PT4110 4110 PT4110E89E SOT89-5

PT4110 4110 PT4110E89E SOT89-5

The PT4110 is a high efficiency step-up DC/DC
converter designed for driving multiple strings of up to
eight series-connected white LED from a single cell
Lithium Ion battery. It regulates the output current,
ideal for driving light emitting diodes (LED) whose
light intensity is proportional to the current passing
through them. The external ballast resistor sets the LED
current ranging from 5mA to 20mA, which can be
easily adjusted using either a DC voltage or a pulse
width modulated (PWM) signal alternatively. Its low
300mV feedback voltage reduces power loss and
improves efficiency.
The PT4110 has multiple features to protect itself from
fault conditions including built-in open load protection,
cycle-by-cycle current limit, over temperature
shutdown, input under voltage control and integrated
soft-start.
The PT4110 is available in SOT-89-5 and SOP-8
packages