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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Battery Chargers

Texas Instruments BQ25618EYFFR

Name: BQ25618EYFFR
Brand: Texas Instruments
SKU: BQ25618EYFFR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BQ25618EYFFR

Manufacturer:: Texas Instruments

Category:: Battery Chargers

Package:: 30-UFBGA, DSBGA

Datasheet:: BQ25618EYFFR.pdf

Description:: I2C CONTROLLED 1.5-A SINGLE CELL

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Product details

Overview

BQ25618EYFFR from Texas Instruments is a highly integrated I²C-controlled 1-cell Li-ion/Li-polymer switch-mode battery charger delivering 1.5A fast charge current, ±0.5% charge voltage regulation (10mV step), and 20mA±10mA termination current. It features NVDC power path management for system instant-on with depleted batteries and supports USB, high-voltage adapter, or wireless input sources in earbuds charging cases and compact wearables.

For engineers reviewing the BQ25618EYFFR datasheet, BQ25618EYFFR pinout, BQ25618EYFFR application, or BQ25618EYFFR equivalent, this page delivers verified technical context, validated pin functions, confirmed JEITA-compliant thermal regulation, exact WCSP-30 package mapping, and two field-validated alternative parts with documented functional trade-offs.

Technical Context

The BQ25618EYFFR implements a synchronous buck converter operating at 1.32–1.68MHz with integrated RBFET, HSFET, LSFET, and BATFET-enabling full power-path control without external MOSFETs. Its NVDC architecture maintains SYS ≥3.5V even with zero battery voltage, while VINDPM dynamically tracks battery voltage to maximize input power harvesting.

I²C registers configure JEITA temperature thresholds (VT1–VT5), charge voltage (3.5–4.52V in 10mV steps), input current limit (100mA–3.2A), and top-off timer. Thermal regulation activates at 110°C, and ship mode reduces battery leakage to 7µA via BATFET disable controlled by QON pin timing.

Key Specifications

Parameter	Value and Actual Design Meaning
Charge Current	1.5A max fast charge; enables full battery recharge in <90 minutes for 300mAh TWS case batteries.
Termination Current	20mA ±10mA; ensures precise end-of-charge detection for high-capacity wearables without overcharge risk.
Voltage Regulation	±0.5% accuracy at 4.2V/4.35V/4.45V; guarantees safe, consistent cell voltage across temperature and aging.
Input Voltage Range	4V–13.5V with 22V absolute max; supports USB-C PD, 9V wall adapters, and 12V wireless RX without external protection.
Quiescent Current	7µA in Ship Mode; extends shelf life of sealed consumer devices to >12 months before first use.
Switching Frequency	1.5MHz nominal; allows use of 2.5×2.0×1.0mm³ inductor for ultra-thin PCB layouts in space-constrained earbud cases.
BATFET R_DS(on)	19.5mΩ typical; minimizes discharge loss during system operation, extending runtime by ~3% vs. 30mΩ alternatives.
Thermal Shutdown	150°C rising threshold; protects IC during sustained high-current charging in thermally isolated enclosures.

Pinout & Package

The BQ25618EYFFR uses a 30-ball DSBGA (WCSP) package measuring 2.0mm × 2.4mm body size with 2.20mm × 2.60mm overall footprint. Thermal pad is grounded for electrical reference and heat dissipation.

Pin/Terminal	Circuit Role	Design Meaning
BAT (C1,D1,E1,F1)	Battery positive connection	Direct connection point for Li-ion anode; internal current sense resistor between BAT and SYS enables accurate charge/discharge monitoring.
BATSNS (F3)	Battery voltage sensing	Remote sense input for charge voltage regulation; must be routed directly to battery terminal to eliminate trace IR drop errors.
QON (D4)	BATFET enable/reset control	Logic-low pulse (>8s) triggers full system reset; logic-low pulse (t_SHIPMODE) exits 7µA ship mode without host intervention.
SCL/SDA (F5/E4)	I²C serial interface	Configures JEITA profile, V_INDPM, I_INDPM, and safety timers; supports standard-mode (100kHz) and fast-mode (400kHz) operation.
TS (D3)	NTC thermistor input	Analog input for battery temperature qualification; voltage thresholds (e.g., VT1=73.3% of REGN) define JEITA cold/hot zones for charge suspension.
VBUS (A4,B4)	Input power source	Accepts 4–13.5V; internal 22V-rated RBFET provides reverse-blocking and UVLO/OVP protection without external components.
SYS (C2,D2,E2,F2)	System power rail output	NVDC output regulated slightly above battery voltage but never below 3.5V; powers MCU/display even with 0V battery.
INT/STAT (F4/E5)	Status interrupt outputs	Open-drain signals: INT pulses on fault events; STAT blinks at 1Hz during suspend, stays HIGH at full charge.

Key Features

Feature	Design Value
I²C-programmable JEITA profile	Enables full compliance with battery manufacturer thermal charging requirements using five configurable voltage thresholds per temperature zone.
Narrow Voltage DC (NVDC) power path	Eliminates need for separate system boost converter; delivers instant-on behavior and seamless transition between adapter/battery power.
Integrated power FETs (RBFET/HSFET/LSFET/BATFET)	Reduces BOM count by 4 MOSFETs and associated gate drivers; simplifies layout and improves reliability in miniaturized designs.
20mA low-accuracy termination current	Extends usable capacity of small Li-ion cells (e.g., 100–300mAh) by avoiding premature cutoff common with 100mA+ termination in legacy chargers.
Ship Mode with 7µA battery leakage	Supports factory-sealed packaging for consumer electronics; eliminates need for mechanical battery disconnect switches or shipping jumpers.
VINDPM tracking battery voltage	Maintains maximum input power delivery across battery SOC; prevents input collapse when V_BAT rises during charging.

Applications

Earbuds Charging Case	Smartwatch Power Management
Use Scenario: Recharges dual 100mAh Li-ion cells in compact TWS case with USB-C or Qi wireless input. IC Role / Device Role / Timing Role: Primary battery charger and system power arbiter; manages simultaneous charging and system load via NVDC path. Use Value: 1.5A charge current achieves full recharge in <75 minutes; 20mA termination ensures 99.2% capacity utilization per cycle.	Use Scenario: Powers display, sensors, and BLE radio from single 300mAh cell while supporting fast overnight charging. IC Role / Device Role / Timing Role: Dual-role power manager: charges battery at up to 1.5A and regulates SYS rail to 3.65V minimum during active use. Use Value: 7µA ship mode extends unopened shelf life to 14 months; integrated BATFET eliminates external load switch for system reset.
Wireless Headphone Case	Hearing Aid Charger
Use Scenario: Charges four 50mAh cells in foldable headphone case using 9V wall adapter with minimal thermal rise. IC Role / Device Role / Timing Role: High-efficiency buck charger with thermal regulation; throttles charge current above 110°C to prevent enclosure overheating. Use Value: 94.5% efficiency at 1A reduces heat generation by 32% vs. linear charger; 1.5MHz switching enables 2.0×2.4mm WCSP footprint.	Use Scenario: Enables medical-grade charging of sealed 45mAh Li-ion cells in hearing aid docking station with strict thermal limits. IC Role / Device Role / Timing Role: JEITA-compliant charger with five-zone NTC monitoring; suspends charge outside 0–45°C per ISO 13485 requirements. Use Value: VT1–VT5 thresholds programmable to match 103AT-2 thermistor curve; ±7.5% input current regulation ensures stable adapter sourcing.

Earbuds Charging Case

Smartwatch Power Management

Use Scenario: Recharges dual 100mAh Li-ion cells in compact TWS case with USB-C or Qi wireless input.

IC Role / Device Role / Timing Role: Primary battery charger and system power arbiter; manages simultaneous charging and system load via NVDC path.

Use Value: 1.5A charge current achieves full recharge in <75 minutes; 20mA termination ensures 99.2% capacity utilization per cycle.

Use Scenario: Powers display, sensors, and BLE radio from single 300mAh cell while supporting fast overnight charging.

IC Role / Device Role / Timing Role: Dual-role power manager: charges battery at up to 1.5A and regulates SYS rail to 3.65V minimum during active use.

Use Value: 7µA ship mode extends unopened shelf life to 14 months; integrated BATFET eliminates external load switch for system reset.

Wireless Headphone Case

Hearing Aid Charger

Use Scenario: Charges four 50mAh cells in foldable headphone case using 9V wall adapter with minimal thermal rise.

IC Role / Device Role / Timing Role: High-efficiency buck charger with thermal regulation; throttles charge current above 110°C to prevent enclosure overheating.

Use Value: 94.5% efficiency at 1A reduces heat generation by 32% vs. linear charger; 1.5MHz switching enables 2.0×2.4mm WCSP footprint.

Use Scenario: Enables medical-grade charging of sealed 45mAh Li-ion cells in hearing aid docking station with strict thermal limits.

IC Role / Device Role / Timing Role: JEITA-compliant charger with five-zone NTC monitoring; suspends charge outside 0–45°C per ISO 13485 requirements.

Use Value: VT1–VT5 thresholds programmable to match 103AT-2 thermistor curve; ±7.5% input current regulation ensures stable adapter sourcing.

Equivalent & Alternatives

The following parts are listed as comparable options for similar single-cell Li-ion charging applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BQ25619ERTWR	4mm×4mm WQFN-24 package; higher R_DS(on) (19.5mΩ BATFET vs. 26mΩ); includes PG pin; 35.6°C/W θ_JA.	Preferred for designs needing power-good indication or easier hand-soldering; less suitable for <2.5mm height constraints.	Select BQ25619ERTWR when board space permits larger package and PG signal is required for host power sequencing.
MP2662GQ-Z	Monolithic 1.5A charger with 1.2MHz switching; no JEITA support; fixed 4.2V charge voltage; 25µA ship mode current.	Targeted at cost-sensitive wearables without thermal charging requirements; lacks I²C configurability and remote sensing.	Choose MP2662GQ-Z only for non-JEITA applications where 18µA higher ship mode leakage is acceptable and fixed V_REG suffices.

Compared with BQ25618EYFFR, BQ25619ERTWR offers identical functionality in a larger, more manufacturable package with added PG signaling, while MP2662GQ-Z sacrifices configurability and ultra-low leakage for lower unit cost in thermally tolerant designs.

Availability

BQ25618EYFFR is available at Aetrix Electronics and suitable for earbuds charging cases, smartwatches, and hearing aid docking stations requiring stable component supply, long-term lifecycle support, and guaranteed WCSP-30 package availability.

Supply support for BQ25618EYFFR 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 and embedded processing technologies, with decades of expertise in battery management ICs for portable electronics.

The BQ25618EYFFR belongs to TI's BQ256xx family of highly integrated single-cell chargers designed specifically for space-constrained, battery-powered wearables and true wireless audio products.

FAQ

What is the maximum supported input voltage for the BQ25618EYFFR?

The BQ25618EYFFR supports an input voltage range of 4V to 13.5V, with an absolute maximum rating of 22V on VBUS and VAC pins. This allows direct compatibility with USB-C PD sources, 9V wall adapters, and 12V wireless power receivers without external overvoltage protection circuitry. The device implements programmable VINDPM regulation up to 5.4V and automatically tracks battery voltage to maintain optimal input power transfer.

How does the BQ25618EYFFR achieve 7µA ship mode current?

The BQ25618EYFFR achieves 7µA ship mode current by disabling the BATFET via the QON pin control sequence and powering down internal regulators-including REGN and the I²C interface-while maintaining only essential bias circuits. This ultra-low leakage state is verified across temperature and ensures >12 months shelf life for sealed consumer devices. The BQ25618EYFFR datasheet specifies ISHIP_BAT = 7µA typical at VBAT = 4.5V and TJ < 85°C.

Can the BQ25618EYFFR support JEITA-compliant charging without external components?

Yes, the BQ25618EYFFR supports full JEITA-compliant charging using only an external NTC thermistor (e.g., 103AT-2) connected to the TS pin and two resistors forming a voltage divider from REGN to GND. All five JEITA temperature zones (cold, cool, normal, warm, hot) are configured via I²C registers VT1–VT5, with thresholds expressed as percentages of REGN voltage. No external comparators, op-amps, or microcontroller intervention are required.

What package type and dimensions does the BQ25618EYFFR use?

The BQ25618EYFFR uses a 30-ball DSBGA (WCSP) package with a 2.0mm × 2.4mm body size and 2.20mm × 2.60mm overall footprint including solder balls. It is designated YFF in TI's packaging nomenclature and requires microvia-in-pad PCB design with 100µm diameter vias and ENIG surface finish for reliable assembly. Thermal pad must be connected to solid ground plane.

Does the BQ25618EYFFR integrate all power FETs needed for charging?

Yes, the BQ25618EYFFR integrates four power FETs: an input reverse-blocking FET (RBFET), high-side switching FET (HSFET), low-side switching FET (LSFET), and battery FET (BATFET). It also includes the bootstrap diode for high-side gate drive. This full integration eliminates the need for seven external discrete MOSFETs and associated gate drivers typically required in discrete buck charger designs, reducing solution size by >40%.

BQ25618EYFFR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: -

Package/Case:: 30-UFBGA, DSBGA

Packaging:: Tape & Reel (TR)

Product Status:: Active

Battery Chemistry:: Lithium Ion/Polymer

Number of Cells:: 1

Current - Charging:: Constant - Programmable

Programmable Features:: Current, Timer

Fault Protection:: Over Current, Over Temperature, Over Voltage

Charge Current - Max:: 1.5A

Battery Pack Voltage:: 4.52V

Voltage - Supply (Max):: 13.5V

Interface:: I2C

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 30-DSBGA

BQ25618EYFFR FAQ

1.How can I place an order for BQ25618EYFFR through Aetrix?

Please submit a Request for Quotation (RFQ) for BQ25618EYFFR 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 BQ25618EYFFR reliable?

The price and inventory of BQ25618EYFFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ25618EYFFR is usually 5 days.

3.What payment methods are accepted for BQ25618EYFFR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ25618EYFFR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BQ25618EYFFR?

BQ25618EYFFR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BQ25618EYFFR 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 BQ25618EYFFR?

For technical support, including BQ25618EYFFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ25618EYFFR requirements.

6.How does Aetrix verify that BQ25618EYFFR is sourced from the original manufacturer or authorized distributors?

All BQ25618EYFFR 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 BQ25618EYFFR meets industry standards.

7.What is the process for return or replacement of BQ25618EYFFR?

All BQ25618EYFFR units undergo pre-shipment inspection (PSI). If there is an issue with BQ25618EYFFR, 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 BQ25618EYFFR part is unused and in its original packaging.

Return procedure for BQ25618EYFFR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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