Max8895 USB Compatible Linear Battery Charger

MAX8895_ It is a USB compatible linear battery charger, which can be powered by USB port or special charger, and can automatically detect the adapter type and USB enumeration. Max8895x / max8895y integrates battery disconnect switch, current detection circuit, MOSFET regulator and thermal management circuit. It can build the simplest and smallest independent charging scheme without external reverse protection Schottky diode.MAX8895_ It includes automatic detection of the type of charging adapter, which can distinguish USB 2.0 devices, USB chargers and special chargers. In addition, max8895x / max8895y include USB enumeration function, which can automatically negotiate with USB host to obtain maximum current from USB 2.0 device or USB charger without processor intervention. Adapter type detection follows USB 2.0 specification and USB charging specification version 1.1.MAX8895_ Control the charging sequence of a single Li battery, starting from the initial power ready indication, through precharge, fast charge and floating charge to the final charging termination. The charging is controlled by the adjustment scheme of constant current, constant voltage and constant die temperature (cccvctj), which can ensure safe operation under any condition. The maximum charging current is adaptively controlled by subtracting the system current from the input limiting current to ensure the maximum charging current under any given condition.

MAX8895_ The optimized intelligent power control can make rational use of limited USB or adapter power. The battery charging current is independent of sys_ Input current limit to charge the battery on the premise of ensuring the power supply of the system. The automatic input selector switch controls the connection of the switching system, battery and external power supply. This allows the system to work normally when there is no battery power supply, or the battery is completely discharged or discarded.Other functions include undervoltage latch (UVLO), overvoltage protection (OVP), charge state indication, charge fault indication, power readiness monitoring, battery temperature monitoring, charge timer and 3.3V output.MAX8895_ It is powered by 4.0V to 6.6v power supply and has overvoltage protection up to 16V. MAX8895_ Operating in the extended stage temperature range (- 40 C to 85 C) in a compact 2.36mm x 2.36mm, 25 ball WLP package (0.4mm ball spacing).

Key characteristicsAuto detect adapter typeThe enumeration function does not require processor intervention

USB works at low speed without external crystal oscillator (max8895w / max8895x)USB works at full speed, using external crystal oscillator (max8895y)USB 2.0 compliant

Follow USB charging specification (version 1.1)Adaptive adjustment of input current limit for special chargerInput overvoltage protection up to 16V

Automatic distribution of current between battery charging and system power supplySmart Power Selector ) It is allowed to keep working when the battery is completely discharged or not inserted into the batteryNTC monitors battery temperature

No external MOSFET is requiredThermal management to prevent overheating2 a off current

Tiny 2.36mm x 2.36mm, 25 solder ball, 0.4mm solder ball spacing WLP package