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BQ2031

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具有用户可选充电算法的开关模式铅酸电池充电器

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BQ25751 正在供货 具有电源路径的独立或 I²C 控制型 70V 降压/升压铅酸电池充电控制器 BQ25751 is a higher cell count and higher charge current option.

BQ2031

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产品详情

Rating Catalog Number of series cells 6 Cell chemistry Lead Acid Charge current (max) (A) 2 Features BAT temp thermistor monitoring (hot/cold profile) Vin (min) (V) 4.5 Vin (max) (V) 5.5 Absolute max Vin (max) (V) 7 Control topology Switch-Mode Buck Battery charge voltage (min) (V) 0 Battery charge voltage (max) (V) 20 Control interface Standalone (RC-Settable) Operating temperature range (°C) -20 to 70
Rating Catalog Number of series cells 6 Cell chemistry Lead Acid Charge current (max) (A) 2 Features BAT temp thermistor monitoring (hot/cold profile) Vin (min) (V) 4.5 Vin (max) (V) 5.5 Absolute max Vin (max) (V) 7 Control topology Switch-Mode Buck Battery charge voltage (min) (V) 0 Battery charge voltage (max) (V) 20 Control interface Standalone (RC-Settable) Operating temperature range (°C) -20 to 70
SOIC (D) 16 59.4 mm² (9.9 mm × 6 mm) PDIP (N) 16 181.42 mm² (19.3 mm × 9.4 mm)
  • Conforms to battery manufacturers' charge recommendations for cyclic and float charge
  • Pin-selectable charge algorithms

    • - Two-Step Voltage with temperature-compensated constant-voltage maintenance
    - Two-Step Current with constant-rate pulsed current maintenance
    - Pulsed Current: hysteretic, on-demand pulsed current
  • Pin-selectable charge termination by maximum voltage, 2V, minimum current, and maximum time
  • Pre-charge qualification detects shorted, opened, or damaged cells and conditions battery
  • Charging continuously qualified by temperature and voltage limits
  • Internal temperature-compensated voltage reference
  • Pulse-width modulation control

    • - Ideal for high-efficiency switch-mode power conversion
    - Configurable for linear or gated current use
  • Direct LED control outputs display charge status and fault conditions
  • Conforms to battery manufacturers' charge recommendations for cyclic and float charge
  • Pin-selectable charge algorithms

    • - Two-Step Voltage with temperature-compensated constant-voltage maintenance
    - Two-Step Current with constant-rate pulsed current maintenance
    - Pulsed Current: hysteretic, on-demand pulsed current
  • Pin-selectable charge termination by maximum voltage, 2V, minimum current, and maximum time
  • Pre-charge qualification detects shorted, opened, or damaged cells and conditions battery
  • Charging continuously qualified by temperature and voltage limits
  • Internal temperature-compensated voltage reference
  • Pulse-width modulation control

    • - Ideal for high-efficiency switch-mode power conversion
    - Configurable for linear or gated current use
  • Direct LED control outputs display charge status and fault conditions

The bq2031 Lead-Acid Fast Charge IC is designed to optimize charging of lead-acid chemistry batteries. A flexible pulse-width modulation regulator allows the bq2031 to control constant-voltage, constant-current, or pulsed-current charging. The regulator frequency is set by an external capacitor for design flexibility. The switch-mode design keeps power dissipation to a minimum for high charge current applications.

A charge cycle begins when power is applied or the battery is replaced. For safety, charging is inhibited until the battery voltage is within configured limits. If the battery voltage is less than the low-voltage threshold, the bq2031 provides trickle-currentcharging until the voltage rises into the allowed range or an internal timer runs out and places the bq2031 in a Fault condition. This procedure prevents high-current charging of cells that are possibly damaged or reversed. Charging is inhibited anytime the temperature of the battery is outside the configurable, allowed range. All voltage thresholds are temperature-compensated.

The bq2031 terminates fast (bulk) charging based on the following:

  • Maximum voltage
  • Second difference of cell voltage (2V)
  • Minimum current (in constant-voltage charging)
  • Maximum time-out (MTO)
    • After bulk charging, the bq2031 provides temperature-compensated maintenance (float) charging to maintain battery capacity.

    The bq2031 Lead-Acid Fast Charge IC is designed to optimize charging of lead-acid chemistry batteries. A flexible pulse-width modulation regulator allows the bq2031 to control constant-voltage, constant-current, or pulsed-current charging. The regulator frequency is set by an external capacitor for design flexibility. The switch-mode design keeps power dissipation to a minimum for high charge current applications.

    A charge cycle begins when power is applied or the battery is replaced. For safety, charging is inhibited until the battery voltage is within configured limits. If the battery voltage is less than the low-voltage threshold, the bq2031 provides trickle-currentcharging until the voltage rises into the allowed range or an internal timer runs out and places the bq2031 in a Fault condition. This procedure prevents high-current charging of cells that are possibly damaged or reversed. Charging is inhibited anytime the temperature of the battery is outside the configurable, allowed range. All voltage thresholds are temperature-compensated.

    The bq2031 terminates fast (bulk) charging based on the following:

  • Maximum voltage
  • Second difference of cell voltage (2V)
  • Minimum current (in constant-voltage charging)
  • Maximum time-out (MTO)
    • After bulk charging, the bq2031 provides temperature-compensated maintenance (float) charging to maintain battery capacity.
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    顶层文档 类型 标题 格式选项 下载最新的英语版本 日期
    * 数据表 Lead-Acid Fast-Charge IC 数据表 1999-9-5

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