Date: 24/05/2010

Lithium ion/polymer battery charger IC from Diodes

Diodes Incorporated has announced the release of its API9221 lithium ion/polymer battery charger IC for handheld equipment requiring both USB and AC/DC power adapter charging inputs. This is a dual-input IC and enables USB host and DC adaptor connections, delivering charge currents in accordance with the USB standard or up to 1.2A.

The API9221 inputs can withstand a maximum voltage of 28V, which reduces external protection component requirements. The charger suspends charging when the input voltage exceeds 5.4V on the USB input or 6.9V on the DC adaptor input to protect the IC, battery, and system. It also features reverse current protection. The API9221 has a bypass LDO regulator. This enables a host controller to detect the connection of an out-of-specification supply voltage, thus keeping the charger in its off state condition until a valid supply is connected. The device offers good thermal regulation and protection. It can reduce charge current and therefore help in keeping the die temperature within safe operating conditions. It follows the industry-standard CC/CV charging algorithm. This allows the USB, adaptor charge currents and end-of-charge currents to be user-configured using an external resistor settings. It is said to produce only 1% error across the device's operating temperature range and also ensures battery charging up to 4.2V.

To know more visit: www.diodes.com