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Texas Instruments BQ500211RGZT
- Part No.:
- BQ500211RGZT
- Manufacturer:
- Texas Instruments
- Category:
- Power Management - Specialized
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
BQ500211RGZT.pdf
- Description:
- IC WIRELESS PWR TX 48VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:184
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Product details
Overview
BQ500211RGZT from Texas Instruments is a Qi-compliant wireless power transmitter manager IC for 5-V WPC Type A5/A11 systems, integrating digital demodulation, dynamic power limiting (DPL), 12-bit ADC, PWM control outputs (DPWM-A/B), and comprehensive fault monitoring. It operates from –40°C to 110°C in a 48-pin QFN package and enables intelligent control of magnetic resonance-based power transfer to mobile phones and sealed devices.
For engineers reviewing the BQ500211RGZT datasheet, BQ500211RGZT pinout, BQ500211RGZT application, or BQ500211RGZT equivalent, key selection considerations include WPC 1.0.3 compliance, dual-mode (A5/A11) operation, DPL support for USB-limited sources, integrated digital demodulation eliminating external analog front-end components, and thermal shutdown via T_SENSE input with 1.0 V threshold.
Technical Context
The BQ500211RGZT implements a closed-loop WPC-compliant control architecture using frequency-shift regulation (112–205 kHz) to manage power delivery based on receiver-sent amplitude-modulated packets. Its internal digital demodulator processes COMM_A+/A−/B+/B− inputs to decode communication without external op-amps or comparators.
It features two independent PWM outputs (DPWM-A and DPWM-B) for phase-shifted full-bridge control, a dedicated LoPWR pin for dynamic power limiting mode selection, and an I²C-compatible PMB interface (PMB_CLK/PMB_DATA) for host configuration and status readback - all operating from separate 3.3-V analog (V33A) and digital (V33D) supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| WPC Compliance | WPC 1.0.3 compliant for Type A5 (magnetic positioning guide) and Type A11 (no guide) transmitters. |
| Operating Voltage | 3.0–3.6 V on both V33A (analog) and V33D (digital) supplies - supports stable operation from regulated 3.3-V rails. |
| Switching Frequency | 112–205 kHz - enables resonant power transfer at fixed 100-kHz tank frequency while regulating output via frequency detuning. |
| ADC Resolution | 12-bit - provides precise monitoring of V_SENSE, I_SENSE, T_SENSE, and LED_MODE for system diagnostics and safety. |
| Thermal Shutdown Threshold | 1.0 V on T_SENSE pin - triggers immediate shutdown when external NTC-based voltage divider drops below threshold. |
| Digital Demodulation Inputs | COMM_A+/A− and COMM_B+/B− - dual-channel differential inputs supporting robust packet decoding without external analog circuitry. |
| Package | 48-pin QFN (7 mm × 7 mm, RGZ) with exposed thermal pad - optimized for high-power density and thermal dissipation (θJC(bottom) = 1.4 °C/W). |
Pinout & Package
Package: 48-pin QFN (RGZ), 7 mm × 7 mm, exposed thermal pad (EPAD) requiring flood-fill GND plane and stitching vias.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DPWM_A / DPWM_B | PWM Output | Phase-shifted full-bridge gate drive signals; deadtime must be externally generated. |
| COMM_A+/A−, COMM_B+/B− | Digital Demodulation Input | Differential inputs for decoding WPC receiver communication packets; no external analog front-end required. |
| LoPWR (Pin 4) | Power Mode Control | Selects DPL mode (GND = 500 mA USB limit) or full-power mode (3.3 V); must be terminated to avoid erratic behavior. |
| T_SENSE (Pin 2) | Thermal/Fault Input | Shuts down device when voltage falls below 1.0 V - used with NTC voltage divider for overtemperature protection. |
| V_SENSE (Pin 46) | Voltage Monitoring Input | Measures transmitter input voltage via 76.8 kΩ/10 kΩ resistor divider to minimize quiescent current. |
| I_SENSE (Pin 42) | Current Monitoring Input | Accepts signal from 20 mΩ sense resistor + 50× gain amplifier for efficiency calculation and overcurrent detection. |
| LED_MODE (Pin 44) | LED Configuration Input | Resistor-programmed 4-mode LED indication (solid/blinking green/red) for charge status, fault, and DPL activity. |
| SLEEP (Pin 6) | Low-Power Mode Output | Drives low-power ping cycle during standby - reduces average system power consumption. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Digital Demodulation | Eliminates need for external op-amps, comparators, and filters - reduces BOM count and layout complexity for WPC packet decoding. |
| Dynamic Power Limiting (DPL) | Enables safe operation from 5-V/500-mA USB sources by automatically reducing output power when input voltage droops. |
| WPC Dual-Mode Support | Configurable as Type A5 (with magnetic guide) or Type A11 (no guide) transmitter - increases design flexibility across product lines. |
| Comprehensive Fault Monitoring | Detects coil misalignment, foreign object presence, overtemperature, overvoltage, and communication errors - asserts dedicated indicator outputs. |
| Trickle-Charge Ready | Responds to WPC Charge Status (CS100) packets to maintain top-off charging after reported 100% battery level - extends runtime without EPT interruption. |
Applications
| Mobile Phone Charging Pads | Industrial Hermetic Tool Chargers |
|---|---|
|
Use Scenario: Wireless charging surface for smartphones placed without precise alignment. IC Role / Device Role / Timing Role: Transmitter manager that pings for receivers, decodes WPC packets, regulates power via frequency shift, and drives status LEDs. Use Value: Enables Qi-certified charging with automatic device detection, real-time power negotiation, and visual feedback for user confirmation. |
Use Scenario: Sealed handheld tools used in hazardous environments where connectors are prohibited. IC Role / Device Role / Timing Role: Primary controller for fully encapsulated wireless power transfer - handles communication, thermal shutdown, and fault isolation. Use Value: Eliminates mechanical wear and ingress points while maintaining WPC interoperability and safety-critical fault response. |
| Automotive Console Charging Surfaces | Tabletop Multi-Device Charging Stations |
|
Use Scenario: Integrated charging pad in vehicle center console powering multiple devices simultaneously. IC Role / Device Role / Timing Role: Transmitter managing power delivery under varying input conditions (e.g., 12-V automotive supply with 5-V LDO). Use Value: Supports Dynamic Power Limiting to prevent brownout during engine cranking or accessory load surges. |
Use Scenario: Flat-panel charging station supporting phones, earbuds, and smartwatches on shared surface. IC Role / Device Role / Timing Role: Central WPC transmitter coordinating multi-receiver handshaking and prioritizing power allocation. Use Value: Delivers consistent 5-W output per device with independent LED indication and fault containment per charging zone. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar wireless power transmitter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| bq500210RGZR | First-generation TI wireless transmitter manager; lacks DPL, uses analog demodulation, and supports only A5 mode. | Lower-cost solution for fixed-position A5-only applications without USB power constraints. | Choose bq500210RGZR only if DPL, A11 mode, and digital demodulation are not required. |
| bq51013BRGER | Receiver-side IC with integrated rectifier and battery charger; not a transmitter - functionally complementary, not substitutable. | Used on device side to receive and condition power; requires pairing with a transmitter like BQ500211RGZT. | bq51013BRGER is not a drop-in alternative - it serves the opposite side of the WPC link and cannot replace BQ500211RGZT. |
Compared with bq500210RGZR, BQ500211RGZT adds DPL, dual-mode WPC support, and digital demodulation - enabling USB-powered designs and broader receiver compatibility. Unlike bq51013BRGER, it is a transmitter-only IC and cannot perform rectification or battery charging.
Availability
BQ500211RGZT is available at Aetrix Electronics and suitable for mobile phone charging pads, industrial hermetic tool chargers, and automotive console charging surfaces requiring stable component supply and long-term lifecycle support.
Supply support for BQ500211RGZT 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 technologies, with leadership in power management and interface solutions.
The BQ500211RGZT belongs to TI's Wireless Power Transmitter family, designed specifically to simplify Qi-compliant transmitter implementation with integrated control, communication, and protection functions for consumer and industrial charging systems.
FAQ
Is BQ500211RGZT still recommended for new designs?
No - the official TI datasheet (SLUSAO2, June 2012) explicitly states "Not Recommended For New Designs." While BQ500211RGZT remains available for legacy support and existing production, TI recommends evaluating newer alternatives such as the BQ51222 or BQ51013 series for new projects requiring updated features, enhanced efficiency, or extended lifecycle assurance. BQ500211RGZT continues to be supported for repair and maintenance of deployed systems.
What is the function of the LoPWR pin on BQ500211RGZT?
The LoPWR pin (Pin 4) selects Dynamic Power Limiting mode on BQ500211RGZT: pulling it to GND configures the device for 500-mA USB-limited operation, while pulling it to 3.3 V enables full-power mode. This pin must always be terminated - leaving it floating causes erratic behavior. The setting directly affects how BQ500211RGZT responds to input voltage droop during power transfer.
Can BQ500211RGZT operate without an external microcontroller?
Yes - BQ500211RGZT is a fully autonomous wireless power transmitter manager. It performs all WPC-compliant functions internally: device detection, packet decoding, frequency regulation, fault handling, and LED/buzzer indication. An external MCU is optional and only needed for advanced customization via the PMB interface (PMB_CLK/PMB_DATA); default operation requires no host processor.
How does BQ500211RGZT handle thermal protection?
BQ500211RGZT monitors temperature via the T_SENSE pin (Pin 2), which triggers immediate shutdown when voltage drops below 1.0 V. This is typically implemented using an NTC thermistor in a voltage divider. If unused, T_SENSE must be pulled above 1.0 V (e.g., to 3.3 V) to prevent false shutdown. Recovery occurs after ~5 minutes or upon receiver removal.
What are the key differences between BQ500211RGZT and bq500210RGZR?
BQ500211RGZT improves upon bq500210RGZR with three major upgrades: (1) integrated digital demodulation (replacing analog front-end), (2) Dynamic Power Limiting for USB-limited sources, and (3) dual-mode WPC support (A5 and A11). These enable smaller PCB area, safer operation from constrained supplies, and broader receiver compatibility - making BQ500211RGZT more flexible despite its "Not Recommended" status for new designs.
BQ500211RGZT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 48-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Applications:
- Wireless Power Transmitter
- Current - Supply:
- 52mA
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 110°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-VQFN (7x7)
BQ500211RGZT FAQ
1.How can I place an order for BQ500211RGZT through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ500211RGZT 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 BQ500211RGZT reliable?
The price and inventory of BQ500211RGZT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ500211RGZT is usually 5 days.
3.What payment methods are accepted for BQ500211RGZT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ500211RGZT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ500211RGZT?
BQ500211RGZT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ500211RGZT 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 BQ500211RGZT?
For technical support, including BQ500211RGZT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ500211RGZT requirements.
6.How does Aetrix verify that BQ500211RGZT is sourced from the original manufacturer or authorized distributors?
All BQ500211RGZT 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 BQ500211RGZT meets industry standards.
7.What is the process for return or replacement of BQ500211RGZT?
All BQ500211RGZT units undergo pre-shipment inspection (PSI). If there is an issue with BQ500211RGZT, 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 BQ500211RGZT part is unused and in its original packaging.
Return procedure for BQ500211RGZT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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