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首页TI BQ25980:高效双输入并联电池充电器详解
TI BQ25980:高效双输入并联电池充电器详解
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更新于2024-08-04
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TI-BQ25980是一款先进的I2C控制的双电池、8个开关电容并联充电器,专为高效率设计,特别适用于需要高效能且快速充电的2节电池系统。这款充电器的核心特点是其专利的双相开关电容架构,能够以高达98.6%的峰值效率运作,支持高达2A的快速充电能力。它允许输入电压是电池电压的两倍(从7.0V到9.54V),同时输出电流可达到输入电流的两倍,最高可达4.75A,显著降低了通过输入电缆的功率损失。 BQ25980集成了一个7A的旁路模式快速充电功能,配备13mΩ的充电路径电阻,确保在大电流工作时也能保持高效。此外,该充电器还具备智能的双输入电源选择控制器,可以自动选择最适合的电源源,适应更广泛的输入电压范围。它可以处理高达22V的运行输入电压,如果配合外部交流FET,最大输入电压可达40V;而在不使用外部交流FET的情况下,最大输入电压为28V。 当进行并联充电时,BQ25980能够同步两个器件的工作,实现高达12A的总充电电流,这对于需要大量电能的应用来说非常实用。为了保障安全,该充电器内置了可编程的保护功能,包括输入过电压保护(BUSOVP)、电池过电压保护(BATOVP)、输入过电流保护(BUSOCP)以及电池过电流保护(BATOCP),这些特性确保了系统的稳定性和可靠性。 TI-BQ25980是一款高度集成且功能强大的充电解决方案,适用于对效率、快速充电、安全性和兼容性有严格要求的电子设备,如移动电源、无人机、电动工具等应用领域。
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BQ25980 I
2
C Controlled, 2-Cell, 8-A Switched Cap Parallel Battery Charger with
Integrated Protection and Dual-Input Selector
1 Features
• 98.6% peak efficiency switched cap parallel
charger supporting 2-cell battery and 8-A fast
charge
• Patent pending dual phase switched cap
architecture optimized for highest efficiency
– Input voltage is 2x battery voltage (7.0V to
9.54V)
– Output current is 2x of input current (up to
4.75A)
– Reduces power loss across input cable
• Integrated 7-A bypass mode fast charge
– 13mΩ charging path resistance for high current
operation
• Dual-input power mux controller for source
selection
• Support wide range of input voltage
– Up to 22-V operational input voltage
– Maximum 40-V input voltage with optional
external ACFET and 28-V without external
ACFET
• Parallel charging with synchronized dual BQ25980
operations for up-to 12-A charging current
• Integrated programmable protection features for
safe operation
– Input over-voltage protection (BUSOVP) and
battery over-voltage protection (BATOVP)
– Input over-current protection (BUSOCP) and
battery over-current protection (BATOCP)
– Output over-voltage protection (VOUTOVP)
– Input under-current protection (BUSUCP) and
input reverse-current protection (BUSRCP) to
detect adapter unplug and prevent boost-back
– Input short-circuit protection (BUSSCP)
– Battery and connector temperature monitoring
(TSBAT_FLT and TSBUS_FLT)
– Junction over-temperature protection
(TDIE_FLT)
– Optional input over-voltage protection with
external ACFET up to 40V
• Programmable settings for system optimization
– Interrupts and interrupt masks
– ADC readings and configuration
• Integrated 16-bit ADC for voltage, current and
temperature monitoring
2 Applications
• Smartphone, Tablet, Non-military Drone
• Chromebook, Notebook
3 Description
The BQ25980 is a 98.6% peak efficiency, 8-A battery
charging solution using dual-phase switched cap
architecture for 2-cell Li-ion battery. The switched cap
architecture allows the cable current to be half the
charging current, reducing the cable power loss and
limiting temperature rise. The dual-phase architecture
increases charging efficiency and reduces the input
and output cap requirements. When used with a main
charger such as BQ25790, the system enables the
fast charging at the very low power loss from pre-
charge through constant current (CC), constant
voltage (CV), and termination.
The BQ25980 also supports 7-A bypass mode charge
(previously called battery switch charge) through
internal MOSFETs. The R
dson
in bypass mode
charging path is less than 13mΩ for high current
operation. The integrated bypass mode allows
backward compatibility of 10-V fast charging adapter
to charge 2-cell battery.
The device supports dual input configuration through
integrated mux control and driver for external N-FETs.
It also allows single input with no external N-FET or
single N-FET.
Device Information
PART NUMBER
(1)
PACKAGE BODY SIZE (NOM)
BQ25980 DSBGA (80) 3.2 mm x 4.1 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Adapter
Type C Connector
VBUS
AC/DC
Converter
Host + PD Controller
D+/D-
CC1/ CC2
Type C Connector
VOUT
SYS
BAT
SYSTEM
BQ25980
(Parallel charger)
SC Phase
#1
SC Phase
#2
BQ25790
(Main charger)
SW
Battery
D+/D-
PD Controller
AP
Phone
I2C
VBUS
Simplified Schematic
www.ti.com
BQ25980
SLUSEC6 – SEPTEMBER 2020
Copyright © 2020 Texas Instruments Incorporated
Submit Document Feedback
1
Product Folder Links: BQ25980
BQ25980
SLUSEC6 – SEPTEMBER 2020
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
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