Generation 1 1.1A, Single-Input 5-V Power Supply IC for Contactless Charging Applications

The bq25046 is a highly integrated

linear power supply IC targeted at both wired and wireless power applications. With

an accurate 5-V regulated output and integrated 3.3-V LDO, the bq25046 is an ideal

solution for wireless power supply solutions up to 5 W.

The bq25046 integrates several

functions which enable a wireless charging solution within a small area and low

component count. These include a 3.3-V LDO which drives an MSP430BQ1010 wireless

controller, high-accuracy current sense for calculating receiver-side power usage,

100mA/400mA current limits enable robust communication at all load current levels,

and integrated pass FET acts as load disconnect switch and 5-V regulator to protect

downstream circuitry. In addition, the bq25046 has an absolute maximum input voltage

of 30 V and an OVP threshold of 15 V, which enables safe and robust operation in

inductive power transfer systems that use either resistive or capacitive load

modulation.