BQ24185 Series
Fully Integrated Switch-Mode One-Cell Li-Ion Charger with Full USB Compliance
Manufacturer: Texas Instruments
Link to Manufacturer Page: https://www.ti.com/
Catalog
Fully Integrated Switch-Mode One-Cell Li-Ion Charger with Full USB Compliance
| Part | Charge Current - Max [Max] | Mounting Type | Current - Charging | Voltage - Supply (Max) [Max] | Number of Cells | Supplier Device Package | Interface | Battery Pack Voltage | Operating Temperature [Min] | Operating Temperature [Max] | Programmable Features | Fault Protection | Battery Chemistry | Package / Case |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments BQ24185YFFR | 1.5 A | Surface Mount | Constant - Programmable | 16 V | 1 | 25-DSBGA | I2C | 4.44 V | -30 °C | 85 C | Timer | Over Temperature, Over Voltage | Lithium Ion/Polymer | 25-UFBGA, DSBGA |
Texas Instruments BQ24185YFFT | 1.5 A | Surface Mount | Constant - Programmable | 16 V | 1 | 25-DSBGA | I2C | 4.44 V | -30 °C | 85 C | Timer | Over Temperature, Over Voltage | Lithium Ion/Polymer | 25-UFBGA, DSBGA |
Key Features
• Charge Faster than Linear Chargers From Current Limited Input SourcesHigh-Accuracy Voltage and Current RegulationInput Current Regulation Accuracy: ±5% (100mA, 500mA)Charge Voltage Regulation Accuracy: ±0.5% (25°C), ±1% (0 – 125°C)Charge Current Regulation Accuracy: ±5%300mA, 5V Boost Mode for USB OTG SupportAccessory Power Output (DCOUT)Input Voltage Based Dynamic Power ManagementSafety Limit Register for Maximum Charge Voltage and Current LimitingHigh-Efficiency Mini-USB/AC Battery Charger for Single-Cell Li-Ionand Li-Polymer Battery Packs20V Absolute Maximum and 16.5V Operation Input Voltage RatingBuilt-in Input Current Sensing and LimitingIntegrated Power FETs for Up to 1.5A Charge RateProgrammable Charge Parameters through I2C™ compatible Interface(up to 3.4 Mbps)Synchronous Fixed-Frequency PWM Controller Operating at 3 MHzWith 0% to 99.5% Duty CycleSafety Timer and Software WatchdogReverse Leakage Protection Prevents Battery DrainageThermal Regulation and ProtectionStatus Outputs for Charging and Faults25-Pin WCSP PackageAPPLICATIONSMobile Phones and Smart PhonesPortable Media PlayersHandheld DevicesI2C is a trademark of Phillips Electronics.Charge Faster than Linear Chargers From Current Limited Input SourcesHigh-Accuracy Voltage and Current RegulationInput Current Regulation Accuracy: ±5% (100mA, 500mA)Charge Voltage Regulation Accuracy: ±0.5% (25°C), ±1% (0 – 125°C)Charge Current Regulation Accuracy: ±5%300mA, 5V Boost Mode for USB OTG SupportAccessory Power Output (DCOUT)Input Voltage Based Dynamic Power ManagementSafety Limit Register for Maximum Charge Voltage and Current LimitingHigh-Efficiency Mini-USB/AC Battery Charger for Single-Cell Li-Ionand Li-Polymer Battery Packs20V Absolute Maximum and 16.5V Operation Input Voltage RatingBuilt-in Input Current Sensing and LimitingIntegrated Power FETs for Up to 1.5A Charge RateProgrammable Charge Parameters through I2C™ compatible Interface(up to 3.4 Mbps)Synchronous Fixed-Frequency PWM Controller Operating at 3 MHzWith 0% to 99.5% Duty CycleSafety Timer and Software WatchdogReverse Leakage Protection Prevents Battery DrainageThermal Regulation and ProtectionStatus Outputs for Charging and Faults25-Pin WCSP PackageAPPLICATIONSMobile Phones and Smart PhonesPortable Media PlayersHandheld DevicesI2C is a trademark of Phillips Electronics.
Description
AI
The bq24185 is a compact, flexible, high-efficiency, USB-friendly switch-mode charge management device for single-cell Li-ion and Li-polymer batteries used in a wide range of portable applications. The charge parameters is programmable using an I2C compatible interface. The bq24185 integrates a synchronous PWM controller, power MOSFETs, input current sensing and overvoltage protection, high-accuracy current and voltage regulation, and charge termination, into a small WCSP package.
The bq24185 charges the battery in three phases: conditioning, constant current and constant voltage. Charge current is programmable using the I2C interface. Additionally, the input current can be limited to a host programmable threshold to maintain maximum charge current from current-limited sources, such as USB ports. Charge is terminated based on user-selectable minimum current level. A software watchdog provides a safety backup for I2C interface while a safety timer prevents overcharging the battery. During normal operation, bq24185 automatically restarts the charge cycle if the battery voltage falls below an internal threshold and automatically enters sleep mode or high impedance mode when the input supply is removed. The charge status is reported to the host using the I2C interface. During the charging process, the bq24185 monitors its junction temperature (TJ) and reduces the charge current if TJincreases to 125°C. To support USB OTG peripherals, the bq24185 contains boost circuitry that supplies VVBUSat 5.05V at up to 300mA by boosting the battery voltage. The bq24185 is available in 25-pin WCSP package.
The bq24185 is a compact, flexible, high-efficiency, USB-friendly switch-mode charge management device for single-cell Li-ion and Li-polymer batteries used in a wide range of portable applications. The charge parameters is programmable using an I2C compatible interface. The bq24185 integrates a synchronous PWM controller, power MOSFETs, input current sensing and overvoltage protection, high-accuracy current and voltage regulation, and charge termination, into a small WCSP package.
The bq24185 charges the battery in three phases: conditioning, constant current and constant voltage. Charge current is programmable using the I2C interface. Additionally, the input current can be limited to a host programmable threshold to maintain maximum charge current from current-limited sources, such as USB ports. Charge is terminated based on user-selectable minimum current level. A software watchdog provides a safety backup for I2C interface while a safety timer prevents overcharging the battery. During normal operation, bq24185 automatically restarts the charge cycle if the battery voltage falls below an internal threshold and automatically enters sleep mode or high impedance mode when the input supply is removed. The charge status is reported to the host using the I2C interface. During the charging process, the bq24185 monitors its junction temperature (TJ) and reduces the charge current if TJincreases to 125°C. To support USB OTG peripherals, the bq24185 contains boost circuitry that supplies VVBUSat 5.05V at up to 300mA by boosting the battery voltage. The bq24185 is available in 25-pin WCSP package.