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BQ25790 Datasheet

Buck-Boost Battery Charger

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BQ25790
SLUSDF9 – JUNE 2020
BQ25790 I2C Controlled, 1-4 Cell, 5-A Buck-Boost Battery Charger with Dual-Input
Selector and USB PD 3.0 OTG Output
1 Features
1 High efficient synchronous Switch Mode buck-
boost charger for 1-4 cell battery
– 750-kHz and 1.5-MHz Programmable
switching frequencies
– Efficiency optimized for charging 2s battery,
96.5% efficiency with 9-V input and 94.5%
efficiency with 15-V input at 3-A ICHG
– Charging current up to 5 A with 10-mA
resolution
• Support wide range of input sources
– 3.6-V to 24-V Wide input operating voltage
range with 30-V absolute maximum rating
– Maximum power tracking with VINDPM up to
22 V and IINDPM up to 3.3 A
– Detect USB BC1.2, SDP, CDP, DCP, HVDCP
and non-standard adapters
• Dual-input power mux controller for source
selection
• High level integration
– Four switching MOSFETs and BATFET
– Input current and charging current sensing
• Narrow-VDC (NVDC) Power Path management
• Power USB port from battery (USB OTG)
– 2.8-V to 22-V OTG output voltage with 10-mV
resolution to support USB-PD PPS
– OTG Output current regulation up to 3.32 A
with 40-mA resolution
• Flexible autonomous and I2C mode for optimal
system performance
• Integrated 16-bit ADC for voltage, current and
temperature monitor
• Low battery quiescent current
– Typical 21-µA at battery only operation
– Typical 600 nA in Charger Shutdown Mode
• High accuracy
– ±0.5% Charge voltage regulation for 2s battery
– ±5% Charge current regulation
– ±5% Input current regulation
• Safety
– Thermal regulation and thermal shutdown
– Input/battery OVP and OCP
– Converter MOSFETs OCP
– Charging safety timer
1
• Package
– 56-Pin 2.9mm × 3.3mm WCSP
2 Applications
Smartphone, Tablet, Drone
Wireless speaker, Digital Camera
Mobile printer, Electronic point of sales (EPOS)
3 Description
The BQ25790 is a fully integrated switch-mode buck-
boost charger for 1-4 cell Li-ion battery and Li-
polymer battery. The integration includes 4 switching
MOSFETs (Q1, Q2, Q3, Q4), input and charging
current sensing circuits, the battery FET (QBAT) and
all the loop compensation of the buck-boost
converter. It provides high power density and design
flexibility to charge batteries across the full input
voltage range for USB Type-C™ and USB power
delivery (USB-PD) applications such as smart phone,
tablet and other portable devices.
Device Information(1)
PART NUMBER
PACKAGE
BQ25790
DSBGA (56)
BODY SIZE (NOM)
2.90 x 3.30 mm2
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
USB
VBUS
SW1
PMID
SYS SYSTEM LOAD
SW2
BAT
I2C Bus
Host
Host
Control
BQ25790 BATP
GND
BATN
1s~4s
Battery
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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BQ25790 Datasheet Preview

BQ25790 Datasheet

Buck-Boost Battery Charger

No Preview Available !

BQ25790
SLUSDF9 – JUNE 2020
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Description (continued)......................................... 3
6 Pin Configuration and Functions ......................... 4
7 Specifications......................................................... 7
7.1 Absolute Maximum Ratings ...................................... 7
7.2 ESD Ratings.............................................................. 7
7.3 Recommended Operating Conditions....................... 7
7.4 Thermal Information .................................................. 8
7.5 Electrical Characteristics........................................... 8
7.6 Timing Requirements .............................................. 16
7.7 Typical Characteristics ............................................ 17
8 Detailed Description ............................................ 19
8.1 Overview ................................................................. 19
8.2 Functional Block Diagram ....................................... 20
8.3 Feature Description................................................. 21
8.4 Device Functional Modes........................................ 45
8.5 Register Map........................................................... 46
9 Application and Implementation ...................... 115
9.1 Application Information.......................................... 115
9.2 Typical Application ................................................ 116
10 Power Supply Recommendations ................... 123
11 Layout................................................................. 124
11.1 Layout Guidelines ............................................... 124
12 Device and Documentation Support ............... 125
12.1 Device Support .................................................. 125
12.2 Documentation Support ...................................... 125
12.3 Receiving Notification of Documentation
Updates.................................................................. 125
12.4 Support Resources ............................................. 125
12.5 Trademarks ......................................................... 125
12.6 Electrostatic Discharge Caution .......................... 125
12.7 Glossary .............................................................. 125
13 Mechanical, Packaging, and Orderable
Information ......................................................... 126
4 Revision History
DATE
June
REVISION
*
NOTES
Initial release.
2
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Product Folder Links: BQ25790
Copyright © 2020, Texas Instruments Incorporated



Part Number BQ25790
Description Buck-Boost Battery Charger
Maker etcTI
Total Page 3 Pages
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