BQ24157 - 与 USB 完全兼容的完全集成开关模式单节锂离子充电器。

BQ24157是TI德州仪器公司的一款电池充电器IC产品，BQ24157是与 USB 完全兼容的完全集成开关模式单节锂离子充电器。，本站介绍了BQ24157的封装应用图解、特点和优点、功能等，并给出了与BQ24157相关的TI元器件型号供参考。

BQ24157 - 与 USB 完全兼容的完全集成开关模式单节锂离子充电器。 - 电池充电器IC - 电池管理产品 - 德州仪器

产品特性

Power Up System without Battery
Charge Faster than Linear Chargers
High-Accuracy Voltage and Current Regulation
- Input Current Regulation Accuracy: ±5% (100 mA and 500 mA)
- Charge Voltage Regulation Accuracy: ±0.5% (25°C), ±1% (0°C to 125°C)
- Charge Current Regulation Accuracy: ±5%
Input Voltage Based Dynamic Power Management (VIN DPM)
Bad Adaptor Detection and Rejection
Safety Limit Register for Maximum Charge Voltage and Current Limiting
High-Efficiency Mini-USB/AC Battery Charger for Single-Cell Li-Ion and Li-Polymer Battery Packs
20-V Absolute Maximum Input Voltage Rating
6.5-V Maximum Operating Input Voltage
Built-In Input Current Sensing and Limiting
Integrated Power FETs for Up To 1.55-A Charge Rate
Programmable Charge Parameters through I2C™ Compatible Interface (up to 3.4 Mbps):
- Input Current Limit
- VIN DPM Threshold
- Fast-Charge/Termination Current
- Charge Regulation Voltage (3.5 V to 4.44 V)
- Low Charge Current Mode Enable/Disable
- Termination Enable/Disable
Support up to 1.55A Charge Current using 55 mΩ Sensing Resistor
Synchronous Fixed-Frequency PWM Controller Operating at 3 MHz With 0% to 99.5% Duty Cycle
Automatic High Impedance Mode for Low Power Consumption
Robust Protection
- Reverse Leakage Protection Prevents Battery Drainage
- Thermal Regulation and Protection
- Input/Output Overvoltage Protection
Status Output for Charging and Faults
USB Friendly Boot-Up Sequence
Automatic Charging
Boost Mode Operation for USB OTG
- Input Voltage Range (from Battery): 3.2 V to 4.5 V
2.1 mm x 2 mm 20-Pin WCSP Package

产品应用

Mobile and Smart Phones
MP3 Players
Handheld Devices

产品说明

The bq24157 is a compact, flexible, high-efficiency, USB-friendly switch-mode charge management device for single-cell Li-ion and Li-polymer batteries used in a wide range of portable applications. The charge parameters can be programmed through an I2C interface. The IC integrates a synchronous PWM controller, power MOSFETs, input current sensing, high-accuracy current and voltage regulation, and charge termination, into a small WCSP package.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (NOM)
bq24157	WCSP (20-Pin)	2.1 mm x 2.0 mm

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