BQ25750数据手册TI中文资料规格书

描述 Description

The BQ25750 is a wide input voltage, switched-mode buck-boost Li-Ion, Li-polymer, or LiFePO 4 battery charge controller with direct power path control. The device offers high-efficiency battery charging over a wide voltage range with accurate charge current and charge voltage regulation, in addition to automatic charge preconditioning, termination, and charge status indication. The device integrates all the loop compensation for the buck-boost converter, thereby providing a high density solution with ease of use. In reverse mode, the device draws power from the battery and regulates the SYS terminal voltage.

Besides the I 2C host-controlled charging mode, the device also supports standalone charging mode via resistor programmable limits. Input current, charge current and charge voltage regulation targets can be set via the ILIM_HIZ, ICHG and FB pins, respectively.

The device has three status pins (STAT1, STAT2, and PG) to indicate the charging status and input voltage status. These pins can be used to drive LEDs or communicate with a host processor. If needed, these pins can also be used as general purpose indicators and their status controlled directly by the I2C interface. The INT pin immediately notifies host when the device status changes, including faults.

The device also provides an analog-to-digital converter (ADC) for monitoring input current, charge current and input/battery/system/thermistor voltages.

The device comes with a 36-pin 5.0 mm × 6.0 mm QFN package with 0.5 mm pin pitch.

特性 Features

• Wide input voltage operating range: 4.2 V to 70 V
• Wide battery voltage operating range: up-to 70 V with multi-chemistry support:
• 1- to 14-cell Li-ion charge profile
• 1- to 16-cell LiFePO 4 charge profile

• Synchronous buck-boost charge controller with NFET drivers
• Adjustable switching frequency from 200 kHz to 600 kHz
• Optional synchronization to external clock
• Integrated loop compensation with soft start
• Optional gate driver supply input for optimized efficiency

• Bidirectional converter operation (Reverse Mode) supporting USB-PD Extended Power Range (EPR)
• Adjustable input voltage (VAC) regulation from 3.3 V to 65 V with 20-mV/step
• Adjustable input current regulation (R AC_SNS) from 400 mA to 20 A with 50-mA/step using 5-mΩ resistor

• Direct power path management for highest efficiency to power system
• System power selection from adapter or battery
• Dynamic power management
• All N-channel FET drivers

• High accuracy
• ±0.5% charge voltage regulation
• ±3% charge current regulation
• ±3% input current regulation

• I 2C controlled for optimal system performance with resistor-programmable option
• Hardware adjustable input and output current limits

• Integrated 16-bit ADC for voltage, current, and temperature monitoring
• Low battery quiescent current
• High safety integration
• Adjustable input overvoltage and undervoltage protection
• Battery overvoltage and overcurrent protection
• Charging safety timer
• Battery short protection
• Thermal shutdown

• Status outputs
• Adapter present status ( PG)
• Charger operation status

• Package
• 36-pin 5 mm × 6 mm QFN