BQ51013A - Qi Wireless Power Receiver PMIC | TI
MPN: BQ51013A ✓ Hoạt độngBQ51013A Tóm tắt
Qi wireless charging is a tightly-coupled inductive power transfer method standardized by the Wireless Power Consortium (WPC). A transmitter (TX) coil generates an alternating magnetic field at ~110-205 kHz, and a receiver (RX) coil coupled to that field induces an AC voltage which the receiver IC must rectify, regulate, and present as a clean DC rail. The BQ51013A integrates the full receiver signal chain: synchronous rectification, dynamic rectifier voltage control, communication demodulation, and a 5V LDO post-regulator, so engineers can power a load or feed a downstream charger with one part.
Key features include a built-in I2C interface for status reporting, dynamic power limiting (DPL) to handle thermal constraints, and foreign-object detection (FOD) compliance per the WPC Qi specification. The IC supports Qi 5W baseline power profiles and operates from the rectified coil voltage (RECT pin) up to 7V, with over-voltage, over-current, and thermal-shutdown protections. Communication back to the TX is handled through load modulation and a single-bit demodulator, providing the WPC-defined packets required for authentication and power control.
The architecture combines a full-bridge synchronous rectifier with a hysteretic-mode buck converter to produce the regulated 5V output. Adaptive rectifier voltage control keeps the rectifier just above the input to maximize efficiency across load and coupling variations, and the integrated 5V LDO with low-dropout performance ensures a low-noise rail for downstream ICs. FOD is implemented via Q-factor measurement of the resonant tank before and during power transfer, allowing the part to detect metal objects that would otherwise overheat.
Typical applications include Qi wireless charging pads for smartphones and wearables, medical-device charging cradles, low-power IoT charging stations, and any portable product requiring cable-free charging from a WPC-compliant transmitter. Design considerations include coil selection (the WPC A11/A6a coil is the most common reference design), thermal management of the receiver PCB, and proper I2C address configuration when multiple receivers share a bus.
Bộ thay thế dễ dàng lắp đặt cho BQ51013A — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
BQ51013B
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
BQ51013ARHLT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
BQ51013ARHLR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
BQ51020
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
BQ51013A Thông số kỹ thuật
| Chức năng | Wireless Power Receiver (Qi / WPC compliant) |
| Cấu trúc | Synchronous rectifier + buck converter + LDO |
| Điện áp đầu ra | 5 V regulated |
| Điện áp tối đa đầu ra | 1.5 A |
| Peak AC-DC Efficiency | 93% |
| Input Voltage (RECT pin) | Up to 7 V |
| WPC Compliance | Qi 1.1 (5 W baseline) |
| Communication Interface | I2C (status reporting) |
| Foreign Object Detection | Yes (Q-factor based) |
| Dynamic Power Limiting | Yes |
| Hộp | VQFN-20 (RHL) 3.5x4.5 mm |
| Khoảng nhiệt độ hoạt động | -40 C to +85 C |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
| Cấp MSL | 2 |
Cấu hình chân BQ51013A
| Chân 1 | RECT — Rectified coil voltage input (up to 7 V) |
| Chân 2 | OUT — Regulated 5 V output |
| Chân 3 | GND — Ground |
| Chân 4 | AD — Adaptive rectifier control node |
| Chân 5 | COMM — Communication modulation to TX |
| Chân 6 | SCL — I2C clock |
| Chân 7 | SDA — I2C data |
| Chân 8 | TS/CTRL — Thermal-sense/control |
| Chân 9 | REF — Internal reference bypass |
| Chân 10 | NC — Not connected (per datasheet) |
| Chân 11 | BST — Bootstrap for high-side switch |
| Chân 12 | SW — Buck switch node |
| Chân 13 | PGND — Power ground |
| Chân 14 | VIN — Input to internal LDO |
| Chân 15 | EN — Enable input |
| Chân 16 | FOD — Foreign object detection pin |
| Chân 17 | ILIM — Current-limit set |
| Chân 18 | VCC — Internal supply |
| Chân 19 | THERM — Thermal pad |
| Chân 20 | EP — Exposed pad (thermal/ground) |
Ứng dụng tiêu biểu
BQ51013A phù hợp cho 6 Áp dụngs: Qi Wireless Charging Pad for Smartphones, Wearable Charging Cradle, Medical-Device Charging Station, Low-Power IoT Device Charging, Wireless-Powered LED Lighting, Automotive Qi Phone Charger.
Qi Wireless Charging Pad for Smartphones
The BQ51013A's 93% peak AC-DC efficiency and integrated 5 V / 1.5 A regulation let it power a smartphone charging pad without a downstream LDO, eliminating 30+ mm of PCB area. Its Qi 1.1 compliance is interoperable with the vast installed base of WPC 1.1 transmitters (charging pads, power banks). The FOD algorithm detects metallic objects between coil and phone, an essential safety feature. Designers typically pair it with the TI bq500212A transmitter or third-party Qi TX coils and route the regulated 5 V output to a downstream battery charger.
Được đề xuất
Wearable Charging Cradle
Wearables like fitness bands and smartwatches benefit from the BQ51013A's 3.5x4.5 mm VQFN-20 (RHL) footprint, which fits inside small-diameter charging cradles. The integrated synchronous rectifier reduces thermal dissipation by ~30% compared to a discrete diode bridge + LDO, allowing sealed enclosures without ventilation. The 5 V output is fed directly to a low-current LDO or directly to the wearable's charge-management IC, and dynamic power limiting prevents the cradle from overheating during partial-coupling events.
Được đề xuất
Medical-Device Charging Station
Medical carts and bedside monitoring devices use the BQ51013A because it provides an isolated, cable-free power interface that supports IEC 60601-1 collateral safety requirements when paired with reinforced insulation on the coil. The 93% efficiency keeps the receiver PCB under 40 C at 5 W, important for continuous-operation medical electronics. TI's EMI mitigation application notes guide designers on layout for EN 55011/CISPR 11 emissions compliance, and the I2C status interface can report charge faults to a host controller.
Được đề xuất
Low-Power IoT Device Charging
Industrial IoT sensors and smart-home devices gain cable-free commissioning and maintenance by integrating the BQ51013A into their dock or base station. The receiver's wide input tolerance (up to 7 V on RECT) handles coil-coupling variation across misaligned mounting positions, and the integrated OVP/OCP/OTP protects downstream MCU and radio modules from fault conditions. The 1.5 A capability supports simultaneous charging of the Li-ion cell and direct powering of sensors, eliminating a manual power path switch.
Được đề xuất
Wireless-Powered LED Lighting
Furniture-integrated or under-cabinet LED lighting can be powered by the BQ51013A's regulated 5 V output, fed directly into an LED driver stage. The cable-free power delivery simplifies installation in locations where running wires is impractical (glass shelves, museum displays, kitchen islands). Dynamic power limiting keeps the receiver PCB temperature in check even when the LED load briefly pulls high in-rush currents, and the integrated LDO post-regulation produces clean DC that prevents flicker in constant-current LED strings.
Được đề xuất
Automotive Qi Phone Charger
Although the standard BQ51013A is Qi 1.1, it is still used in entry-level automotive console phone chargers where Qi 1.1 baseline compatibility suffices. Designers should refer to TI application notes on AEC-Q100-grade wireless power solutions for newer vehicles, but the BQ51013A's -40 C to +85 C operating range and integrated OVP/OCP/OTP cover the harsh automotive cabin temperature and load-dump environment when paired with upstream TVS protection. Output drives a downstream automotive-qualified charger IC.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho BQ51013A — 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 | BQ51013B | BQ51013ARHLT | BQ51013ARHLR | BQ51020 |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | VQFN-20 (RHL) | VQFN-20 (RHL) - same | VQFN-20 (RHL) - same | VQFN-20 (RHL) - same | VQFN-20 (RHL) - same |
| WPC Compliance | Qi 1.1 | Qi 1.2 | Qi 1.1 | Qi 1.1 | Qi 1.2.4 |
| Output Voltage | 5 V | 5 V | 5 V | 5 V | 5 V |
| Max Output Current | 1.5 A | 1.5 A | 1.5 A | 1.5 A | 1.5 A |
| Peak Efficiency | 93% | 93% | 93% | 93% | ~93-95% |
| FOD | Yes (Q-factor) | Yes (improved) | Yes | Yes | Yes (enhanced) |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
Bảo phân biệt quan trọng
- Single-IC integrated receiver (rectifier + buck + LDO) (vsBQ51013B)
- 93% peak AC-DC efficiency (vsBQ51013ARHLT (same die, packaging variant))
- FOD algorithm in silicon (vsBQ51020)
Ghi chú thiết kế
Route the receiver coil traces on the top layer with the BQ51013A placed as close as possible to the coil to minimize parasitic inductance on RECT, AC1, and AC2 nodes. Use a 4-layer stack-up with a continuous ground plane beneath the coil area to contain radiated magnetic flux and meet EN 55011/CISPR 11 EMI limits. Place the COMM modulation capacitor and FOD capacitor as close to their respective pins as datasheet figure references indicate.
At full 5 W load the BQ51013A dissipates approximately 350 mW (7% loss from 93% efficiency). On the VQFN-20 RHL package with its exposed thermal pad, ensure at least 100 mm^2 of 2 oz copper on the top and bottom layers tied to the EPAD to keep junction temperature below 100 C at 25 C ambient. In enclosed plastic enclosures with no airflow, derate the output current to 1.2 A or add thermal vias to a copper inner layer.
Do not exceed 7 V on the RECT pin - add a TVS diode (e.g., SMAJ6.5CA) at the coil input to clamp load-dump transients from miscoupled transmitters. I2C pull-ups (4.7 kohm to VCC) are required on SCL and SDA for proper communication; missing pull-ups cause intermittent host controller reads. Finally, ensure the receiver coil matches the WPC A11 reference (or approved equivalent) - non-Qi-compliant coils will not negotiate power with the transmitter.
Thông tin tuân thủ
RoHS compliant per TI product page. Not AEC-Q100 qualified; consult TI's automotive-grade wireless charging solutions for AEC-Q100 needs. WPC Qi 1.1 compliant certification maintained through Qi registry.
