USB charger IC with fuel gauge

The new switching charger IC – DA9150 from Dialog is integrated with ARM Cortex M0 processor for power management and a fuel gauge to know the battery charge levels. The fuel gauge is said to be 99% accurate in measuring battery state of charge. This CC and CV fast charger is based on a 3MHz DC/DC converter with small 1µH inductors can charge single-cell Lithium-ion batteries, with a maximum charging current of 2 A. With efficiency of above 90% , DA9150 supports completely autonomous charging from a 5 V input supply and includes a power supply adaptation feature which enables it to charge from a broad range of power supplies – including 5 V USB battery charging specification v1.2 compliant supplies – and find the optimal operating point. The integrated over-voltage protection allows voltages of up to 24 V. This device supports LTE data dongles or USB memory sticks by having a buck converter can operate in reverse mode, which enables DA9150 to supply 5 V to VBUS for USB OTG functionality with an output current of up to 1 A. “The concept of combining a fuel gauge with charging functions exploits many synergies of battery-related functions within a smartphone design. Furthermore, the introduction of the DA9150 supports our ongoing strategy of low-cost smartphone initiatives to address the fast-growing China smartphone LTE market,” said Udo Kratz, Senior Vice President...