My Inquiry
My Account
Texas Instruments BQ51222YFPT
- Part No.:
- BQ51222YFPT
- Manufacturer:
- Texas Instruments
- Category:
- Power Management - Specialized
- Package:
- 42-XFBGA, DSBGA
- Datasheet:
-
BQ51222YFPT.pdf
- Description:
- IC WIRELESS PWR RCVR 42DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:404
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BQ51222YFPT from Texas Instruments is a dual-mode wireless power receiver IC supporting both WPC v1.2 Qi and PMA standards, integrating synchronous rectification, post-regulation, and protocol-aware digital control in a single DSBGA-42 package. It delivers up to 1.0 A output current at adjustable 4.5–8 V, achieves 97% post-regulator efficiency and 79% system-level efficiency at 5 W, and enables compact inductorless receiver designs for smartphones and power banks.
For engineers reviewing the BQ51222YFPT datasheet, BQ51222YFPT pinout, BQ51222YFPT application, or BQ51222YFPT equivalent, key selection considerations include dual-standard communication compliance, hardware-programmable output voltage via VO_REG, dynamic rectifier control for transient response, thermal shutdown at 155°C, and I²C interface for host configuration and RXID readback.
Technical Context
The BQ51222YFPT implements autonomous protocol detection between WPC v1.2 (2 kb/s bi-phase encoded packets) and PMA (continuous symbol-based signaling including INC/DEC/EOC), eliminating external firmware or mode-selection logic. Its integrated synchronous rectifier uses BOOT1/BOOT2-driven high-side FETs with half-synchronous mode activation below 100 mA load, while CLAMP1/CLAMP2 pins provide secondary-side voltage clamping during low-power or fault conditions.
Dual-mode operation is coordinated through dedicated COMM1/COMM2 pins for reflected-impedance modulation and TS/CTRL for temperature sensing or EPT/EOC signaling. Output regulation is managed by an internal LDO with VO_REG feedback (0.5013 V typical) and dynamic rectifier voltage targeting-shifting between VOUT + 0.12 V and VOUT + 2.0 V based on load percentage and RILIM-set current limit.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Wireless Standards | WPC v1.2 Qi and Power Matters Alliance (PMA) compliant - enables interoperability with both major charging ecosystems without external protocol translation. |
| Output Current | 1.0 A maximum continuous - supports fast-charging loads in smartphones and portable power banks. |
| Output Voltage Range | 4.5 V to 8.0 V, adjustable via external VO_REG resistor divider - allows optimization of coil coupling, thermal performance, and downstream charger compatibility. |
| System Efficiency | 79% at 5 W output - achieved via fully synchronous rectification (96%) and 97% efficient post-regulator, reducing thermal load in space-constrained receivers. |
| Communication Interface | I²C (100 kHz, 1.8-V logic) - enables host MCU configuration of VO_REG, readback of unique 6-byte RXID, and real-time status monitoring. |
| Thermal Protection | Junction shutdown at 155°C with 20°C hysteresis - prevents permanent damage during sustained overload or poor thermal design. |
| Package | DSBGA-42, 3.586 mm × 2.874 mm - ultra-low-profile chip-scale package suitable for thin mobile devices and back-cover implementations. |
Pinout & Package
Package: 42-pin DSBGA (YFP), body size 3.586 mm × 2.874 mm, 0.4-mm pitch, bottom-side thermal pad for PCB heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AC1 / AC2 | AC input | Primary resonant tank connection points - accepts magnetically coupled RF energy from transmitter coils; supports both WPC and PMA topologies. |
| RECT | Rectifier output | Internal synchronous rectifier output node - feeds regulated LDO stage; voltage dynamically adjusted between VOUT + 0.12 V and VOUT + 2.0 V per load condition. |
| OUT | Regulated DC output | Delivers final 4.5–8 V power to battery charger or system load; rated for 1.0 A continuous with overcurrent protection via ILIM pin. |
| COMM1 / COMM2 | Communication driver | Open-drain FETs for load modulation - reflect impedance changes to transmitter for WPC packet transmission or PMA symbol encoding. |
| CLAMP1 / CLAMP2 | Voltage clamp control | Enable low-impedance path across secondary winding - suppresses overvoltage transients during startup or misalignment events. |
| VO_REG | Output voltage feedback | Analog input setting LDO reference - 0.5013 V typical threshold; external resistor divider determines final VOUT (4.5–8 V range). |
| SCL / SDA | I²C interface | Standard two-wire bus for host configuration - supports register access, RXID readback, and real-time status reporting (e.g., PD_DET, WPG). |
| TS/CTRL | Temperature sense / control | Analog input for NTC thermistor; also accepts logic-high signal to trigger end-of-power-transfer (EPT) or end-of-charge (EOC) to transmitter. |
| ILIM | Current limit programming | Analog input setting hardware overcurrent threshold - resistor value defines 1500-mA max limit range; enables latch-off short-circuit protection. |
| BOOT1 / BOOT2 | Bootstrap drive | Gate drive supply for internal high-side rectifier FETs - requires external 100-nF ceramic capacitors for stable switching. |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic Rectifier Control | Adjusts RECT voltage target in real time (VOUT + 0.12 V to VOUT + 2.0 V) based on load percentage - improves transient response without requiring external compensation. |
| Dual-Standard Communication Engine | Hardware-accelerated WPC v1.2 packet handling and PMA symbol generation - eliminates need for external microcontroller or firmware development. |
| Patented Pad Detect (PD_DET) | Open-drain output asserting when receiver detects valid magnetic field - enables host to distinguish true charging events from ambient RF noise. |
| Adapter Mode Mux (AD-EN) | Push-pull driver enabling external adapter input pass-through - allows seamless transition between wireless and wired charging paths using single power rail. |
| Low-Power Rectifier Boost (LPRB1/LPRB2) | Active at light loads (0–350 mA) to elevate RECT voltage - prevents input collapse during sudden load steps in back-cover or embedded solutions. |
Applications
| Smartphone Wireless Charging | Power Bank Receiver Module |
|---|---|
Use Scenario: Integrated into slim smartphone rear housing to enable Qi/PMA charging without compromising battery volume. IC Role / Device Role / Timing Role: Dual-mode receiver IC performing AC-to-DC conversion, protocol negotiation, and output regulation - replaces discrete rectifier + MCU + transceiver solution. Use Value: Reduces bill-of-materials count by 3+ components and enables <3.5-mm total stack height due to inductorless architecture and DSBGA-42 footprint. |
Use Scenario: Embedded in portable power bank to accept wireless input while delivering USB-C output to host devices. IC Role / Device Role / Timing Role: Primary power conversion and communication controller - manages power transfer handshake, thermal safety, and host-reported status via I²C. Use Value: Supports simultaneous charge acceptance from multiple transmitter types (Qi-certified pads, Duracell PMA stations), increasing user compatibility and market reach. |
| Tablet Back-Cover Charging | Wi-Fi Hotspot Portable Charger |
Use Scenario: Mounted on detachable tablet back cover with integrated coil, powering internal battery via flexible PCB traces. IC Role / Device Role / Timing Role: Autonomous receiver managing coil alignment tolerance, dynamic rectifier headroom, and thermal derating - operates without host intervention. Use Value: Enables plug-and-play accessory ecosystem with no firmware updates required; LPRB1/LPRB2 pins ensure stable startup under variable load profiles. |
Use Scenario: Used in compact Wi-Fi hotspot with built-in battery, accepting wireless charge in hotel rooms or airports equipped with public charging pads. IC Role / Device Role / Timing Role: System-level power manager - coordinates charging state, reports battery level via I²C, and triggers EOC signaling upon full charge. Use Value: Eliminates need for proprietary charging cables; 79% system efficiency minimizes heat buildup in sealed plastic enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-mode wireless power receiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| bq51221YFPT | Supports WPC v1.1 and PMA (not v1.2); identical pinout and package but lacks v1.2-specific packet handling and authentication enhancements. | Compatible with legacy WPC v1.1 transmitters only; cannot negotiate extended power profiles or enhanced security features defined in v1.2. | Select bq51221YFPT only if targeting cost-sensitive designs where v1.2 compliance is not required and existing v1.1 infrastructure dominates. |
| bq51021YFPT | WPC v1.1-only receiver; no PMA support; shares same DSBGA-42 package but omits COMM2, CLAMP2, LPRB2, and PMA-specific registers. | Limited to Qi-certified transmitters; cannot interoperate with PMA infrastructure such as Duracell or Starbucks charging stations. | Choose bq51021YFPT for single-standard deployments where PMA compatibility is unnecessary and BOM simplification is prioritized. |
Compared with bq51221YFPT and bq51021YFPT, the BQ51222YFPT provides broader ecosystem interoperability through WPC v1.2 and full PMA compliance, along with enhanced transient response via dynamic rectifier control - making it the only option for globally deployable dual-standard consumer electronics.
Availability
BQ51222YFPT is available at Aetrix Electronics and suitable for smartphone wireless charging, portable power bank integration, and tablet back-cover receiver modules requiring stable component supply across high-volume production cycles.
Supply support for BQ51222YFPT 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 company specializing in analog, embedded processing, and wireless power technologies, with decades of leadership in power management ICs and charging solutions.
The BQ51222YFPT belongs to TI's wireless power receiver product line, designed specifically to simplify dual-standard (WPC + PMA) implementation in space-constrained, thermally sensitive portable electronics.
FAQ
What wireless charging standards does the BQ51222YFPT support?
The BQ51222YFPT supports both WPC v1.2 Qi and Power Matters Alliance (PMA) standards in hardware - enabling automatic protocol detection and native communication without external firmware. It handles WPC's 2-kb/s bi-phase encoded packets and PMA's continuous symbol-based signaling (INC/DEC/EOC/RXID), allowing seamless interoperability with certified transmitters from either ecosystem.
How is output voltage configured on the BQ51222YFPT?
Output voltage on the BQ51222YFPT is set via an external resistor divider from OUT to the VO_REG pin, targeting 0.5013 V at VO_REG. This allows precise adjustment across 4.5–8.0 V - critical for optimizing coil coupling efficiency and matching downstream battery charger requirements. The same divider network connects to VIREG for PMA-mode rectifier voltage tracking, ensuring consistent regulation behavior across both standards.
Does the BQ51222YFPT require an external microcontroller?
No, the BQ51222YFPT operates autonomously for core wireless power functions - including protocol detection, rectification, regulation, and communication - without needing an external MCU. An I²C interface is provided for optional host control (e.g., reading RXID, configuring VO_REG, monitoring PD_DET/WPG), but all essential dual-mode operation is self-contained within the BQ51222YFPT silicon.
What is the purpose of the LPRB1 and LPRB2 pins on the BQ51222YFPT?
LPRB1 and LPRB2 on the BQ51222YFPT implement Low-Power Rectifier Boost functionality for PMA-mode operation - actively elevating the RECT voltage during light-load conditions (0–350 mA) to prevent input collapse during sudden load transients. Their behavior is controlled by the TERM resistor; when populated, they follow Table 2 logic; when omitted, they default to WPG and PD_DET functions for host status reporting.
How does thermal protection work in the BQ51222YFPT?
The BQ51222YFPT includes integrated thermal shutdown that activates at 155°C junction temperature, with 20°C hysteresis to prevent oscillation. This protection is independent of external sensors and responds directly to die temperature - safeguarding the IC during sustained overload, poor PCB thermal design, or ambient temperature extremes. Recovery occurs automatically once junction temperature falls below 135°C.
BQ51222YFPT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 42-XFBGA, DSBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Wireless Power Receiver
- Current - Supply:
- 20µA
- Voltage - Supply:
- 4V ~ 10V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 42-DSBGA
BQ51222YFPT FAQ
1.How can I place an order for BQ51222YFPT through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ51222YFPT 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 BQ51222YFPT reliable?
The price and inventory of BQ51222YFPT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ51222YFPT is usually 5 days.
3.What payment methods are accepted for BQ51222YFPT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ51222YFPT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ51222YFPT?
BQ51222YFPT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ51222YFPT 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 BQ51222YFPT?
For technical support, including BQ51222YFPT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ51222YFPT requirements.
6.How does Aetrix verify that BQ51222YFPT is sourced from the original manufacturer or authorized distributors?
All BQ51222YFPT 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 BQ51222YFPT meets industry standards.
7.What is the process for return or replacement of BQ51222YFPT?
All BQ51222YFPT units undergo pre-shipment inspection (PSI). If there is an issue with BQ51222YFPT, 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 BQ51222YFPT part is unused and in its original packaging.
Return procedure for BQ51222YFPT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BQ51222YFPT Tags
-
TPS2511DGNR
Texas Instruments
-
UTC2000/MG
Microchip Technology
-
TUSB320HAIRWBR
Texas Instruments
-
TPS61252DSGR
Texas Instruments
-
PI5USB30216CXUAEX
Diodes Incorporated
-
SN6501DBVR
Texas Instruments
-
CYPD3177-24LQXQT
Infineon Technologies
-
SN6501QDBVRQ1
Texas Instruments
-
STUSB1600AQTR
STMicroelectronics
-
SN6505BDBVR
Texas Instruments
-
SN6501DBVT
Texas Instruments
-
TPS65150PWPR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
