BQ25895RTWRG4
I2C Controlled Single Cell 5-A Fast Charger with MaxChargeTM for High Input Voltage and Adjustable Voltage 3.1-A Boost OperationThe BQ25895RTWRG4 is a i2c controlled single cell 5-a fast charger with maxchargetm for high input voltage and adjustable voltage 3.1-a boost operation from Texas Instruments. View the full BQ25895RTWRG4 datasheet below including electrical characteristics, absolute maximum ratings.
Manufacturer
Texas Instruments
Category
LEDsOverview
Part: BQ25895, Texas Instruments
Type: Single Cell Li-Ion/Li-Polymer Battery Charger with Boost Converter
Description: The BQ25895 is a highly-integrated 5-A switch-mode battery charge management and system power path management device for single cell Li-Ion and Li-polymer batteries, supporting high input voltage fast charging and boost mode operation with adjustable output from 4.5 V to 5.5 V at up to 3.1 A.
Operating Conditions:
- Supply voltage: 3.9–14 V
- Operating junction temperature: -40 to +125 °C
- Max charge current: 5 A
- Max boost output current: 3.1 A
Absolute Maximum Ratings:
- Max VBUS voltage: 16 V
- Max junction temperature: +150 °C
- Max storage temperature: +150 °C
Key Specs:
- Charge efficiency: 93% at 2 A, 91% at 3 A charge current
- Boost efficiency: 93% at 5 V at 1 A output
- Charge voltage regulation: ±0.5%
- Charge current regulation: ±5%
- Input current regulation: ±7.5%
- Battery discharge MOSFET resistance: 11 mΩ
- Low battery leakage current: 12 μA
- Input current limit range: 100 mA to 3.25 A (with 50-mA resolution)
Features:
- High efficiency 5-A, 1.5-MHz switch mode buck charge
- Boost Mode operation with adjustable output from 4.5 V to 5.5 V, up to 3.1-A output
- Single input to support USB and adjustable high voltage adapters (3.9-V to 14-V input)
- Flexible autonomous and I2C Mode for optimal system performance
- Integrated ADC for system monitor (voltage, temperature, charge current)
- Narrow VDC (NVDC) power path management
Applications:
- Power bank, mobile Wi-Fi hotspot
- Wireless Bluetooth speaker
- Portable internet devices
Package:
- WQFN (24) 4.00mm x 4.00mm
Features
- High efficiency 5-A, 1.5-MHz switch mode buck charge
- -93% Charge efficiency at 2 A and 91% charge efficiency at 3 A charge current
- -Optimize for high voltage input (9 V to 12 V)
- -Low Power PFM Mode for light load operations
- Boost Mode operation with adjustable output from 4.5 V to 5.5 V
- -Selectable 500-KHz to 1.5-MHz boost converter with up to 3.1-A output
- -93% Boost efficiency at 5 V at 1 A output
- Integrated control to switch between charge and Boost Mode
- Single input to support USB input and adjustable high voltage adapters
- -Support 3.9-V to 14-V input voltage range
- -Input current limit (100 mA to 3.25 A with 50-mA resolution) to support USB2.0, USB3.0 standard and high voltage adapters
- -Maximum power tracking by input voltage limit up-to 14V for wide range of adapters
- -Auto detect USB SDP, CDP, DCP, and Nonstandard Adapters
- Input current optimizer (ICO) to maximize input power without overloading adapters
- Resistance compensation (IRCOMP) from charger output to cell terminal
- Highest battery discharge efficiency with 11-mΩ battery discharge MOSFET up to 9 A
- Integrated ADC for system monitor (voltage, temperature, charge current)
- Narrow VDC (NVDC) power path management
- -Instant-on works with no battery or deeply discharged battery
- -Ideal diode operation in Battery Supplement Mode
- BATFET Control to support Ship Mode, wake up, and full system reset
- Flexible autonomous and I 2 C Mode for optimal system performance
- High integration includes all MOSFETs, current sensing and loop compensation
- 12-μA Low battery leakage current to support Ship Mode
- High accuracy
- -±0.5% Charge voltage regulation
- -±5% Charge current regulation
- -±7.5% Input current regulation
- Safety
- -Battery temperature sensing for charge and Boost Mode
- -Thermal regulation and thermal shutdown
Applications
- Power bank, mobile Wi-Fi hotspot
- Wireless Bluetooth speaker
- Portable internet devices
Pin Configuration
Figure 6-1. BQ25895 RTW (WQFN) Top View
Table 6-1. Pin Functions
| PIN | PIN | TYPE (1) | DESCRIPTION |
|---|---|---|---|
| NAME | NO. | TYPE (1) | DESCRIPTION |
| VBUS | 1 | P | Charger Input Voltage. The internal n-channel reverse block MOSFET (RBFET) is connected between VBUS and PMID with VBUS on source. Place a 1-μF ceramic capacitor from VBUS to PGND and place it as close as possible to IC. |
| D+ | 2 | AIO | Positive line of the USB data line pair. D+/D- based USB host/charging port detection. The detection includes data contact detection (DCD), primary and secondary detection in BC1.2, and Adjustable high voltage adapter (MaxCharge). |
| D- | 3 | AIO | Negative line of the USB data line pair. D+/D- based USB host/charging port detection. The detection includes data contact detection (DCD), primary and secondary detection in BC1.2, and Adjustable high voltage adapter (MaxCharge). |
| STAT | 4 | DO | Open drain charge status output to indicate various charger operation. Connect to the pull up rail via 10-kΩ resistor. LOW indicates charge in progress. HIGH indicates charge complete or charge disabled. When any fault condition occurs, STAT pin blinks in 1 Hz. The STAT pin function can be disabled when STAT_DIS bit is set. |
| SCL | 5 | DI | I 2 C Interface clock. Connect SCL to the logic rail through a 10-kΩ resistor. |
| SDA | DIO | I 2 C Interface data. Connect SDA to the logic rail through a 10-kΩ resistor. | |
| INT | 7 | DO | Open-drain Interrupt Output. Connect the INT to a logic rail via 10-kΩ resistor. The INT pin sends active low, 256-μs pulse to host to report charger device status and fault. |
| OTG | 8 | DI | Boost mode enable pin. The boost mode is activated when OTG_CONFIG =1, OTG pin is high, and no input source is detected at VBUS |
| CE | 9 | DI | Active low Charge Enable pin. Battery charging is enabled when CHG_CONFIG = 1 and CE pin = Low. CE pin must be pulled High or Low. |
| ILIM | 10 | AI | Input current limit Input. ILIM pin sets the maximum input current and can be used to monitor input current ILIM pin sets the maximum input current limit by regulating the ILIM voltage at 0.8 V. A resistor is connected from ILIM pin to ground to set the maximum limit as I INMAX = K ILIM /R ILIM . The actual input current limit is the lower limit set by ILIM pin (when EN_ILIM bit is high) or IIINLIM register bits. Input current limit of less than 500 mA is not support on ILIM pin. ILIM pin can also be used to monitor input current when the voltage is below 0.8V. The input current is proportional to the voltage on ILIM pin and can be calculated by I IN = (K ILIM x V ILIM ) / (R ILIM x 0.8) The ILIM pin function can be disabled when EN_ILIM bit is 0. |
Electrical Characteristics
VVBUS_UVLOZ < VVBUS < VACOV and VVBUS > VBAT + VSLEEP, TJ = -40°C to +125°C and TJ = 25°C for typical values (unless otherwise noted)
| PARAMETER | PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT |
|---|---|---|---|---|---|---|
| QUIESCENT CURRENTS | QUIESCENT CURRENTS | QUIESCENT CURRENTS V BAT = 4.2 V, V (VBUS) < V (UVLO) , leakage between BAT and VBUS | QUIESCENT CURRENTS | QUIESCENT CURRENTS | QUIESCENT CURRENTS 5 | QUIESCENT CURRENTS μA |
| I BAT | Battery discharge current (BAT, SW, SYS) in buck mode | High-Z mode, no VBUS, BATFET disabled (REG09[5]=1), battery monitor disabled, T J < 85°C | 12 | 23 | μA | |
| High-Z mode, no VBUS, BATFET enabled (REG09[5]=0), battery monitor disabled, T J < 85°C | 32 | 60 | μA | |||
| I (VBUS_HIZ) | Input supply current (VBUS) in buck mode when High-Z mode is enabled | V (VBUS) = 5 V, High-Z mode, no battery, battery monitor disabled | 15 | 35 | μA | |
| V (VBUS) = 12 V, High-Z mode, no battery, battery monitor disabled | 25 | 50 | μA | |||
| I (VBUS) | Input supply current (V BUS ) in buck mode | V BUS > V (UVLO) , V BUS > V BAT , converter not switching V BUS > V (UVLO) , V BUS > V BAT , converter switching, V BAT = 3.2 V, I SYS = 0A V BUS > V (UVLO) , V BUS > V BAT , converter switching, V BAT = 3.8 V, I SYS = 0 A | 1.5 3 3 | 3 | mA mA mA | |
| I (BOOST) | Battery discharge current in boost mode | V BAT = 4.2 V, boost mode, I (VBUS) = 0 A, converter switching | 5 | mA | ||
| VBUS/BAT POWER UP | VBUS/BAT POWER UP | VBUS/BAT POWER UP | VBUS/BAT POWER UP | VBUS/BAT POWER UP | VBUS/BAT POWER UP | VBUS/BAT POWER UP |
| V (VBUS_OP) | VBUS operating range | 3.9 | 14 | V | ||
| V (VBUS_UVLOZ) | VBUS for active I 2 C, no battery | 3.6 | V | |||
| V (SLEEP) | Sleep mode falling threshold | 25 | 65 | 120 | mV | |
| V (SLEEPZ) | Sleep mode rising threshold | 130 | 250 | 370 | mV | |
| V | VBUS over-voltage rising threshold | 14 | 14.6 | V | ||
| (ACOV) | VBUS over-voltage falling threshold | 13.5 | 14 | V | ||
| V BAT(UVLOZ) | Battery for active I2C, no VBUS | 2.3 | V | |||
| V BAT(DPL) | Battery depletion falling threshold | 2.15 | 2.5 | V | ||
| V BAT(DPLZ) | Battery depletion rising threshold | 2.35 | 2.7 | V | ||
| V (VBUSMIN) | Bad adapter detection threshold | 3.8 | V | |||
| I (BADSRC) | Bad adapter detection current source | 30 | mA | |||
| POWER-PATH MANAGEMENT | POWER-PATH MANAGEMENT | POWER-PATH MANAGEMENT | POWER-PATH MANAGEMENT | POWER-PATH MANAGEMENT | POWER-PATH MANAGEMENT | POWER-PATH MANAGEMENT |
| V SYS | Typical system regulation voltage | I (SYS) = 0 A, V BAT > V SYS(MIN) , BATFET Disabled (REG09[5]=1) | V BAT + 50 mV | V | ||
| I (SYS) = 0 A, V BAT < V SYS(MIN) , BATFET Disabled (REG09[5]=1) | V SYS(MIN) 150 | + mV | V | |||
| V SYS(MIN) | Minimum DC system voltage output | V BAT < V SYS(MIN) , SYS_MIN = 3.5 V (REG03[3:1]=101), I SYS = 0 A | 3.50 | 3.65 | V | |
| V SYS(MAX) | Maximum DC system voltage output | V BAT = 4.35 V, SYS_MIN = 3.5V (REG03[3:1]=101), I SYS = 0 A | 4.40 | 4.42 | V |
Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted)
| MIN | MAX | VALUE | ||
|---|---|---|---|---|
| Voltage range (with respect to GND) | VBUS (converter not switching) | -2 | 22 | V |
| Voltage range (with respect to GND) | PMID (converter not switching) | -0.3 | 22 | V |
| Voltage range (with respect to GND) | STAT | -0.3 | 20 | V |
| Voltage range (with respect to GND) | DSEL | -0.3 | 20 | V |
| Voltage range (with respect to GND) | BTST | -0.3 | 20 | V |
| Voltage range (with respect to GND) | SW | -2 | 16 | V |
| Voltage range (with respect to GND) | SW (peak for 10 ns duration) | -3 | 16 | V |
| Voltage range (with respect to GND) | BAT, SYS (converter not switching) | -0.3 | 6 | V |
| Voltage range (with respect to GND) | SDA, SCL, INT, OTG, REGN, TS, CE, QON | -0.3 | 7 | V |
| Voltage range (with respect to GND) | D+, D- | -0.3 | 7 | V |
| Voltage range (with respect to GND) | BTST TO SW | -0.3 | 7 | V |
| Voltage range (with respect to GND) | PGND to GND | -0.3 | 0.3 | V |
| Voltage range (with respect to GND) | ILIM | -0.3 | 5 | V |
| Output sink current | INT, STAT | 6 | mA | |
| Output sink current | DSEL | 6 | mA | |
| Junction temperature | -40 | 150 | °C | |
| Storage temperature range, T stg | -65 | 150 | °C |
Recommended Operating Conditions
over operating free-air temperature range (unless otherwise noted)
| MIN | NOM | UNIT | ||
|---|---|---|---|---|
| V IN | Input voltage | 3.9 | 14 | V |
| I IN | Input current (VBUS) | A | ||
| I SYS | Output current (SW) | A | ||
| V BAT | Battery voltage | V | ||
| I BAT | Fast charging current | A | ||
| I BAT | Discharging current with internal MOSFET | Up to 6 (continuos) | A | |
| I BAT | Discharging current with internal MOSFET | (Up to 1 sec | A | |
| T A | Operating free-air temperature range | -40 | °C |
Thermal Information
| THERMAL METRIC (1) | THERMAL METRIC (1) | BQ25895 RTW (WQFN) 24-PINS | UNIT |
|---|---|---|---|
| R θJA | Junction-to-ambient thermal resistance | 31.8 | °C/W |
| R θJC((op) | Junction-to-case (top) thermal resistance | 27.9 | °C/W |
| R θJB | Junction-to-board thermal resistance | 8.7 | °C/W |
| ψ JT | Junction-to-top characterization parameter | 0.3 | °C/W |
| ψ JB | Junction-to-board characterization parameter | 8.7 | °C/W |
| R θJC(bot) | Junction-to-case (bottom) thermal resistance | 2 | °C/W |
Typical Application
A typical application consists of the device configured as an I 2 C controlled power path management device and a single cell battery charger for Li-Ion and Li-polymer batteries used in a wide range of smartphones and other portable devices. It integrates an input reverse-block FET (RBFET, Q1), high-side switching FET (HSFET, Q2), low-side switching FET (LSFET, Q3), and BATFET (Q4) between the system and battery. The device also integrates a bootstrap diode for the high-side gate drive.
Related Variants
The following components are covered by the same datasheet.
| Part Number | Manufacturer | Package |
|---|---|---|
| BQ25895 | Texas Instruments | WQFN-24 |
| BQ25895RTWR | Texas Instruments | 24-WFQFN Exposed Pad |
| BQ25895RTWR.A | Texas Instruments | — |
| BQ25895RTWT | Texas Instruments | 24-WFQFN Exposed Pad |
| BQ25895RTWT.A | Texas Instruments | — |
Data on this page is extracted from publicly available manufacturer datasheets using automated tools including AI. It may contain errors or omissions. Always verify specifications against the official manufacturer datasheet before making design or purchasing decisions. See our Terms of Service. Rights holders can submit a takedown request.
Get structured datasheet data via API
Get started free