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 precharge

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 Rdson 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.