Power Electronics / Power Management


Boost charger for 2-cell series lithium-ion battery

29 July 2020 Power Electronics / Power Management

The MP2672 from Monolithic Power Systems is a highly integrated, flexible switch-mode battery charger IC for a lithium-ion battery with two cells in series, which is used in a wide range of portable applications.

When the input power supply is present, the MP2672 operates in boost mode to charge the battery with two cells in series. When charging is enabled, the MP2672 automatically detects the battery voltage and charges the battery in three phases: pre-charge, constant-current charge, and constant-voltage charge. Other features include charge termination and auto-recharge.

The MP2672 also has a narrow voltage DC (NVDC) power structure. When the battery is weak, the MP2672 regulates the system output at the minimum voltage level to power the system instantly and charge the battery via the battery FET simultaneously.

The MP2672 also has a cell balance function. It monitors the voltage across each cell and equalises cell voltages once the difference exceeds the mismatch threshold. It has two configuration modes: standalone mode and host control mode. In standalone mode, the charging parameters can be configured by the hardware pins. In host control mode, the charging parameter can be configured by the I2C registers.

The MP2672 has diversified and robust protections. It has a thermal regulation loop to decrease the charge current if the junction temperature exceeds the thermal loop threshold. It also has battery temperature protection compliant with JEITA standards. Other safety features include input over-voltage protection, battery over-voltage protection, thermal shutdown, battery temperature monitoring, a watchdog timer, and a programmable backup timer to prevent prolonged charging of a dead battery.


Credit(s)



Share this article:
Share via emailShare via LinkedInPrint this page

Further reading:

Schneider Electric partners with Drakenstein Municipality
Schneider Electric South Africa Power Electronics / Power Management
Drakenstein Municipality, situated in Paarl in the Western Cape, is one of the first distribution utilities globally to implement Schneider Electric’s green, SF6-free RM AirSeT switchgear with pure air technology and native digital connectivity.

Read more...
E-Mobility: navigate safety, interoperability and conformance
Concilium Technologies Power Electronics / Power Management
Although the concept of electric vehicles is not a new one, the market remains in its infancy, and is not well-regulated or fully operational. This presents a number of challenges for manufacturers throughout the EV and EVSE ecosystem.

Read more...
Webinar: Decarbonise with industrial drives
Power Electronics / Power Management
Infineon's TRENCHSTOP IGBT7 and CoolSiC technologies increase the efficiency of your industrial drive design, ultimately resulting in cost savings for you, and a more sustainable future for all.

Read more...
Analysis of switch-mode power supply: inductor violations
Altron Arrow Editor's Choice Power Electronics / Power Management
Common switch-mode power supply (SMPS) design errors are discussed, and their appropriate rectification is specified, with details on complications that arise with the power stage design of DC-DC switching regulators.

Read more...
Hardware architectural options for artificial intelligence systems
NuVision Electronics Editor's Choice AI & ML
With smart sensors creating data at an ever-increasing rate, it is becoming exponentially more difficult to consume and make sense of the data to extract relevant insight. This is providing the impetus behind the rapidly developing field of artificial intelligence.

Read more...
Compact PCB-mount SMPS
RS South Africa Power Electronics / Power Management
Traco Power’s 5W PCB-mount switch mode power supply (SMPS) offers high efficiency, and is well suited for a variety of applications in the automation, electronics, electrical and mechanical industries.

Read more...
AC-DC brick PSU
Conical Technologies Power Electronics / Power Management
These PSUs have a typical efficiency of up to 92%, and a power factor value of up to 0,99. They are available in 12, 24, 28, 48 and 54 V output versions.

Read more...
5 kW switching PSU range
Conical Technologies Power Electronics / Power Management
Mornsun has released a new switching power supply range, the LMF5000-25Bxx, which has a 5000 W capacity, and features universal AC input configurations.

Read more...
Reliable charging range
Current Automation Power Electronics / Power Management
Whether you’re powering essential electronics, keeping emergency equipment operational, or maintaining the performance of critical machinery, the need for dependable charging solutions cannot be overstated.

Read more...
Microchip expands its mSiC solutions
EBV Electrolink Power Electronics / Power Management
The highly integrated 3,3 kV XIFM plug-and-play digital gate driver is designed to work out-of-the-box with high-voltage SiC-based power modules to simplify and speed system integration.

Read more...