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Texas Instruments BQ24780SRUYT
- Part No.:
- BQ24780SRUYT
- Manufacturer:
- Texas Instruments
- Category:
- Battery Chargers
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
BQ24780SRUYT.pdf
- Description:
- IC BAT CHG MULTCHEM 1-4CL 28WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:287
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Product details
Overview
BQ24780SRUYT from Texas Instruments is a 1- to 4-cell hybrid power boost mode battery charge controller IC designed for Intel CPU turbo-mode systems. It enables simultaneous adapter + battery power delivery, supports 4.5–24 V input, delivers ±0.4% charge voltage accuracy (16-mV step), ±2% input/charge/discharge current regulation, and integrates dual N-FET drivers for ACFET/RBFET/BATFET control in notebook power architectures.
For engineers reviewing the BQ24780SRUYT datasheet, BQ24780SRUYT pinout, BQ24780SRUYT application, or BQ24780SRUYT equivalent, key selection criteria include hybrid boost transient response (150 µs), SMBus-programmable PROCHOT/PMON/IDCHG monitoring, 600–1000 kHz switching frequency selection, and integrated loop compensation for Li+-based portable computing power management.
Technical Context
The BQ24780SRUYT implements a synchronous buck-boost hybrid power architecture with two independent charge pumps driving N-channel MOSFETs (ACFET, RBFET, BATFET) for automatic AC/battery source selection. Its PROCHOT profile monitors IADP, IDCHG, and PMON to trigger CPU throttling within defined thermal/power limits.
It operates in three configurable PWM frequencies (600/800/1000 kHz), uses SRP/SRN and ACP/ACN differential sense inputs for high-accuracy current measurement, and embeds safety comparators for OVP (24–28 V ACOV), OCP (cycle-by-cycle CHG_OCP at 54–130 mV), and thermal shutdown (155 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 24 V - supports universal AC adapter inputs and wide-range system rail operation |
| Cell Support | 1S–4S Li+ - enables flexible battery pack design across ultrabooks, tablets, and detachables |
| Charge Voltage Accuracy | ±0.4% - ensures precise cell voltage regulation (e.g., ±67 mV at 16.8 V) for battery longevity |
| Input Current Regulation | ±2% - maintains stable adapter sourcing under dynamic load without brownout or overcurrent faults |
| PROCHOT Monitoring | ±2% IADP / ±5% PMON - provides host microcontroller with accurate real-time power telemetry for CPU throttling |
| Switching Frequency | 600 / 800 / 1000 kHz - selectable via SMBus register REG0x12[9:8] to optimize efficiency vs. EMI vs. component size |
| Quiescent Current (Adapter Standby) | 0.65 mA - meets Energy Star requirements for low-power idle states |
Pinout & Package
Package: 28-pin WQFN (RUY), 4.00 × 4.00 mm² body size with exposed PowerPAD™ thermal pad soldered to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ACN / ACP | Adapter current sense differential input | Measures input current with 20× or 40× programmable gain; enables DPM (dynamic power management) |
| SRP / SRN | Battery charge/discharge current sense differential input | Supports bidirectional sensing: V(SRP–SRN) for charge, V(SRN–SRP) for discharge; feeds CHG_OCP and IDCHG |
| ACDRV / CMSRC | N-FET gate driver output & charge pump source | Drives ACFET and RBFET gates with 6 V above CMSRC; includes internal diode and inrush limiting via external resistor |
| BATDRV / BATSRC | Battery FET gate driver output & source reference | Drives BATFET with 6 V above BATSRC; enables system power sourcing from battery during boost mode |
| IADP / IDCHG / PMON | Analog monitor outputs | Buffered, SMBus-scalable outputs for adapter current (IADP), battery discharge current (IDCHG), and total system power (PMON) |
| PROCHOT / TB_STAT | Open-drain status indicators | PROCHOT asserts active-low when power/thermal thresholds exceeded; TB_STAT pulls low only during hybrid boost mode |
| SCL / SDA | SMBus interface | Two-wire serial bus for full configuration of charge parameters, safety thresholds, and monitoring gains |
Key Features
| Feature | Design Value |
|---|---|
| Hybrid Power Boost Mode | Enables battery-assisted system power delivery during CPU turbo bursts; prevents adapter collapse with 150 µs mode entry |
| Integrated Dual Charge Pumps | Eliminates need for external gate drivers; independently controls ACFET/RBFET and BATFET with 6 V gate overdrive |
| Realtime ILIM Pin Control | Hardware-based current limit override via analog voltage on ILIM pin - faster than SMBus updates for critical transients |
| Battery LEARN Function | Automated calibration sequence that identifies battery presence, capacity, and health before enabling charging |
| Enhanced Safety Monitoring | Dedicated comparators for ACOV (24–28 V), CHG_OCP (54–130 mV), TSHUT (155 °C), and BAT_DEPL (56–78% of VREG) |
Applications
| Notebook & Ultrabook Power Management | Tablet & Detachable System Power |
|---|---|
|
Use Scenario: Intel Core processor turbo boost demands exceed adapter capability during sustained workloads. IC Role / Device Role / Timing Role: BQ24780SRUYT dynamically blends adapter and battery power, regulates charge/discharge currents, and signals PROCHOT to throttle CPU. Use Value: Prevents system crash or thermal throttling by delivering up to 4S battery energy into system rail without adapter overload. |
Use Scenario: Thin-profile tablet requires compact, high-efficiency charging with intelligent power path control. IC Role / Device Role / Timing Role: BQ24780SRUYT manages 1S–4S Li+ charging, monitors PMON for runtime estimation, and enables fast AC/battery source handoff. Use Value: Achieves >90% peak efficiency and <0.65 mA adapter standby current while supporting USB-C PD-compatible input ranges. |
| Industrial Handheld Terminal | Medical Portable Equipment |
|
Use Scenario: Rugged handheld with hot-swappable battery must maintain uninterrupted operation during battery replacement. IC Role / Device Role / Timing Role: BQ24780SRUYT detects BATPRES state change, disables charging within 100 µs, and sustains system power via ACFET/RBFET sequencing. Use Value: Enables seamless battery swap without system reset or data loss using hardware-level BATPRES-triggered state machine. |
Use Scenario: Battery-powered medical device requires precise charge termination, safety-critical fault reporting, and low-noise power delivery. IC Role / Device Role / Timing Role: BQ24780SRUYT enforces ±0.4% voltage accuracy, monitors CHG_OCP/CHG_UCP/BAT_LOWV, and asserts PROCHOT on any safety violation. Use Value: Meets IEC 62304 Class C software safety requirements through hardware-monitored overvoltage, overcurrent, and depletion protection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar hybrid battery charge controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ24780SRUYR | Same die, tape-and-reel packaging variant (3000 pcs/reel vs. 250 pcs/tray); identical electrical specs and pinout | No functional difference; selected for high-volume automated assembly | Choose BQ24780SRUYR for SMT production lines requiring reel-fed placement; BQ24780SRUYT preferred for prototyping and low-volume builds |
| BQ24773RUYT | Lacks hybrid boost mode; no TB_STAT or PROCHOT generation; supports only single-source (AC or battery) power path | Targeted at cost-sensitive applications without CPU turbo burst requirements | Select BQ24773RUYT where hybrid power delivery is unnecessary and SMBus-controlled basic charging suffices |
Compared with BQ24780SRUYT, BQ24780SRUYR offers identical functionality in alternate packaging for volume manufacturing, while BQ24773RUYT removes hybrid boost and PROCHOT features-making it unsuitable for Intel turbo-mode systems but viable for simpler portable devices.
Availability
BQ24780SRUYT is available at Aetrix Electronics and suitable for notebook, tablet, and industrial handheld applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for BQ24780SRUYT 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 power management ICs with decades of battery charging expertise.
The BQ24780SRUYT belongs to TI's bq247xx hybrid power controller family, engineered specifically for Intel-platform portable computing systems needing coordinated AC/battery power delivery and precise CPU thermal management.
FAQ
What is the primary function of the BQ24780SRUYT in a notebook system?
The BQ24780SRUYT serves as a hybrid power boost mode battery charge controller that enables simultaneous power delivery from both AC adapter and battery to the system rail during CPU turbo bursts. It regulates charge/discharge currents, monitors IADP/IDCHG/PMON for host throttling, and manages N-FET power path selection - all critical for maintaining stable operation in Intel-based ultrabooks and detachables.
Does the BQ24780SRUYT support 1-cell lithium-ion battery configurations?
Yes, the BQ24780SRUYT supports 1S–4S Li+ battery packs. Its charge voltage regulation range spans 4.192 V to 19.2 V, and its SRP/SRN current sense inputs operate down to 1-cell configurations with full accuracy and safety monitoring including BAT_LOWV (2.3–2.8 V threshold) and BAT_DEPL (56–78% of regulation voltage).
How does the BQ24780SRUYT implement PROCHOT signaling for CPU thermal management?
The BQ24780SRUYT generates an active-low open-drain PROCHOT signal based on programmable thresholds for adapter current (IADP), battery discharge current (IDCHG), and system power (PMON). When any monitored parameter exceeds its configured limit, the IC asserts PROCHOT for ≥10 ms to trigger host-initiated CPU throttling - ensuring thermal and power integrity without firmware intervention.
Can the BQ24780SRUYT operate without SMBus communication?
Yes, the BQ24780SRUYT can operate in default configuration without SMBus: charge voltage, current limits, and safety thresholds are set by internal registers at power-up. However, full functionality - including PROCHOT profile tuning, IADP/IDCHG/PMON gain selection, switching frequency choice, and LEARN mode activation - requires SMBus access via SDA/SCL pins.
What package type and thermal characteristics does the BQ24780SRUYT use?
The BQ24780SRUYT uses a 28-pin WQFN (RUY) package measuring 4.00 × 4.00 mm² with an exposed PowerPAD™ thermal pad. Its junction-to-board thermal resistance (RθJB) is 6.5 °C/W, and junction-to-ambient (RθJA) is 33.3 °C/W - enabling reliable operation up to 125 °C junction temperature in compact, thermally constrained designs.
BQ24780SRUYT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 28-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Battery Chemistry:
- Multi-Chemistry
- Number of Cells:
- 1 ~ 4
- Current - Charging:
- -
- Programmable Features:
- -
- Fault Protection:
- Over Current, Over Voltage, Short Circuit
- Charge Current - Max:
- -
- Battery Pack Voltage:
- -
- Voltage - Supply (Max):
- 24V
- Interface:
- SMBus
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-WQFN (4x4)
BQ24780SRUYT FAQ
1.How can I place an order for BQ24780SRUYT through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ24780SRUYT 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 BQ24780SRUYT reliable?
The price and inventory of BQ24780SRUYT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ24780SRUYT is usually 5 days.
3.What payment methods are accepted for BQ24780SRUYT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ24780SRUYT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ24780SRUYT?
BQ24780SRUYT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ24780SRUYT 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 BQ24780SRUYT?
For technical support, including BQ24780SRUYT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ24780SRUYT requirements.
6.How does Aetrix verify that BQ24780SRUYT is sourced from the original manufacturer or authorized distributors?
All BQ24780SRUYT 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 BQ24780SRUYT meets industry standards.
7.What is the process for return or replacement of BQ24780SRUYT?
All BQ24780SRUYT units undergo pre-shipment inspection (PSI). If there is an issue with BQ24780SRUYT, 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 BQ24780SRUYT part is unused and in its original packaging.
Return procedure for BQ24780SRUYT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BQ24780SRUYT Tags
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Texas Instruments
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