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Texas Instruments BQ25872YFFR
- Part No.:
- BQ25872YFFR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Chargers
- Package:
- 42-UFBGA, DSBGA
- Datasheet:
-
BQ25872YFFR.pdf
- Description:
- IC BATT CHG LI-ION 1CELL 42DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,758
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Product details
Overview
BQ25872YFFR from Texas Instruments is a 14-V, 7-A battery switch charger IC with integrated 10-bit ADC, designed for high-efficiency Li-ion battery charging in portable systems. It integrates dual MOSFETs (13-mΩ RDS(on)), four linear regulation loops (IBUS, IBAT, VBAT, VOUT), and programmable overvoltage/overcurrent protections - enabling safe, host-controlled fast charging in smartphones and tablets.
For engineers reviewing the BQ25872YFFR datasheet, BQ25872YFFR pinout, BQ25872YFFR application, or BQ25872YFFR equivalent, key selection considerations include its 7-A switching capability, integrated VBUS/VBAT/VOUT/VDROP/temperature sensing, I²C interface up to 1 MHz, DSBGA-42 (2.5 mm × 3.1 mm) package, and support for USB PD input voltage up to 14 V.
Technical Context
The BQ25872YFFR implements a synchronous battery switch architecture using two integrated N-channel MOSFETs (Q1 and Q2) with reverse current blocking, enabling bidirectional power path control between VBUS and battery. Its 10-bit ADC simultaneously measures six analog inputs: VBUS, VUSB, VOUT, VBAT, SRP–SRN (IBAT), and TS_BUS/TS_BAT (connector/battery temperature via NTC dividers).
Protection logic operates with configurable deglitch timers (e.g., 8 µs for VBUS_OVP, 64 µs for VDROP_OVP) and supports both immediate shutdown (e.g., OVP) and linear regulation response (e.g., IBUS_REG, VBAT_REG) within 1 ms. All thresholds - including VUSB_OVP (5.6–15.0 V range), VDROP_OVP (0–1000 mV), and IBAT_REG (0–6.35 A) - are programmable via I²C registers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Charge Current | 7 A continuous - enables fast charging of large-capacity Li-ion batteries in compact mobile devices. |
| MOSFET RDS(on) | 13 mΩ (typ) - minimizes conduction loss and thermal rise at full load, supporting >95% efficiency at 5 V/5 A. |
| ADC Resolution | 10-bit - provides sufficient granularity for precise monitoring of VBUS, VBAT, VOUT, VDROP, and temperature signals. |
| I²C Speed | Up to 1 MHz - allows rapid register access for real-time fault reporting and dynamic threshold adjustment during CC/CV charging. |
| Input Voltage Range | 3 V to 14 V on VBUS - accommodates USB Type-C PD sources and legacy 5 V/9 V/12 V adapters without external regulation. |
| Package | DSBGA-42 (YFF), 2.5 mm × 3.1 mm - ultra-compact footprint optimized for space-constrained smartphone PCB layouts. |
| Thermal Shutdown | 150 °C (rising), 120 °C (hysteresis) - protects silicon integrity under sustained overload or poor heatsinking conditions. |
Pinout & Package
Package: DSBGA-42 (YFF), 2.5 mm × 3.1 mm, 0.4 mm pitch, bottom-side ball array.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT (A3–G4) | Power output node | Drain of Q2; supplies regulated system power and battery charging current - must be routed with low-inductance, high-current traces. |
| PMID (A5–G5) | Internal mid-rail node | Drain of Q1 and source of Q2; tie all PMID pins together and leave floating - not for external connection. |
| VBUS (A6–G6) | Main input power rail | Accepts 2.8–6 V adapter input; powers internal circuitry and feeds battery switch - requires local 10-µF ceramic decoupling. |
| BATP / BATN | Battery voltage sense inputs | Differential sensing of battery pack voltage; series 100–1-kΩ resistors required per TI layout guidelines to limit ESD stress. |
| SRP / SRN | Battery current sense inputs | Measure IBAT across external RSENSE; supports ±0.2 V differential range - enables accurate charge/discharge current monitoring. |
| TS_BUS / TS_BAT | Temperature sense analog inputs | Interface with NTC thermistor dividers to monitor VBUS connector and battery pack temperature - critical for JEITA-compliant charging. |
| INT / CHGSTAT | Open-drain status outputs | INT asserts low on faults/events; CHGSTAT indicates battery switch enable state - both require 10-kΩ pull-up to system IOVDD. |
| SDA / SCL | I²C interface | Supports standard/fast/full-speed modes up to 1 MHz; requires 1-kΩ pull-up to 1.8 V or 3.3 V - enables host-based safety policy enforcement. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 7-A battery switch | Eliminates need for external MOSFETs and gate drivers - reduces BOM count and layout complexity in high-current power paths. |
| Programmable linear regulation loops | Four independent regulation modes (IBUS, IBAT, VBAT, VOUT) respond within 1 ms to maintain safe operating limits during transient events. |
| 10-bit multi-channel ADC | Measures VBUS, VUSB, VOUT, VBAT, VDROP, IBAT, IBUS, TS_BUS, TS_BAT - enables closed-loop thermal and safety monitoring without external sensors. |
| Fast OVP response (2 µs) | External OVP FET control via OVPGATE pin - protects against catastrophic overvoltage before internal circuitry is stressed. |
| Configurable protection thresholds | All OVP/OCP/OTP thresholds (e.g., VUSB_OVP: 5.6–15.0 V; IBAT_REG: 0–6.35 A) are software-programmable via I²C - supports flexible charging profiles. |
Applications
| Smartphone Fast Charging | Tablet Power Management |
|---|---|
|
Use Scenario: Dual-input (USB-C PD + legacy adapter) charging of 4.4 V nominal Li-ion battery with JEITA thermal compliance. IC Role / Device Role / Timing Role: Primary battery switch charger controlling power path, regulating charge current/voltage, and monitoring VBUS/VBAT/TS_BAT in real time. Use Value: Enables 7-A peak charging while maintaining <±12 mV VBAT accuracy and <±2% IBAT accuracy - critical for battery longevity and safety certification. |
Use Scenario: High-current system power delivery from USB-C PD source to both battery and SoC rails, with dynamic load sharing. IC Role / Device Role / Timing Role: Acts as intelligent power distributor managing VBUS-to-VOUT conversion, battery charging, and thermal throttling via I²C host coordination. Use Value: Integrated 10-bit ADC and 1-ms LDO response allow adaptive current limiting during CPU/GPU burst loads - prevents brownouts and overtemperature faults. |
| USB-C Portable Power Bank | Industrial Handheld Terminal |
|
Use Scenario: Bidirectional charging/discharging in a 2-cell Li-ion power bank supporting USB PD 3.0 sink/source negotiation. IC Role / Device Role / Timing Role: Battery switch controller with reverse current protection (RCP), VDROP monitoring, and VBUS OVP - ensures safe adapter-to-battery and battery-to-host power transfer. Use Value: 13-mΩ RDS(on) and programmable RCP thresholds (0.1–3.25 A) minimize voltage drop and enable precise current direction control. |
Use Scenario: Ruggedized field device requiring reliable battery charging under variable ambient temperatures (–40 °C to +85 °C) and mechanical shock. IC Role / Device Role / Timing Role: Robust battery management unit providing overvoltage, overcurrent, thermal, and short-circuit protection with fail-safe shutdown behavior. Use Value: 150 °C thermal shutdown with 30 °C hysteresis and 2-µs OVP response ensure operation integrity in uncontrolled environments without external supervision. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery switch charger applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ25870YFFR | Same DSBGA-42 package and 7-A capability, but lacks integrated VUSB OVP circuitry and OVPGATE pin - no external OVP FET control. | Suitable for designs where VUSB input is pre-regulated or OVP is handled upstream; not appropriate for direct USB-C PD 14-V input. | Select BQ25870YFFR only if VUSB OVP functionality is unnecessary and cost reduction is prioritized over input voltage flexibility. |
| BQ25873YFFR | Includes enhanced thermal regulation with die temperature ADC and improved VDROP accuracy (±10 mV vs ±10 mV at 200 mV), plus extended VBUS OVP range (up to 22 V absolute max). | Targeted at next-gen smartphones with higher-power adapters and tighter thermal budgets; supports wider input voltage tolerance. | Choose BQ25873YFFR when designing for USB PD 3.1 EPR (28 V) companion circuits or when die temperature monitoring is required for advanced thermal management. |
Compared with BQ25872YFFR, BQ25870YFFR omits critical VUSB OVP hardware, reducing system-level surge protection; BQ25873YFFR extends voltage headroom and thermal visibility but increases firmware complexity - BQ25872YFFR remains optimal for mainstream 14-V USB PD charging with balanced feature set and proven qualification.
Availability
BQ25872YFFR is available at Aetrix Electronics and suitable for smartphone fast charging, tablet power management, and industrial handheld terminal applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for BQ25872YFFR 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 solutions.
The BQ25872YFFR belongs to TI's bqSwitcher™ family of highly integrated battery switch chargers, engineered specifically for high-current, space-constrained mobile devices demanding precision monitoring, robust protection, and I²C configurability.
FAQ
What is the maximum supported input voltage for BQ25872YFFR?
The BQ25872YFFR supports an absolute maximum VBUS input of 22 V, but its recommended operating range is 2.8 V to 6 V. For VUSB input, the absolute maximum is 40 V, with a recommended range of 2.8 V to 14 V - enabling compatibility with USB PD 3.0 sources up to 14 V. Operation beyond 6 V on VBUS requires careful thermal design due to increased conduction loss in the integrated MOSFETs.
Does BQ25872YFFR support reverse current protection (RCP)?
Yes, BQ25872YFFR provides programmable reverse current protection with two selectable thresholds: 0.10–0.40 A (RCP_SET = '0') or 2.75–3.25 A (RCP_SET = '1'). This feature actively blocks current flow from VOUT back to VBUS during adapter removal or fault conditions, preventing battery discharge through the input path - a critical safety function in dual-power-source systems.
How does the integrated 10-bit ADC in BQ25872YFFR improve battery safety?
The BQ25872YFFR's 10-bit ADC continuously monitors VBUS, VBAT, VOUT, VDROP, IBAT, IBUS, TS_BUS, and TS_BAT with specified accuracies (e.g., ±12 mV on VBAT, ±2% on IBAT at 6 A). This enables real-time detection of abnormal voltage drops, overtemperature events, or current deviations - allowing the host processor to initiate corrective action (e.g., reduce charge current or halt charging) before thermal runaway or cell damage occurs.
What is the purpose of the PMID pin on BQ25872YFFR?
The PMID pin on BQ25872YFFR is an internal mid-rail node connecting the drain of Q1 and source of Q2 in the integrated battery switch. TI specifies that all PMID pins (A5–G5) must be tied together and left floating - they are not intended for external connection or decoupling. Improper routing or loading of PMID can disrupt switch timing and degrade efficiency or reliability.
Can BQ25872YFFR operate without I²C communication?
Yes, BQ25872YFFR can operate in default configuration without I²C: EN pin high enables basic charging with factory-default thresholds (e.g., VBAT_REG = 4.35 V, IBAT_REG = 3 A). However, full functionality - including VUSB_OVP programming, ADC data readout, fault masking, and linear regulation activation - requires I²C initialization. The INT pin remains active to signal faults even in default mode.
BQ25872YFFR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 42-UFBGA, DSBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Battery Chemistry:
- Lithium Ion/Polymer
- Number of Cells:
- 1
- Current - Charging:
- Constant
- Programmable Features:
- -
- Fault Protection:
- Over Current, Over Temperature, Over Voltage, Reverse Current
- Charge Current - Max:
- 7A
- Battery Pack Voltage:
- -
- Voltage - Supply (Max):
- 6V
- Interface:
- I2C
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 42-DSBGA (2.8x2.5)
BQ25872YFFR FAQ
1.How can I place an order for BQ25872YFFR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ25872YFFR 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 BQ25872YFFR reliable?
The price and inventory of BQ25872YFFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ25872YFFR is usually 5 days.
3.What payment methods are accepted for BQ25872YFFR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ25872YFFR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ25872YFFR?
BQ25872YFFR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ25872YFFR 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 BQ25872YFFR?
For technical support, including BQ25872YFFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ25872YFFR requirements.
6.How does Aetrix verify that BQ25872YFFR is sourced from the original manufacturer or authorized distributors?
All BQ25872YFFR 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 BQ25872YFFR meets industry standards.
7.What is the process for return or replacement of BQ25872YFFR?
All BQ25872YFFR units undergo pre-shipment inspection (PSI). If there is an issue with BQ25872YFFR, 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 BQ25872YFFR part is unused and in its original packaging.
Return procedure for BQ25872YFFR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BQ25872YFFR Tags
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BQ21040DBVR
Texas Instruments
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