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バッテリ・チャージャ IC

BQ24257

新規設計での使用を推奨しません

2A、シングル入力、I2C/スタンドアロン・スイッチモード・リチウムイオン・バッテリ・チャージャ

ご注文はこちら
データシート
BQ24257 は新規設計での使用を推奨しません
これまでにご購入されたお客様をサポートする目的でこの製品を引き続き生産しています。新規設計では代替品をご検討ください。
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比較対象デバイスと類似の機能
BQ25600 アクティブ パワー・パス搭載、OTG 対応、WCSP 封止、I2C、1 セル、3A 降圧バッテリ・チャージャ This product is 3A, 1S I2C switching charger with OTG support and WCSP Package
BQ25601 アクティブ パワー・パス搭載、OTG 対応、I2C、1 セル、3A 降圧バッテリ・チャージャ This product is 3A, 1S I2C switching charger with OTG support and WQFN Package

BQ24257

新規設計での使用を推奨しません
データシート ご注文はこちら

製品詳細

Number of series cells 1 Charge current (max) (A) 2 Vin (max) (V) 6.5 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (min) (V) 3.5 Battery charge voltage (max) (V) 4.44 Absolute max Vin (max) (V) 20 Control topology Switch-Mode Buck Control interface I2C, Standalone (RC-Settable) Vin (min) (V) 4.35 Rating Catalog Operating temperature range (°C) -40 to 85
Number of series cells 1 Charge current (max) (A) 2 Vin (max) (V) 6.5 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (min) (V) 3.5 Battery charge voltage (max) (V) 4.44 Absolute max Vin (max) (V) 20 Control topology Switch-Mode Buck Control interface I2C, Standalone (RC-Settable) Vin (min) (V) 4.35 Rating Catalog Operating temperature range (°C) -40 to 85
DSBGA (YFF) 30 5.71999999999999912 mm² 2.2 x 2.5999999999999996 VQFN (RGE) 24 16 mm² 4 x 4
  • High-efficiency Switch-mode Charger with Integrated Current Sense Resistor
  • BC1.2 D+, D– Detection with Dead Battery Provision (DBP) Pin-to-Sync with External USB-PHI
  • USB Charging Compliant
  • Selectable Input Current Limit of 100 mA,
    150 mA, 500 mA, 900 mA. 1.5 A, and 2 A
  • Watchdog Timer with Disable Bit
  • Integrated 4.9-V, 50-mA LDO
  • Complete System Level Protection
    • Input UVLO, Input Overvoltage Protection (OVP), Battery OVP, Sleep Mode, VIN_DPM
    • Input Current Limit
    • Charge Current Limit
    • Thermal Regulation and Thermal Shutdown
    • Voltage Based, JEITA Compatible NTC Monitoring Input
    • Safety Timer
  • In Host Mode, Programmable VBATREG, ICHG, ILIM, VIN_DPM, VOVP and safety timer in host mode (after I2C Communication and Before Watchdog Timer Times Out)
  • In Standalone Mode, Resistor Programmable ICHG, ILIM, and VIN_DPM in Standalone Mode (before I2C Communication and After Watchdog Timer Times Out)
  • 20-V Maximum Input Voltage Rating
  • 10.5-V Maximum Operating Input Voltage
  • Low RDS(on) Integrated Sense Resistor for up to 2-A Charging Rate
  • Open Drain Status Outputs
  • Synchronous Fixed-frequency PWM Controller Operating at 3 MHz for Small Inductor Support
  • Robust Battery Detection Algorithm
  • Charge Time Optimizer for Improved Charge Times at any Given Charge Current
  • High-efficiency Switch-mode Charger with Integrated Current Sense Resistor
  • BC1.2 D+, D– Detection with Dead Battery Provision (DBP) Pin-to-Sync with External USB-PHI
  • USB Charging Compliant
  • Selectable Input Current Limit of 100 mA,
    150 mA, 500 mA, 900 mA. 1.5 A, and 2 A
  • Watchdog Timer with Disable Bit
  • Integrated 4.9-V, 50-mA LDO
  • Complete System Level Protection
    • Input UVLO, Input Overvoltage Protection (OVP), Battery OVP, Sleep Mode, VIN_DPM
    • Input Current Limit
    • Charge Current Limit
    • Thermal Regulation and Thermal Shutdown
    • Voltage Based, JEITA Compatible NTC Monitoring Input
    • Safety Timer
  • In Host Mode, Programmable VBATREG, ICHG, ILIM, VIN_DPM, VOVP and safety timer in host mode (after I2C Communication and Before Watchdog Timer Times Out)
  • In Standalone Mode, Resistor Programmable ICHG, ILIM, and VIN_DPM in Standalone Mode (before I2C Communication and After Watchdog Timer Times Out)
  • 20-V Maximum Input Voltage Rating
  • 10.5-V Maximum Operating Input Voltage
  • Low RDS(on) Integrated Sense Resistor for up to 2-A Charging Rate
  • Open Drain Status Outputs
  • Synchronous Fixed-frequency PWM Controller Operating at 3 MHz for Small Inductor Support
  • Robust Battery Detection Algorithm
  • Charge Time Optimizer for Improved Charge Times at any Given Charge Current

The bq2425x is a highly integrated single-cell Li-Ion battery charger with integrated current sense resistor targeted for space-limited, portable applications with high capacity batteries. The single cell charger has a single input that operates from either a USB port or AC wall adapter for a versatile solution. BC1.2 compatible D+, D- detection allows for recognition of CDP, DCP, SDP, and non-standard USB adapters. The use of an accessory dead battery provision (DBP) pin allows for the system to sync a dead battery state in order to enable or disable the BC1.2 detection in the event of an external USB-PHI.

The bq24257 has two modes of operation: 1) I2C mode, and 2) Standalone mode. In I2C mode, the host can adjust the charge parameters and monitor the status of the charger operation. In Standalone mode, the external resistor sets the input current limit, charge current limit, and the input DPM level. This mode also serves as the default settings when a DCP adapter is present. The bq24257 enters host mode while the I2C registers are accessed and the watchdog timer has not expired (if enabled).

For all available packages, see the orderable addendum at the end of the datasheet.

All trademarks are the property of their respective owners.

The bq24258 has only one mode of operation which is the Standalone. In this mode, the external resistor sets the input current limit, charge current limit, and the input DPM level. This mode also serves as the default settings when a DCP adapter is present. The EN1, EN2, and EN3 pin are available in the bq24258 spin to support USB 3.0 compliance.

The battery is charged in four phases: trickle charge, pre-charge, constant current and constant voltage. In all charge phases, an internal control loop monitors the device junction temperature and reduces the charge current if the internal temperature threshold is exceeded. Additionally, a voltage-based, JEITA compatible battery pack thermistor monitoring input (TS) is included that monitors battery temperature for safe charging.

The bq2425x is a highly integrated single-cell Li-Ion battery charger with integrated current sense resistor targeted for space-limited, portable applications with high capacity batteries. The single cell charger has a single input that operates from either a USB port or AC wall adapter for a versatile solution. BC1.2 compatible D+, D- detection allows for recognition of CDP, DCP, SDP, and non-standard USB adapters. The use of an accessory dead battery provision (DBP) pin allows for the system to sync a dead battery state in order to enable or disable the BC1.2 detection in the event of an external USB-PHI.

The bq24257 has two modes of operation: 1) I2C mode, and 2) Standalone mode. In I2C mode, the host can adjust the charge parameters and monitor the status of the charger operation. In Standalone mode, the external resistor sets the input current limit, charge current limit, and the input DPM level. This mode also serves as the default settings when a DCP adapter is present. The bq24257 enters host mode while the I2C registers are accessed and the watchdog timer has not expired (if enabled).

For all available packages, see the orderable addendum at the end of the datasheet.

All trademarks are the property of their respective owners.

The bq24258 has only one mode of operation which is the Standalone. In this mode, the external resistor sets the input current limit, charge current limit, and the input DPM level. This mode also serves as the default settings when a DCP adapter is present. The EN1, EN2, and EN3 pin are available in the bq24258 spin to support USB 3.0 compliance.

The battery is charged in four phases: trickle charge, pre-charge, constant current and constant voltage. In all charge phases, an internal control loop monitors the device junction temperature and reduces the charge current if the internal temperature threshold is exceeded. Additionally, a voltage-based, JEITA compatible battery pack thermistor monitoring input (TS) is included that monitors battery temperature for safe charging.
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種類 タイトル 最新の英語版をダウンロード 日付
* データシート bq24257, bq24258 2-A Single Input I2C, Standalone Switch-Mode Li-Ion/LiFePO4 Battery Charger with Integrated Current-Sense Resistor データシート (Rev. C) PDF | HTML 2013年 8月 30日

購入と品質

記載されている情報：
  • RoHS
  • REACH
  • デバイスのマーキング
  • リード端子の仕上げ / ボールの原材料
  • MSL 定格 / ピーク リフロー
  • MTBF/FIT 推定値
  • 使用原材料
  • 認定試験結果
  • 継続的な信頼性モニタ試験結果
記載されている情報：
  • ファブの拠点
  • 組み立てを実施した拠点