Battery over-voltage protection

If the single-cell Li-ion and lithium polymer panasonic cgr-d210 battery over charging, over its float voltage (typically about 4.2V), the potential dangers that may occur. Thus, portable designers currently seek redundant safety mechanisms to ensure the safety of the battery, but also meet the relevant standards. bq24314 monitors the battery voltage to provide a second layer of protection. If the detected voltage is too large, it will interrupt input charging power supply.

High-current input over-current protection

If a direct connection from the input to the system bus voltage, panasonic cgr-d110 battery charger integrated power management devices may be entered on the over-current situation. In many cases there is no suitable protection mechanism used to restrict input from the adapter to the system is too large currents. Programmable bq24314 can sensing and regulating its integrated MOSFET, ensure that the system does not inhalation of excessive current, thus limiting the inflow of a large input current.

bq24314 and bq24316 key technical characteristics of

Provide three kinds of variables Protection: Input over-voltage, input over-current and panasonic cga-du21 battery over-voltage;

30V maximum input voltage;

Integrated power FET and current sensor supports up to 1.5A Input Current;

Response time of less than 1μs effectively prevent the importation of over-voltage;

Input over-voltage protection threshold of 5.85V (bq24314) or 6.8V (bq24316);

For the errors caused by the current transients triggered by higher immunity;

Status indication – fault condition;

Thermal Shutdown dell inspiron 1526 battery

Pricing and Availability

bq24314 and the bq24316 is now in volume production is available through TI and its authorized distributors to order. Both devices are micro and small 2 mm × 2 Haomi 8-pin small-outline no-lead (SON) package.

TI plans to launch the fourth quarter of 2007, a new charger front-end protection IC – bq24300. Its fixed input over-current protection threshold of 300mA, input over-voltage protection threshold is 10.5V, Bluetooth headset can meet the needs of low-power applications. bq24300 can serve as a linear regulator to use, for input over-voltage to reach the threshold voltage, it can manage up to 5.5V output voltage (bq24304 to 4.5V). In addition, bq24300 circuit also through the optional external P-Channel MOSFET, to prevent failures caused by the dell inspiron 1545 battery adapter, reverse polarity (reverse polarity).