Battery Management ICs are integrated circuits that control rechargeable batteries in electronic systems. For wired and wireless applications, Battery Management ICs can be utilized with any rechargeable battery chemistry, such as lithium-ion, lithium-polymer, lead-acid, and nickel-based batteries. Consumer electronics device consumption has increased given the rapid technological breakthroughs, rising urbanization, enhanced customer purchasing, and improving living standards, which has resulted in a persistent need for battery management solutions. In this article, everything PE has listed some interesting Battery Management ICs that were trending on the website.
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USB Connector Interface IC for Smartphones & Digital Camera Applications
The BD91411GW from ROHM Semiconductor is a USB Connector Interface IC that is designed to multiplex mini or micro USB interfaces. This interface IC requires an input voltage of 3.8 - 28 V. This BMIC is a complete solution that consists of two MHL/USB/UART paths, one audio path, and a monaural microphone path with a 4-to-1 multiplexer. It uses an audio switch to handle effects due to applied negative voltage signal and connects microphone signal paths to VBUS or HDPR. This RoHS-compliant BMIC integrates power-on reset, USB charger protection, over-voltage protection (OVP), and over-current protection (OCP) to prevent short-circuit-related damages. Read more.
AEC-Q100 Qualified Li Battery Monitoring and Balancing IC
The TLE9012DQU from Infineon Technologies is a Li-ion Battery Monitoring and Balancing IC that is designed for Li-ion battery packs used in hybrid electric vehicles (HEV, plug-in hybrid electric vehicles (PHEV), battery electric vehicles (BEV), as well as in 12 V Li-ion batteries. It requires an input voltage of 4.75 - 60 V. This BMIC can monitor, communicate with, and control up to 12 serially connected cells. It includes a cell management unit, a round-robin diagnosis unit, an auxiliary/temperature and voltage measurement unit, a UART/GPIO block, an iso UART interface, and a power supply unit. This AEC-Q100-qualified BMIC uses a 16-bit high-resolution ADC per cell with a selectable measuring mode to conduct high accuracy and temperature-compensated measurements. It connects 5 channels to an external NTC, thereby allowing it to measure the internal temperature of various blocks. Read more.
Battery Monitoring and Protective Discharge IC
The SiP31001 from Vishay is a Battery Monitoring and Protective Discharge IC that is designed to protect a single-cell Li-Ion battery from sudden voltage surges under elevated temperature conditions. It requires an input voltage of 2.3 - 5.5 V. This IC allows the battery to relax after being charged, even when it is kept on-float or during trickle charge scenarios. It discharges batteries at a constant rate when pre-set safeguard limits of both battery voltage and temperature are exceeded and automatically stops the discharge operation when either the battery voltage or temperature falls below the threshold. This protective discharge IC switches to monitoring mode when the battery voltage is over 4 V and remains in this state for up to 5 ms to compare voltage and temperature values with pre-set limits. Read more.
Protection IC for Li-Ion / Li-Polymer Rechargeable Battery Pack
The R5651 Series from Nisshinbo Micro Devices is an Overcharge and Discharge Protection IC for 3 to 5-series cell Li-ion / Li-polymer rechargeable battery pack. This IC requires an input voltage of 4 V - 25 V. It can select any number of cells by applying a certain voltage on the SEL pin. This IC uses a current-sense resistor with low resistance ratings that help reduce the high temperature of large currents and achieve the thermal design of a board easily. It has a separation between charging and discharging paths to achieve low impedance of the battery pack. This IC employs the cascading technique to achieve simple circuit configuration for battery packs with six cells or more, as well as to reduce external components. It includes short-circuit and protection circuits for charge and discharges overcurrents. This IC is available in a through-hole package that measures 7.8 x 6.4 mm. Read more.
Gas Gauge Battery Management IC for Wearable Applications
The GG25L from STMicroelectronics is a Gas Gauge IC that is designed to include the necessary hardware functions required to implement a low-cost gas gauge for battery monitoring applications. It requires an input voltage of 2.7 - 4.5 V. This BMIC consists of an ADC converter, oscillator, control logic and state machine, control registers, MUX, battery detection and control, an internal temperature sensor, memory unit, and external interfaces. It embeds monitoring functions that provide accurate measurements of the battery voltage, current, and temperature. This IC includes a Coulomb counter to track the state-of-charge (SOC) when the battery is charging or discharging at a high rate. It utilizes an internal OptimGauge algorithm that precisely simulates the dynamic behavior of the battery and provides an estimate of the open-circuit voltage (OCV). Read more.
USB Type-C Autonomous Charger for Li-ion/LiFePO4 Batteries
The MAX77757 from Maxim Integrated is a USB Type-C Autonomous Charger with for 1-Cell Li-ion/LiFePO4 Batteries. It has an input voltage of 4.5 to 13.7 V and an input current of up to 3 A. This JEITA-compliant charger supports termination voltage of 4.1 to 4.5 V for Li-ion and Li-poly batteries, and 3.6 to 3.7 V for LiFePO4 batteries. It offers reverse-boost capability up to 5.1 V and provides discharge current protection of up to 6 A. This charger is equipped with a smart power selector and a battery true-disconnect FET to control the charging and discharging of the battery or to isolate the battery in case of a fault condition. It can be controlled via a USB interface and has an adaptive input current limit (AICL) function that regulates the input voltage by reducing input current to prevent the voltage of a weak adapter from collapsing or folding back. Read more.
Automotive Qualified Li-ion Battery Cell Controller
The MC33771B from NXP Semiconductors is an Automotive Qualified Lithium-ion Battery Cell Controller IC. This controller IC has an input voltage of 9.6 V to 61.6 V and a charge current of up to 8 mA. It is designed to manage up to 14 cells and can conduct operations such as ADC conversions of differential cell voltages and currents, battery coulomb counting, and battery temperature measurements. This BMIC supports an SPI interface, and transform isolation (TPL) topology to digitally transmit the information to the connected device. It also consists of seven GPIO/temperature sensor inputs, and onboard passive cell balancing with a diagnostic feature. This AEC-Q100 qualified controller IC can detect internal and external faults such as open lines, shorts, and leakages and offers over/under-voltage and temperature detection to protect the device against short-circuit-related damages. Read more.
Dual-Phase Fast Battery Charger IC for IoT Applications
The HL7132WL01 from Halo Microelectronics is a Dual-Phase Fast Direct Charger IC that is designed to enable 1-cell Li-ion and Li-based polymer batteries. It requires an input voltage from 5.5 V to 11.7 V. This Battery Management IC (BMIC) consists of a dual-phase switched capacitor converter and a reverse blocking MOSFET (QRB FET). The switched capacitor architecture and MOSFETs integrated into this BMIC are optimized to provide a duty cycle of 50% during charge pump (CP) mode. It provides constant current regulation from QRB FET during the CP mode and is controlled through a closed loop of current sensing or battery current sensing. This fast charger IC utilizes a built-in 10-bit ADC chip that transmits information such as input voltage, output voltage, battery voltage, and die temperature to the system to optimize charging control operation. Read more.
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