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 2cell to 5cell
battery
– Charge current up to 16.3A or 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
3.2, 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
– Single phase buck-boost flexibility through
MODE pin configuration
– Input current and voltage regulation (IINDPM
and VINDPM) against source overload
– Battery supplements system when adapter is
fully loaded
• TI-patented dual random 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 38V OTG
– Output current limit up to 8.2A based on 10mΩ
sensing resistor
• 600kHz or 800kHz programmable switching
frequency with 2.2μH or 1.5μH inductor
• SMBus host control interface for flexible system
configuration
• High accuracy for the regulation and monitor
– ±0.5% Charge voltage regulation
– ±2.5% 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 & WOA
• Appliances: battery charger,Oxygen concentrator

3 Description
The BQ25785 is a synchronous NVDC buck-boost
battery charge controller to charge a 2cell to
5cell battery from a wide range of input sources
including USB adapter, extended power range (EPR)
USB-C 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 design for
space-constrained, 2cell to 5cell 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.