產品詳細資料

Number of series cells 1 Charge current (max) (A) 3 Vin (max) (V) 17 Cell chemistry Li-Ion/Li-Polymer, Lithium Phosphate/LiFePO4 Battery charge voltage (min) (V) 3.6 Battery charge voltage (max) (V) 4.2 Absolute max Vin (max) (V) 28 Control topology Switch-Mode Buck Control interface Standalone (RC-Settable) Features BAT temp thermistor monitoring (hot/cold profile), IINDPM (Input current limit), Input OVP, VINDPM (Input voltage threshold to maximize adaptor power) Vin (min) (V) 4 Rating Catalog Operating temperature range (°C) -40 to 85
Number of series cells 1 Charge current (max) (A) 3 Vin (max) (V) 17 Cell chemistry Li-Ion/Li-Polymer, Lithium Phosphate/LiFePO4 Battery charge voltage (min) (V) 3.6 Battery charge voltage (max) (V) 4.2 Absolute max Vin (max) (V) 28 Control topology Switch-Mode Buck Control interface Standalone (RC-Settable) Features BAT temp thermistor monitoring (hot/cold profile), IINDPM (Input current limit), Input OVP, VINDPM (Input voltage threshold to maximize adaptor power) Vin (min) (V) 4 Rating Catalog Operating temperature range (°C) -40 to 85
WQFN (RTE) 16 9 mm² 3 x 3
  • Standalone charger and easy to configure
  • High-efficiency, 1.2MHz, synchronous switch-mode buck charger
    • 92.5% charge efficiency at 2A from 5V input for 1-cell battery
    • 91.8% charge efficiency at 2A from 9V input for 1-cell battery
  • Single input to support USB input and high voltage adaptors
    • Supports 4.1V - 17V input voltage range with 28V absolute maximum input voltage rating
    • Input Voltage Dynamic Power Management (VINDPM) tracking battery voltage
  • High integration
    • Integrated reverse blocking and synchronous switching MOSFET
    • Internal input and charge current sense
    • Internal loop compensation
    • Integrated bootstrap diode
  • 3.6V / 4.05V / 4.15V / 4.2V charge voltage
  • 3.0A maximum fast charge current
  • 200nA low battery leakage current at 4.5V VBAT
  • 4.25µA VBUS supply current in IC disable mode
  • Charge current thermal regulation at 120°C
  • Precharge current: 10% of fast charge current
  • Termination current: 10% of fast charge current
  • Charge accuracy
    • ±0.5% charge voltage regulation
    • ±10% charge current regulation
  • Safety
    • Disable charge for dead battery condition
    • Thermal regulation and thermal shutdown
    • Input Under-Voltage Lockout (UVLO) and Over-Voltage Protection (OVP)
    • Battery overcharge protection
    • Safety timer for precharge and fast charge
    • Charge disabled if current setting pin ICHG is open or short
    • Cold/hot battery temperature protection
    • Fault report on STAT pin
  • Available in a WQFN 3x3-16 package
  • Standalone charger and easy to configure
  • High-efficiency, 1.2MHz, synchronous switch-mode buck charger
    • 92.5% charge efficiency at 2A from 5V input for 1-cell battery
    • 91.8% charge efficiency at 2A from 9V input for 1-cell battery
  • Single input to support USB input and high voltage adaptors
    • Supports 4.1V - 17V input voltage range with 28V absolute maximum input voltage rating
    • Input Voltage Dynamic Power Management (VINDPM) tracking battery voltage
  • High integration
    • Integrated reverse blocking and synchronous switching MOSFET
    • Internal input and charge current sense
    • Internal loop compensation
    • Integrated bootstrap diode
  • 3.6V / 4.05V / 4.15V / 4.2V charge voltage
  • 3.0A maximum fast charge current
  • 200nA low battery leakage current at 4.5V VBAT
  • 4.25µA VBUS supply current in IC disable mode
  • Charge current thermal regulation at 120°C
  • Precharge current: 10% of fast charge current
  • Termination current: 10% of fast charge current
  • Charge accuracy
    • ±0.5% charge voltage regulation
    • ±10% charge current regulation
  • Safety
    • Disable charge for dead battery condition
    • Thermal regulation and thermal shutdown
    • Input Under-Voltage Lockout (UVLO) and Over-Voltage Protection (OVP)
    • Battery overcharge protection
    • Safety timer for precharge and fast charge
    • Charge disabled if current setting pin ICHG is open or short
    • Cold/hot battery temperature protection
    • Fault report on STAT pin
  • Available in a WQFN 3x3-16 package

The BQ25308 is a highly-integrated standalone switch-mode battery charger for 1-cell Li-ion, Li-polymer, and LiFePO4 batteries. The BQ25308 supports 4.1V to 17V input voltage and 3A fast charge current. The integrated current sensing topology of the device enables high charge efficiency and low BOM cost. The best-in-class 200nA low quiescent current of the device conserves battery energy and maximizes the shelf time for portable devices. The BQ25308 is available in a 3x3 WQFN package for easy 2-layer layout and space limited applications.

The BQ25308 supports a 4.1V to 17V input to charge single cell batteries. The BQ25308 provides up to 3A continuous charge current to a single cell 1S battery. The device features fast charging for portable devices. Its input voltage regulation delivers maximum charging power to the battery from the input source. The solution is highly integrated with an input reverse-blocking FET (RBFET, Q1), high-side switching FET (HSFET, Q2), and low-side switching FET (LSFET, Q3). The device also provides a safety feature that completely inhibits charging of a dead battery.

The BQ25308 features lossless integrated current sensing to reduce power loss and BOM cost with minimized component count. It also integrates a bootstrap diode for the high-side gate drive and battery temperature monitor to simplify system design. The device initiates and completes a charging cycle without host control. The BQ25308 charge voltage and charge current are set by external resistors. The BQ25308 detects the charge voltage setting at startup and charges the battery in four phases: battery short, pre-conditioning, constant current, and constant voltage. At the end of the charging cycle, the charger automatically terminates if the charge current is below the termination current threshold and the battery voltage is above the recharge threshold. When the battery voltage falls below the recharge threshold, the charger will automatically start another charging cycle. The charger provides various safety features for battery charging and system operations, including battery temperature monitoring based on negative temperature coefficient (NTC) thermistor, charge safety timer, input over-voltage and over-current protections, as well as battery over-voltage protection. Pin open and short protection is also built in to protect against the charge current setting pin ICHG accidently open or short to GND. The thermal regulation regulates charge current to limit die temperature during high power operation or high ambient temperature conditions.

The STAT pin output reports charging status and fault conditions. When the input voltage is removed, the device automatically enters HiZ mode with very low leakage current from battery to the charger device. The BQ25308 is available in a 3mm x 3mm thin WQFN package.

The BQ25308 is a highly-integrated standalone switch-mode battery charger for 1-cell Li-ion, Li-polymer, and LiFePO4 batteries. The BQ25308 supports 4.1V to 17V input voltage and 3A fast charge current. The integrated current sensing topology of the device enables high charge efficiency and low BOM cost. The best-in-class 200nA low quiescent current of the device conserves battery energy and maximizes the shelf time for portable devices. The BQ25308 is available in a 3x3 WQFN package for easy 2-layer layout and space limited applications.

The BQ25308 supports a 4.1V to 17V input to charge single cell batteries. The BQ25308 provides up to 3A continuous charge current to a single cell 1S battery. The device features fast charging for portable devices. Its input voltage regulation delivers maximum charging power to the battery from the input source. The solution is highly integrated with an input reverse-blocking FET (RBFET, Q1), high-side switching FET (HSFET, Q2), and low-side switching FET (LSFET, Q3). The device also provides a safety feature that completely inhibits charging of a dead battery.

The BQ25308 features lossless integrated current sensing to reduce power loss and BOM cost with minimized component count. It also integrates a bootstrap diode for the high-side gate drive and battery temperature monitor to simplify system design. The device initiates and completes a charging cycle without host control. The BQ25308 charge voltage and charge current are set by external resistors. The BQ25308 detects the charge voltage setting at startup and charges the battery in four phases: battery short, pre-conditioning, constant current, and constant voltage. At the end of the charging cycle, the charger automatically terminates if the charge current is below the termination current threshold and the battery voltage is above the recharge threshold. When the battery voltage falls below the recharge threshold, the charger will automatically start another charging cycle. The charger provides various safety features for battery charging and system operations, including battery temperature monitoring based on negative temperature coefficient (NTC) thermistor, charge safety timer, input over-voltage and over-current protections, as well as battery over-voltage protection. Pin open and short protection is also built in to protect against the charge current setting pin ICHG accidently open or short to GND. The thermal regulation regulates charge current to limit die temperature during high power operation or high ambient temperature conditions.

The STAT pin output reports charging status and fault conditions. When the input voltage is removed, the device automatically enters HiZ mode with very low leakage current from battery to the charger device. The BQ25308 is available in a 3mm x 3mm thin WQFN package.

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* Data sheet BQ25308 Standalone 1-Cell, 17V, 3.0A Battery Charger with Dead Battery Charge Inhibit datasheet PDF | HTML 2024年 4月 9日
White paper Understanding Functional Safety FIT Base Failure Rate Estimates per IEC 62380 and SN 29500 (Rev. A) PDF | HTML 2024年 4月 30日
EVM User's guide BQ25308 Evaluation Module User’s Guide PDF | HTML 2024年 4月 9日
Certificate BQ25308EVM EU Declaration of Conformity (DoC) 2024年 4月 5日

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BQ25308EVM — BQ25308 評估模組

BQ25308 評估模組 (EVM) 是用於評估 BQ25308 裝置的完整充電器模組。這是一款高度整合的 3A 獨立式 1 芯、17V、1.2MHz 同步切換模式降壓電池充電器。

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WQFN (RTE) 16 Ultra Librarian

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