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Texas Instruments BQ24773RUYT
- Part No.:
- BQ24773RUYT
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
BQ24773RUYT.pdf
- Description:
- IC BATT MFUNC MULTI-CHEM 28WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,907
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Product details
Overview
BQ24773RUYT from Texas Instruments is an I²C-controlled, synchronous NVDC (Narrow Voltage DC) battery charge controller for 1S–4S Li-ion/Li-polymer batteries, supporting 4.5–24 V input, ±0.5% charge voltage accuracy, and integrated system power monitoring (PMON), adapter/battery current sensing (IADP/IBAT), and PROCHOT output for CPU thermal throttling in ultrabooks and tablets.
For engineers reviewing the BQ24773RUYT datasheet, BQ24773RUYT pinout, BQ24773RUYT application, or BQ24773RUYT equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative parts with functional distinctions, and supply-ready availability details - all grounded in TI's SLUSC03C production datasheet.
Technical Context
The BQ24773RUYT implements a host-controlled, synchronous buck-boost NVDC architecture with independent ACFET/RBFET gate drivers (ACDRV/CMSRC), P-channel BATFET control (BATDRV), and high-side/low-side MOSFET drivers (HIDRV/LODRV/PHASE/BTST) to manage power path between adapter, battery, and system rail. It supports programmable switching frequency (600 kHz–1.2 MHz) and ultra-fast DPM response (<100 µs).
It integrates precision analog monitors: 40×/80× selectable IADP gain for adapter current, 20×/8×/16× IBAT gain for battery charge/discharge current, and configurable PMON gain (0.25 µA/W or 1 µA/W) for total system power. All outputs are clamped to ≤3.3 V and support SMBus/I²C register-based configuration including PROCHOT profile, min/max system voltage, and charge parameters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 24 V - supports wide-input AC adapters and industrial power supplies without external pre-regulation. |
| Charge Voltage Accuracy | ±0.5% at 16.8 V - enables precise cell-level regulation critical for 4S Li-ion packs and long-term battery health. |
| Input Current Regulation Accuracy | ±2% at 4.096 A - ensures stable adapter current limiting during high-power charging and prevents wall-adapter overload. |
| IADP/IBAT/PMON Output Clamping | ≤3.3 V - allows direct interfacing with 3.3 V microcontrollers and ADCs without level-shifting. |
| Quiescent Current (Adapter Standby) | 650–815 µA - meets Energy Star and ErP Lot 6 low-power requirements during system sleep with adapter connected. |
| Switching Frequency Range | 600 kHz to 1.2 MHz - enables compact magnetics and noise filtering while balancing efficiency and EMI. |
| PROCHOT Pulse Width | ≥10 ms - guarantees reliable CPU throttle activation during thermal or overcurrent events. |
Pinout & Package
Package: 28-pin WQFN (RUY), 4.0 mm × 4.0 mm, 0.4 mm pitch, thermally enhanced exposed pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ACN / ACP | Differential input for adapter current sense resistor | Enables high-accuracy input current monitoring (IADP) with 40×/80× gain; common-mode range 4.5–24 V supports full input range. |
| SRN / SRP | Differential input for battery charge/discharge current sense resistor | Supports bidirectional current sensing: 20× gain for charge, 8×/16× for discharge - essential for NVDC supplement mode and gas gauge integration. |
| BATDRV | P-channel BATFET gate driver output | Drives external P-FET to regulate SYS voltage down to minimum system voltage (programmable 1.024–19.2 V) even with dead battery. |
| ACDRV / CMSRC | N-channel ACFET/RBFET charge pump driver | Provides 6 V gate drive above CMSRC to fully enhance external N-FETs; CMSRC grounding converts ACDRV to logic-level output for discrete FET control. |
| HIDRV / LODRV / PHASE / BTST | Synchronous buck-boost regulator gate drivers | Enables high-efficiency DC-DC conversion: HIDRV drives high-side N-FET, LODRV drives low-side N-FET, BTST supplies bootstrap voltage for HIDRV. |
| IADP / IBAT / PMON | Analog monitor outputs | Voltage outputs proportional to adapter current (IADP), battery current (IBAT), and total system power (PMON); all clamped to ≤3.3 V for MCU compatibility. |
| PROCHOT | Open-drain processor hot indicator | Asserts active-low signal to CPU when adapter overcurrent, battery discharge overcurrent, or system undervoltage occurs - triggers immediate thermal throttling. |
| SDA / SCL | I²C interface pins | Supports standard-mode (100 kHz) and fast-mode (400 kHz) I²C communication; address 0xD4H; enables full register access for dynamic charge parameter updates. |
Key Features
| Feature | Design Value |
|---|---|
| Host-controlled NVDC power path | Enables system instant-on with no battery or deeply discharged battery, and supplement mode where battery augments adapter current during peak loads. |
| Ultra-fast input current DPM | Responds to adapter current limit violations in <100 µs - prevents brownouts and maintains stable system operation under dynamic load changes. |
| High-accuracy system power monitor (PMON) | Configurable gain (0.25 or 1 µA/W) with ±5–6% accuracy across 19.5 V/65 W and 11 V/44 W conditions - enables precise CPU power budgeting and thermal management. |
| Programmable PROCHOT profile | Customizable trigger thresholds for IADP, IBAT, and SYS voltage - allows OEM-specific thermal and power safety policies without hardware changes. |
| Integrated NMOS ACFET/RBFET and PMOS BATFET drivers | Eliminates need for external gate drivers and reduces BOM count; supports both discrete FETs and integrated power stages in space-constrained designs. |
Applications
| Ultrabook Power Management | Tablet PC Battery System |
|---|---|
|
Use Scenario: Dual-input (adapter + battery) power delivery with seamless transition, system voltage regulation, and CPU thermal coordination in thin-and-light notebooks. IC Role / Device Role / Timing Role: Primary NVDC charge controller managing power path, battery charging, adapter current limiting, and PROCHOT signaling to Intel CPU. Use Value: Enables instant-on boot from dead battery, extends runtime via supplement mode, and prevents thermal throttling-induced performance loss through accurate PMON and PROCHOT. |
Use Scenario: Compact, high-efficiency battery charging and system power monitoring in detachable Windows tablets with 3S/4S Li-ion packs. IC Role / Device Role / Timing Role: Synchronous buck-boost charge controller with integrated current/power sensing and I²C-configurable charge profiles. Use Value: Reduces component count vs. discrete solutions; ±0.5% charge voltage accuracy preserves battery cycle life; 650 µA quiescent current extends standby time. |
| Industrial Handheld Terminal | Medical Portable Monitor |
|
Use Scenario: Ruggedized handheld with hot-swappable battery, wide-input adapter (12–24 V), and real-time power telemetry for battery health reporting. IC Role / Device Role / Timing Role: Host-managed charge controller providing IADP/IBAT/PMON analog outputs for embedded MCU-based power analytics and fault logging. Use Value: 40×/80× IADP gain and 20× IBAT gain enable high-resolution current measurement with standard 12-bit ADCs; I²C interface allows runtime calibration updates. |
Use Scenario: Battery-powered medical device requiring fail-safe power management, precise charge termination, and low-noise operation near sensitive analog circuitry. IC Role / Device Role / Timing Role: Safety-critical NVDC controller with OVP/OCP/FET short protection, regulated SYS rail, and clamped analog outputs (≤3.3 V) to prevent MCU latch-up. Use Value: Integrated safety comparators (ACOV, ACOC, SYSOVP) eliminate external protection ICs; 100 pF max load on IADP/IBAT/PMON ensures stability with medical-grade filtering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NVDC battery charge controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ24770RUYT | SMBus interface (address 0x12H), default 800 kHz switching frequency, default 3.2 A input current limit | Requires SMBus host controller; lower default switching frequency may ease EMI filtering but limits power density | Select for legacy SMBus platforms or where lower switching frequency simplifies layout and EMI compliance. |
| BQ24780SRUYT | I²C interface (0xD4H), integrated 5-V/1-A buck converter for auxiliary rail, same pinout and register map as BQ24773RUYT | Provides dedicated 5 V system rail for USB, display, or sensors - eliminates need for separate buck IC in multi-rail systems | Select when auxiliary 5 V supply is required and board space is constrained; drop-in compatible with BQ24773RUYT firmware. |
Compared with BQ24773RUYT, BQ24770RUYT requires SMBus infrastructure and offers lower default switching frequency, while BQ24780SRUYT adds an integrated 5 V buck converter - making it ideal for systems needing auxiliary power without increasing BOM count or PCB area.
Availability
BQ24773RUYT is available at Aetrix Electronics and suitable for ultrabook power management, tablet PC battery systems, and industrial handheld terminals requiring stable component supply, long-term lifecycle support, and traceable sourcing for production programs.
Supply support for BQ24773RUYT 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 delivering analog, embedded processing, and power management solutions with deep expertise in battery management and power conversion.
The BQ24773RUYT belongs to TI's bq2477x NVDC charge controller product line, designed specifically for space-constrained, high-efficiency multi-cell Li-ion charging in portable computing and industrial mobile equipment with host-controlled power path and thermal coordination.
FAQ
What communication interface does the BQ24773RUYT use?
The BQ24773RUYT uses a standard I²C interface with fixed slave address 0xD4H (11010100b), supporting standard-mode (100 kHz) and fast-mode (400 kHz) operation. Unlike the SMBus-based BQ24770RUYT, the BQ24773RUYT does not require SMBus-specific timing or alert protocols, simplifying host integration in microcontroller-based systems.
How does the BQ24773RUYT support system instant-on with a dead battery?
The BQ24773RUYT enables system instant-on by regulating the SYS rail directly from the adapter input while simultaneously charging the battery. Its NVDC architecture maintains SYS voltage at the programmed minimum (1.024–19.2 V) even when the battery is absent or deeply discharged, allowing the host system to power up immediately without waiting for battery recharge.
What is the function of the PMON pin on the BQ24773RUYT?
The PMON pin on the BQ24773RUYT provides an analog voltage output proportional to total system power drawn from both adapter and battery sources. With selectable gain (0.25 µA/W or 1 µA/W), it delivers ±5–6% accuracy across typical operating points and is clamped to ≤3.3 V - enabling direct connection to a microcontroller's ADC for real-time power budgeting and thermal management.
Does the BQ24773RUYT integrate MOSFET drivers for the power stage?
Yes, the BQ24773RUYT integrates full gate drivers for both the synchronous buck-boost power stage (HIDRV, LODRV, PHASE, BTST) and external FETs (ACDRV/CMSRC for N-channel ACFET/RBFET; BATDRV for P-channel BATFET). This eliminates the need for external drivers and reduces solution size, particularly in ultrabook and tablet reference designs.
What protection features are built into the BQ24773RUYT?
The BQ24773RUYT includes comprehensive hardware-based protection: input overvoltage (ACOV, 24–28 V trip), input overcurrent (ACOC), battery overvoltage (SYSOVP, configurable per cell count), FET short detection, and thermal shutdown. These operate independently of firmware, ensuring fail-safe operation even during host communication failure or software hang.
BQ24773RUYT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 28-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Multi-Function Controller
- Battery Chemistry:
- Multi-Chemistry
- Number of Cells:
- -
- Fault Protection:
- -
- Interface:
- I2C
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-WQFN (4x4)
BQ24773RUYT FAQ
1.How can I place an order for BQ24773RUYT through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ24773RUYT 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 BQ24773RUYT reliable?
The price and inventory of BQ24773RUYT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ24773RUYT is usually 5 days.
3.What payment methods are accepted for BQ24773RUYT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ24773RUYT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ24773RUYT?
BQ24773RUYT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ24773RUYT 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 BQ24773RUYT?
For technical support, including BQ24773RUYT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ24773RUYT requirements.
6.How does Aetrix verify that BQ24773RUYT is sourced from the original manufacturer or authorized distributors?
All BQ24773RUYT 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 BQ24773RUYT meets industry standards.
7.What is the process for return or replacement of BQ24773RUYT?
All BQ24773RUYT units undergo pre-shipment inspection (PSI). If there is an issue with BQ24773RUYT, 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 BQ24773RUYT part is unused and in its original packaging.
Return procedure for BQ24773RUYT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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