The bq2002E and bq2002G Fast-Charge ICs are low-cost CMOS battery-charge controllers providing reliable charge termination for both NiCd and NiMH battery applications. Controlling a current-limited or constant-current supply allows the bq2002E/G to be the basis for a cost-effective stand-alone or system-integrated charger. The bq2002E/G integrates fast charge with optional top-off and pulsed-trickle control in a single IC for charging one or more NiCd or NiMH battery cells.

Fast charge is initiated on application of the charging supply or battery replacement. For safety, fast charge is inhibited if the battery temperature and voltage are outside configured limits.

Fast charge is terminated by any of the following:

• Peak voltage detection (PVD)
• Negative delta voltage (-V)
• Maximum voltage
• Maximum temperature
• Maximum time

After fast charge, the bq2002E/G optionally tops-off and pulse-trickles the battery per the pre-configured limits. Fast charge may be inhibited using the INH pin. The bq2002E/G may also be placed in low-standby-power mode to reduce system power consumption. The bq2002E differs from the bq2002G only in that a slightly different set of fast-charge and top-off time limits is available. All differences between the two ICs are illustrated in Table 1.

• Fast charge of nickel cadmium or nickel-metal hydride batteries
• Direct LED output displays charge status
• Fast-charge termination by -V, maximum voltage, maximum temperature, and maximum time
• Internal band-gap voltage reference
• Optional top-off charge
• Selectable pulse trickle charge rates
• Low-power mode
• 8-pin 300-mil DIP or 150-mil SOIC

• Number of series cells
• 1, 2, 3, 4
• Charge current (Max) (A)
• 2
• Operating Vin (Max) (V)
• 6
• Cell chemistry
• NiCd, NiMH
• Battery charge voltage (Min) (V)
• 0
• Battery charge voltage (Max) (V)
• 6
• 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
• Rating
• Catalog

BQ2002E的完整型号有：BQ2002ESN、BQ2002ESNTR，以下是这些产品的关键参数及官网采购报价：

BQ2002ESN，工作温度：0 to 70，封装：SOIC (D)-8，包装数量MPQ：75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BQ2002ESN的批量USD价格：.981（1000+）

BQ2002ESNTR，工作温度：0 to 70，封装：SOIC (D)-8，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BQ2002ESNTR的批量USD价格：.824（1000+）

TEMPSENSE-SW — 温度传感设计软件

The TempSense Designer software allows the user to easily design temperature sensing circuits for many of the Texas Instruments battery charger devices. A full listing of the supported devices is included under the "Support" menu in the program. The user can use the thermisters included in the (...)