Pt4110 Led Driver Step Up Soic14 Itytarg

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.

FEATURES
2.7V to 5.5V Input Voltage Range
35V Maximum Step-Up Voltage
<1µA Shutdown Mode
1.2MHz Fixed Frequency Operation
Cycle-By-Cycle Current Limit
Open Load Protection
Under Voltage Lockout
Integrated Soft-Start
Thermal Shutdown
Frequency Jittering for better EMI performance
SOT89-5 or SOP8 package

APPLICATIONS
White LED Power Suppliers
Flat Screen LCD Bias Suppliers
Portable Media Players
GPSs
General middle-sized LCD backlight