BQ25703A Datasheet, PDF (1/81 Pages) Texas Instruments – I2C Multi-Chemistry Battery Buck-Boost Charge Controller With System Power Monitor and Processor Hot Monitor

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bq25703A
SLUSCU1 – MAY 2017
bq25703A I2C Multi-Chemistry Battery Buck-Boost Charge Controller With System Power
Monitor and Processor Hot Monitor
1 Features
•1 Charge 1- to 4-Cell Battery From Wide Range of
Input Sources
– 3.5-V to 24-V Input Operating Voltage
– Supports USB2.0, USB 3.0, USB 3.1 (Type C),
and USB_PD Input Current Settings
– Seamless Transition Between Buck and Boost
Operation
– Input Current and Voltage Regulation (IDPM
and VDPM) Against Source Overload
• Power/Current Monitor for CPU Throttling
– Comprehensive PROCHOT Profile, IMVP8
Compliant
– Input and Battery Current Monitor
– System Power Monitor, IMVP8 Compliant
• Narrow-VDC (NVDC) Power Path Management
– Instant-On With No Battery or Deeply
Discharged Battery
– Battery Supplements System When Adapter is
Fully-Loaded
– Ideal Diode Operation in Supplement Mode
• Power Up USB Port From Battery (USB OTG)
– Output 4.48-V to 20.8-V Compatible With USB
PD
– Output Current Limit up to 6.35 A
• 800-kHz or 1.2-MHz Programmable Switching
Frequency for 1-µH to 2.2-µH Low Profile Inductor
• Host Control Interface for Flexible System
Configuration
– I2C (bq25703A) Port for Optimal System
Performance and Status Reporting
– Hardware Pin to Set Input Current Limit
Without EC Control
• High Accuracy Regulation and Monitor
– ±0.5% Charge Voltage Regulation
– ±2% Input/Charge Current Regulation
– ±2% Input/Charge Current Monitor
– ±5% Power Monitor
• Safety
– Thermal Shutdown
– Input, System, Battery Overvoltage Protection
– MOSFET Inductor Overcurrent Protection
• Low Battery Quiescent Current
1
• Input Current Optimizer (ICO) to Extract Max Input
Power
• Charge Any Battery Chemistry: Li+, LiFePO4,
NiCd, NiMH, Lead Acid
• Package: 32-Pin 4 × 4 WQFN
2 Applications
• Drones, Bluetooth Speakers, IP Cameras,
Detachable, and Tablet PCs and Power Bank
• Industrial and Medical Equipment
• Portable Equipment With Rechargeable Batteries
3 Description
The bq25703A is a synchronous NVDC battery buck-
boost charge controller, offering low component
count, high efficiency solution for space-constraint,
multi-chemistry battery charging applications.
The NVDC-1 configuration allows the system to be
regulated at 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 input source from being
overloaded.
The bq25703A charges battery from a wide range of
input sources including USB adapter, high voltage
USB PD sources and traditional adapters.
Device Information ⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
bq25703A
WQFN (32)
4.00 mm × 4.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Adapter
3.5V ± 24V
Application Diagram
Q1 ^Q2
Q3
Q4
VSYS
BATT
(1S-4S)
HIDRV1 SW1BTST1BTST2SW2 HIDRV2
LODRV1
VBUS
LODRV2 _SYS
ACN
bq25703A
/BATDRV
ACP
SRP
SRN
Host
(703 I2C)
Copyright © 2017, Texas Instruments Incorporated
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.