SGD5141SD - Wireless Charging Receiver IC | SOT-23-6 | AHX
料号： SGD5141SD ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0.18 | $0.18 |
| 10 | $0.15 | $1.50 |
| 100 | $0.12 | $12.00 |
| 500 | $0.1 | $50.00 |
| 1,000 | $0.08 | $80.00 |
SGD5141SD 概述
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.
直接替换替代料： SGD5141SD ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
SGD5141SD 规格参数
| Product Type | Wireless Charging Receiver IC |
| Operating Frequency | 100 kHz to 205 kHz (Qi band) |
| Protection Features | Over-current, Over-temperature |
| 封装 | SOT-23-6 |
| Package Body Size | 2.9 mm x 1.6 mm |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
SGD5141SD 引脚配置
| 引脚 1 | COIL+ — Receiver coil terminal (positive) |
| 引脚 2 | COIL- — Receiver coil terminal (negative) |
| 引脚 3 | GND — Ground |
| 引脚 4 | OUT — Regulated DC output |
| 引脚 5 | ADJ — Output voltage adjust / feedback |
| 引脚 6 | VCC — Internal supply / bypass |
典型应用
SGD5141SD 适用于 6 应用s: 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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： SGD5141SD ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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 |
关键差异点
- Smallest wireless charging receiver footprint available （对比 QFN-packaged competitors)
- Integrated synchronous rectification （对比 Discrete diode-bridge receivers)
- Single-brand family with confirmed pin compatibility （对比 SGD5141SC)
设计说明
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.
合规信息
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.
