BQ25708中文资料SMBus 多化合物电池降压/升压充电控制器数据手册TI规格书

描述 Description

The bq25708 is a synchronous NVDC battery buck-boost charge controller, offering lowcomponent count, high efficiency solution for space-constraint, multi-chemistry battery chargingapplications.
The NVDC-1 configuration allows the system to be regulated at battery voltage, but notdrop below system minimum voltage. The system keeps operating even when the battery is completelydischarged or removed. When load power exceeds input source rating, the battery goes intosupplement mode and prevents the system from crashing.
The bq25708 charges battery from a wide range of input sources including USB adapter,high voltage USB PD sources and traditional adapters.
During power up, the charger sets converter to buck, boost or buck-boost configurationbased on input source and battery conditions. The charger automatically transits among buck, boostand buck-boost configuration without host control.
The bq25708 monitors adapter current, battery current and system power. The flexiblyprogrammed PROCHOT output goes directly to CPU for throttle back whenneeded.

特性 Features

• Charge 1- to 4-Cell Battery From Wide Range of Input Sources
• Supports USB2.0,USB 3.0, USB 3.1 (Type C), and USB_PD Input Current Settings
• Input current and VoltageRegulation (IDPM and VDPM) Against Source Overload
• Power/Current Monitor for CPUThrottling
• Input and Battery Current Monitor
• Narrow-VDC (NVDC) Power PathManagement
• Battery Supplements System When Adapter is Fully-Loaded
• 800-kHz or 1.2-MHz Programmable Switching Frequencyfor 1-µH to 3.3-µH Inductor
• SMBus Port for Optimal System Performance and StatusReporting
• Integrated ADC to Monitor Voltage, Current and Power
• ±0.5% Charge Voltage Regulation
• ±2% Input/Charge Current Monitor
• Safety
• Input, System, Battery OvervoltageProtection
• Low Battery QuiescentCurrent
• Chargeany Battery Chemistry: Li+, LiFePO4, NiCd, NiMH, Lead Acid
• Package: 32-Pin 4 ×4 WQFN