NVDC SMBus battery Buck-boost charge controller with system power monitor & processor
Product details
Parameters
Package | Pins | Size
Features
- 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
- 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 3.3-µH Inductor
- Host Control Interface for Flexible System Configuration
- SMBus (bq25700A) Port for Optimal System Performance and Status Reporting
- Hardware Pin to Set Input Current Limit Without EC Control
- Integrated ADC to Monitor Voltage, Current and Power
- 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
- 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
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Description
The bq25700A 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 system from crashing.
The bq25700A charges battery from a wide range of input sources including USB adapter, high voltage USB PD sources and traditional adapters.
During power up, the charger sets converter to buck, boost or buck-boost configuration based on input source and battery conditions. The charger automatically transits among buck, boost and buck-boost configuration without host control.
In the absence of an input source, the bq25700A supports On-the-Go (OTG) function from 1- to 4-cell battery to generate 4.48 V to 20.8 V on VBUS. During OTG mode, the charger regulates output voltage and output current.
The bq25700A monitors adapter current, battery current and system power. The flexibly programmed PROCHOT output goes directly to CPU for throttle back when needed.
Technical documentation
= Featured
| Type | Title | Date | |
|---|---|---|---|
| * | Datasheet | bq25700A SMBus Multi-Chemistry Battery Buck-Boost Charge Controller With System Power Monitor and Processor Hot Monitor datasheet (Rev. A) | May 31, 2018 |
| Technical articles | When to use rechargeable batteries in small battery applications | Oct. 01, 2019 | |
| Technical articles | Transform the way you charge your devices with USB Type-C and PD | Jul. 18, 2017 | |
| Application notes | Layout Guidelines for the bq2570x Switching Charger | May 19, 2017 | |
| User guides | bq2570x Evaluation Module | May 12, 2016 | |
| Technical articles | Should I use a linear charger or a switching charger? | Oct. 30, 2015 | |
| Technical articles | Summertime and the livin' is easy | Jun. 20, 2014 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
BQ25700AEVM-732
Description
The bq25700A evaluation module (EVM) is an SMBus controlled NVDC (narrow voltage DC) buck boost charge controller with N-CH MOSFET Selector and Current Monitoring. The input voltage range, for the buck converter, is between 3.5V and 24 V, with a programmable output of 1–4 cells and a charge (...)
Features
- Host-controlled NVDC 1S-4S battery buck boost charger with 3.5V~24V input
- Ultra low quiescent current of 600 μA and high PFM light load efficiency >80% at 20 mA load to meet energy star and ErP Lot6
- High integration charger has comprehensive /PROCHOT, input and battery current monitor (IADP/IBAT (...)
Software development
BQSTUDIO — Battery Management Studio (bqStudio) offers a full suite of robust tools to assist with the process of evaluating, designing with, configuring, testing, or otherwise utilizing TI Battery management products. This includes features that provide full access to registers and data memory including (...)
Features
- Real-time Gauge Dashboard for monitoring basic registers
- Full register access and logging
- Full data memory access and logging
- Product configuration and monitoring tools
- Import and export of product configurations
- Calibration and test automation
- Export of FS files for the target production environment
Reference designs
PMP40312 — PMP40312 is a dual port USB Type-C™ PD car charger reference design. The design's normal input voltage range is from 9V to 14.5V, and the maximum input voltage can be to 42V.The pure analog configuration for the USB type-C source controller--TPS25740B makes the PD negotiation easy. The (...)
Design files
-
download PMP40312 BOM.pdf (113KB) -
download PMP40312 Assembly Drawing.pdf (439KB) -
download PMP40312 PCB.pdf (2280KB) -
download PMP40312 CAD Files.zip (26KB) -
download PMP40312 Gerber.zip (672KB)
PMP40069 — The PMP40069 is a reference design for portable DLP pico projectors It also has a 3 cell battery charger. The battery will provide the power to the projector when the adapter isn't available . The solution implements DLPA3000 PMIC/LED driver, DLPC3438 display controller and SMBus (...)
Design files
-
download PMP40069 BOM.pdf (121KB) -
download PMP40069 Assembly Drawing.pdf (452KB) -
download PMP40069 PCB.pdf (4263KB) -
download PMP40069 CAD Files.zip (26KB) -
download PMP40069 Gerber.zip (489KB)
CAD/CAE symbols
| Package | Pins | Download |
|---|---|---|
| QFN (RSN) | 32 | View options |
Ordering & quality
Support & training
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