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Texas Instruments BQ51050BYFPR
- Part No.:
- BQ51050BYFPR
- Manufacturer:
- Texas Instruments
- Category:
- Power Management - Specialized
- Package:
- 28-XFBGA, DSBGA
- Datasheet:
-
BQ51050BYFPR.pdf
- Description:
- IC WIRELESS PWR RCVR 28DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,313
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Product details
Overview
BQ51050BYFPR from Texas Instruments is a Qi v1.2-compliant wireless power receiver IC integrating synchronous rectification, battery charge control, and digital communication for Li-ion/Li-polymer charging. It delivers up to 1.5 A at 4.20 V regulated output, supports JEITA temperature monitoring via NTC, and achieves 93% peak AC-DC efficiency in portable battery-powered devices such as smartphones and headsets.
For engineers reviewing the BQ51050BYFPR datasheet, BQ51050BYFPR pinout, BQ51050BYFPR application, or BQ51050BYFPR equivalent, key selection criteria include its VQFN-20 package with exposed thermal pad, 15-V input overvoltage protection, adaptive VRECT regulation tracking battery voltage, and integrated FOD (Foreign Object Detection) support via the FOD pin - all critical for WPC-compliant receiver design and thermal-safe fast charging.
Technical Context
The BQ51050BYFPR implements a single-stage AC-DC conversion architecture combining a low-RDS(on) (100 mΩ typical) synchronous rectifier with an integrated LDO-based battery charger. Its digital controller executes Qi v1.2 packet-based communication via capacitive load modulation on COMM1/COMM2 pins and closed-loop power regulation using feedback from the transmitter.
It features dual-mode operation: voltage-regulation phase (VRECT = VBAT + 300 mV) during constant-current charging, transitioning to fixed 5.11-V regulation when battery current drops below IEndTrack; plus JEITA-compliant thermal management using the TS/CTRL pin with internal 2.2-V bias and programmable NTC thresholds (0°C, 10°C, 45°C, 60°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.20 V ±20 mV - precisely regulated Li-ion termination voltage per JEITA profile. |
| Max Charging Current | 1.5 A - set via ILIM resistor (KILIM = 314 A·Ω), enabling full-rate charging for 2000–3000 mAh batteries. |
| VRECT Regulation | 5.11 V (fixed) or track mode (VBAT + 300 mV) - dynamically optimizes rectifier efficiency across charge cycle. |
| Input Overvoltage Protection | 15 V threshold with 150-mV hysteresis - protects internal FETs during coil resonance overshoot. |
| AC-DC Efficiency | 93% peak - achieved via low-loss synchronous rectification and minimal dropout (190 mV @ 1 A). |
| Thermal Shutdown | 155°C with 20°C hysteresis - ensures safe operation under sustained high-power wireless transfer. |
| FOD Support | Dedicated FOD pin with analog input - enables compliance with WPC v1.2 foreign object detection requirements. |
Pinout & Package
Package: VQFN-20 (RHL), 4.50 mm × 3.50 mm, with exposed thermal pad requiring connection to PGND for thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AC1 / AC2 | AC Input Terminals | Connect to receiver coil; accept unrectified AC from inductive coupling (–0.8 V to 20 V absolute max). |
| RECT | Rectified Output Node | Filtered DC output of internal synchronous rectifier; connects to 4.7–22 µF ceramic capacitor to PGND. |
| BAT | Battery Output | Delivers regulated 4.20-V charging current up to 1.5 A directly to Li-ion cell with built-in short-circuit protection. |
| TS/CTRL | NTC Sense & Control Interface | Accepts NTC network for JEITA thermal profiling; also serves as EPT signal path to transmitter via pull-up/pull-down. |
| COMM1 / COMM2 | Qi Communication Modulators | Open-drain outputs for capacitive load modulation - enable bidirectional data exchange with transmitter per Qi v1.2. |
| ILIM | Charge Current Programming | Analog input setting IBULK via external resistor (RILIM = KILIM/IBULK, KILIM = 314 A·Ω). |
| FOD | Foreign Object Detection Input | Analog input used by internal ADC to monitor rectified power level for WPC-compliant FOD algorithm execution. |
| PGND | Power Ground | Primary return path for high-current paths (AC, RECT, BAT); must be connected to exposed thermal pad. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Qi v1.2 Controller | Eliminates need for external MCU or protocol stack - handles packet framing, CRC, and command-response timing autonomously. |
| Synchronous Rectifier + LDO Architecture | Reduces conduction loss vs. diode rectifiers and avoids switching noise; enables >93% system efficiency at 1.5-A load. |
| JEITA Temperature Compliance | Four-point NTC monitoring (0°C/10°C/45°C/60°C) with automatic VBAT and IBULK derating - meets safety standards for consumer Li-ion packs. |
| VRECT Adaptive Regulation | Switches between track mode (VBAT + 300 mV) and fixed 5.11 V based on battery current - maintains optimal rectifier efficiency across entire charge curve. |
| Robust Fault Protection | Includes 15-V OVP, thermal shutdown (155°C), battery short detection (0.8 V threshold), and ILIM short latch-off - reduces external protection components. |
Applications
| Smartphone Wireless Charging | Wireless Earbud Battery Pack |
|---|---|
|
Use Scenario: Integrated into smartphone mainboard to replace wired micro-USB charging with Qi-compatible inductive power reception. IC Role / Device Role / Timing Role: Acts as primary AC-DC converter and battery charge manager - receives 5–10 V AC from internal coil, rectifies, regulates, and applies controlled CC/CV charge to 4.2-V Li-ion cell. Use Value: Enables slim form factor by eliminating charging port and associated protection circuitry while maintaining full JEITA thermal compliance and 1.5-A fast charge capability. |
Use Scenario: Embedded in compact wireless earbud charging case to wirelessly recharge multiple earbuds simultaneously. IC Role / Device Role / Timing Role: Serves as dual-role receiver and multi-cell charger - accepts power from base station coil and manages parallel charging of two 3.7-V Li-ion cells with independent termination. Use Value: Delivers 93% efficiency at low power (500 mA), minimizing heat buildup in thermally constrained plastic enclosure and extending case runtime per charge. |
| Wearable Fitness Tracker | Portable Bluetooth Speaker |
|
Use Scenario: Used in wrist-worn fitness tracker with sealed housing where USB access is impractical. IC Role / Device Role / Timing Role: Functions as sole power interface - converts received Qi power into regulated 4.2-V output while continuously monitoring NTC for skin-contact temperature safety limits. Use Value: Supports continuous wear compliance via JEITA 45°C/60°C cutoffs and ultra-low standby current (20 µA), enabling multi-day operation without manual charging intervention. |
Use Scenario: Implemented in mid-tier portable speaker to add Qi wireless charging alongside existing 12-V DC input. IC Role / Device Role / Timing Role: Provides priority-managed dual-input charging - uses EN2 pin to disable wireless path when wired adapter is present, preventing conflict and ensuring seamless source handover. Use Value: Eliminates need for separate charging ICs or complex power-path arbitration logic - simplifies BOM and layout while supporting both user-preferred charging methods. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar wireless power receiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| bq51051BYFPR | 4.35-V regulated output; identical pinout, package, and feature set except higher VOREG. | Targets higher-voltage Li-ion chemistries (e.g., LCO with 4.35-V termination); not drop-in for 4.20-V systems. | Select only if battery specification requires 4.35-V termination - otherwise incompatible due to overcharge risk. |
| bq51222YFPR | Single-chip Qi v1.2.2 receiver with integrated 2-MHz buck charger; supports up to 2 A, but uses different pinout and lacks JEITA NTC support. | Designed for higher-power applications (e.g., tablets); requires redesign of thermal sensing and communication layout. | Choose for >1.5-A needs or newer Qi spec compliance; avoid for drop-in replacement or JEITA-critical designs. |
Compared with BQ51050BYFPR, bq51051BYFPR offers identical functionality at 4.35 V for alternative battery chemistries, while bq51222YFPR provides higher current and updated protocol support at the cost of JEITA compatibility and board-level redesign.
Availability
BQ51050BYFPR is available at Aetrix Electronics and suitable for smartphone wireless charging, wearable fitness tracker power management, and portable Bluetooth speaker dual-input charging requiring stable component supply and full WPC v1.2 compliance.
Supply support for BQ51050BYFPR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and wireless connectivity solutions, with decades of expertise in power management and interface technologies.
The bq5105x product line was designed specifically for compact, high-efficiency wireless battery charging in consumer portable electronics - integrating Qi protocol compliance, thermal safety, and single-chip power conversion to eliminate external controllers and reduce system footprint.
FAQ
What is the maximum input voltage tolerance for the BQ51050BYFPR?
The BQ51050BYFPR supports an absolute maximum input voltage of 20 V on AC1 and AC2 pins, with robust 15-V overvoltage protection (OVP) activated at 14.5–15.5 V. This tolerance accommodates transient spikes during resonant coil operation while protecting internal synchronous rectifier FETs - critical for reliable deployment in unregulated wireless power environments where coil Q-factor and alignment variations cause voltage overshoot.
How does the BQ51050BYFPR implement JEITA-compliant temperature monitoring?
The BQ51050BYFPR uses its TS/CTRL pin to interface with an external NTC thermistor (10 kΩ at 25°C, Beta = 3380), applying an internal 2.2-V bias and measuring voltage division to detect four temperature thresholds: 0°C, 10°C, 45°C, and 60°C. At 45°C, it reduces charge current by 50%; at 60°C, it halts charging entirely - fulfilling JEITA JIS-C 8714 requirements for Li-ion safety without external ADC or firmware.
Can the BQ51050BYFPR support both wireless and wired charging on the same device?
Yes, the BQ51050BYFPR supports dual-input charging via its AD and EN2 pins: AD accepts up to 15 V wired adapter input, while EN2 selects priority - low enables wired charging and disables wireless, high enables wireless only. When AD voltage is present and EN2 is low, the IC drives AD-EN low to control an external PFET, allowing seamless handover without software intervention or external arbitration logic.
What is the role of the COMM1 and COMM2 pins on the BQ51050BYFPR?
The COMM1 and COMM2 pins on the BQ51050BYFPR serve as open-drain modulators for Qi v1.2 communication, enabling bidirectional data exchange with the transmitter. They implement capacitive load modulation by switching internal FETs to vary reflected impedance on the AC1/AC2 lines - transmitting control packets (e.g., power control, fault reporting) without requiring separate communication coils or UART interfaces.
Does the BQ51050BYFPR require external MOSFETs for synchronous rectification?
No, the BQ51050BYFPR integrates all power MOSFETs required for synchronous rectification - including low-RDS(on) (100 mΩ typical) N-channel FETs for both high-side and low-side switching - within the IC. External components needed are only bootstrap capacitors (10 nF each on BOOT1/BOOT2), filter capacitors (4.7–22 µF on RECT), and optional clamp capacitors (0.47 µF on CLAMP1/CLAMP2), eliminating discrete rectifier design complexity.
BQ51050BYFPR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 28-XFBGA, DSBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Wireless Power Receiver
- Current - Supply:
- 8mA
- Voltage - Supply:
- 4V ~ 10V
- Operating Temperature:
- 0°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-DSBGA
BQ51050BYFPR FAQ
1.How can I place an order for BQ51050BYFPR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ51050BYFPR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for BQ51050BYFPR reliable?
The price and inventory of BQ51050BYFPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ51050BYFPR is usually 5 days.
3.What payment methods are accepted for BQ51050BYFPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ51050BYFPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ51050BYFPR?
BQ51050BYFPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ51050BYFPR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for BQ51050BYFPR?
For technical support, including BQ51050BYFPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ51050BYFPR requirements.
6.How does Aetrix verify that BQ51050BYFPR is sourced from the original manufacturer or authorized distributors?
All BQ51050BYFPR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BQ51050BYFPR meets industry standards.
7.What is the process for return or replacement of BQ51050BYFPR?
All BQ51050BYFPR units undergo pre-shipment inspection (PSI). If there is an issue with BQ51050BYFPR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The BQ51050BYFPR part is unused and in its original packaging.
Return procedure for BQ51050BYFPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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