1 Features

? TI patented quasi dual phase buck-boost narrow

voltage DC (NVDC) charger for USB-C Extended

Power Range (EPR) interface platform

– 3.5V to 40V input range to charge 2- to 5-cell

battery

– Charge current up to 16.3A/30A based on

5mΩ/2mΩ sensing resistor

– Input current limit up to 8.2A/16.4A based on

10mΩ/5mΩ sensing resistor

– Support USB 2.0, USB 3.0, USB 3.1, USB-C

power delivery and extended power range input

current setting

– Input Current Optimizer (ICO) to extract max

input power without overloading the adapter

– Integrated Fast Role Swap (FRS) feature

following USB-PD specification

– Seamless transition between quasi dual phase

buck, buck-boost, and boost operations

– Input current and voltage regulation (IINDPM

and VINDPM) against source overload

– Battery supplements system when adapter is

fully loaded

? TI patented dual ramdom spread spectrum

(DRSS) for meeting IEC-CISPR 32 EMI

specification

? TI patented Pass Through Mode (PTM) for >99%

efficiency and battery fast charging support

? IMVP8/IMVP9 compliant system features for Intel

platform

– Enhanced Vmin Active Protection (VAP) mode

supplements battery from input capacitors

during system peak power spike following latest

Intel specification

– Comprehensive PROCHOT profile

– Two level discharge current limit PROCHOT

profile to avoid battery wear out

– System power monitor (PSYS)

? Input and battery current monitor through

dedicated pins

? Integrated 16-bit ADC to monitor voltage, current

and power

? Battery MOSFET ideal diode operation in

supplement mode

? Power up USB port from battery (USB OTG)

– 3V to 5V OTG

– Output current limit up to 3A based on 10mΩ

sensing resistor

? 600kHz/800kHz programmable switching

frequency

? I2C host control interface for flexible system

configuration

? High accuracy for the regulation and monitor

– ±0.5% Charge voltage regulation

– ±2% Charge current regulation

– ±2% Input current regulation

– ±2% Input/charge current monitor

? Safety

– Thermal regulation and thermal shutdown

– Input, system, battery overvoltage protection

– Input, MOSFET, inductor overcurrent protection

? Package: 36-Pins 4.0mm × 5.0mm WQFN

2 Applications

? Standard notebook PC,Chromebook

? Appliances: battery charger,Oxygen concentrator

3 Description

The BQ25773 is a synchronous NVDC buck-boost

battery charge controller to charge a 2- to 5-cell

battery from a wide range of input sources including

USB adapter, extended power range (EPR) USBC

Power Delivery (PD) sources, standard power

range (SPR) USB-C Power Delivery (PD) sources

and traditional adapters. The device offers a low

component count, high efficiency solution for space

constrained, 2- to 5-cell battery charging applications.

The NVDC configuration allows the system to be

regulated based on battery voltage, but not drop

below system minimum voltage. The system keeps

operating even when the battery is completely

discharged or removed. When load power exceeds

input source rating, the battery goes into supplement

mode and prevents the system from crashing.