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Texas Instruments BQ25620RYKR
- Part No.:
- BQ25620RYKR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Chargers
- Package:
- 18-PowerWFQFN
- Datasheet:
-
BQ25620RYKR.pdf
- Description:
- IC CONTROLLED 1-CELL 3.5-A BUCK
- Quantity:
- Payment:
- Shipping:
Inventory:1,778
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Product details
Overview
BQ25620RYKR from Texas Instruments is an I²C-controlled, 3.5A synchronous buck battery charger for single-cell Li-ion/Li-polymer batteries, featuring NVDC power path management, USB OTG boost (up to 9.6V), 3.9–18V input range, ±0.5% charge voltage accuracy, and 15mΩ BATFET. It enables instant-on system operation with depleted batteries in portable medical devices and IP cameras.
For engineers reviewing the BQ25620RYKR datasheet, BQ25620RYKR pinout, BQ25620RYKR application, or BQ25620RYKR equivalent, key selection considerations include its 18-pin WQFN package, JEITA-compliant thermal regulation, ship-mode leakage of 0.15μA, integrated 12-bit ADC, and autonomous charging capability without host intervention.
Technical Context
The BQ25620RYKR implements narrow VDC (NVDC) power path architecture that regulates SYS voltage just above battery voltage-never dropping below a programmable minimum (2.56–3.84V)-ensuring system operation even with zero-battery or no-battery conditions. Its integrated power FETs (RBFET, HSFET, LSFET, BATFET) eliminate external MOSFETs and enable full power-path control.
It supports dual-mode operation: fully autonomous charging (trickle → pre-charge → CC → CV) with temperature-based termination, or I²C-configurable real-time control of charge voltage (3.5–4.8V, 10mV steps), current (80–3520mA, 80mA steps), and input regulation (VINDPM/IINDPM). Thermal regulation activates at 60°C or 120°C per register setting, with hard thermal shutdown at 140°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Charge Current | Up to 3.5 A - supports fast charging of 2000–5000 mAh single-cell batteries in under 2 hours with high efficiency. |
| Input Voltage Range | 3.9 V to 18 V - compatible with USB PD, 5V/9V/12V wall adapters, and industrial 12–15V supplies without external regulators. |
| Charge Voltage Accuracy | ±0.5 % - ensures precise cell voltage control critical for Li-ion longevity and safety compliance (IEC 62368-1). |
| BATFET RDS(on) | 15 mΩ typical - minimizes conduction loss during battery discharge and enables efficient power-path supplement mode. |
| Ship Mode Current | 0.15 μA - extends shelf life of battery-powered devices stored for >1 year without significant capacity loss. |
| I²C Interface | Standard-mode (100 kHz) and fast-mode (400 kHz) - allows dynamic reconfiguration of charge profiles and fault monitoring in runtime. |
| ADC Resolution | 12-bit - provides accurate real-time measurement of battery voltage, input current, and thermistor-based temperature for JEITA zone control. |
Pinout & Package
Package: 18-pin WQFN (RYK), 2.5 mm × 3.0 mm, 0.4 mm pitch, exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VBUS | Input Power Supply | Accepts 3.9–18 V input; internal reverse-blocking FET prevents battery backfeed into source. |
| BAT | Battery Terminal | Direct connection to Li-ion anode; integrates 15 mΩ BATFET for low-loss charge/discharge switching. |
| SYS | System Power Rail | Delivers regulated output to system load; maintains voltage above battery via NVDC path, enabling instant-on. |
| SW | Switching Node | Connects to external 0.68–2.2 µH inductor; high-frequency (1.5 MHz) buck switching node with bootstrap drive support. |
| BTST | Bootstrap Capacitor Supply | Drives high-side FET gate; requires 47 nF ceramic capacitor between BTST and SW for reliable HSFET turn-on. |
| REGN | Internal LDO Output | 3.3 V regulated supply for internal circuitry and TS thermistor bias; requires 4.7 µF local decoupling. |
| TS | Temperature Sense Input | Analog input for NTC thermistor; enables JEITA-compliant charging with four configurable thermal zones. |
| SCL / SDA | I²C Interface | Standard bidirectional bus interface; supports configuration, telemetry readback, and fault reporting. |
| QON | System Reset / Ship Exit | Active-low control: forces exit from ship mode or initiates full system reset when VBUS is absent. |
| STAT / INT / PG | Status Outputs | Open-drain indicators: STAT (charging status), INT (fault/status interrupt), PG (input power good). |
Key Features
| Feature | Design Value |
|---|---|
| NVDC Power Path Management | Regulates SYS voltage dynamically above battery voltage while enforcing 2.56–3.84 V minimum-enables system boot with dead battery and seamless battery supplement under heavy load. |
| USB OTG Boost Mode | Configurable 3.84–9.6 V output with >90% efficiency at 100 mA; supports up to 2.4 A output current for peripheral powering without external boost IC. |
| Autonomous Charging Engine | Fully self-managed 4-phase charging (trickle/pre-CC/CV) with voltage-based recharge threshold and programmable termination current (10–620 mA, 10 mA steps). |
| Ultra-Low Quiescent Current | 1.5 μA in battery-only mode and 0.15 μA in ship mode-preserves battery energy during storage or standby without external enable logic. |
| Integrated Safety Protections | Hardware-enforced safeguards: input/battery overvoltage, thermal regulation (60/120°C), thermal shutdown (140°C), battery overcurrent (6 A), and charging safety timer. |
Applications
| Portable Medical Equipment | IP Camera Systems |
|---|---|
Use Scenario: Battery-backed handheld ultrasound or glucose monitor requiring FDA-grade reliability and multi-year shelf life. IC Role / Device Role: Primary battery charge manager with JEITA thermal profiling, ship-mode preservation, and NVDC-enabled instant wake-up from deep sleep. Use Value: 0.15 μA ship-mode current extends uncharged shelf life beyond 12 months; ±0.5% voltage accuracy meets medical battery certification requirements. |
Use Scenario: Outdoor PTZ IP camera powered by solar + Li-ion, operating across –20°C to 60°C ambient. IC Role / Device Role: Adaptive charger with automatic D+/D− USB detection, wide-input (3.9–18 V) support, and cold/hot zone suspension per JEITA. Use Value: VINDPM tracking adjusts input voltage limit to match battery voltage-maximizing harvest from variable solar input without overloading source. |
| Tablet Computing Devices | Gaming & Computer Accessories |
Use Scenario: 7–10 inch Android tablet with 4000–6000 mAh battery, supporting USB-C PD input and always-on display. IC Role / Device Role: System power arbiter with NVDC path, OTG boost for peripheral accessories, and 12-bit ADC for real-time battery health monitoring. Use Value: SYS rail remains stable during battery swap or depletion-eliminates forced reboot; OTG mode powers USB keyboards/mice directly from battery. |
Use Scenario: Wireless gaming headset or VR controller with rapid-charge requirement and compact PCB area budget. IC Role / Device Role: High-efficiency (≥90% at 25 mA) buck charger with minimal external components (no external FETs) and ultra-thin 0.4 mm pitch WQFN package. Use Value: 2.5 × 3.0 mm footprint saves >30% board space vs. discrete solutions; 1.5 MHz switching enables use of sub-1 µH inductors for height-constrained designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery charge management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ25622RYKR | Same pinout and core functionality, but adds ILIM pin for analog input current limit setting and TS_BIAS pin for dedicated thermistor bias-lacks D+/D− detection. | Preferred where precise external current limiting or independent thermistor biasing is required; unsuitable for USB host-port auto-detection. | Select BQ25622RYKR if design uses non-USB sources or requires flexible analog IIN programming; retain BQ25620RYKR for legacy USB adapter compatibility. |
| BQ25616YFFR | Standalone (no I²C), 3.5 A, 4–13.5 V input, fixed 4.1/4.2/4.35 V charge voltage, no ADC, no OTG, 24-pin QFN (4×4 mm). | Targeted at cost-sensitive, fixed-profile applications without telemetry or dynamic control needs. | Choose BQ25616YFFR only for simple, low-BOM-count chargers where I²C configurability, OTG, and thermal telemetry are unnecessary. |
Compared with BQ25622RYKR, the BQ25620RYKR offers native D+/D− USB detection but lacks analog ILIM control; versus BQ25616YFFR, it trades standalone simplicity for full I²C flexibility, integrated ADC, and OTG capability-making it optimal for feature-rich, firmware-upgradable portable systems.
Availability
BQ25620RYKR is available at Aetrix Electronics and suitable for portable medical equipment, IP camera systems, tablet computing devices, and gaming accessories requiring stable component supply, long-term lifecycle support, and automotive-grade reliability validation.
Supply support for BQ25620RYKR 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 technologies, with decades of expertise in battery charging ICs and industrial-grade reliability.
The BQ25620RYKR belongs to TI's BQ256xx family of highly integrated switch-mode battery chargers designed for space-constrained, high-efficiency portable electronics requiring autonomous operation, USB compatibility, and robust safety certification.
FAQ
What is the maximum input voltage supported by the BQ25620RYKR?
The BQ25620RYKR supports an absolute maximum input voltage of 26 V on VBUS, with recommended continuous operation from 3.9 V to 18 V. This wide range accommodates USB PD, 12 V industrial rails, and high-voltage adapters while maintaining regulation via VINDPM tracking-ensuring safe, efficient charging across diverse power sources without external protection circuitry.
Does the BQ25620RYKR require an external microcontroller to operate?
No-the BQ25620RYKR operates autonomously with no host required: it detects battery state, executes full 4-phase charging (trickle → pre-charge → CC → CV), terminates based on current/voltage thresholds, and enforces JEITA thermal zones using only internal logic and the TS thermistor. I²C is optional for advanced configuration, telemetry, or dynamic profile updates.
How does the NVDC power path in the BQ25620RYKR improve system reliability?
The BQ25620RYKR's NVDC architecture maintains SYS voltage slightly above battery voltage-never falling below a programmable 2.56–3.84 V floor-so the system powers on instantly even with a fully depleted or missing battery. During peak load, it seamlessly supplements from the battery without collapsing SYS, preventing brownouts and enabling graceful power transitions critical for medical and security applications.
What is the ship mode current specification for the BQ25620RYKR?
The BQ25620RYKR achieves 0.15 μA typical battery leakage current in ship mode-verified across temperature and process corners. This ultra-low quiescent draw extends shelf life of battery-powered products to over 12 months without significant capacity loss, meeting stringent requirements for consumer electronics, medical disposables, and IoT edge sensors awaiting deployment.
Can the BQ25620RYKR support USB On-The-Go (OTG) functionality?
Yes-the BQ25620RYKR integrates a synchronous boost converter supporting 3.84–9.6 V output with >90% efficiency down to 100 mA and up to 2.4 A peak current. It automatically engages OTG mode when VBUS is absent and battery voltage exceeds 2.9 V, enabling direct peripheral powering (e.g., USB flash drives, keyboards) without additional ICs or layout complexity.
BQ25620RYKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 18-PowerWFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Battery Chemistry:
- Lithium Ion/Polymer
- Number of Cells:
- 1
- Current - Charging:
- Constant - Programmable
- Programmable Features:
- Current, Timer, Voltage
- Fault Protection:
- Over Current, Over Temperature, Over-Under Voltage, Short Circuit
- Charge Current - Max:
- 3.5A
- Battery Pack Voltage:
- 4.8V (Max)
- Voltage - Supply (Max):
- 18V
- Interface:
- I2C
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 18-WQFN-HR (3x2.5)
BQ25620RYKR FAQ
1.How can I place an order for BQ25620RYKR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ25620RYKR 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 BQ25620RYKR reliable?
The price and inventory of BQ25620RYKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ25620RYKR is usually 5 days.
3.What payment methods are accepted for BQ25620RYKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ25620RYKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ25620RYKR?
BQ25620RYKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ25620RYKR 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 BQ25620RYKR?
For technical support, including BQ25620RYKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ25620RYKR requirements.
6.How does Aetrix verify that BQ25620RYKR is sourced from the original manufacturer or authorized distributors?
All BQ25620RYKR 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 BQ25620RYKR meets industry standards.
7.What is the process for return or replacement of BQ25620RYKR?
All BQ25620RYKR units undergo pre-shipment inspection (PSI). If there is an issue with BQ25620RYKR, 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 BQ25620RYKR part is unused and in its original packaging.
Return procedure for BQ25620RYKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BQ25620RYKR Tags
-
BQ21040DBVR
Texas Instruments
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