The XB6104x is a high frequency boost converter designed for small to medium sized LCD bias supplies and white LED backlight supplies. The device is ideally suited for generating output voltages up to 28V using two NiMH/NiCd batteries or a single Li-ion battery. The device can also be
used to achieve power conversion from standard 3.3V or 5V to 12V.
The XB6104x operates at switching frequencies up to 1MHz, which supports the use of small external components that use ceramic and tantalum output capacitors. The XB61040 device has an internal 400mA switching current limit, while the XB61041 device has a 250mA switching current limit, which provides lower output voltage ripple and allows for the use of smaller form factor inductors for low-power applications. The low quiescent current (28μA typical), combined with the optimised control scheme, allows the devices to operate at very high efficiency over the entire load current range.
