TEXAS Manuals

The bq2058T Lithium Ion Pack Supervisor is a small, integrated product that provides over-voltage, under-voltage protection and overcurrent monitoring for two lithium-ion (Li-Ion) series cells, accommodating battery packs containing series/parallel configurations. The low operating current does not overdischarge the cells during periods of storage and does not significantly increase the system discharge load. The bq2058T can be part of a low-cost Li-Ion charge control system within the battery pack. The bq2058T controls two external FETs to limit the charge and discharge potentials. The bq2058T allows charging when each individual cell voltage is below VOV (overvoltage limit). If the voltage on any cell exceeds VOV for a user-configurable delay period (tOVD), the open-drain CHG pin goes to the high-impedance state, shutting off charge to the battery pack. This safety feature prevents overcharge of any cell within the battery pack. After an over-voltage condition occurs, each cell must fall below VCE (charge enable voltage) for the bq2058T to re-enable charging.

bq2058 is a lithium ion battery pack supervisor that protects and individually monitors 3 or 4 series lithium ion (Li-Ion) cells for overvoltage, undervoltage and overcurrent. It is designed for battery pack integration, has minimal external components, drives external FET switches and has selectable overvoltage (VOV) thresholds.

The document describes the features and functions of the bq2058 Lithium Ion Pack Supervisor, including overvoltage, undervoltage, and overcurrent protection. It is designed for three to four Li-Ion series cells and can be part of a low-cost Li-Ion charge control system.

This document introduces the features of the BENCHMARQ bq2057 series advanced Li-Ion linear charge-management ICs, including 0.3V dropout voltage, dynamic compensation of battery pack's internal impedance, optional temperature-monitoring before and during charge, integrated voltage and current regulation with programmable charge-current and high- or low-side current sensing, integrated cell conditioning for reviving deeply discharged cells and minimizing heat dissipation during initial stage of charge, better than ±1% voltage regulation accuracy, charge status output for LED or host processor interface, automatic battery-recharge feature, charge termination by minimum current and low-power sleep mode.

This product is a lithium battery charging management IC, which is applied to small portable electronic products. Its features are integrated with high-precision current and voltage regulation, battery status detection, temperature monitoring, charge termination, charge status indication and AutoComp.

This product is a lithium-ion battery charging management IC with low-voltage drop-out protection. It can be used for single or dual cell lithium-ion battery packs and supports coke or graphite anode materials.

bq2056 is a low-cost high-precision Li-Ion battery charge-control device with automatic charge-rate compensation (AutoComp), trickle-charger interface output, single-cell 4.1V, and two-cell 8.2V

bq2054 is a lithium battery fast charge IC produced by bq company, which can safely charge lithium batteries. It has the functions of voltage regulation current limited charging, fast charging terminated by selectable minimum current, safety backup termination on maximum time, charging continuously qualified by temperature and voltage limits, pulse width modulation control ideal for high efficiency switch mode power conversion, direct LED control outputs display charge status and fault conditions.

The bq2052 Lithium Primary Gas Gauge IC is intended for battery-pack or in-system installation to maintain an accurate record of available battery capacity. The IC monitors a voltage drop across a sense resistor connected in series with the cells to determine discharge activity of the battery. The bq2052 applies compensations for battery temperature and discharge rate to the available charge counter to provide available capacity information across a wide range of operating conditions. Compensated available capacity may be directly indicated using an LED display. The LED display is programmable and can be configured as two, four, or five segments. These segments are used to depict available battery capacity. The bq2052 supports a single-wire serial communications link to an external micro-controller. The link allows the micro-controller to read

bq2050h li-ion battery pack power gauge evaluation system, including evaluation system, evaluation software, battery connection circuit, power gauge circuit and so on

The bq2050h is a high precision lithium ion battery capacity counter that can be used for battery packs or system integration. It has low power consumption, high integration, high accuracy, and high reliability.

bq2050 Lithium Ion Power Gauge™ IC is intended for battery-pack or in-system installation to maintain an accurate record of available battery capacity.

The bq2040 gas gauge IC with SMBus interface is intended for battery pack or in-system installation to maintain an accurate record of available battery charge. The bq2040 directly supports capacity monitoring for NiCd, NiMH, and Li-Ion battery chemistries. The bq2040 uses the System Management Bus v1.0 (SMBus) protocol and supports the Smart Battery Data (SBData) commands. The bq2040 also supports the SBData charge control functions. Battery state-of-charge, remaining capacity, remaining time, and chemistry are available over the serial link. Battery-charge state can be directly indicated using a four-segment LED display to graphically depict battery full-to-empty in 25% increments. The bq2040 estimates battery self-discharge based on an internal timer and temperature sensor and user-programmable rate information stored in external EEPROM. The bq2040 also automatically re-calibrates or “learns” battery capacity in the full course of a discharge cycle from full to empty.

The bq2031 is a lead-acid battery fast charge ic that can achieve constant voltage, constant current or pulsed current charging, and can set the regulator frequency by an external capacitor for design flexibility. The switch-mode design keeps power dissipation to a minimum, suitable for high charge current applications. A charge cycle begins when power is applied or the battery is replaced. For safety, charging is inhibited until the battery voltage is within the configured limits.