BQ25895
I²C Battery Charger · NVDC Power Path · 5A Max Charge · USB OTG Boost · QFN-24 (4×4mm) · Texas Instruments
| Part Number | BQ25895 |
|---|---|
| Manufacturer | Texas Instruments |
| Device Type | I²C Battery Charger with Power Path Management |
| Input Voltage Range | 3.9 V – 14 V |
| Maximum Charge Current | 5 A (programmable via I²C) |
| Battery Support | 1S–3S Li-Ion / Li-Polymer |
| Power Path | NVDC (Narrow VDC) with battery supplement mode |
| USB OTG Boost | 5.1 V / 2.4 A (boost mode, programmable) |
| Peak Efficiency | 93% (buck charging mode) |
| Thermal Regulation | JEITA compliant, programmable thermal limits |
| Package | QFN-24 (4×4mm) |
| Operating Temperature | −40°C to +85°C |
| Input Operating Voltage (VBUS) | 3.9 V – 14 V |
|---|---|
| Maximum Input Current Limit | 3.25 A (adjustable via I²C) |
| Charge Voltage Accuracy | ±0.5% (typical) |
| Charge Current Accuracy | ±5% (typical at 3 A) |
| Battery Discharge Current (Supplement) | Up to 6 A (short-duration peak) |
| Quiescent Current (Battery Only) | < 15 µA (ship mode) |
| OTG Output Voltage | 5.1 V ±2% (configurable via I²C) |
| OTG Maximum Output Current | 2.4 A |
| Switching Frequency | 1.5 MHz (typical) |
| Input Over-Voltage Protection | 14.5 V (typical threshold) |
| Control Interface | I²C (up to 400 kHz Fast-mode) |
|---|---|
| I²C Address | 0x6A or 0x6B (selectable via AD pin) |
| Status Outputs | STAT, PG (Power Good), INT interrupt pin |
| ADC Monitoring | 10-bit ADC for VBUS, VBAT, ICHG, TS |
| Protection Features | Input OVP, battery OVP, thermal shutdown, trickle charge |
| Charge Profile | Trickle → Pre-charge → CC → CV → Termination |
| JEITA Compliance | Hot/Cold NTC thresholds configurable via I²C registers |
| Battery Supplement | Automatic system power maintained when input sags |
| Watchdog Timer | 40-second I²C watchdog with disable option |
| Part Number | BQ25895 |
|---|---|
| Orderable Qty | 1 pcs – 10,000+ pcs |
| Price (1–9 pcs) | Contact for quote |
| Price (10–99 pcs) | Contact for quote |
| Price (100–499 pcs) | Contact for quote |
| Price (500+ pcs) | Best pricing available |
| Lead Time (stock) | 3–7 business days |
| Packaging | Tape & Reel (T&R) |
| RoHS Compliant | Yes (Pb-free) |
Please confirm exact parameters with manufacturer datasheet.
The BQ25895 from Texas Instruments is a highly integrated I²C-controlled 5 A battery charger featuring NVDC Power Path management. Designed for single-cell to three-cell Li-Ion and Li-Polymer battery packs, this IC delivers up to 93% charging efficiency in a compact QFN-24 (4×4mm) package. The Power Path architecture enables the system to operate directly from the input source while simultaneously charging the battery — critical for drone applications where uninterrupted flight controller power is essential.
A standout feature of the BQ25895 is its USB On-The-Go (OTG) boost mode, capable of delivering 5.1 V at up to 2.4 A from the battery to power external accessories such as companion computers (Raspberry Pi, Jetson Nano) or USB peripherals. Combined with the battery supplement mode, the BQ25895 ensures that the system voltage never drops below a safe threshold — even during transient input power loss or high-current burst demands from drone motors.
Safety and thermal management are integral to the BQ25895 design. It incorporates JEITA-compliant thermal regulation using an external NTC thermistor, input over-voltage protection, battery over-voltage protection, and a programmable thermal shutdown threshold. The on-chip 10-bit ADC enables real-time monitoring of bus voltage, battery voltage, charge current, and thermistor temperature via I²C — providing telemetry data directly to the drone flight controller.
For UAV system integration, the BQ25895 excels in multi-cell battery management scenarios. Its 3.9–14 V input range accommodates solar panel inputs, automotive DC sources, and standard USB-C PD adapters, making it suitable for field-deployable drone charging stations. The ship mode feature reduces quiescent current below 15 µA, preserving battery charge during long-term storage or transport — an important consideration for military and survey drone operators managing multiple battery packs.
Key Features
- 5 A maximum charge current with I²C programmability — supports fast-charging drone packs
- NVDC Power Path with battery supplement mode — seamless input-to-battery switchover
- USB OTG boost output: 5.1 V / 2.4 A — powers companion computers and accessories
- 93% peak efficiency in buck charging mode — minimizes thermal dissipation
- JEITA thermal regulation with configurable NTC thresholds — safe operation over −40°C to +85°C
- 10-bit ADC for real-time monitoring of VBUS, VBAT, ICHG, and TS via I²C
- 1S–3S Li-Ion/Li-Po battery support — flexible pack configurations
- Compact QFN-24 (4×4mm) package — ideal for space-constrained drone power boards
Need BQ25895 for Your Drone Power System?
Get competitive pricing and fast delivery from UAVCHIP. Stock available for immediate shipment worldwide.
The BQ25895 is an active-production Texas Instruments part with stable global availability through authorized distribution channels. As of this listing, UAVCHIP holds ready inventory with 3–7 business day lead time for most order quantities. For volume procurement exceeding 1,000 pcs, we recommend contacting our sourcing team directly for the most current allocation and pricing. The QFN-24 (4×4mm) package requires careful PCB thermal design — consult TI Application Note SLVA828 for layout guidelines. We also stock complementary components including the INA226 current monitor, TPS5430 buck converter, and STM32F405RGT6 flight controller MCU for complete BOM solutions.