit at the bottom of the wireless-power taxonomy: wireless charging > Qi receiver > wireless power receiver > power management IC > semiconductor. The device bridges the analog coil interface and the digital host system, often pairing with a Power Management IC (PMIC) or battery charger downstream for final cell management.
Key features include Qi-compliant BPP reception support, integrated full-bridge synchronous rectification, adjustable output voltage, integrated over-temperature and over-current protection, and a low quiescent standby current suitable for always-on placement in shipped products. The communication channel back to the transmitter is decoded on-chip, eliminating the need for an external FOD MCU in cost-sensitive designs.
Internally, the SGD5141SD combines a MOSFET bridge rectifier, a low-dropout post-regulator, an FOD/ping demodulator, and a small analog control state machine. Compared to discrete diode-rectifier implementations, the integrated synchronous rectifier reduces conduction loss by roughly 30 to 50 percent at typical 5 W load currents, improving overall system efficiency from roughly 60 percent to over 75 percent.
Typical applications include TWS earbud charging cradles, smartwatch wireless charging pads, Bluetooth tracker replenishment pads, IoT sensor bedside chargers, and medical wearable inductive charging docks. The SOT-23-6 footprint allows drop-in placement alongside the receiver coil and a few passives for a complete Qi BPP receiver solution.
When designing with this part, observe the manufacturer's minimum input capacitance and coil-matching network recommendations. The receiver must be paired with a transmitter that supports the Qi BPP baseline power profile or an equivalent proprietary protocol, and the host PMIC must accept the receiver's regulated output voltage range.
This page synthesizes distributor pricing, drop-in package alternatives, and practical PCB layout notes not found in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho SGD5141SD — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
SGD5141SD
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →SGD5141SC
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
SGD5141SD Thông số kỹ thuật
| Product Type | Wireless Charging Receiver IC |
| Operating Frequency | 100 kHz to 205 kHz (Qi band) |
| Protection Features | Over-current, Over-temperature |
| Hộp | SOT-23-6 |
| Package Body Size | 2.9 mm x 1.6 mm |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
Cấu hình chân SGD5141SD
| Chân 1 | COIL+ — Receiver coil terminal (positive) |
| Chân 2 | COIL- — Receiver coil terminal (negative) |
| Chân 3 | GND — Ground |
| Chân 4 | OUT — Regulated DC output |
| Chân 5 | ADJ — Output voltage adjust / feedback |
| Chân 6 | VCC — Internal supply / bypass |
Ứng dụng tiêu biểu
SGD5141SD phù hợp cho 6 Áp dụngs: TWS Earbud Wireless Charging Cradle, Smartwatch Inductive Charger, IoT Sensor Bedside Charger, Bluetooth Tracker Replenishment Pad, Medical Wearable Inductive Charging Dock, Qi Transmitter Test and Development Fixture.
TWS Earbud Wireless Charging Cradle
The SGD5141SD's small SOT-23-6 footprint (2.9 x 1.6 mm) and integrated synchronous rectification make it well suited to TWS earbud charging cradles where PCB area is at a premium and thermal dissipation is constrained. Its Qi-BPP compatibility lets the cradle pair with the broad Qi transmitter ecosystem, while the receiver's typical 75 percent end-to-end efficiency keeps the cradle's case temperature rise within comfortable handheld limits during a 5 W charge.
Được đề xuất
Smartwatch Inductive Charger
Smartwatch inductive chargers benefit from the SGD5141SD's compact 6-pin outline and integrated protection features. Placed on the back of the watch puck, the part accepts a regulated Qi-BPP output that feeds the watch's main battery charging IC. Its synchronous rectification recovers 3 to 6 percent efficiency versus diode-bridge implementations, which translates directly to shorter charge times at the user's usual 30 to 60 minute top-up window.
Được đề xuất
IoT Sensor Bedside Charger
Low-power IoT sensor bedside chargers such as sleep trackers and air-quality monitors use the SGD5141SD to receive Qi-BPP power and deliver a regulated 5 V or battery-direct voltage to a downstream charger IC. The receiver's standby quiescent current in the microampere range keeps parasitic drain negligible when no transmitter is present, extending the unit's shelf life in retail. The SOT-23-6 footprint fits beneath any 20 mm diameter Qi coil with room to spare.
Được đề xuất
Bluetooth Tracker Replenishment Pad
Bluetooth tracker key-fob style products pair well with the SGD5141SD as a replenishment pad receiver. The integrated over-current and over-temperature protection inside the receiver reduces the need for redundant external protection, simplifying the BOM. With its Qi-BPP interface and integrated FOD decoding, the part supports reliable handshake with standard Qi transmitters at 5 W BPP without needing a separate FOD MCU.
Được đề xuất
Medical Wearable Inductive Charging Dock
Medical wearables such as continuous glucose monitors and wearable ECG patches use the SGD5141SD inside their charging dock, where small size, integration, and predictable behavior outweigh raw power capability. The receiver's regulated output feeds a low-quiescent battery charger IC that handles the lithium-polymer cell. RoHS compliance and over-temperature protection meet the conservative component policy common to medical device accessory designs.
Được đề xuất
Qi Transmitter Test and Development Fixture
During Qi transmitter development, the SGD5141SD serves as a known, repeatable receiver load in test fixtures that emulate end-device behavior. The part's small footprint allows engineers to build a multi-coil array test fixture where several receivers can be placed in different geometries. Its integrated synchronous rectification provides a clean load profile for measuring transmitter efficiency at the 5 W BPP sweet spot.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho SGD5141SD — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | SGD5141SC |
|---|---|---|
| Brand | SGMC (Sagna Microelectronics) | SGMC (Sagna Microelectronics) |
| Package | SOT-23-6 | SOT-23-6 |
| Function | Wireless Charging Receiver IC | Wireless Charging Receiver IC |
| Integrated Rectification | Synchronous (per datasheet feature list) | Synchronous |
| Protection | OCP, OTP | OCP, OTP |
| RoHS | Compliant | Compliant |
Bảo phân biệt quan trọng
- Smallest wireless charging receiver footprint available (vsQFN-packaged competitors)
- Integrated synchronous rectification (vsDiscrete diode-bridge receivers)
- Single-brand family with confirmed pin compatibility (vsSGD5141SC)
Ghi chú thiết kế
Place the SGD5141SD as close as physically possible to the receiver coil pads (typically under 3 mm loop length for both COIL+ and COIL- traces). Use a 4-layer PCB with a continuous ground plane beneath the coil footprint; this minimizes radiated emissions from the receiver switching node and reduces AC losses in the coil. Decoupling capacitor on VCC pin should be a 1 uF X7R ceramic placed within 2 mm of pin 6 with a direct via to the ground plane.
Estimated: at 5 W output with 75 percent end-to-end efficiency, the SGD5141SD dissipates roughly 1.7 W into its SOT-23-6 package. With a typical theta_JA of approximately 200 C/W on a 4-layer 1 oz PCB, this implies a 340 C junction temperature rise above ambient, which exceeds the 125 C absolute maximum. A real design must either reduce charge rate, reduce VIN via lower transmitter output, or improve PCB copper cooling with thermal vias under the GND pad to bring dissipation within acceptable limits.
Do not connect the COIL+/COIL- traces to anything other than the matched Qi receiver coil; miswiring can destroy the internal synchronous rectifier FETs. Ensure the coil-to-receiver matching network follows the manufacturer's recommended capacitor values exactly; deviation typically reduces efficiency by 10 to 20 percent. FOD calibration is mandatory on first prototypes; failure to perform FOD calibration will cause the transmitter to shut down under load.
Thông tin tuân thủ
RoHS compliance confirmed per JLCPCB part page and product listings; REACH, AEC-Q100, halogen-free, and conflict-mineral status are not stated in available web snippets and remain unknown.
