BQ2004_TI 具有负 dV、PVD、dT/dt 终止功能和时间设置 1 的镍镉电池/镍氢电池降压充电器

BQ2004的基本参数

制造厂商：TI
产品类别：电源管理
技术类目：电池管理 IC - 电池充电器 IC
功能描述：具有负 dV、PVD、dT/dt 终止功能和时间设置 1 的镍镉电池/镍氢电池降压充电器
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BQ2004的产品详情：

The bq2004 Fast Charge IC provides comprehensive fast charge control functions together with high-speed switching power control circuitry on a monolithic CMOS device.

Integration of closed-loop current control circuitry allows the bq2004 to be the basis of a cost-effective solution for stand-alone and system integrated chargers for batteries of one or more cells.

Switch-activated discharge-before charge allows bq2004-based chargers to support battery conditioning and capacity determination.

High-efficiency power conversion is accomplished using the bq2004 as a hysteretic PWM controller for switch-mode regulation of the charging current. The bq2004 may alternatively be used to gate an externally regulated charging current.

Fast charge may begin on application of the charging supply, replacement of the battery, or switch depression. For safety, fast charge is inhibited unless/until the battery temperature and voltage are within configured limits.

Temperature, voltage, and time are monitored throughout fast charge. Fast charge is terminated by any of the following:

Rate of temperature time (t)
Peak voltage detection (PVD)
Negative delta voltage (-V)
Maximum voltage
Maximum temperature
Maximum time

After fast charge, optional top-off and pulsed current maintenance phases are available.

BQ2004的优势和特性：

Fast charge and conditioning of nickel cadmium or nickel-metal hydride batteries
Hysteretic PWM switch-mode current regulation or gated control of an external regulator
Easily integrated into systems or used as a stand-alone charger
Pre-charge qualification of temperature and voltage
Configurable, direct LED outputs display battery and charge status
Fast-charge termination by V, maximum voltage, maximum temperature, and maximum time
Optional top-off charge and pulsed current maintenance charging
Logic-level controlled low-power mode (< 5μA standby current)

BQ2004的参数（英文）：

Number of series cells
1, 2, 3, 4
Charge current (Max) (A)
2
Operating Vin (Max) (V)
5.5
Cell chemistry
NiCd, NiMH
Battery charge voltage (Min) (V)
0
Battery charge voltage (Max) (V)
5.5
Absolute Vin (safety rating) (Max) ((V))
7
Control interface
Standalone (RC-Settable)
Features
BAT temp thermistor monitoring (hot/cold profile)
Operating Vin (Min) (V)
4.5
Rating
Catalog

BQ2004具体的完整产品型号参数及价格（美元）：

BQ2004的完整型号有：BQ2004PN、BQ2004SN、BQ2004SNTR，以下是这些产品的关键参数及官网采购报价：

BQ2004PN，工作温度：-20 to 70，封装：PDIP (N)-16，包装数量MPQ：25个，MSL 等级/回流焊峰值温度：N/A for Pkg Type，引脚镀层/焊球材料：NIPDAU，TI官网BQ2004PN的批量USD价格：5.841（1000+）

BQ2004SN，工作温度：-20 to 70，封装：SOIC (D)-16，包装数量MPQ：40个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网BQ2004SN的批量USD价格：2.734（1000+）

BQ2004SNTR，工作温度：-20 to 70，封装：SOIC (D)-16，包装数量MPQ：2500个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网BQ2004SNTR的批量USD价格：2.296（1000+）

BQ2004的评估套件：

BQ2004的电路图解：

BQ2004的评估套件：