The bq25040 is an integrated Li-ion linear battery charger targeted at space-limited portable applications. It operates from either a USB port or AC adapter and charges a single cell Li-Ion battery with up to 1.1A of charge current.

The bq25040 has a single power output that charges the battery. A system load can be placed in parallel with the battery. The charge current is programmed using the ISET and EN/SET inputs. The input current limit is programmable to USB100, USB500 or a user programmed current limit up to 1.1A. Additionally, a 4.9V ±3% 50mA LDO is integrated into the IC for supplying low power external circuitry. The single-input interface (EN/SET) is used to select the charge current and to place the bq25040 into Production Test Mode. In Production Test Mode, the bq25040 operates as a linear regulator without a battery connected, where the output is regulated at 4.2V and supplies up to 2.3A to calibrate GSM transceivers.

The battery is charged in three phases: conditioning, constant current and constant voltage. In all charge phases, an internal control loop monitors the IC junction temperature and reduces the charge current if an internal temperature threshold is exceeded.

The charger power stage and charge current sense functions are fully integrated. The charger function has accuracy current and voltage regulation loops, charge status display, and charge termination.

• 30V Input Rating, with Overvoltage Protection (OVP)
• Input Voltage Dynamic Power Management Feature
• 50mA Integrated Low Dropout Linear Regulator (LDO)
• 1% Charge Voltage Regulation Accuracy
• 10% Charge Current Accuracy
• Single-Input Interface Selects USB 100mA, 500mA or User-Programmable Maximum Input Current Limit
• 4.2V at 2.3A Production Test Mode
• Thermal Regulation and Thermal Shutdown Protection for Output Current Control
• Soft-Start Feature to Reduce Inrush Current
• Status Indication - Power Good and Charging/Done
• Available in Small 2mm × 3mm DFN-10 Package
• APPLICATIONS
  • Mobile Phones
  • Smart Phones
  • Portable Media Players
  • Portable Navigation Devices
  • Low-Power Handheld Devices

• Number of series cells
• 1
• Charge current (Max) (A)
• 1.1
• Operating Vin (Max) (V)
• 6.7
• Cell chemistry
• Li-Ion/Li-Polymer
• Battery charge voltage (Min) (V)
• 4.2
• Battery charge voltage (Max) (V)
• 4.2
• Absolute Vin (safety rating) (Max) ((V))
• 30
• Control interface
• Standalone (RC-Settable)
• Features
• IC thermal regulation, Input OVP, Integrated LDO, VINDPM (Input voltage threshold to maximize adaptor power)
• Operating Vin (Min) (V)
• 4.35
• Rating
• Catalog

BQ25040的完整型号有：BQ25040DQCR、BQ25040DQCT，以下是这些产品的关键参数及官网采购报价：

BQ25040DQCR，工作温度：-40 to 125，封装：WSON (DQC)-10，包装数量MPQ：3000个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网BQ25040DQCR的批量USD价格：.508（1000+）

BQ25040DQCT，工作温度：-40 to 125，封装：WSON (DQC)-10，包装数量MPQ：250个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网BQ25040DQCT的批量USD价格：.61（1000+）

BQ25040EVM — BQ25040 评估模块：1.1A 单输入单节锂离子电池充电器

BQ25040EVM 是用于 BQ25040 的评估模块 (EVM)。bq25040 是面向空间受限的便携应用的集成线性锂离子电池充电器。它由 USB 端口或 AC 适配器供电，并为单节锂离子电池提供高达 1.1A 的充电电流。bq25040 具有为电池充电的单电源输出。系统负载可以与电池并联。充电电流是使用 ISET 和 EN/SET 输入进行编程的。充电电流可编程到 USB100 和 USB500 中，用户编程的充电电流最高可达 1.1A。此外，4.9V、3%、50mA LDO 集成到集成电路 (IC) 中，旨在为低功耗外部电路供电。单输入接口 (EN/SET) 用于选择充电电流并将 (...)